Performance Study of Air Compressor Station Supply System Based on Low-Temperature Waste Heat Refrigeration and Gas Storage Pressure Stabilization

In compressed air energy storage systems, the air compression process generates a significant amount of heat. However, if this heat is not effectively utilized, it will result in a decrease in the round-trip efficiency of the system and an increase in energy loss. Absorption refrigeration utilizes thermochemical working fluids to convert thermal energy into cooling energy, allowing the waste heat from the liquefaction stage to drive the absorption refrigeration system. This paper investigates the impact of varying compressor air volumes over time on energy consumption, as well as the effect of different waste heat temperatures on the system’s coefficient of performance. It also conducts a comparative analysis of energy consumption, cooling capacity, and compressor energy consumption before and after optimization. The results indicate that fluctuations in compressor air volume over time lead to variations in energy consumption; compared to traditional systems, the optimized system reduces compressor energy consumption by 13.5%, increases cooling capacity by 38.3%, and decreases the specific energy consumption per unit of gas by 14.6%. When the waste heat temperature reaches 64 ℃, the system’s coefficient of performance tends to stabilize.