Study Of Hybrid Solar Heating System

With the continuing development of our national economy, the demands of building comfort is ever increasing, building energy consumption is growing rapidly, the proportion of building energy consumption to whole society total energy consumption is close to 30%. In building energy consumption, heating account is about 45%,and the traditional way is to use high-quality heating fuel chemical energy to meet the needs of low-quality energy, it is the key area of building energy efficiency. Solar energy, which is one of the important long-term reliance on, is a clean and renewable energy, the use of solar thermal energy to building heating can get a very good energy-saving and environmental benefits.For the characteristics of solar heating, this paper presents Hybrid Solar Heating System, which works up with artificial energy. It makes up for dispersion discontinuity and instability of the traditional way of using solar energy.Firstly, on the analysis of the basis of theoretical calculations of solar radiation, we established solar radiation model of tilted surface and we use this model to optimize the South collector angle of the Northern Hemisphere in winter; From the perspective of energy use, based on the first and the second thermodynamic laws, this article gave the system a thermodynamic analysis from the perspective of energy use, which provides a theoretical basis for the design of the system and gave an analysis of various factors on the effect of energy saving. In design, we do DeST simulation of dynamic thermal loading first, which makes up for past lack of steady-state load calculation method,Secondly, take a typical project for example, this article designed and optimized a Hybrid Solar Heating System with use of the theory. We mapped curve of dynamic thermal loading and solar thermal efficiencies and use Origin 7.5 do curve fitting to get wave equation, used the wave equation to do integration to get the hot water tank's greatest heat accumulation amount when solar thermal efficiencies is more than dynamic thermal loading and get Average daily auxiliary heating amount during the heating period;this study obtained a mode of auxiliary heating source which corresponds to the principle of energy matching by analyzing of the code of auxiliary heating source in terms of comprehensive energy price;discussed the heat-accumulating performance of the material of the floor from the perspective of its thermophysical properties; analyzed operation control and security control of the collector system, mutual switching relationship between solar collector system and the auxiliary heat source and heating circuit control, designed auto control system and mapped automation measurement and control principal diagram.Lastly, In order to research the system performance and features in actual operation, this study built an experimental station, tracked test of system performance, analyzed the influence of the out door meteorological parameters, researched its operating law and Influencing factors, then provided basis for the promotion and application of Hybrid Solar Heating System.