All Issue

2019 Vol.39, Issue 1 Preview Page

Research Article

Analysis on the Effect of Local Climate on the Unit-type Ground Heat Exchanger

지역 기후가 유닛형 지중열교환기 성능에 미치는 영향

Sangmu Bae1
,
Jae-Min Kim2
,
Yujin Nam3*
배 상무1
,
김 재민2
,
남 유진3*
1Department of Architectural Engineering, Pusan National University, Doctor's Course
2Department of Architectural Engineering, Pusan National University, Master's Course
3Department of Architectural Engineering, Pusan National University, Associate Professor
1부산대학교 건축공학과, 박사과정
2부산대학교 건축공학과, 석사과정
3부산대학교 건축공학과, 부교수
*Corresponding Author 
28 February 2019. pp. 67-76
PDF XML Citation
Abstract

A ground source heat pump (GSHP) system can stable system operation by using underground heat source and has high reliability for energy production. However, wide-spread of the GSHP system is delayed to high initial investment costs. In previous studies, horizontal and unit-type ground heat exchanger (GHX) have developed to overcome disadvantages such as high initial cost. However, these performances of GHXs are greatly influenced by climate and weather conditions. It is necessary to analyze the performance of GHX according to the ground temperature change in the installation site. In this study, the ground temperature of each installation site confirmed and performance of unit-type GHX quantitatively analyzed by numerical analysis. As the result, the performance of the unit type GHX was 33.9 W/m in Seoul, 34.2 W/m in Daejeon, and 37.2 W/m in Busan.The result showed the difference performance of GHX according to local climate was maximum of 9.7%.

Keywords
Ground source heat pump system
Unit-type ground heat exchanger
Local climate
Numerical analysis

키워드
지열 히트펌프 시스템
유닛형 지중열교환기
지역 기후
수치해석
References
1
Oh, J. h., Seo, J. H., and Nam, Y. J., Performance Analysis of a Low-depth Unit-type Ground Heat Exchanger using Numerical Simulation, Korean Journal of Air-Conditioning and Refrigeration Engineering, Vol. 27, No. 3, pp. 169-173, 2015.
10.6110/KJACR.2015.27.3.169
2
Kim, M. J., Lee, S. R., Yoon, S., and Jeon, J. S., Suggestions of Design Method for a Horizontal Straight Ground Heat Exchanger, Transactions of the Korea society of Geothermal Energy Engineers, Vol. 12, No. 4, pp. 1-7, 2016.
3
Sohn, B. H., Effect of Soil Thermal Conductivity and Moisture Content on Design Length of Horizontal Ground Heat Exchanger, Transactions of Korea society of Geothermal Energy Engineers, Vol. 8, No. 1, pp. 21-31, 2012.
4
Pu, L., Xu, L., Qi, D., and Li, Y., Structure Optimization for Horizontal Ground Heat Exchanger, Applied Thermal Engineering, Vol. 136, pp. 131-140, 2018.
10.1016/j.applthermaleng.2018.02.101
5
Sohn, B., Performance Analysis of Ground-Coupled Heat Pump System with Slinky-Type Horizontal Ground Heat Exchanger, Korean Journal of Air-Conditioning and Refrigeration Engineering, Vol. 24, No. 3, pp. 230-239, 2012.
10.6110/KJACR.2012.24.3.230
6
Yoon, S. and Lee, S., Analysis of Construction Cost and Influence Factors on Horizontal Ground Heat Exchangers, New & Renewable Energy, Vol. 10, No. 3, pp. 6-13, 2014.
10.7849/ksnre.2014.10.3.006
7
aili, N., Hazami, M., Attar, I., and Farhat, A., In-field Performance Analysis of Ground Source Cooling System with Horizontal Ground Heat Exchanger in Tunisia, Energy, Vol. 61, pp. 319-331, 2013.
10.1016/j.energy.2013.08.054
8
Oh, J. H. and Nam, Y., The Performance Analysis for Low-depth Unit-type Ground Heat Exchanger according to Grouting Materials, Transactions of the Korea Society of Geothermal Energy Engineers, Vol. 11, No. 2, pp. 7-11, 2015.
10.17664/ksgee.2015.11.2.007
9
Kim, J. M., Bae, S., and Nam, Y. J., Performance and Feasibility Analysis on the Unit-Type Ground Heat Exchanger under a Building, Korean Journal of Air-Conditioning and Refrigeration Engineering, Vol. 30, No. 5, pp. 228-236, 2018.
10.6110/KJACR.2018.30.5.228
10
Bae, S., Kim, H., Jeon, J. Y., and Nam, Y., Sensitivity Analysis of the Design Factor for Vertical Closed-loop Geothermal System using Numerical Analysis -Focused on Heating Operation-, KIEAE Journal, Vol. 18, No. 5, pp. 55-61, 2018.
10.12813/kieae.2018.18.5.055
11
Bae, S., Feasibility analysis and Performance Prediction of Ground Source Heat Pump System using Deep Ground Heat Exchanger, Master Thesis, Pusan National University, Korea, 2017.
12
Nam, Y., Ooka, R., and Hwang, S., Development of a Numerical Model to Predict Heat Exchange Rates for Ground-source Heat Pump System, Energy and Buildings, Vol. 40, pp. 2133-2140, 2008.
10.1016/j.enbuild.2008.06.004
Information
  • Publisher :Korean Solar Energy Society
  • Publisher(Ko) :한국태양에너지학회
  • Journal Title :Journal of the Korean Solar Energy Society
  • Journal Title(Ko) :한국태양에너지학회 논문집
  • Volume : 39
  • No :1
  • Pages :67-76
  • Received Date : 2019-01-14
  • Revised Date : 2019-01-07
  • Accepted Date : 2019-02-11
  • DOI :https://doi.org/10.7836/kses.2019.39.1.067
Journal Informaiton Journal of the Korean Solar Energy Society Journal of the Korean Solar Energy Society
Online Submission
  • NRF
  • KOFST
  • crossref crossmark
  • crossref cited-by
  • crosscheck
  • orcid
  • open access
  • ccl
Journal Informaiton Journal Informaiton - close