Research On The Optimal Configuration And Operation Of Integral Energy Based On CCHP System

The integrated energy configuration of CCHP can fully and effectively overcome the problems of single form of energy utilization,unable to flexibly meet the needs of users,etc.It can achieve a good combination with renewable energy,maximize the use of heat,cold energy and electric energy,reduce energy waste,and better serve China’s "double carbon" goal.It is of great practical significance for China to develop low-carbon economy and realize energy conservation and emission reduction.In this thesis,photovoltaic power generation is added as the energy input of the triple power supply system on the basis of the triple power supply system,and the cold,hot and power triple power supply system is established,and its comprehensive energy configuration is simulated and optimized.Firstly,a hotel in Weifang City was selected as the research object,and the De ST software was used to construct and simulate the hotel building model in combination with the building structure.The annual cooling,thermal and electricity load demand of the hotel building was obtained,and the cooling,thermal and electricity load demand of the typical day in each season was analyzed,and the maximum hourly cooling load value of the hotel was 1757.1k W.The annual hourly maximum thermal load is 1364.5k W,and the annual hourly maximum electrical load is 864.0k W.Secondly,the TRNSYS model of the system was built and verified with the experimental data.The errors of major key parameters such as power generation,natural gas flow rate,liner water inlet and outlet temperature,liner water flow rate,domestic hot water inlet and outlet temperature,and heating water inlet and outlet temperature were all within 5%,indicating that the TRNSYS model matched the actual model.Finally,the optimization model of the system is carried out,and the system operation strategy is formulated according to the comprehensive minimum of each operation mode under the hourly condition.The operating mode and the rated power of the generator set are taken as independent variables,and the comprehensive performance index is taken as the minimum for system optimization.The results show that when the capacity of the internal combustion engine is 550 k W,the comprehensive performance index of the system is 0.363 in the electric constant heat mode and 0.383 in the thermal constant heat mode,and the comprehensive performance of the system is the best.The integrated energy system established in this thesis is green and energy-saving,has high economic and ecological benefits,and has good guiding value for the coupling utilization of triple power supply system and solar energy.