Exergy Analysis Of Compressed Air Energy Storage System Integrated With Absorption Chiller

The vigorous development of renewable energy to ease the pressure of traditional energy sources,but its own volatility and instability of the characteristics result in the abandoned of the wind phenomenon,China's annual economic losses caused by this phenomenon is considerable.At the same time,China's current peak-valley difference in the power grid is very large,the peak period of power cuts to human life has brought great inconvenience,while the low tide of excess electricity has caused a waste of energy.Compressed air energy storage system has become a research hotspot because of its high stability,low investment cost and high operation efficiency.The traditional compressed air energy storage system is in low overall efficiency of the system because of the process of running part of the energy waste and other problems resulting.In order to solve this problem,this paper presents a method to improve the overall efficiency of the system by taking advantage of the compression heat of the compressed air energy storage system as a prototype of Huntorf power station in Germany.In this paper,Aspen Plus software is used to simulate the system and thermodynamic analysis and sensitivity analysis of the simulation results.Based on the existing data,this paper simulates the operation of Huntorf power plant,and analyzes the factors that affect the system in the compressed air energy storage system.Then,based on the simulation results of the compressed air energy storage system,the simulation parameters of the refrigeration system are obtained by theoretical calculation.The effect of parameters on the refrigeration system was also discussed.At last,an integrated scheme of combined operation of compressed air energy storage system and lithium bromide absorption refrigeration system is proposed.The thermodynamic simulation of the combined operation system is established and the analysis and sensitivity analysis are carried out.The results show that the efficiency of combined operation system of compressed air energy storage system and absorption refrigeration system is 0.88% higher than that of the original system.The efficiency of the combined operation system is affected by the adiabatic efficiency of the compressor and the cooling water import and export temperature.The influence of the cooling water inlet and outlet temperature and the evaporation temperature of the cooling system have little effect on the efficiency of the combined operation system.