Minimizing the Energy Consumption for Building by Using the Concentrating Water Solar Collector in Hot Arid Region "Experimental Work"

Abstract

This work deals with the possibility of reducing energy consumption. This was accomplished by blocking or eliminating the effect of direct solar radiation in summer. Also it was achieved by using the blocked solar radiation to obtain hot water in buildings where the cooling demand is dominant and hot water is required simultaneously. The procedure was done at Baghdad (Lat. 33o N) on 28th,29th, July and 21st, 22nd, 23rd, September 2010.In this work a room was built. Each wall is of 1m2 area. Also, the concentrating water solar collector (CWSC) was manufactured using steel frame with mirror, glass and tubing. Water was pumped into the (CWSC) which was installed in an adjacent place to the room. This study shows encouraging results. The heat gain through the wall was reduced by 30%. In addition, the instantaneous efficiency of the solar collector was 45%. However, this value was reduced when the water inlet temperature was increased. It can be concluded from this work that using the (CWSC) helps to reduce the required energy consumption for cooling and heating simultaneously.