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동계 매트형 수평형 지중 열교환기의 수직형 지중 열교환기와 비교 및 열적 성능 분석
이상하(Sang Ha Leigh),장휴산(Hyusan Jang),유석(Shuo Liu),이태하(Tae Ha Leigh),여명석(Myoung Souk Yeo) 대한설비공학회 2022 대한설비공학회 학술발표대회논문집 Vol.2022 No.6
국내에서 대부분의 지열 히트펌프는 수직형 지중 열교환기와 결합되어 사용 중이다. 수직형 지중 열교환기는 설치 시 천공을 뚫는데 큰 비용이 발생하는 데 비해, 수평형 지중 열교환기는 천부에 설치하므로 설치 비용이 비교적 적게 든다. 반면 수직형 지중 열교환기에 비해 외기의 영향을 받아 상대적으로 안정적인 성능을 내지 못하고, 넓은 대지 면적이 필요하다. 수평형 지중 열교환기 중 열교환 성능이 좋은 모세유관을 활용한 매트형 수평형 지중 열교환기의 수직형 지중 열교환기 대비 열적 성능을 알아보고자 하며, 시뮬레이션을 통해 비교 분석을 진행하였다. 본 연구에서 난방기 매트형 수평형 지중 열교환기 한 모듈의 지중 열교환 성능은 약 500W로 15m 수직형 지중 열교환기와 비슷하였다.
수평형 지중열교환기를 이용한 건물일체형 지열시스템의 도입타당성 분석
채호병(Chae Ho-Byung),남유진(Nam Yujin),윤성훈(Yoon Sung-Hoon) 한국태양에너지학회 2015 한국태양에너지학회 논문집 Vol.35 No.1
Recently, in order to prevent increasing energy usages in the international community, many countries have attempted to develop the innovative renewable energy systems. Among the renewable energy systems, Ground source heat pump(GSHP) system which supply the heating, cooling and hot water in the building has been attracted by its stability of heat production and high efficiency. However, the initial drilling costs become very expensive and the construction period takes longer the other systems, because GSHP system needs more than 100 m depth drilling. In this study, in order to reduce initial costs of the GSHP, the building integrated geothermal system using the horizontal heat exchanger was developed. The heating and cooling load in the standard housing model was calculated by a simulation and the system design capacity in the high-rise apartment was decided by the total load. Based on the system design capacity, the high-rise apartments were applied to a BIGS and vertical GSHP system and there are analyzed about initial costs. In the result, the initial cost of BIGS could reduce 24% of the initial cost of the vertical GSHP system.
손병후(Byonghu Sohn) 대한설비공학회 2012 설비공학 논문집 Vol.24 No.3
Ground-coupled heat pump (GCHP) systems utilize the immense renewable storage capacity of the ground as a heat source or sink to provide space heating, cooling, and domestic hot water. The main objective of the present study is to investigate the cooling and heating performance of a small scale GCHP system with horizontal ground heat exchanger (HGHE). In order to evaluate the performance, a water-to-air ground-source heat pump unit connected to a test room with a net floor area of 18.4 m2 and a volume of 64.4 m3 in the Korea Institute of Construction Technology (37°39?N, 126°48?E) was designed and constructed. This GCHP system mainly consisted of slinky-type HGHE with a total length of 400 m, indoor heat pump, and measuring devices. The peak cooling and heating loads of the test room were 5.07 ㎾ and 4.12 ㎾, respectively. The experimental results were obtained from March 15, 2011 to August 31, 2011 and the performance coefficients of the system were determined from the measured data. The overall seasonal performance factor (SPF) for cooling was 3.31 while the system delivered heating at a daily average performance coefficients of 2.82.
주상복합 건축물의 기초 슬래브에 설치된 수평형 지열교환기의 계절별 성능평가
황광일,우상우,김중헌,신승호,김용식,Hwang, Kwang-Il,Woo, Sang-Woo,Kim, Joong-Hun,Shin, Seung-Ho,Kim, Yong-Shik 한국태양에너지학회 2007 한국태양에너지학회 논문집 Vol.27 No.2
This study evaluates the seasonal performances of the horizontal-type geothermal heat exchanger(HGHEX) installed into the foundation slabs of the complex building located at Seoul. The geothermal system is consisted with totally 31,860m long HGHEX, 16 GSHPs (Ground-source Heat Pump) and 8 circulation pumps. This system supplies cooling and heating to the lobby(F1) and the common spaces(BF1). The average heat exchange temperature differences are $2.7^{\circ}C\;and\;2.5^{\circ}C$ in the summer, $1.5^{\circ}C\;and\;0.5^{\circ}C$ in the winter for the F1 and BF1 respectively. From these results, approximately 400Gcal and 180Gcal of geothermal energy are assumed to have been used during the summer and winter seasons respectively. As a conclusion, the geothermal system is reviewed as a effective utility for heating and cooling at the point of seasonal performances.
지중열 이동 시뮬레이션을 이용한 수평형 지열시스템의 채열성능 예측
남유진(Yujin Nam),채호병(Ho-Byung Chae) 대한설비공학회 2013 설비공학 논문집 Vol.25 No.6
The ground source heat pump (GSHP) system has attracted attention, because of its stability of heat production, and the high efficiency of the system. However, there are few studies on the prediction method of the heat exchange rate for a horizontal GSHP system. In this research, in order to predict the performance of a horizontal GSHP system, coupled simulation with a ground heat transfer model and a heat exchanger circulation model was developed, and calculation of heat exchange rate was conducted by the developed tool. In order to optimally design the horizontal GSHP system, the flow rate of circulation water, and the depth and buried spaces of heat exchangers were considered by the case study. As a result, the temperature of circulation water and the heat exchange rate of the system were calculated in each case.