Study And Design Solar Heating System Of Rural House In Lanzhou

Nowadays, with the emergence of energy crisis, it is a trend to look for a new renewable energy. Solar energy, as a new renewable energy, it is in line with the current requirements to reduce energy consumpution and environmental protection. Lanzhou area is located in the western region, where has abundant solar energy resources and light enough time, so it is good for research solar energy. In this paper, from the perspective of building energy conservation, according to the architectural layout and the planning concept, a design thought which is for a new type of rural house has put forward. Simultaneously, a solar assisted air source heat pump heating system has been mainly designed which is used in this type of rural house and is suitable for this area. In this paper, the main contents and conclusions in this study are as follows:1. From the perspective of building energy concervation, based on the characteristics of local residential design in Lanzhou, from the design of architectural layout, planning concept to retaining structures, a design thought which is for a new type of rural house has put forward. Simultaneously, a solar assisted air source heat pump heating system has been mainly designed which is used in this type of rural house and is suitable for this area. The solar heating system, hot water system of air source heat pump, floor radiant heating system in this residential building has made detailed analysis and calculation. At the same time, the system working principle, operation mode and control mode is described.2. Using TRNSYS software, a solar assisted air source heat pump heating system in this residential building has been simulated. According to this software, solar radiation, solar fraction, collector efficiency factor, indoor temperature, the hourly load indoor and the change of outside temperature has been acquired. On this bases, the parameters of system design is optimized to obtain the optimal parameters of system. From the simulation data,we can draw the conclution that solar assisted air source heat pump system is practical in Lanzhou area.3. Based on the annual cost methed, the comparation and analysis on the technical and economic performance among the solar assisted air source heat pump heating system, central heating system, gas heating system to analyze economic benefit, it is concluded that the annual cost of solar assisted air source heat pump system is in lowest value, and make the analysis of its environmental benefits, which has showed that solar assisted air source heat pump heating system is advantage of development.From the perspective of energy saving and economy, this paper research results show that the feasibility of solar assisted air source heat pump heating system, as well as provide a new idea of rural residential heating system design, improve the demand for residential comfort and environmental benefits.