Design And Optimized Study On The Solar Energy Hot-water Heating Collection System Of Tibet

Under the premise of world energy crisis and global environmental problems become more serious,renewable resources-solar energy for its clean safe and inexhaustible advantage draws more and more attention.However,as with its intermittent and instability, the envelope of the heating building exist storage capacity,the effect on indoor temperature have the lagging and delaying phenomenon,so the practical application of engineering used in calculating collector area of steady method will have some error.In view of this,the article tries to use clean,safe and rich solar energy in Tibet as the background,and study up on the solar collector systems with dynamic methods.According to the research on the outdoor meteorological parameters,solar radiation and building thermal heating load of dynamic changes,this article through the establishment of mathematical models to determine the dynamic conditions of the solar collector area,and have a comparative analysis in calculating collector area between steady method and dynamic method.Through the use of DeST software do dynamic simulation in Tibet area in different cities, different types of civil heating building,this paper make the conclusion that:under the premise of satisfying the currently energy conservation standard,due to the solar energy resources in Tibet area is abound,appropriately increasing the area of the South window may reduce the building energy consumption,thus can diminish the collector area of the system; the collector covered the entire roof the collector area of the low-rise building for 1 to 5 story can provide enough heat which can fully meet the requirements of building heat load;the collector area which calculated by the dynamic method are smaller then the steady method, the practical application of engineering can use steady method to calculate collector area,but need to multiply a correction factor.The conclusion of the simulation results against Tibet play a simple guide to the practical application of engineering,and provide more convenient and efficient theory to the design of the solar energy heating collection system.