دراسة عملية لتحسين الخزن الحراري لمجمع شمسي خازن موشوري الشكل ذو مقطع مثلث قائم الزاوية

Abstract

Solar storage water heater systems are not often efficient for overnight applications as their thermal output diminishes sharply as the availability of solar energy decreases. The present research is an experimental study on improving the thermal storage of a prism shaped storage solar collector with a right triangular cross section. This was done by modifications in the design and shape of storage tank of ICSSWH systems [1] in such a way as to provide an extra storage tank which is continuously thermally insulated and which becomes an integral part of the solar complex. Thus it maintains a sufficient quantity of warm water for home consumption during the night. For this purpose two solar collectors were made: one is in the conventional triangular shape and the other by using the proposed method. The two collectors were tested during the period from February to July (2011), under Baghdad climatic condition. The results show that the proposed design of solar collector increases the amount of the hot water by (23%) at nearly the same thermal gradation or a little less in comparison with the conventional design of solar collector. Furthermore, it provides the amount of (70 liter) of hot water for evening use.