Operation Optimization Research Of Solar Cooling,Heating And Power Cogeneration System

With the rapid development of industry and economy,the world’s energy problems have become increasingly prominent,fossil energy has been exhausted,and environmental pollution has become increasingly serious.In order to build a green,energy-saving,environmentally friendly and sustainable country,how to reduce the consumption of fossil fuels and improve the utilization efficiency of primary energy is the main problem facing our country.The combined cooling,heating and power system has the advantages of low energy consumption and low pollution,and at the same time can improve the energy utilization rate,so it has attracted much attention.In this paper,the solar photovoltaic solar panel is combined with the cooling,heating and power cogeneration system to make full use of solar energy resources,and the gas turbine is used as the prime mover to generate electricity.The heat is converted into high-grade electricity,which further realizes the cascade utilization of energy,improves the utilization efficiency of energy,and avoids the waste of resources.Since the climatic environment will have a certain impact on the performance of the system,the system is applied in five representative cities(Kunming,Guangzhou,Changsha,Beijing and Harbin)in a regional building(including shopping malls,hotels and office buildings).De ST is used to simulate and calculate the cooling,heating and electric loads of buildings in five urban areas.Combined with the optimized particle swarm algorithm,from the perspectives of energy saving,environmental protection and economy,comprehensively compare the operating performance of the system.The research results show that: 1)Taking the equipment output of typical buildings in Changsha City as an example,the newly proposed operation strategy can effectively reduce the fuel consumption of supplementary combustion boilers and the power consumption of electric refrigerators;2)The primary energy consumption rate(PESR),carbon dioxide emission reduction rate(CDERR)and cost saving rate(ACSR)of the representative cities in the five climate regions are obtained.Among them,the PESR value and CDERR value of Harbin are the largest,which are 0.42 and 0.55 respectively;3)Comprehensive comparison showed that thermal load have a positive impact on system performance,while the cooling load have a negative impact on the performance of the system.The city with a larger cooling load has less obvious advantages of the system;4)Compared with the sub-supply system,the solar cooling,heating and power cogeneration system has an average performance in the five representative cities.It can effectively reduce the emission of pollutants,and the environmental protection performance is the best,followed by energy saving,and the economy of the system is poor.