Study On Multi-source Complementary Heating System Optimization Of Northern Rural Independent Residence Based On Clean Energy Application

In the north,the main reason for fog haze is the heating mode which is mainly based on burning dispersed coal or firewood.In recent years,with the increasing severity of foggy haze in the heating season,the central and local pay high attention to the use of renewable energy to replace conventional power to achieve clean heating,renewable energy heating is the only way to achieve sustainable clean heating in China.This paper originates from the Chinese Government/World Bank/GEF-funded large-scale renewable energy development project,which is undertaken by the Qingdao University of Technology,which focuses on the development and incentive policy research of a high proportion renewable energy complementary heating system in the north.In this paper,the solar-heat pump heating system for rural independent dwellings in north China is proposed,which combines the advantages of solar energy and heat pump,effectively solves the problems of energy waste and pollution in the heating process of rural independent dwellings,and has great significance for improving the life style of rural residents.Firstly,the performance of each equipment is analyzed,and a multi-source complementary heating system suitable for rural independent dwellings in cold area and cold area of North China is constructed.By analyzing the factors such as energy consumption and efficiency of each equipment,combined with peak-Valley electricity price,the operation mode of Night heat pump combined electric heater and proper heat storage is proposed.On this basis,the influence factors of the performance and efficiency of solar collectors,air source heat pumps,soil source heat pumps,buried pipes and water storage tanks are analyzed,and the mathematical model of transient calculation is established.Secondly,on the basis of building load simulation calculation,the dynamic simulation model of solar-heat pump heating system is established by using Trnsys software,and the simulation results are combined with economic analysis.System optimization is the minimum cost year(annual operation cost + investment annual value)to optimize the target,change the system of different heat source equipment ratio and control temperature,compare the simulation results to obtain the system optimal ratio and optimal control mode.At last,we take the rural independent dwellings in northeast,north China and northwest China as the research object,and analyze the applicability of typical scenario on the basis of the optimization calculation.In view of the rural independent dwellings in different regions,this paper studies the economic and environmental performance of the solar-heat pump coupled heating system under the condition of different solar collectors ' cost,different electricity price and different loan interest rate,and provides the basis for the construction,operation and application of the Multi-Source complementary heating system.