Research on energy storage operation modes in a cooling, heating and power system based on advanced adiabatic compressed air energy storage

摘要

In this research, a cooling, heating and power system based on advanced adiabatic compressed air energy storage is proposed. To study the performance of the system in different energy storage operation modes, three modes, sliding pressure, constant sliding and constant pressure, are presented. By means of numerical simulation, the thermodynamic performance of all three modes are compared and analysed. The results show that the energy storage efficiency of the sliding-pressure mode is the highest, 51.48%, the thermal efficiency of the constant-sliding mode is the highest, 94.99%, and the energy storage density of the constant-pressure mode is the highest, 17.60 MJ center dot m(-3). Moreover, parameter analysis shows that the effectiveness of the heat exchanger, the maximum pressure ratio of the gas storage chamber and the ambient temperature have a great influence on the system performance. In addition, multi-objective optimization and optimization under variable operating conditions are carried out.