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Simulation Study on the Performance Improvement of a Transcritical Carbon Dioxide Cycle  

조홍현 (고려대학교 기계공학과 대학원)
김용찬 (고려대학교 기계공학과)
서국정 (삼성전자(주))
Publication Information
Korean Journal of Air-Conditioning and Refrigeration Engineering / v.16, no.2, 2004 , pp. 158-166 More about this Journal
Abstract
The performance of a heat pump using $CO_2$ 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 the applications of advanced techniques to improve system performance. The applied systems in the simulations are internal heat exchanger, expander, and 2-stage compression with intercooling. As a result, the applications of advanced techniques improve the heating and cooling performances of the transcritical $CO_2$ cycle by 8∼26％ and 20∼30％, respectively, over the basic cycle.
Keywords
Carbon dioxide; Transcritical cycle; Expander; Internal heat exchanger; 2-stage compression-intercooling cycle;
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