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http://dx.doi.org/10.17664/ksgee.2020.16.3.008

Heating Performance Analysis of Ground-Source Heat Pump (GSHP) System using Hybrid Ground Heat Exchanger (HGHE)  

Sohn, Byonghu (Green Building Research Center, KICT)
Publication Information
Journal of the Korean Society for Geothermal and Hydrothermal Energy / v.16, no.3, 2020 , pp. 8-16 More about this Journal
Abstract
This paper presents the heating performance analysis results of a ground-source heat pump (GSHP) system using hybrid ground heat exchanger (HGHE). In this paper, the HGHE refers to the ground heat exchanger (GHE) using both a surface water heat exchanger (SWHE) and a vertical GHE. In order to evaluate the system performance, we installed monitoring sensors for measuring temperatures and power consumption, and then measured operation data with 4 different load burdened ratios of the HGHE. During the entire measurement period, the average heating capacity of the heat pump was 37.3 kW. In addition, the compressor of the heat pump consumed 9.4 kW of power, while the circulating pump of the HGHE used 6.7 kW of power. Therefore, the average heating coefficient of performance (COP) for the heat pump unit was 4.0, while the system including the circulating pump was 2.7. Finally, the parallel use of SWHE and VGHE was beneficial to the system performance; however, further researches are needed to optimize the design data for various load ratios of the HGHE.
Keywords
Ground-source heat pump; Hybrid ground heat exchanger; Surface water heat exchanger; Vertical GHE; Heating performance; Measurement;
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Times Cited By KSCI : 4  (Citation Analysis)
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1 Cabeza, L. and Chafer, M., 2020, Technological options and strategies towards zero energy buildings contributing to climate change mitigation: A systematic review, Energy and Buildings, Vol. 219, pp. 1-46.
2 Kavanaugh, S. and Rafferty, K., 2014, Geothermal Heating and Cooling: Design of Ground-Source Heat Pump Systems, ASHRAE, Atlanta.
3 Javadi, H., Ajarostaghi, S., Rosen, M. A., and Pourfallah, M., 2019, Performance of ground heat exchangers: A comprehensive review of recent advances, Energy, Vol. 178, pp. 207-233.   DOI
4 Lund, J. W. and Boyd, T. L., 2016, Direct utilization of geothermal energy 2015 worldwide review, Geothermics, Vol. 60, pp. 66-93.   DOI
5 Anderson, A. and Rezaie, B., 2019, Geothermal technology: Trends and potential role in sustainable future, Applied Energy, Vol. 248, pp. 18-34.   DOI
6 Korea Energy Agency, 2019, New & Renewable Energy Statistics 2018(2019 Edition), pp. 34-37.
7 Mitchell, M. and Spitler, J., 2014, Open-loop direct surface water cooling and surface water heat pump systems-A review, HVAC&R Research, Vol. 19, pp. 125-140.
8 Hattemer, B. and Kavanaugh, S., 2005, Design temperature data for surface water heating and cooling systems, ASHRAE Transactions, Vol. 111, pp. 695-701.
9 Chiasson, A., Spitler, J., Rees, S., and Smith, M., 2000, A model for simulating the performance of shallow pond as a supplemental heat rejecter with closed-loop ground-source heat pump systems, ASHRAE Transactions, Vol. 106, pp. 107-121.
10 Zou, S. and Xie, X., 2017, Simplified model for coefficient of performance calculation of surface water source heat pump, Applied Thermal Engineering, Vol. 112, pp. 201-207.   DOI
11 Lv, N., Zhang, Q., Chen, Z., and Wu, D., 2017, Simulation and analysis on the thermodynamic performance of surface water source heat pump system, Building Simulation, Vol. 10, pp. 65-73.   DOI
12 Chen, X., Zhang, G., Peng, J., Lin, X., and Liu, T., 2006, The performance of an open-loop lake water heat pump system in south China, Applied Thermal Engineering, Vol. 26, pp. 2255-2261.   DOI
13 Schibuola, H. and Scarpa, M., 2016, Experimental analysis of the performances of a surface water source heat pump, Energy and Buildings, Vol. 113, pp. 182-188.   DOI
14 Do, S. L. and Haberl, J., 2016, Development and verification of a custom-built ground heat exchanger model for a case study building, Energy and Buildings, Vol. 119, pp. 242-255.   DOI
15 Sohn, B., 2016, Preliminary analysis on design parameters and application effects of surface water heat exchanger (SWHE), Transactions of the Korea Society of Geothermal Energy Engineers, Vol. 12, No. 3, pp. 24-32.   DOI
16 Lim, H. J., Kong, H. J., Sohn, B. 2017, Cooling performance of geothermal heat pump using surface water heat exchanger, Korean Journal of Air-Conditioning and Refrigeration Engineering, Vol. 29, No. 6, pp. 316-326.   DOI
17 Gaia Geothermal, 2017, Ground Loop Design (GLD) Manual, Gaia Geothermal.
18 Sohn, B., 2018, Cooling performance analysis of ground-source heat pump (GSHP) system with hybrid ground heat exchanger (HGHE), Transactions of the Korea Society of Geothermal Energy Engineers, Vol. 14, No. 4, pp. 43-52.   DOI
19 Luo, J., Luo, Z., Xie, J., Xia, D., Huang, W., Shao, H., Xiang, W., and Rohn, J., 2018, Investigation of shallow geothermal potentials for different types of ground source heat pump systems (GSHP) of Wuhan city in China, Renewable Energy, Vol. 118, pp. 230-244.   DOI
20 DesignBuilder, 2019, DesignBuilder V6 Simulation Documentation, DesignBuilder Software Ltd.
21 Kline, S. J., 1985, The purpose of uncertainty analysis, J. Fluids Engineering, Vol. 107, pp. 153-160.   DOI