이산화탄소를 적용한 열펌프의 성능향상에 관한 시뮬에이션 연구

The performance of a heat pump using CO₂ is predicted and analyzed by using a cycle simulation model developed in this study. Cycle simulations are conducted by varying design parameters and operating conditions with applications of advanced techniques to improve system performance. The applied advanced methods in the simulations are internal heat exchanger, expander, and 2-stage compression with intercooling. As a result, the applications of advanced techniques yield a 8~26% heating performance improvement and 20~30% cooling performance improvement over the basic cycle.