Patent Publication Number: US-2022213813-A1

Title: Combined cycle power device

Description:
FIELD 
     The present invention belongs to the flied of energy and power technology. 
     BACKGROUND 
     Cold demand, heat demand and power demand are common in human life and production. It is an important way to obtain and provide power by the conversion of thermal energy into mechanical energy. In general, the temperature of heat source reduces and varies with the release of heat. When fossil fuels are used as the primary energy, the heat source has the dual characteristics of both high-temperature and variable temperature. This makes it is difficult to transform more heat energy into mechanical energy using the power device based on a single thermal cycle. For high-quality fuel, the traditional gas-steam combined cycle can be used to obtain a high thermal efficiency. However, there are still some problems to be solved, such as high cost, large investment and low thermal efficiency to be improved. 
     Take the vapor power device with the outside combustion for example, its heat source has the dual characteristics of high-temperature and variable temperature. For those vapor power devices based on the Rankine cycle, the material&#39;s temperature resistance and pressure resistance abilities and safety concerns limit the parameters of the cycle&#39;s working medium. Therefore, there is a big temperature difference between the working medium and the heat source, which leads to big irreversible loss and low efficiency. This means that there is great potential to improve the thermal efficiency. 
     Humans need to use heat energy simply, actively, efficiently for achieving power. Therefore, the present invention provides a combined cycle power device with high thermal efficiency, strong safety, adaptation to high-temperature heat source or variable temperature heat source and response to various fuels. 
     THE CONTENTS OF THE PRESENT INVENTION 
     The combined cycle power device are mainly provided in the present invention, and the specific contents of the present invention are as follows: 
     1. A combined cycle power device comprising a compressor, an expander, a pump, a high-temperature heat exchanger, a condenser and an evaporator. An evaporator has a vapor channel connected with a high-temperature heat exchanger after that a condenser has a liquid refrigerant pipe which passes through a pump and connects with the evaporator, a compressor has a vapor channel connected with the high-temperature heat exchanger, the high-temperature heat exchanger has a vapor channel connected with an expander, the evaporator has a low-pressure vapor channel connected with the compressor and the condenser respectively after that the expander has a low-pressure vapor channel connected with the evaporator. The high-temperature heat exchanger has the heat source medium channel connected with the outside, the condenser has the cooling medium channel connected with the outside, or the evaporator has the heat source medium channel connected with the outside, or the expander connects with with the compressor and transmits power. The expander connects with with the compressor and the pump and transmits power. 
     2. A combined cycle power device comprising a compressor, an expander, a pump, a high-temperature heat exchanger, a condenser, an evaporator and a heating unit. an evaporator has a vapor channel connected with a high-temperature heat exchanger after that a condenser has a liquid refrigerant pipe which passes through a pump and connects with the evaporator, a compressor has a vapor channel connected with the high-temperature heat exchanger, the high-temperature heat exchanger has a vapor channel connected with an expander, a heating unit has a low-pressure vapor channel connected with the compressor and the condenser respectively after that the expander has a low-pressure vapor channel connected with the heating unit. The high-temperature heat exchanger has the heat source medium channel connected with the outside, the condenser has the cooling medium channel connected with the outside, the evaporator has the heat source medium channel connected with the outside, the heating unit has the heated medium channel connected with the outside, the expander connects with with the compressor and transmits power. Or the expander connects with with the compressor and the pump and transmits power. 
     3. A combined cycle power device comprising a compressor, an expander, a pump, a high-temperature heat exchanger, a condenser, an evaporator and a high-temperature regenerator. An evaporator has a vapor channel which passes through a high-temperature regenerator and connects with a high-temperature heat exchanger after that a condenser has a liquid refrigerant pipe which passes through a pump and connects with the evaporator, a compressor has a vapor channel which passes through the high-temperature regenerator and connects with the high-temperature heat exchanger, the high-temperature heat exchanger has a vapor channel connected with an expander, the expander has a low-pressure vapor channel connected with the high-temperature regenerator, the evaporator has a low-pressure vapor channel connected with the compressor and the condenser respectively after that the high-temperature regenerator has a low-pressure vapor channel connected with the evaporator. The high-temperature heat exchanger has the heat source medium channel connected with the outside, the condenser has the cooling medium channel connected with the outside, or the evaporator has the heat source medium channel connected with the outside, the expander connects with with the compressor and transmits power. Or the expander connects with with the compressor and the pump and transmits power. 
     4. A combined cycle power device comprising a compressor, an expander, a pump, a high-temperature heat exchanger, a condenser, an evaporator and the second high-temperature heat exchanger. An evaporator has a vapor channel connects with the second high-temperature heat exchanger after that a condenser has a liquid refrigerant pipe which passes through a pump and connects with the evaporator, the second high-temperature heat exchanger has a vapor channel connects with an expander, a compressor has a vapor channel connects with the high-temperature heat exchanger, the high-temperature heat exchanger has a vapor channel which passes through a intermediate vapor inlet channel and connects with the expander, the evaporator has a low-pressure vapor channel connected with the compressor and the condenser respectively after that the expander has a low-pressure vapor channel connected with the evaporator. The high-temperature heat exchanger and the high-temperature heat exchanger have the heat source medium channels connected with the outside, the condenser has the cooling medium channel connected with the outside, or the evaporator has the heat source medium channel connected with the outside, the expander connects with with the compressor and transmits power. Or the expander connects with with the compressor and the pump and transmits power. 
     5. A combined cycle power device comprising a compressor, an expander, a pump, a high-temperature heat exchanger, a condenser and an evaporator. An evaporator has a vapor channel which passes through a intermediate vapor inlet channel and connects with an expander after that a condenser has a liquid refrigerant pipe which passes through a pump and connects with the evaporator, a compressor has a vapor channel which passes through a high-temperature heat exchanger and connects with the expander, the evaporator has a low-pressure vapor channel connected with the compressor and the condenser respectively after that the expander has a low-pressure vapor channel connected with the evaporator. The high-temperature heat exchanger has the heat source medium channel connected with the outside, the condenser has the cooling medium channel connected with the outside, or the evaporator has the heat source medium channel connected with the outside, the expander connects with with the compressor and transmits power. Or the expander connects with with the compressor and the pump and transmits power. 
     6. A combined cycle power device comprising a compressor, an expander, a pump, a high-temperature heat exchanger, a condenser, an evaporator and a high-temperature regenerator. An evaporator has a vapor channel which passes through a intermediate vapor inlet channel and connects with an expander after that a condenser has a liquid refrigerant pipe which passes through a pump and connects with the evaporator, a compressor has a vapor channel which passes through a high-temperature regenerator and a high-temperature heat exchanger and connects with the expander, the expander has a low-pressure vapor channel connected with the high-temperature regenerator, the evaporator has a low-pressure vapor channel connected with the compressor and the condenser respectively after that the high-temperature regenerator has a low-pressure vapor channel connected with the evaporator. The high-temperature heat exchanger has the heat source medium channel connected with the outside, the condenser has the cooling medium channel connected with the outside, or the evaporator has the heat source medium channel connected with the outside, the expander connects with with the compressor and transmits power. Or the expander connects with with the compressor and the pump and transmits power. 
     7. A combined cycle power device comprising a compressor, an expander, a pump, a high-temperature heat exchanger, a condenser, an evaporator and the second expander. An evaporator has a vapor channel connected with the second expander after that a condenser has a liquid refrigerant pipe which passes through a pump and connects with the evaporator, the second expander has a vapor channel connected with the evaporator, a compressor has a vapor channel which passes through a high-temperature heat exchanger and connects with the expander, the expander has a low-pressure vapor channel connected with the evaporator, the evaporator has a low-pressure vapor channel connected with the compressor and the condenser respectively. The high-temperature heat exchanger has the heat source medium channel connected with the outside, the condenser has the cooling medium channel connected with the outside, or the evaporator has the heat source medium channel connected with the outside, the expander and the second expander connect with the compressor and transmits power. Or the expander and the second expander connect with the compressor and the pump and transmits power. 
     8. A combined cycle power device comprising a compressor, an expander, a pump, a high-temperature heat exchanger, a condenser, an evaporator and a heating unit. an evaporator has a vapor channel connects with a high-temperature heat exchanger after that a condenser has a liquid refrigerant pipe which passes through a pump and connects with the evaporator, a compressor has a vapor channel connects with the high-temperature heat exchanger, the high-temperature heat exchanger has a vapor channel connected with the expander, the evaporator has a low-pressure vapor channel connected with a heating unit after that the expander has a low-pressure vapor channel connected with the evaporator, the heating unit has a low-pressure vapor channel connected with the compressor and the condenser respectively. The high-temperature heat exchanger has the heat source medium channel connected with the outside, the condenser has the cooling medium channel connected with the outside, or the evaporator has the heat source medium channel connected with the outside, the heating unit has the heated medium channel connected with the outside, the expander connects with with the compressor and transmits power. Or the expander connects with with the compressor and the pump and transmits power. 
     9. A combined cycle power device comprising a compressor, an expander, a pump, a high-temperature heat exchanger, a condenser, an evaporator, the second high-temperature heat exchanger and the second compressor. An evaporator has a vapor channel connects with a high-temperature heat exchanger after that a condenser has a liquid refrigerant pipe which passes through a pump and connects with the evaporator, a compressor has a vapor channel connects with the high-temperature heat exchanger, the high-temperature heat exchanger has a vapor channel connected with the second compressor, the second compressor has a vapor channel which passes through the second high-temperature heat exchanger and connects with the expander, the evaporator has a low-pressure vapor channel connected with the compressor and the condenser respectively after that the expander has a low-pressure vapor channel connected with the evaporator. The high-temperature heat exchanger and the second high-temperature heat exchanger have the heat source medium channels connected with the outside, the condenser has the cooling medium channel connected with the outside, or the evaporator has the heat source medium channel connected with the outside, the expander connects with with the compressor and the second compressor and transmits power. Or the expander connects with with the compressor, the pump and the second compressor and transmits power. 
     10. A combined cycle power device comprising a compressor, an expander, a pump, a high-temperature heat exchanger, a condenser, an evaporator, the second high-temperature heat exchanger and the second expander. An evaporator has a vapor channel connects with a high-temperature heat exchanger after that a condenser has a liquid refrigerant pipe which passes through a pump and connects with the evaporator, a compressor has a vapor channel connects with the high-temperature heat exchanger, the high-temperature heat exchanger has a vapor channel connected with the second expander, the second expander has a vapor channel which passes through the second high-temperature heat exchanger and connects with the expander, the evaporator has a low-pressure vapor channel connected with the compressor and the condenser respectively after that the expander has a low-pressure vapor channel connected with the evaporator. The high-temperature heat exchanger and the second high-temperature heat exchanger have the heat source medium channels connected with the outside, the condenser has the cooling medium channel connected with the outside, or the evaporator has the heat source medium channel connected with the outside, the expander and the second expander connect with the compressor and transmits power. Or the expander and the second expander connect with the compressor and the pump and transmits power. 
     11. A combined cycle power device comprising a compressor, an expander, a pump, a high-temperature heat exchanger, a condenser, an evaporator, a high-temperature regenerator, the second high-temperature heat exchanger and the second compressor. An evaporator has a vapor channel which passes through a high-temperature regenerator and connects with a high-temperature heat exchanger after that a condenser has a liquid refrigerant pipe which passes through a pump and connects with the evaporator, a compressor has a vapor channel which passes through a high-temperature regenerator and connects with a high-temperature heat exchanger, the high-temperature heat exchanger has a vapor channel connected with the second compressor, the second compressor has a vapor channel which passes through the second high-temperature heat exchanger and connects with the expander, the evaporator has a low-pressure vapor channel connected with the compressor and the condenser respectively after that the expander has a low-pressure vapor channel which passes through a high-temperature regenerator and connects with the evaporator. The high-temperature heat exchanger and the second high-temperature heat exchanger have the heat source medium channels connected with the outside, the condenser has the cooling medium channel connected with the outside, or the evaporator has the heat source medium channel connected with the outside, the expander connects with with the compressor and the second compressor and transmits power. Or the expander connects with with the compressor, the second compressor and the pump and transmits power. 
     12. A combined cycle power device comprising a compressor, an expander, a pump, a high-temperature heat exchanger, a condenser, an evaporator, a high-temperature regenerator, the second high-temperature heat exchanger and the second expander. An evaporator has a vapor channel which passes through a high-temperature regenerator and connects with a high-temperature heat exchanger after that a condenser has a liquid refrigerant pipe which passes through a pump and connects with the evaporator, a compressor has a vapor channel which passes through a high-temperature regenerator and connects with a high-temperature heat exchanger, the high-temperature heat exchanger has a vapor channel connected with the second expander, the second expander has a vapor channel which passes through the second high-temperature heat exchanger and connects with the expander, the evaporator has a low-pressure vapor channel connected with the compressor and the condenser respectively after that the expander has a low-pressure vapor channel which passes through a high-temperature regenerator and connects with the evaporator. The high-temperature heat exchanger and the second high-temperature heat exchanger have the heat source medium channels connected with the outside, the condenser has the cooling medium channel connected with the outside, or the evaporator has the heat source medium channel connected with the outside, the expander and the second expander connect with the compressor and transmits power. Or the expander and the second expander connect with the compressor and the pump and transmits power. 
     13. The device according to any one of claim  1 - 12 , wherein adding the low temperature regenerator and the second pump, adjusting that the condenser has a liquid refrigerant pipe which passes through a pump and connects with the evaporator to that the condenser has a liquid refrigerant pipe which passes through a pump and connects with a low temperature regenerator, the compressor adds the vapor extraction channel connected with the low temperature regenerator, the low temperature regenerator has a liquid refrigerant pipe which passes through the second pump and connects with the evaporator, a combined cycle power device is formed. 
    
    
     
       BRIEF DESCRIPTION OF THE FIGURES 
         FIG. 1  is a type 1 example general flow chart of a combined cycle power device provided in the present invention. 
         FIG. 2  is a type 2 example general flow chart of a combined cycle power device provided in the present invention. 
         FIG. 3  is a type 3 example general flow chart of a combined cycle power device provided in the present invention. 
         FIG. 4  is a type 4 example general flow chart of a combined cycle power device provided in the present invention. 
         FIG. 5  is a type 5 example general flow chart of a combined cycle power device provided in the present invention. 
         FIG. 6  is a type 6 example general flow chart of a combined cycle power device provided in the present invention. 
         FIG. 7  is a type 7 example general flow chart of a combined cycle power device provided in the present invention. 
         FIG. 8  is a type 8 example general flow chart of a combined cycle power device provided in the present invention. 
         FIG. 9  is a type 9 example general flow chart of a combined cycle power device provided in the present invention. 
         FIG. 10  is a type 10 example general flow chart of a combined cycle power device provided in the present invention. 
         FIG. 11  is a type 11 example general flow chart of a combined cycle power device provided in the present invention. 
         FIG. 12  is a type 12 example general flow chart of a combined cycle power device provided in the present invention. 
         FIG. 13  is a type 13 example general flow chart of a combined cycle power device provided in the present invention. 
         FIG. 14  is a type 14 example general flow chart of a combined cycle power device provided in the present invention. 
         FIG. 15  is a type 15 example general flow chart of a combined cycle power device provided in the present invention. 
     
    
    
     In the figures,  1 —compressor,  2 —expander,  3 —circulating pump,  4 —high temperature heat exchanger,  5 —condenser,  6 —evaporator (waste heat boiler),  7 —heating unit,  8 —high temperature regenerator,  9 —the second high—temperature heat exchanger,  10 —the second expander,  11 —the second compressor,  12 —low temperature regenerator,  13 —the second pump. 
     DETAILED DESCRIPTION 
     The first thing to note is that, when describing the cycle&#39;s structures and processes, the processes will not be repeatedly described if not necessary, and the obvious processes will not be described. The detailed description of the present invention is as follows: 
     The combined cycle power device in  FIG. 1  works as follows: 
     (1) Device structure. The combined cycle power device comprises a compressor, an expander, a pump, a high-temperature heat exchanger, a condenser and an evaporator. An evaporator  6  has a vapor channel connected with a high-temperature heat exchanger  4  after that a condenser  5  has a liquid refrigerant pipe which passes through a pump  3  and connects with the evaporator  6 , a compressor  1  has a vapor channel connected with the high-temperature heat exchanger  4 , the high-temperature heat exchanger  4  has a vapor channel connected with an expander  2 , the evaporator  6  has a low-pressure vapor channel connected with the compressor  1  and the condenser  5  respectively after that the expander  2  has a low-pressure vapor channel connected with the evaporator  6 . The high-temperature heat exchanger  4  has the heat source medium channel connected with the outside, the condenser  5  has the cooling medium channel connected with the outside. The expander  2  connects with with the compressor  1  and transmits power. 
     (2) Working processes. The condensate of the condenser  5  flows through the pump  3  and enters into the evaporator  6  in which it absorbs heat, vaporizes and superheats, and then enters the high-temperature heat exchanger  4  for heat absorption. The vapor discharged from compressor  1  enters the high-temperature heat exchanger  4  for heat absorption. The vapor discharged from the high-temperature heat exchanger  4  flows through the expander  2  to depressurize and output work. The low-pressure vapor discharged from the expander  2  flows through the evaporator  6  to release heat and cool down, and then is divided into two currents. The first current enters the compressor  1  for pressure rise and temperature rise. The second current enters the condenser  5  to release heat and condense. The heat source medium supplies the driving heat load through the high-temperature heat exchanger  4 . The cooling medium takes away the low-temperature heat load through the condenser  5 . The expander  2  supplies power to the compressor  1  and the outside. Or the expander  2  supplies power to the compressor  1 , the pump  3  and the outside. The combined cycle power device is formed. 
     The combined cycle power device in  FIG. 2  works as follows: 
     Based on combined cycle power device in  FIG. 1 , the evaporator  6  adds the heat source medium channel connected with with the outside. The condensate entering the evaporator  6  obtains the heat load provided by the low-pressure vapor and the heat source medium at the same time, heats up, vaporizes and superheats, and then enters the high-temperature heat exchanger  4 . The combined cycle power device is formed. 
     The combined cycle power device in  FIG. 3  works as follows: 
     (1) Device structure. The combined cycle power device comprises a compressor, an expander, a pump, a high-temperature heat exchanger, a condenser, an evaporator and a heating unit. an evaporator  6  has a vapor channel connected with a high-temperature heat exchanger  4  after that a condenser  5  has a liquid refrigerant pipe which passes through a pump  3  and connects with the evaporator  6 , a compressor  1  has a vapor channel connected with the high-temperature heat exchanger  4 , the high-temperature heat exchanger  4  has a vapor channel connected with an expander  2 , a heating unit  7  has a low-pressure vapor channel connected with the compressor  1  and the condenser  5  respectively after that the expander  2  has a low-pressure vapor channel connected with the heating unit  7 . The high-temperature heat exchanger  4  has the heat source medium channel connected with the outside, the condenser  5  has the cooling medium channel connected with the outside, the evaporator  6  has the heat source medium channel connected with the outside, the heating unit  7  has the heated medium channel connected with the outside, the expander  2  connects with with the compressor  1  and transmits power. 
     (2) Working processes. The condensate of the condenser  5  flows through the pump  3  and enters into the evaporator  6  in which it absorbs heat, vaporizes and superheats, and then enters the high-temperature heat exchanger  4  for heat absorption. The vapor discharged from compressor  1  enters the high-temperature heat exchanger  4  for heat absorption. The vapor discharged from the high-temperature heat exchanger  4  flows through the expander  2  to depressurize and output work. The low-pressure vapor discharged from the expander  2  flows through the heating unit  7  to release heat and cool down, and then is divided into two currents. The first current enters the compressor  1  for pressure rise and temperature rise. The second current enters the condenser  5  to release heat and condense. The heat source medium supplies the driving heat load through the high-temperature heat exchanger  4  and the evaporator  6 . The cooling medium takes away the low-temperature heat load through the condenser  5 . The heated medium takes away the medium temperature heat load through the heating unit  7 . The expander  2  supplies power to the compressor  1  and the outside. Or the expander  2  supplies power to the compressor  1 , the pump  3  and the outside. The combined cycle power device is formed. 
     The combined cycle power device in  FIG. 4  works as follows: 
     (1) Device structure. The combined cycle power device comprises a compressor, an expander, a pump, a high-temperature heat exchanger, a condenser, an evaporator and a high-temperature regenerator. An evaporator  6  has a vapor channel which passes through a high-temperature regenerator  8  and connects with a high-temperature heat exchanger  4  after that a condenser  5  has a liquid refrigerant pipe which passes through a pump  3  and connects with the evaporator  6 , a compressor  1  has a vapor channel which passes through the high-temperature regenerator  8  and connects with the high-temperature heat exchanger  4 , the high-temperature heat exchanger  4  has a vapor channel connected with an expander  2 , the expander  2  has a low-pressure vapor channel connected with the high-temperature regenerator  8 , the evaporator  6  has a low-pressure vapor channel connected with the compressor  1  and the condenser  5  respectively after that the high-temperature regenerator  8  has a low-pressure vapor channel connected with the evaporator  6 . The high-temperature heat exchanger  4  has the heat source medium channel connected with the outside, the condenser  5  has the cooling medium channel connected with the outside, the expander  2  connects with with the compressor  1  and transmits power. 
     (2) Working processes. The condensate of the condenser  5  flows through the pump  3  and enters into the evaporator  6  in which it absorbs heat, vaporizes and superheats. The superheated vapor flows through the high-temperature regenerator  8  for heat absorption, and then enters the high-temperature heat exchanger  4  for heat absorption. The vapor discharged from compressor  1  flows through the high-temperature regenerator  8  for heat absorption, and then enters the high-temperature heat exchanger  4  for heat absorption. The vapor discharged from the high-temperature heat exchanger  4  flows through the expander  2  to depressurize and output work. The low-pressure vapor discharged from the expander  2  flows through the high-temperature regenerator  8  and the evaporator  6  to release heat and cool down, and then is divided into two currents. The first current enters the compressor  1  for pressure rise and temperature rise. The second current enters the condenser  5  to release heat and condense. The heat source medium supplies the driving heat load through the high-temperature heat exchanger  4 . The cooling medium takes away the low-temperature heat load through the condenser  5 . The expander  2  supplies power to the compressor  1  and the outside. Or the expander  2  supplies power to the compressor  1 , the pump  3  and the outside. The combined cycle power device is formed. 
     The combined cycle power device in  FIG. 5  works as follows: 
     (1) Device structure. The combined cycle power device comprises a compressor, an expander, a pump, a high-temperature heat exchanger, a condenser, an evaporator and the second high-temperature heat exchanger. An evaporator  6  has a vapor channel connects with the second high-temperature heat exchanger  9  after that a condenser  5  has a liquid refrigerant pipe which passes through a pump  3  and connects with the evaporator  6 , the second high-temperature heat exchanger  9  has a vapor channel connects with an expander  2 , a compressor  1  has a vapor channel connects with the high-temperature heat exchanger  4 , the high-temperature heat exchanger  4  has a vapor channel which passes through a intermediate vapor inlet channel and connects with the expander  2 , the evaporator  6  has a low-pressure vapor channel connected with the compressor  1  and the condenser  5  respectively after that the expander  2  has a low-pressure vapor channel connected with the evaporator  6 . The high-temperature heat exchanger  4  and the high-temperature heat exchanger  9  have the heat source medium channels connected with the outside, the condenser  5  has the cooling medium channel connected with the outside, the expander  2  connects with with the compressor  1  and transmits power. 
     (2) Working processes. The condensate of the condenser  5  flows through the pump  3 , the evaporator  6  and the second high-temperature heat exchanger  9  and absorbs heat, vaporizes and superheats, and then enters the expander  2  to depressurize and output work. The vapor discharged from compressor  1  flows through the high-temperature heat exchanger  4  for heat absorption, and then enters the expander  2  to depressurize and output work. The low-pressure vapor discharged from the expander  2  flows through the evaporator  6  to release heat and cool down, and then is divided into two currents. The first current enters the compressor  1  for pressure rise and temperature rise. The second current enters the condenser  5  to release heat and condense. The heat source medium supplies the driving heat load through the high-temperature heat exchanger  4  and the second high-temperature heat exchanger  9 . The cooling medium takes away the low-temperature heat load through the condenser  5 . The expander  2  supplies power to the compressor  1  and the outside. Or the expander  2  supplies power to the compressor  1 , the pump  3  and the outside. The combined cycle power device is formed. 
     The combined cycle power device in  FIG. 6  works as follows: 
     (1) Device structure. The combined cycle power device comprises a compressor, an expander, a pump, a high-temperature heat exchanger, a condenser and an evaporator. An evaporator  6  has a vapor channel which passes through a intermediate vapor inlet channel and connects with an expander  2  after that a condenser  5  has a liquid refrigerant pipe which passes through a pump  3  and connects with the evaporator  6 , a compressor  1  has a vapor channel which passes through a high-temperature heat exchanger  4  and connects with the expander  2 , the evaporator  6  has a low-pressure vapor channel connected with the compressor  1  and the condenser  5  respectively after that the expander  2  has a low-pressure vapor channel connected with the evaporator  6 . The high-temperature heat exchanger  4  has the heat source medium channel connected with the outside, the condenser  5  has the cooling medium channel connected with the outside, the expander  2  connects with with the compressor  1  and transmits power. 
     (2) Working processes. The condensate of the condenser  5  flows through the pump  3  and enters the evaporator  6  in which it absorbs heat, vaporizes and superheats, and then enters the expander  2  to depressurize and output work. The vapor discharged from compressor  1  flows through the high-temperature heat exchanger  4  for heat absorption, and then enters the expander  2  to depressurize and output work. The low-pressure vapor discharged from the expander  2  flows through the evaporator  6  to release heat and cool down, and then is divided into two currents. The first current enters the compressor  1  for pressure rise and temperature rise. The second current enters the condenser  5  to release heat and condense. The heat source medium supplies the driving heat load through the high-temperature heat exchanger  4 . The cooling medium takes away the low-temperature heat load through the condenser  5 . The expander  2  supplies power to the compressor  1  and the outside. Or the expander  2  supplies power to the compressor  1 , the pump  3  and the outside. The combined cycle power device is formed. 
     The combined cycle power device in  FIG. 7  works as follows: 
     (1) Device structure. The combined cycle power device comprises a compressor, an expander, a pump, a high-temperature heat exchanger, a condenser, an evaporator and a high-temperature regenerator. An evaporator  6  has a vapor channel which passes through a intermediate vapor inlet channel and connects with an expander  2  after that a condenser  5  has a liquid refrigerant pipe which passes through a pump  3  and connects with the evaporator  6 , a compressor  1  has a vapor channel which passes through a high-temperature regenerator  8  and a high-temperature heat exchanger  4  and connects with the expander  2 , the expander  2  has a low-pressure vapor channel connected with the high-temperature regenerator  8 , the evaporator  6  has a low-pressure vapor channel connected with the compressor  1  and the condenser  5  respectively after that the high-temperature regenerator  8  has a low-pressure vapor channel connected with the evaporator  6 . The high-temperature heat exchanger  4  has the heat source medium channel connected with the outside, the condenser  5  has the cooling medium channel connected with the outside, the expander  2  connects with with the compressor  1  and transmits power. 
     (2) Working processes. The condensate of the condenser  5  flows through the pump  3  and enters the evaporator  6  in which it absorbs heat, vaporizes and superheats, and then enters the expander  2  to depressurize and output work. The vapor discharged from compressor  1  flows through the high-temperature regenerator  8  and the high-temperature heat exchanger  4  for heat absorption, and then enters the expander  2  to depressurize and output work. The low-pressure vapor discharged from the expander  2  flows through the high-temperature regenerator  8  and the evaporator  6  to release heat and cool down, and then is divided into two currents. The first current enters the compressor  1  for pressure rise and temperature rise. The second current enters the condenser  5  to release heat and condense. The heat source medium supplies the driving heat load through the high-temperature heat exchanger  4 . The cooling medium takes away the low-temperature heat load through the condenser  5 . The expander  2  supplies power to the compressor  1  and the outside. Or the expander  2  supplies power to the compressor  1 , the pump  3  and the outside. The combined cycle power device is formed. 
     The combined cycle power device in  FIG. 8  works as follows: 
     (1) Device structure. The combined cycle power device comprises a compressor, an expander, a pump, a high-temperature heat exchanger, a condenser, an evaporator and the second expander. An evaporator  6  has a vapor channel connected with the second expander  10  after that a condenser  5  has a liquid refrigerant pipe which passes through a pump  3  and connects with the evaporator  6 , the second expander  10  has a vapor channel connected with the evaporator  6 , a compressor  1  has a vapor channel which passes through a high-temperature heat exchanger  4  and connects with the expander  2 , the expander  2  has a low-pressure vapor channel connected with the evaporator  6 , the evaporator  6  has a low-pressure vapor channel connected with the compressor  1  and the condenser  5  respectively. The high-temperature heat exchanger  4  has the heat source medium channel connected with the outside, the condenser  5  has the cooling medium channel connected with the outside, the evaporator  6  has the heat source medium channel connected with the outside, the expander  2  and the second expander  10  connect with the compressor  1  and transmits power. 
     (2) Working processes. The condensate of the condenser  5  flows through the pump  3  and enters the evaporator  6  in which it absorbs heat, vaporizes and superheats, and then enters the second expander  10  to depressurize and output work. The low-pressure vapor discharged from the second expander  10  enters the evaporator  6  to release heat and cool down. The vapor discharged from the compressor  1  flows through the high-temperature heat exchanger  4  for heat absorption, and then enters the expander  2  to depressurize and output work. The low-pressure vapor discharged from the expander  2  enters the evaporator  6  to release heat and cool down, and then is divided into two currents. The first current enters the compressor  1  for pressure rise and temperature rise. The second current enters the condenser  5  to release heat and condense. The heat source medium supplies the driving heat load through the high-temperature heat exchanger  4  and the evaporator  6 . The cooling medium takes away the low-temperature heat load through the condenser  5 . The expander  2  and the second expander  10  supplies power to the compressor  1  and the outside. Or the expander  2  and the second expander  10  supplies power to the compressor  1 , the pump  3  and the outside. The combined cycle power device is formed. 
     The combined cycle power device in  FIG. 9  works as follows: 
     (1) Device structure. The combined cycle power device comprises a compressor, an expander, a pump, a high-temperature heat exchanger, a condenser, an evaporator and a heating unit. an evaporator  6  has a vapor channel connects with a high-temperature heat exchanger  4  after that a condenser  5  has a liquid refrigerant pipe which passes through a pump  3  and connects with the evaporator  6 , a compressor  1  has a vapor channel connects with the high-temperature heat exchanger  4 , the high-temperature heat exchanger  4  has a vapor channel connected with the expander  2 , the evaporator  6  has a low-pressure vapor channel connected with a heating unit  7  after that the expander  2  has a low-pressure vapor channel connected with the evaporator  6 , the heating unit  7  has a low-pressure vapor channel connected with the compressor  1  and the condenser  5  respectively. The high-temperature heat exchanger  4  has the heat source medium channel connected with the outside, the condenser  5  has the cooling medium channel connected with the outside, the heating unit  7  has the heated medium channel connected with the outside, the expander  2  connects with with the compressor  1  and transmits power. 
     (2) Working processes. The condensate of the condenser  5  flows through the pump  3  and enters the evaporator  6  in which it absorbs heat, vaporizes and superheats, and then enters the high-temperature heat exchanger  4  for heat absorption. The vapor discharged from compressor  1  enters the high-temperature heat exchanger  4  for heat absorption. The vapor discharged from the high-temperature heat exchanger  4  flows through the expander  2  to depressurize and output work. The low-pressure vapor discharged from the expander  2  flows through the evaporator  6  and heating unit  7  to release heat and cool down, and then is divided into two currents. The first current enters the compressor  1  for pressure rise and temperature rise. The second current enters the condenser  5  to release heat and condense. The heat source medium supplies the driving heat load through the high-temperature heat exchanger  4 . The cooling medium takes away the low-temperature heat load through the condenser  5 . The heated medium takes away the medium temperature heat load through the heating unit  7 . The expander  2  supplies power to the compressor  1  and the outside. Or the expander  2  supplies power to the compressor  1 , the pump  3  and the outside. The combined cycle power device is formed. 
     The combined cycle power device in  FIG. 10  works as follows: 
     (1) Device structure. The combined cycle power device comprises a compressor, an expander, a pump, a high-temperature heat exchanger, a condenser, an evaporator, the second high-temperature heat exchanger and the second compressor. An evaporator  6  has a vapor channel connects with a high-temperature heat exchanger  4  after that a condenser  5  has a liquid refrigerant pipe which passes through a pump  3  and connects with the evaporator  6 , a compressor  1  has a vapor channel connects with the high-temperature heat exchanger  4 , the high-temperature heat exchanger  4  has a vapor channel connected with the second compressor  11 , the second compressor  11  has a vapor channel which passes through the second high-temperature heat exchanger  9  and connects with the expander  2 , the evaporator  6  has a low-pressure vapor channel connected with the compressor  1  and the condenser  5  respectively after that the expander  2  has a low-pressure vapor channel connected with the evaporator  6 . The high-temperature heat exchanger  4  and the second high-temperature heat exchanger  9  have the heat source medium channels connected with the outside, the condenser  5  has the cooling medium channel connected with the outside, the expander  2  connects with with the compressor  1  and the second compressor  11  and transmits power. 
     (2) Working processes. The condensate of the condenser  5  flows through the pump  3  and enters the evaporator  6  in which it absorbs heat, vaporizes and superheats, and then enters the high-temperature heat exchanger  4  for heat absorption. The vapor discharged from compressor  1  enters the high-temperature heat exchanger  4  for heat absorption. The vapor discharged from the high-temperature heat exchanger  4  flows through the second compressor  11  to pressurize, the second high-temperature heat exchanger  9  for heat absorption and the expander  2  to depressurize and output work. The low-pressure vapor discharged from the expander  2  flows through the evaporator  6  to release heat and cool down, and then is divided into two currents. The first current enters the compressor  1  for pressure rise and temperature rise. The second current enters the condenser  5  to release heat and condense. The heat source medium supplies the driving heat load through the high-temperature heat exchanger  4  and the second high-temperature heat exchanger  9 . The cooling medium takes away the low-temperature heat load through the condenser  5 . The expander  2  supplies power to the compressor  1 , the second compressor  11  and the outside. Or he expander  2  supplies power to the compressor  1 , the pump  3 , the second compressor  11  and the outside. The combined cycle power device is formed. 
     The combined cycle power device in  FIG. 11  works as follows: 
     (1) Device structure. The combined cycle power device comprises a compressor, an expander, a pump, a high-temperature heat exchanger, a condenser, an evaporator, the second high-temperature heat exchanger and the second expander. An evaporator  6  has a vapor channel connects with a high-temperature heat exchanger  4  after that a condenser  5  has a liquid refrigerant pipe which passes through a pump  3  and connects with the evaporator  6 , a compressor  1  has a vapor channel connects with the high-temperature heat exchanger  4 , the high-temperature heat exchanger  4  has a vapor channel connected with the second expander  10 , the second expander  10  has a vapor channel which passes through the second high-temperature heat exchanger  9  and connects with the expander  2 , the evaporator  6  has a low-pressure vapor channel connected with the compressor  1  and the condenser  5  respectively after that the expander  2  has a low-pressure vapor channel connected with the evaporator  6 . The high-temperature heat exchanger  4  and the second high-temperature heat exchanger  9  have the heat source medium channels connected with the outside, the condenser  5  has the cooling medium channel connected with the outside, the expander  2  and the second expander  10  connect with the compressor  1  and transmits power. 
     (2) Working processes. The condensate of the condenser  5  flows through the pump  3  and enters the evaporator  6  in which it absorbs heat, vaporizes and superheats, and then enters the high-temperature heat exchanger  4  for heat absorption. The vapor discharged from compressor  1  enters the high-temperature heat exchanger  4  for heat absorption. The vapor discharged from the high-temperature heat exchanger  4  flows through the second expander  10  to depressurize and output work, the second high-temperature heat exchanger  9  for heat absorption and the expander  2  to depressurize and output work. The low-pressure vapor discharged from the expander  2  flows through the evaporator  6  to release heat and cool down, and then is divided into two currents. The first current enters the compressor  1  for pressure rise and temperature rise. The second current enters the condenser  5  to release heat and condense. The heat source medium supplies the driving heat load through the high-temperature heat exchanger  4  and the second high-temperature heat exchanger  9 . The cooling medium takes away the low-temperature heat load through the condenser  5 . The expander  2  and the second expander  10  supplies power to the compressor  1  and the outside. Or the expander  2  and the second expander  10  supplies power to the compressor  1 , the pump  3  and the outside. The combined cycle power device is formed. 
     The combined cycle power device in  FIG. 12  works as follows: 
     (1) Device structure. The combined cycle power device comprises a compressor, an expander, a pump, a high-temperature heat exchanger, a condenser, an evaporator, a high-temperature regenerator, the second high-temperature heat exchanger and the second compressor. An evaporator  6  has a vapor channel which passes through a high-temperature regenerator  8  and connects with a high-temperature heat exchanger  4  after that a condenser  5  has a liquid refrigerant pipe which passes through a pump  3  and connects with the evaporator  6 , a compressor  1  has a vapor channel which passes through a high-temperature regenerator  8  and connects with a high-temperature heat exchanger  4 , the high-temperature heat exchanger  4  has a vapor channel connected with the second compressor  11 , the second compressor  11  has a vapor channel which passes through the second high-temperature heat exchanger  9  and connects with the expander  2 , the evaporator  6  has a low-pressure vapor channel connected with the compressor  1  and the condenser  5  respectively after that the expander  2  has a low-pressure vapor channel which passes through a high-temperature regenerator  8  and connects with the evaporator  6 . The high-temperature heat exchanger  4  and the second high-temperature heat exchanger  9  have the heat source medium channels connected with the outside, the condenser  5  has the cooling medium channel connected with the outside, the expander  2  connects with with the compressor  1  and the second compressor  11  and transmits power. 
     (2) Working processes. The condensate of the condenser  5  flows through the pump  3  and enters the evaporator  6  in which it absorbs heat, vaporizes and superheats. The superheated vapor flows through the high-temperature regenerator  8  for heat absorption, and then enters the high-temperature heat exchanger  4  for heat absorption. The vapor discharged from compressor  1  flows through the high-temperature regenerator  8  for heat absorption, and then enters the high-temperature heat exchanger  4  for heat absorption. The vapor discharged from the high-temperature heat exchanger  4  flows through the second compressor  11  to pressurize, the second high-temperature heat exchanger  9  for heat absorption and the expander  2  to depressurize and output work. The low-pressure vapor discharged from the expander  2  flows through the high-temperature regenerator  8  and the evaporator  6  to release heat and cool down, and then is divided into two currents. The first current enters the compressor  1  for pressure rise and temperature rise. The second current enters the condenser  5  to release heat and condense. The heat source medium supplies the driving heat load through the high-temperature heat exchanger  4  and the second high-temperature heat exchanger  9 . The cooling medium takes away the low-temperature heat load through the condenser  5 . The expander  2  supplies power to the compressor  1 , the second compressor  11  and the outside. Or the expander  2  supplies power to the compressor  1 , the pump  3 , the second compressor  11  and the outside. The combined cycle power device is formed. 
     The combined cycle power device in  FIG. 13  works as follows: 
     (1) Device structure. The combined cycle power device comprises a compressor, an expander, a pump, a high-temperature heat exchanger, a condenser, an evaporator, a high-temperature regenerator, the second high-temperature heat exchanger and the second expander. An evaporator  6  has a vapor channel which passes through a high-temperature regenerator  8  and connects with a high-temperature heat exchanger  4  after that a condenser  5  has a liquid refrigerant pipe which passes through a pump  3  and connects with the evaporator  6 , a compressor  1  has a vapor channel which passes through a high-temperature regenerator  8  and connects with a high-temperature heat exchanger  4 , the high-temperature heat exchanger  4  has a vapor channel connected with the second expander  10 , the second expander  10  has a vapor channel which passes through the second high-temperature heat exchanger  9  and connects with the expander  2 , the evaporator  6  has a low-pressure vapor channel connected with the compressor  1  and the condenser  5  respectively after that the expander  2  has a low-pressure vapor channel which passes through a high-temperature regenerator  8  and connects with the evaporator  6 . The high-temperature heat exchanger  4  and the second high-temperature heat exchanger  9  have the heat source medium channels connected with the outside, the condenser  5  has the cooling medium channel connected with the outside, the expander  2  and the second expander  10  connect with the compressor  1  and transmits power. 
     (2) Working processes. The condensate of the condenser  5  flows through the pump  3  and enters the evaporator  6  in which it absorbs heat, vaporizes and superheats. The superheated vapor flows through the high-temperature regenerator  8  for heat absorption, and then enters the high-temperature heat exchanger  4  for heat absorption. The vapor discharged from compressor  1  flows through the high-temperature regenerator  8  for heat absorption, and then enters the high-temperature heat exchanger  4  for heat absorption. The vapor discharged from the high-temperature heat exchanger  4  flows through the second expander  10  to depressurize and output work, the second high-temperature heat exchanger  9  for heat absorption and the expander  2  to depressurize and output work. The low-pressure vapor discharged from the expander  2  flows through the high-temperature regenerator  8  and the evaporator  6  to release heat and cool down, and then is divided into two currents. The first current enters the compressor  1  for pressure rise and temperature rise. The second current enters the condenser  5  to release heat and condense. The heat source medium supplies the driving heat load through the high-temperature heat exchanger  4  and the second high-temperature heat exchanger  9 . The cooling medium takes away the low-temperature heat load through the condenser  5 . The expander  2  and the second expander  10  supplies power to the compressor  1  and the outside. Or the expander  2  and the second expander  10  supplies power to the compressor  1 , the pump  3  and the outside. The combined cycle power device is formed. 
     The combined cycle power device in  FIG. 14  works as follows: 
     (1) Structurally, based on combined cycle power device in  FIG. 1 , a low temperature regenerator and the second pump is added. That a condenser  5  has a liquid refrigerant pipe which passes through a pump  3  and connects with the evaporator  6  is adjusted for that a condenser  5  has a liquid refrigerant pipe which passes through a pump  3  and connects with a low temperature regenerator  12 . The low temperature regenerator  12  has a liquid refrigerant pipe which passes through the second pump  13  and connects with the evaporator  6 . The compressor  1  adds a vapor extraction channel connected with the low temperature regenerator  12 . 
     (2) Working processes. The condensate of the condenser  5  flows through the pump  3  and enters the low temperature regenerator  12  in which it mixes with the vapor extraction from the compressor  1  for heat absorption. The vapor extraction releases and is condensed. The condensate of the low temperature regenerator  12  flows through the second pump  13  and enters the evaporator  6  in which it absorbs heat, vaporizes and superheats, and then enters the high-temperature heat exchanger  4  for heat absorption. The vapor discharged from compressor  1  enters the high-temperature heat exchanger  4  for heat absorption. The vapor discharged from the high-temperature heat exchanger  4  flows through the expander  2  to depressurize and output work. The low-pressure vapor discharged from the expander  2  flows through the evaporator  6  to release heat and cool down, and then is divided into two currents. The first current enters the compressor  1  for pressure rise and temperature rise. The second current enters the condenser  5  to release heat and condense. The low-pressure vapor entering the compressor  1  is compressed to the certain extent and then divided into two currents. The first current enters the low temperature regenerator  12  by the intermediate extraction channel. The second current continues to boost pressure and temperature. The heat source medium supplies the driving heat load through the high-temperature heat exchanger  4 . The cooling medium takes away the low-temperature heat load through the condenser  5 . The expander  2  supplies power to the compressor  1  and the outside. Or the expander  2  supplies power to the compressor  1 , the pump  3 , the second pump  13  and the outside. The combined cycle power device is formed. 
     The combined cycle power device in  FIG. 15  works as follows: 
     (1) Structurally, based on combined cycle power device in  FIG. 3 , a low temperature regenerator and the second pump is added. That a condenser  5  has a liquid refrigerant pipe which passes through a pump  3  and connects with the evaporator  6  is adjusted for that a condenser  5  has a liquid refrigerant pipe which passes through a pump  3  and connects with a low temperature regenerator  12 . The low temperature regenerator  12  has a liquid refrigerant pipe which passes through the second pump  13  and connects with the evaporator  6 . The compressor  1  adds a vapor extraction channel connected with the low temperature regenerator  12 . 
     (2) Working processes. The condensate of the condenser  5  flows through the pump  3  and enters the low temperature regenerator  12  in which it mixes with the vapor extraction from the compressor  1  for heat absorption. The vapor extraction releases and is condensed. The condensate of the low temperature regenerator  12  flows through the second pump  13  and enters the evaporator  6  in which it absorbs heat, vaporizes and superheats, and then enters the high-temperature heat exchanger  4  for heat absorption. The vapor discharged from compressor  1  enters the high-temperature heat exchanger  4  for heat absorption. The vapor discharged from the high-temperature heat exchanger  4  flows through the expander  2  to depressurize and output work. The low-pressure vapor discharged from the expander  2  flows through the heating unit  7  to release heat and cool down, and then is divided into two currents. The first current enters the compressor  1  for pressure rise and temperature rise. The second current enters the condenser  5  to release heat and condense. The low-pressure vapor entering the compressor  1  is compressed to the certain extent and then divided into two currents. The first current enters the low temperature regenerator  12  by the intermediate extraction channel. The second current continues to boost pressure and temperature. The heat source medium supplies the driving heat load through the high-temperature heat exchanger  4  and the evaporator  6 . The cooling medium takes away the low-temperature heat load through the condenser  5 . The heated medium takes away the medium temperature heat load through the heating unit  7 . The expander  2  supplies power to the compressor  1  and the outside. Or the expander  2  supplies power to the compressor  1 , the pump  3 , the second pump  13  and the outside. The combined cycle power device is formed. 
     The technical effects of the present invention invention: the combined cycle power device proposed by the present invention has the following effects and advantages: 
     (1) The circulating working medium absorbs heat at high-temperature heat under low pressure. The temperature difference loss between the circulating working medium and the high-temperature heat source is small, which is conducive to improving the thermal efficiency of the system and the safety of the device. 
     (2) The circulating working medium mainly relies on the condensation phase transformation process to realize low temperature heat release. The temperature difference loss between the circulating working medium and the environment is controllable, which is conducive to improving the thermal efficiency. 
     (3) The present invention adopts the low-pressure and high-temperature operation mode to work in the high-temperature region. Therefore, the contradiction among thermal efficiency, the working medium&#39;s parameters and the material&#39;s temperature resistance and pressure resistance abilities, which is common in traditional vapor power devices, can be resolved. The temperature difference loss between the heat source and the circulating medium can be greatly reduced, and the thermal efficiency can be greatly improved. 
     (4) In the present invention, the equipment is shared to increase the heat absorption process of the lower cycle (Rankine cycle) and improve the thermal efficiency. 
     (5) The present invention only uses a single working medium, which reduce the operation cost and improve the flexibility of thermal device. 
     (6) When the high-temperature expander is shared, the number of core equipment is reduced, which is conducive to reducing system investment and improving thermal efficiency. 
     (7) The present invention effectively deals with the high-temperature heat source and the variable temperature heat source, the high-quality fuel and the non high-quality fuel, and has a wide range of application. 
     (8) On the premise of realizing high thermal efficiency, the device in the present invention can be selected to operate at low pressure, so as to greatly improve the operation safety of the device. 
     (9) The present invention can realize the heat recovery of enterprise device simply, actively, safely and efficiently. 
     (10) The thermal efficiency improves effectively when the present invention is applied to the lower end of the gas-steam combined cycle. 
     (11) When the present invention is applied to the coal-fired thermal system, it can maintain the original advantages of the traditional steam power cycle in which water vapor is used as working medium and has a wide range of working parameters. According to the actual situation, the present invention can work in subcritical, critical, supercritical or ultra supercritical state, etc.