Experimental Investigation to Enhance the Performance of Heat Exchanger Used In Silica Plant to Recovery Waste Heat

Hot water plays an import role in modem life. The consumption of hot water represents a significant part of the nation's energy consumption. One way of reducing the energy Consumption involved, and hence the cost of that energy, is to reclaim heat from the waste Warm water that is discharged to the sewer each day. The potential for economic waste water heat recovery depends on both the quantity available and whether the quality fits the requirement of the heating load. To recover heat from waste Water in residential and commercial buildings is hard to achieve in quality because of its low temperature range. Nevertheless, efforts to recycle this waste energy could result in Significant energy savings. The objective of this research was to develop a multiple heat exchanger for a waste water heat recovery system. The advantage of the system proposed in this work is that it not only provides useful energy transfer during simultaneous flow of cold supply and warm drain water but also has the ability to store recovered energy at the hot water for later use. While this concept is not new, the design of the heat exchanger proposed for the present study is significantly different from those used previously. Measurements of hot water usage and waste water temperature and flow rates were obtained for a potential application of the proposed exchanger.