• Journal of Soil and Groundwater Environment
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• v.14 no.3
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• pp.22-31
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• 2009

Recently use of renewable energies such as geothermal energy for space heating and cooling is increasing in Korea due to energy crisis and global warming. Ground source heat pump (GSHP) is known as one of the most environment-friendly HVAC (heating, ventilation and air-conditioning) systems in the world. However, some potential effects caused installation and operation of the GSHP systems on soil and groundwater environment are reported. The potential effects are closely related with inappropriate installation, operation and closure of the GSHP systems. In this paper, possible effects of the GSHPs on soil and groundwater environments are reviewed.

• Journal of the Korean Society for Geothermal and Hydrothermal Energy
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• v.18 no.4
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• pp.45-57
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• 2022

The Ministry of National Defense of the Republic of Korea is showing a lot of interest in net zero-energy buildings (NZEBs) to reduce energy consumption of military facilities and to promote green growth policy in military sector. The application of building passive technologies and renewable energies is essential to achieving NZEBs. This paper analyzed energy performance and energy cost on the conventional heating and cooling system (baseline scenario) and three different alternative scenarios (ALT 1, ALT 2 and ALT 3) applied in a hypothetical military building. A building modeling and simulation software (DesignBuilder V6.1) with EnergyPlus calculation engine was used to calculate the energy consumption for each scenario. Overall, when the GSHPs are applied to both space airconditioning and domestic hot water (DHW) production, Alt-2 and Alt-3, the amount of energy consumption for target building can be greatly reduced. In addition, when the building envelope performance is increased like Alt-3, the energy consumption can be further reduced. The annual energy cost analysis showed that the baseline was approximately 161 million KRW, while Alt-3 was approximately 33 million KRW. Therefore, it was analyzed that the initial construction cost increase could be recovered within about 6.7 years for ALT 3. The results of this study can help decision-makers to determine the optimal strategy for implementing GSHP systems in military buildings through energy performance and initial construction cost assessment.