Study the Opportunity of Using Waste Heat of an IC Engine to Run an ARS

Abstract

Abstract This study aims at investigating the opportunity of using renewable or sustainable energy resources for operating a refrigeration system. Waste heat represents one of heat energy resources that disposed to the surrounding without benefit. Therefore, it will be great opportunity to investigate the use of this waste heat for ARS. Four scenarios are suggested for evaluating the effectiveness of exhaust to run the refrigerator. First scenario at no engine load, second scenario at 25% engine load, third scenario is at 50% engine load and the fourth scenario is at 75% engine load. The reason for choosing study at different loads is the different amount of heat energy exhaust at each condition of operation for the engine. The kerosene fuel is used as a heat source for the generator of the refrigerator as well to study the effectiveness of it. Moreover, the convention heater that works on electricity is used also to analyze the refrigerator performance. The experiments are conducted repeatedly as possible to ensure the authenticity of the results. The results of using waste heat have revealed variety of performance in accordance with engine loads. The refrigerator performance when engine at no load is the worst, and at engine load 75% is the best among the four scenarios. When the engine at no load, the temperature inside freezer does not decrease or change. Moreover, at 25% engine load the temperature inside freezer decrease from 14.2°C to -10.2°C during 180 minutes and in the fridge cabinet temperature varied from 14.8°C to 16.6°C during about 180 minutes with room temperatures between 15.9°C and 19.3°C. Further, at 50 % engine load the temperature inside freezer decrease from 27.7°C to -5.3°C during 180 minutes and in the IV fridge cabinet temperature varied from 28°C to 29.9°C during about 180 minutes with room temperatures between 29.3°C and 38.5°C. Finally, at 75 % engine load the temperature inside freezer from 29.9°C to -13.5°C during 180 minutes and in the fridge cabinet temperature decreased from 30.7°C to 25.9°C during about 180 minutes with room temperatures between 31.8°C and 40.9°C. Therefore, the results show the effectiveness is increasing dramatically with respect to the heat entering the generator. Finally the waste heat rate range is from about 60 W to 180 W based on the engine loads.