Study On The Application Of Solar Space Heating In Hongyuan Airport

High altitude cold regions have the characteristic of high altitude, low air pressureand low temperature. In these areas, the spring and autumn are short, and the winter islong and cold. The energy used for heating accounts for a high proportion of the totalbuilding energy consumption. High-altitude cold regions are lack of conventionalenergy sources, and transportation is inconvenient. But the solar radiation intensity ishigh in high altitude cold regions, the majority of which are in Class I and II solarenergy resource regions. The use of the abundant local solar energy resources hasbecome an important option for heating in the high altitude cold areas. Reasonabledesign of solar heating systems is critical to the best working condition, however, thereare rarely researches (especially the direct heating mode) on the whole heating seasonperformance and design optimization of solar heating systems in high altitude coldregions. Therefore, the purpose of this study is to investigate the operating performance,to optimize the system configuration, and to provide some guidance in the applicationof the solar heating system at high altitude cold regions.Firstly, by DeST, this paper took Hongyuan Airport as an example to analyze theoutdoor climatic characteristics, the natural temperature and heat load of different typesof constructions in high-altitude cold regions, and provided guidance on the regulationof indoor thermal environment at high-altitude cold regions.Secondly, the mathematical model of the water source heat pump assisted solarheating system of Hongyuan Airport has been established. The principles and operatingmodes of the heating systems has been presented, and mathematical models of solarcollectors, water source heat pump units, stratified storage tank and system controlstrategies have been introduced in detail.Thirdly, appropriate TRNSYS components was selected according to themathematical model of the studied water source heat pump assisted solar heating system.The water source heat pump model in the studied system was established by combiningthe water source heat pump component and the EQUTATION component in TRNSYS.On these basis, the TRNSYS model for the studied water source heat pump assistedsolar heating system has been established and validated with measured data. Then, theperformance of the water source heat pump assisted solar heating system was analyzed,and the economic and energy efficiencies were compared with that of water source heat pump system and gas boiler heating system.Lastly, based on the operating characteristic analysis, the mounting angle of thecollector, heat storage unit volume, collector area and the heating temperature wereoptimized, and the effects of these parameters on system performance were studied.Setting economic efficiency and energy efficiency as optimizing indices, and taking intoaccount of the performance of the system, this paper puts forward an appropriate systemconfiguration of the solar heating system of Hongyuan Airport, and provides guidancein the application of solar heating system in high altitude cold regions.