Research On The Solar Heating System In Plateau And Cold Regions

nowadays,we are facing the double pressure of energy consumption and environmental pollution, The development and utilization of clean energy has become a big trend of energy development. Elevations are most of the western plateau areas in China is faced with crisis of heating in winter, and these areas by its abundant solar energy resources, has the good conditions for the development of the solar energy heat utilization technology. But ordinary solar heating system uses water as heat transfer medium, freezing of solar heating systems in winter and overheating problems in summer such as make solar heating in plateau cold area is limited a lot.In view of the above situation, this paper focuses on the research of solar heating system in cold plateau region and application.This paper to a community service, Ping’an County, Xining City, Qinghai Province as the experimental platform, the system adopts new type DC "double pass solar vacuum collector tube" and "high performance PCM phase change storage core" combination of solar energy collector and efficient capsule type heating of the heat water tank for heating. At the end of the radiator heating users, the various components of the heating system were theoretical analysis, numerical calculation and experimental research of and research results through similar engineering analogy method is applied to the alpine region, mainly including the following aspects:（1） provide air type PCM photothermal solar water heating engineering as a community service center, Ping’an County, Xining City, Qinghai Province, including system design, calculation and selection, according to the characteristics of the project, actively carry out optimization design system, so that the system has the advantages of simple operation, convenient use, safety and economy, stable and efficient.（2） The design and construction of the system debugging, completed its system heating season security testing. Find out the problems existing in the application:solar air heating system of heating medium is through the roof fan in circulation, the building with the collector header, the roof surface connection will cause the noise affects the environment quality of life, office; When the hot air flowing through the collector has a certain air leakage due to construction, so as to reduce the collection efficiency of the system.（3） Experiments the process of the operation of the system research air type PCM solar heating system of each performance index in hot water tank, the capsule type performance test. Conclusion: winter heating 10 hours during the day, during the heating of indoor heating average temperature of 21.2 ℃, the average relative humidity is 48%, satisfies the requirement of indoor heating comfort; System of collector array thermal efficiency calculation results is 40.13%; Heating system during the heating load of 29.58 k W, system heating load per unit area is 41.5 W/m2, the heating thermal performance coefficient is 0.557.（4） analysis of the main economic, social and environmental benefits and the plateau region of the solar heating system. Conclusion: The gas heating, coal-fired boiler heating, air conditioning, heating, solar heating four kinds of PCM air heating mode, PCM solar air heating annual cost is the lowest; MA Yi Village community service centers PCM solar air heating project emissions a year heating season CO₂28 t, S02220 Kg, NO_x99 Kg, dust 1375 Kg.Based on the four aspects of the research content, the test data in Qinghai area based. The research results by similar engineering analogy method is applied to the plateau alpine region, the feasibility study of plateau alpine zone system, guide engineering applications.