Abstract

Solar hot water is one of solar applications which have been used over the past some years in Vietnam. But, due to the high cost and the large needed surface for installing, the application of solar hot water has not yet attracted the attention of the society. Aiming to solve this problem, a non-conventional solar hot water system has been designed and tested. In this system, the use of flat plate solar collector is cancelled. With this construction, the cost of the system and the needed surface for installing are reduced. The test results show that this system meets the demands in use and it may be produced as commercial product.