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Boahen, Samuel,Lee, Kwang Ho,Cho, Soolyeon,Choi, Jong Min World Scientific Publishing Company 2017 International Journal of Air-Conditioning and Refr Vol.25 No.3
<P>Heating and cooling systems contribute greatly to the energy consumption and CO<SUB>2</SUB> emissions of many countries. Ground source heat pumps (GSHP) are promising energy saving systems for residential, commercial or industrial heating or cooling purposes. A method to estimate the energy consumption and CO<SUB>2</SUB> emission of GSHPs is therefore very eminent. This paper reviews the methodology to calculate the energy consumption and CO<SUB>2</SUB> emission of GSHPs. The discussed methodology is then used to compare the energy consumption and CO<SUB>2</SUB> emission of an open-loop and closed-loop GSHP using data from field test. It is observed that the open-loop GSHP saves 28% energy and reduces CO<SUB>2</SUB> by 28% than the closed-loop GSHP in the cooling season. When used for both cooling and heating purposes in the year, the open-loop GSHP saves about 6% energy and reduces about 6% of CO<SUB>2</SUB> emission than the closed-loop GSHP.</P>
다양한 운전모드에서 물대물 열펌프의 성능 및 최적충전량변화에 관한 연구
Samuel Boahen,이광호,최종민 한국 지열 · 수열에너지학회 2018 한국지열에너지학회논문집 Vol.14 No.2
As heat pump application has been extending to residential, commercial, and industrial fields, the heat pump should have many operation modes. It is required to optimize refrigerant charge amount at all operation modes in order to enhance the annual performance of heat pumps. In this study, the performance analysis of the heat pump which has cooling, heating, cooling-hot water, heating-hot water, and hot water modes was executed with the variation of refrigerant charge amount. As the refrigerant charge amount changed, the maximum COPs of the heat pump at different operation modes were changed within ± 10%. Therefore, it is highly recommended to select optimum charge amount for the heat pump based on the analysis of annual load for each operation modes.