Research On Solar-Driven Combined Cooling,Heating And Power Supply System

In recent years,under the dual pressure of fossil energy shortage and environmental problems,solar energy has gradually attracted people’s attention as a clean energy and renewable energy,and the distributed energy supply system based on solar energy has gradually become a research focus.This article focuses on solarpowered combined cooling,heating,and power systems,and aims to provide a reference for the application of solar energy in the field of distributed energy.First,the paper analyzes the integration principle,structural composition,and work flow of a solar-driven combined cooling,heating,and power system,and details the method for analyzing the thermodynamic performance of a combined supply system.Secondly,thermodynamic models were established for the three subsystems of the solar-driven combined cooling,heating and power system: trough solar heat collection system,organic Rankine cycle system,and absorption refrigeration system.The influence of solar radiation intensity,heat transfer oil inlet temperature,heat transfer oil flow rate and other factors on heat collection efficiency and tritium efficiency was analyzed for the trough solar heat collection system.The organic Rankine cycle system was analyzed for the selection of the circulating working medium and the evaporation temperature,temperature and temperature.When the factors such as heat and condensing temperature are changed,the power generation efficiency of the organic Rankine cycle system is changed.For the absorption refrigeration system,the static parameter model analysis method is used to calculate its thermodynamic performance.Thirdly,taking an office building in Beijing as the target case,DeST software was used to simulate the typical daily and hourly load of the case in summer and winter,and the main equipment of the combined heat and power system was designed and calculated.On this basis,the thermodynamic performance of the cogeneration system under summer cooling conditions and winter heating conditions is analyzed.Finally,the operating characteristics of the solar-driven combined cooling,heating and power system under changing conditions in summer and winter are analyzed,and the results show that under summer conditions,the temperature of the heat transfer oil at the outlet of the solar collector of the combined supply system is maintained at 200 to 220 °,the system’s operation is better.In winter,the change of solar radiation intensity has little effect on the thermodynamic performance of the cogeneration system.