Vapor absorption refrigeration in road transport vehicles

This study includes an experimental investigation into the use of vapor abs orption refrigeration (VAR) systems in road transport vehicles using the wa ste heat in the exhaust gases of the main propulsion unit as the energy sou rce. This would provide an alternative to the conventional vapor compressio n refrigeration system and its associated internal combustion engine. The p erformance of a VAR system fired by natural gas is compared with that of th e same system driven by engine exhaust gases. This showed that the exhaust- gas-driven system produced the same performance characteristics as the gas- fired system. It also suggested that, with careful design, inserting the VA R system generator into the main engine exhaust system need not impair the performance of the vehicle propulsion unit. A comparison of the capital and running costs of the conventional and proposed alternative system is made. Suggestions are also made regarding operation of the VAR system during off -road/slow running conditions.