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A refrigeration process comprising, compressing low pressure vapor refrigerant to a higher temperature and pressure vapor, condensing the higher pressure vapor refrigerant into a liquid refrigerant at the higher pressure, thermally-isolating the higher pressure liquid, cooling the thermally-isolated

A refrigeration process comprising, compressing low pressure vapor refrigerant to a higher temperature and pressure vapor, condensing the higher pressure vapor refrigerant into a liquid refrigerant at the higher pressure, thermally-isolating the higher pressure liquid, cooling the thermally-isolated liquid refrigerant while remaining thermally-isolated and then allowing thermal contact of the remaining low temperature and pressure liquid and a cooled substance causing the low temperature and pressure liquid to further reversibly boil to a vapor at the low pressure.

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1. A refrigeration process comprising the steps of: compressing a low pressure vapor refrigerant to a higher temperature and pressure vapor refrigerant, condensing the higher pressure vapor refrigerant into a liquid refrigerant at the higher pressure, thermally-isolating the liquid refrigerant,

1. A refrigeration process comprising the steps of: compressing a low pressure vapor refrigerant to a higher temperature and pressure vapor refrigerant, condensing the higher pressure vapor refrigerant into a liquid refrigerant at the higher pressure, thermally-isolating the liquid refrigerant, evaporatively cooling the liquid refrigerant while the liquid refrigerant remains thermally-isolated to form a cooled liquid refrigerant, powering an engine with a pressure difference between the liquid refrigerant and the low pressure vapor refrigerant, and then allowing thermal contact of the cooled liquid refrigerant and a substance to cool the substance. 2. A refrigeration system comprising: at least one compressor for compressing a low pressure vapor refrigerant into a higher temperature and pressure vapor refrigerant, at least one condenser for condensing the higher pressure vapor refrigerant into a liquid refrigerant at the higher pressure, at least one cooling evaporator from which the liquid refrigerant is thermally isolated for cooling the liquid refrigerant to a lower temperature to form a cooled liquid refrigerant, and powering an engine with a pressure difference between the liquid refrigerant and the low pressure vapor refrigerant, and at least one evaporator for allowing thermal contact of the cooled liquid refrigerant and a substance to cool the substance. 3. The system as described in claim 2 wherein the cooling evaporator includes a liner of low thermal conductivity. 4. The system as described in claim 2 wherein the cooling evaporator is made of a material which has a low thermal conductivity. 5. The system as described in claim 2 wherein the cooling evaporator includes an inner surface whose thermal conductivity is low. 6. The process as described in claim 1, wherein the lower temperature is a preset point or a temperature of an evaporator cooling coil of the evaporator.