Research On Application Of Ashp And Gas Boiler In Qingdao

With the development of economy and society,the traditional heating energy is used in large quantities,the environmental problems are becoming more and more obvious,and the haze is becoming more and more serious,which needs to be solved urgently.In this context,this paper proposes to use air source heat pump and gas boiler coupled heating system for residential district heating in Qingdao.This paperintroduces the working principle and performance of air source heat pump and gas boiler,points out the deficiency of these two heating systems when heating separately,and establishes the coupled heating system of air source heat pump and gas boiler.Combined with the heating characteristics of the two heating modes,the basic heating mode of air source heat pump and gas boiler is determined,and the form,operation mode and control strategy of the heating system are introduced.Secondly,taking 150000 square meters residential district in Qingdao as the research object,the building load is simulated by De ST load energy consumption simulation software to determine the annual hourly heating load of the building.Combined with the air source heat pump and gas boiler coupled heating system diagram on the TRNSYS platform,the coupling heating system is optimized with the instantaneous simulation model of the coupling heating system with the lowest annual cost as the optimization goal.When the air source heat pump accounts for 60%of Prida in the coupled heating system with gas boiler,the annual cost is the lowest and the economy is the best.In order to compare the multi-heat source combined heating system with the traditional heat source system,this paper uses the two-stage fuzzy comprehensive evaluation method to calculate and evaluate three types of heating systems:single air source heat pump low temperature radiation heating system,single gas boiler low temperature radiation heating system,air source heat pump and gas boiler coupled low temperature radiation heating system.Considering three factors:economicbenefit,energy consumption and environmental influence,the heat source configuration of coupled heating system of air source heat pump and gas boiler is optimized,and the heat source configuration scheme of heating system with good economic benefit,low energy consumption and little impact on the environment is obtained.The results show that the air source heat pump heating system coupled with gas-fired boiler is the best,and the single air source heat pump heating system is the worst.It provides a reference for the application of coupled heating system of air source heat pump and gas boiler in Qingdao area.