Research On Feasibility Of Solar Heating Application In Residential In The Northern Shaanxi Region

In recent years,due to the continuous development of energy-saving buildings in China,especially the energy consumption(or load)of residential buildings has been greatly reduced,which has created conditions for the utilization of renewable energy sources(solar energy).The solar water heater solar energy resources and rich families in Northern Shaanxi Based on the installation(according to local energy requirements),in order to give full play to the role of solar energy,to provide a new way of energy saving of residential heating in winter a large amount of wide,from the view of engineering practice as research background.Firstly,this paper presents a kind of heating system which uses solar energy as the only heating source,and uses TRNSYS software to simulate the operation of the system in the whole winter.The simulation results show that the solar energy as the sole heating source can significantly improve the thermal comfort of indoor environment,but it can not meet the needs of the lowest thermal comfort.Then,the paper puts forward two kinds of series heating system of solar energy and wall mounted gas boiler,and uses the TRNSYS software to simulate the whole year.The simulation results show that the solar energy and wall mounted gas boiler heating throughout the year can save energy consumption of 7242.44 MJ,which saves the amount of natural gas consumption 246.13 cubic meters,power consumption 1399.68MJ;solar energy and wall mounted gas boiler parallel heating throughout the year can save energy consumption of 589.96 MJ,which saves the amount of natural gas consumption 90.22 cubic meters,power consumption 1399.68 MJ.The scheme of series heating with solar energy and wall mounted gas boiler has obvious energy-saving effect compared with the single wall mounted gas boiler heating scheme,while the energy-saving effect of the solar energy and wall mounted gas boiler parallel heating scheme is very small compared with the single wall mounted gas boiler heating scheme,the system is complex and the initial investment is high.Optimize the design parameters of heating system of solar energy and wall mounted gas boiler,the optimum inclination of the solar collector installed under different balcony orientations and the optimum volume of the regenerator under different load conditions are obtained.Exterior wall polystyrene plastic foam board(EPS board),when the EPS thickness increases to 9cm the building load basically no change,the system will no longer reduce annual energy consumption;with the temperature sensor control system can get obvious energy-saving effect in the room.After the optimization of the heating system and the external insulation of the building,the whole heating season building heat load is 16870 MJ,reduced by 44.2%;the amount of heat supplied to the room is 21130 MJ,reduced by 60.1%;The amount of solar heating is 8993 MJ,accounting for 44.2% of the whole heating capacity,increased by 29.7%;the whole heating season natural gas consumption 425.7 cubic meters,saving 73.1%;total power consumption is 27841 MJ,reduced by 59.1%.After the reform of the building envelope and the optimization of the system,the heating energy consumption of the whole building is greatly reduced,and the energy-saving effect is very well.