An organic Rankine cycle was selected to design a set of vapor compression refrigeration system driven by exhaust heat of an IC engine and using the mathematical model of the circulating system established according to the laws of thermodynamics

a method for determining the heat transfer pinch point of tail gas was proposed. Using Matlab and Refprop software as tools

the variation of the organic Rankine cycle heat exchanger's load

cycle work and thermal efficiency with evaporation pressure and condensing temperature was studied to determine the optimum working fluid with highest thermal efficiency and largest output power. At the same time

the change of the refrigeration heat exchanger's load and refrigeration coefficient with evaporation temperature and condensing temperature was also studied to determine the optional refrigerant with largest refrigerating capacity and highest refrigeration co-efficiency. Finally

in the case of using the best ORC working fluid and refrigerant

the refrigerating capacity

refrigeration coefficient and comprehensive coefficient were calculated under the most severe conditions for each type of refrigerated trucks.