of a hydraulic refrigeration system a hydraulic refrigeration system can be used as a heat pump in the same general manner as can any vapor compression refrigeration system in such system the evaporator temperature is made less than that of an available environmental heat source to transfer heat from the heat source to the refrigerant as the refrigerant passes through the evaporator ultimately the heat is manifested as thermal energy in the hydraulic refrigeration system circulating water the water or carrier is maintained at a temperature greater than that of the fluid or object to be heated and heat is continuously removed from the hydraulic refrigeration system by such fluid or object through heat exchanger 21 just as in the case with a conventional vapor compression heat pump the hydraulic refrigeration system supplies as heat both the energy entering the refrigerant at the evaporator and the energy supplied to the water carrier and refrigerant by the pumps therefore the 34 energy efficiency ratio 34 eer is larger when the hydraulic refrigeration system is used as a heat pump than it is when the hydraulic refrigeration system is used as a refrigerator a regenerator 22 can be added to the basic hydraulic refrigeration system and will result in an increase in the eer that is the system becomes more energy conservative the regenerator is a refrigerant to refrigerant heat exchanger the liquid refrigerant flowing toward expansion valve 24 at a nominal temperature of 100 u00b0 f exchanges heat in counterflow with the vaporous refrigerant leaving the evaporator at a nominal temperature of 50 u00b0 f as a result.