Patent AU-2021200260-A1 (AU)
Title: An Advanced Refrigeration Cycle and its enabling Isolated Dynamic Liquid Expansion engine
Inventor: SHELLEY STEPHEN LAURENCE
IPC: F25B27/02
Filed: 2021-01-18
Abstract: An Advanced Refrigeration Cycle and its enabling Isolated Dynamic Liquid Expansion engine 
Abstract 
In the Advanced Refrigeration Cycle (ARC) process, a Condenser Heat Exchanger (4) 
condenses high pressure refrigerant vapour from the Discharge Line (3) of the Compressor 
(1) to produce Reheated Motor jacket Fluid (6) that flows through the motor jacket of the 
IDLE engine (7) where it provides adequate heat to fully flash evaporate hot refrigerant 
parcels of liquid injected by the Flow Control "Fuel" Injector (12) and sourced from the 
Liquid Line to Injector (10) and thence from the Optional Receiver (8) and thence from the 
Condenser Heat Exchanger (4). The hot refrigerant Lqud is injected into the cylinder or 
rotor chamber of the IDLE engine (7) at the beginning of the expansion or power stroke 
where it mixes with vapour captured and Isolated by the intake stroke sourced ultimately 
from the Low Pressure Suction Line (15) out of the Evaporator Heat Exchanger (14). The 
flash evaporation of the injected Liquid and its consequent Dynamic Expansion from liquid 
to vapour providing the Dynamic power of the IDLE engine. The Isolated refrigerant vapour 
sourced ultimately from the Low Pressure Suction Line (15), now intermixed with the flash 
vapour containing heat energy from the Reheated Motor Jacket Fluid (6) is exhausted by the 
exhaust stroke of the IDLE engine (7) which therefore delivers a relatively high pressure 
refrigerant vapour through the IDLE engine's Exhaust Manifold (19) into the High Pressure 
Suction Line (20) and from thence ultimately to the Suction Line (2) of the Compressor (1).  
After removal of energy from the Mechanical Power Output (26) of the IDLE engine (7) and 
leakage losses, the balance of the energy absorbed by the Evaporator Heat Exchanger (14) is 
removed from the Warm Motor Jacket Fluid (23) by the External Hot Side Heat Exchanger 
(24) and the fluid returns through the Motor Jacket Fluid Return Line (5) to the Condenser 
(4) to become Reheated Motor Jacket Fluid (6) again. The Mechanical Power Output (26) is 
proportional to the heat energy absorbed by the Evaporator Heat Exchanger (14), is much 
greater than the power requirement of the Compressor (1), particularly when high pressure 
vapour enters Suction Line (2) from the High Pressure Suction Line (20); so once the 
Evaporator Heat Exchanger (14) has intaken enough heat energy for the Reheated Motor 
Jacket Fluid (6) to reach operating temperature and the IDLE engine (7) has started, the 
cooling process produces power rather than consuming it.  
The proposed Advanced Refrigeration Cycle (ARC) requires the Isolated Dynamic Liquid 
Expansion engine (IDLE) process; and the IDLE engine process requires operating conditions 
created by the ARC process; making it appropriate to present the ARC and IDLE processes 
together.  
Together the ARC-IDLE process provides: 
1. A greatly superior refrigeration cycle process called herein the "Advanced 
Refrigeration Cycle" (ARC) process; 
2. A practical flash-evaporation engine process called herein an "Isolated Dynamic 
Liquid Expansion" (IDLE) engine process; 
3. A practical means to cool a fluid to generate either small or (very) large quantities of 
mechanical or electrical power; and 
4. This patent claims these processes and numerous applications for these processes.  
1
C 
0 
E 
<j 
O c U 0 
c
.E 
Z z 
0W 
z -) 
E o 
o 7 .o0 
0>0 u4
(72 
46E .  
0m. w 
0--( 
UJ e>x)2 
Q -)' -
0C 
EE 
C 
u.C 
0 ).  
YJAZZ C0 
oy 0 0 ----- W 
U- VMMJ LU Ir 
>V< 
;5 0 
-~ 0..--0 
.4-I E.4--J 
E 
- *0 
LUn