공기 액화 에너지 저장 장치 발전시스템에 관한 실험적 연구

Abstract

An experimental study was conducted in a university lab scale to evaluate the power generation performance of a liquid air energy storage system. The experimental setup consists of a liquid nitrogen tank, evaporator, and a Tesla turbine. The experiment was conducted using liquid nitrogen instead of liquid air due to the similarity in thermal properties. First, evaporator test was conducted and it was observed that the evaporator outlet temperature was maintained for at least a half an hour. As a result of a power generation experiment, it succeeded in generating 30W of power, and the time to reach the maximum power was observed to be in 2.6 minutes. The change in generated power with respect to liquid nitrogen mass flow rate was also measured, and it was shown that the generated power increased linearly with respect to the mass flow rate of liquid nitrogen. From this study, it was shown that the response time of the liquid nitrogen power generation system can be quite fast, and the potential of applying cryogenic power generation system as a reserve power is also high.