Please select the most similar patent number from A, B, C and D. Which number is?
A power source unit body for catapulting. The power source unit body for catapulting (77) comprises a high-pressure chamber (7), a flow splitting chamber (8) and a cooling water chamber (9). High-temperature high-pressure fuel gas generated through burning of gunpowder (36) enters the flow splitting chamber, a part of the fuel gas enters a vertical pipe (29) from a fuel gas inlet, and another part of the fuel gas squeezes a water bag (19) in the cooling water chamber, so that cooling water in the water bag is sprayed into the vertical pipe from a cooling water nozzle, and is mixed with high-temperature high-pressure fuel gas to generate steam, and the steam and the gunpowder fuel gas are formed into mixed gas. In the power source unit body for catapulting, gunpowder is placed in a cartridge case (6), and when it is required to release energy, by means of percussion, the power source unit body for catapulting releases high-pressure gas, thereby implementing catapulting of a shipboard aircraft. Also, an aircraft carrier gas-steam catapult and a catapulting method for implementing catapulting of a shipboard aircraft by use of the power source unit body for catapulting.
A: The invention relates to a high-pressure reheating gas-steam combined cycle power generation system and a power generation method. The system consists of a gas turbine sub-system and a steam turbine sub-system. The gas turbine sub-system comprises a device used for two-stage air compression, twice combustion as well as high-pressure and medium-pressure twice turbine working; after initial working of high-temperature gas, the high-temperature gas enters a medium-pressure combustion chamber and is reheated for secondary working, improving the average heat absorption temperature of the whole cycle; and at least a one-stage intercooler is arranged between two-stage compressors, and the heat flow of the intercooler is connected with the two-stage compressors. The steam turbine sub-system adopts a three-pressure reheating type boiler and a steam turbine, the cooling water of the intercooler is connected with high-pressure water, and high-pressure, medium-pressure and low-pressure water as well as the cooling water of the intercooler absorbs heat at different stages for multiple times, thus utilizing the heat energy efficiently. When the high-pressure reheating gas-steam combined cycle power generation system by the present invention is operated with the optimum parameters, the combined cycle efficiency is increased by 3-5 percentage points compared with a combined cycle system mainly adopting a gas turbine class F, and the single-machine output power is increased by more than 70%, reaching level 800MW.
B: A gas turbine intake air cooling device using waste heat as driving force, the intake air cooling device comprising an air cooler or a cooling tower (6), a surface cooler (1), a cold water tank (7), and at least one waste heat chiller (4); the two low-temperature water ends (D, C) of the waste heat chiller (4) are connected to the surface cooler (1) via valves (I, II) and/or valves (IV, V, VI) and the cold water tank (7); the two cooling water ends (A, B) of the waste heat chiller (4) are connected to the two cooling water ends of the cooling tower (6); the high-temperature flue gas input end of the waste heat chiller (4) is connected to a waste heat fuel gas pipe (3) of a gas turbine; and the cooling air outlet of the surface cooler (1) is connected to the air intake of a gas turbine (2). The gas turbine intake air cooling device using waste heat as driving force has less energy consumption, low operating costs and controllable intake air humidity.
C: Aircraft carrier aircraft takeoff catapult equipment, comprising a flight deck (18) having a gap (19), front and rear pulleys (20 and 23), and steel cables (36) wrapped around the pulleys. A connector block (45) connects both ends of the steel cables together. A block base (47) is provided on the connector block. A takeoff driving motor (25) can directly drive a pullable swinging arm (7) on the nose gear of an aircraft via the rear pully, the steel cables, and the block base (47) on the connector block or drive an aircraft to run and take off via a reciprocating shuttle. Because the friction between the pulleys and the steel cables can be increased by providing multiple steel cables and increasing the force of a tightening mechanism, this aircraft catapult equipment can easily achieve the driving force required by the aircraft to take off; moreover, the overall structure of the equipment is simplified, is also easy to process and manufacture, and is very suitable for use in catapulting a heavy aircraft taking off from an aircraft carrier. The equipment also is suitable for being miniaturized for installation on a ship or vehicle, specialized in catapulting the takeoff of a small-sized unmanned aerial vehicle.
D: A magazine for an ejection apparatus and said ejection apparatus, the magazine comprising a housing (1) wherein is formed a cavity for accommodating a projectile and wherein are arranged a push-plate (2), a pull-plate (3) and a first elastic element (4); the push-plate (2) and the pull-plate (3) are movably arranged within said housing (1), the pull-plate (3) being capable of movably pulling the push-plate (2) so as to increase the volume of the accommodation cavity so as to allow a projectile to be loaded into said cavity; one end of the first elastic element (4) is retained upon the housing (1) and the other end is retained upon the push-plate (2), the purpose whereof being to cause by means of elastic recovery movement of the push-plate (2) when the pull-plate (3) is released. When in use, pulling upon the pull-plate (3) entrains movement of the push-plate (2) so as to allow loading of a projectile into the accommodation cavity; once said projectile is thus loaded, release of the pull-plate (3) causes the push-plate (2) to steadily press upon the projectile through the effect of the first elastic element (4). Projectile-loading operation of the present magazine is simple and convenient, while provision of the first elastic element and of the push-plate ensure smooth conveyance of projectiles, thus effectively avoiding problems of uneven projectile conveyance.
Answer: C