استخدام حرارة ماء تبريد المحرك لتشغيل منظومة التبريد الامتصاصية لتكييف هواء السيارة

Abstract

It is known that one- third of the energy generated by combustion of fuel in internal combustion  engines  transfer  to the walls of engine parts and causing their  temperature to rise . This lost energy is extracted by the water cooling system. This paper  is addressed to investigate the possibility of using a lost heat to drive absorption refrigeration system as an alternative system for car air conditioning . Lithium Bromide – water  absorption refrigerator is suggested for this application . A theoretical analysis of the system has been carried out to maximize its cooling potential . The study was conducted on the 6-cylinder petrol engine and it is found that the wasted energy from the engine cooling system is ranged between 10.8 kW at engine speed 500 rpm to  77.6 kW at engine speed 2000 rpm . In this research was calculated the cooling capacity and of the coefficient of performance of the system at different temperature in the condenser and evaporator and noted that the low level of the water temperature did not allow the refrigeration system to produce continuous cooling corresponding to engine speeds at a low evaporator temperature (less than 22 °C)  , especially at hot weather condition (at 45 °C)