Measurement and Verification of Integrated Ground Source Heat Pumps on a Shared Ground Loop

Jeong Soo Shin, Jong Woo Park and Sean Hay Kim
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Jeong Soo Shin: J&G Co., Ltd., Jeonju 55070, Korea
Jong Woo Park: J&G Co., Ltd., Jeonju 55070, Korea
Sean Hay Kim: School of Architecture; Seoul National University of Science & Technology; Seoul 01811, Korea

Energies, 2020, vol. 13, issue 7, 1-24

Abstract: We propose an integrated geothermal system that consists of air-conditioning and hot water service ground source heat pumps, both of which share a ground water loop. The proposed system increases the COP of the service hot water ground source heat pump by recovering the condensation heat of the air-conditioning ground source heat pump as an evaporator heat source for the hot water service ground source heat pump. Eventually this integration expands the scope and capacity of the evaporator source in addition to the underground water of heat exchangers, which also leads to increase the COP of the air-conditioning ground source heat pump. The integrated geothermal heat pump system was installed in a hotel, and then data were measured for a limited period due to the hotel’s ongoing business activities. A TRNSYS simulation model has been developed as a baseline, and the baseline has been calibrated with the measured data. By running one-year simulations, it turns out that the annual electricity use for heating and cooling, and service hot water was reduced by 19.1% in the cooling season, and by 9.6% in the heating season, with respect to the conventional configuration in which the air-conditioning heat pump and hot water service heat pump work individually on their own ground loops.

Keywords: integrated ground source heat pumps; shared ground loop; waste heat recovery; multi- heat pumps; measurement and verification (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2020
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (6)

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