WASTE HEAT RECOVERY SYSTEM FOR REFRIGERATOR

Mechanical Engineering

Waste heat recovery is very important now a day due to energy crisis. All domestic refrigerators use air cooled –finned condenser on backside. As domestic refrigerators reject large heat inside room which make us uncomfortable in summer due to temperature rise inside the room. So it is now essential to reject this heat outside the room or utilize it for different purposes. So energy can be saved. The strategy of how to recover the dissipated heat to develop a waste heat recovery system is relevant. The energy lost in waste heat cannot be fully recovered. However, much of the heat can be recovered and the loss can be minimized. From experimental work carried out in laboratory as mentioned in this paper heat is recovered by increase in temperature of insulated hot box which may be utilized for keeping food and beverages warm, to warm water which may be feed water or other domestic applications such as washing utensils etc. Waste heat recovery from a domestic refrigerator cycle experiment system is presented in this work. Preliminary calculations showed that, without consuming extra electric power, hot box of about at 55oC- 60oC can be generated by the recovered heat from such domestic refrigerator.

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