Design And Analysis Of The Solar Living Hot Water System In A Central Heating House

The solar hot water supply system is friendly to enviroment and can save energy, so it is attentioned by more and more people. The solar energy hot water supply system continuous operating in whole year needs supplementary heat source. At present, most supplementary heat sources use oil heaters or gas heaters, minority use electricity. All the supplementary heat sources systems have the drawbacks of large infrastructure investment, long idle time and etc. There are two kinds of solar energy hot water system in common use. One is the seperate home solar energy system, another is compound mode which is made of centrilized solar energy hot water supply system and supplementary heat source. Bacause of solar energy's discontinuity and instability, the seperate home solar energy system can not collect sufficient energy and can not be normally used in some months of one year, on the contrary, the colleted solar energy exceed the amount of demand in the other months,so the redundant enerry is wasted. The compound mode of centralized solar energy hot water system and supplementary heat source has not the disadvantages of seperate home solar energy system above-mentioned. However, it needs large first cost, and it needs person specially assigned for maintenance. For the centralized heating house,we need mount two systems.One is for heating houses and another is for living hot water. Two systems occupy more construction space. In our country, heating is needed in most regions during winter. As a energy-saving and comfort heating mode, low temperature hot water floor radiant is more and more favered by people.This article introduces a new system which is made up of a solar living hot water system and a low temperature hot water floor radiant heating system. The central heating system is the supplementary heat source of the solar living hot water system, and it can also recover the redundant heat of the solar living hot water system. This scheme can supply heating during the heating period and also supply living hot water in the whole year, so it can make full use of the collected solar energy. Analysis shows that the scheme can save the operating energy consumption and operating cost according to the meteorological data of Xi'an.