A study on multifunction heat pipe type high efficient adsorption refrigerator using compound adsorbent-ammonia

A multifunction heat pipe adsorption refrigerator is designed, which uses solidified compound adsorbent of CaCl2 and activated carbon as adsorbent. Two work conditions, ice-maker driven by the exhaust heat from diesel engine and air-conditioning powered by solar energy, are studied. SCP (specific cooling power) and COP (coefficient of performance) for different conditions are analyzed. The optimum average SCP and COP for the refrigerator powered by waste heat of diesel engine are 770.4 W/kg and 0.39 at about-20°C evaporating temperature. The optimum average SCP and COP for the refrigerator powered by solar energy are 524.2 W/kg and 0.27 at about 5.6°C evaporating temperature.