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http://dx.doi.org/10.3795/KSME-C.2016.4.1.043

A Study on Regional Distribution of the Ground Effective Thermal Conductivity  

Kong, Hyoung Jin (Geothermal Energy Education Center, Hoseo Univ.)
Kwon, Soon-Ki (Dept. of Mechanical Engineering, Hoseo Univ.)
Ji, Seung Gyu (New & Renewable Energy Center, Korea Energy Agency)
Publication Information
Transactions of the KSME C: Technology and Education / v.4, no.1, 2016 , pp. 43-47 More about this Journal
Abstract
Ground source heat pump(GSHP) systems is known as environmental friendly and energy saving. Especially a ground heat exchanger is an important unit that determines the thermal performance of a system and initial cost. In design phase of vertical GSHP system, it is recommended that the effective borehole thermal resistance, be determined from in-situ thermal response test. In this study, ground effective thermal conductivity was categorized by a region. As a result of the study, the ground thermal conductivity of national average was analyzed as 2.56 W/mK. The highest regional average of thermal conductivity is 2.68 W/mK in Seoul, and the lowest is 2.28 W/mK in Busan. Also, the thermal conductivity on the coast has been analyzed approximately 30% lower than the average.
Keywords
Ground Source Heat Pump System; Vertical Ground Heat Exchanger; Thermal Response Test;
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