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Performance Evaluation and Economic Estimation of Ground Source Heat Pump Cooling and Heating System  

Lim Hyo Jae (호서대학교 기계공학과)
Song Yoon Seok (호서대학교 대학원)
Kong Hyoung Jin (호서대학교 대학원)
Park Seong Koo (㈜지오테크)
Publication Information
Journal of Energy Engineering / v.13, no.4, 2004 , pp. 296-300 More about this Journal
Abstract
Performance evaluation and economic estimation were conducted on the water to water GSHP (Ground Source Heat Pump) installed in existing building. Ground heat exchanger was a closed vertical loop type and sized to be 5 boreholes and 100m depth per borehole. Operation efficiency of the system shows that, COP increased from 3.0 to 4.2 with entering water temperature in heating operation, however, COP decreased from 5.0 to 3.7 in cooling operation. Economic estimation was analyzed by LCC (Life Cycle Cost) method and it showed that GSHP could save 68% of cost compare to the conventional oil source. Thus, despite of the large amount of initial cost, GSHP has a economic advantage to the other energy sources.
Keywords
Ground source heat pump; Ground heat exchanger; Coefficient of performance; Life cycle cost analysis;
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