한랭지(몽골) 지열 히트펌프 시스템의 난방 성능 분석

• Published in: 설비공학 논문집, 27(1) Vol. 27; no. 1; pp. 31 - 38
• Main Authors: 손병후(Byonghu Sohn), 최재호(Jae Ho Choi), 민경천(Kyung Chon Min)
• Format: Journal Article
• Language: Korean
• Published: 대한설비공학회 2015
• Subjects: 기계공학; Cold climate region(한랭지); Mongolia(몽골); Heating performance(난방 성능); Geothermal heat pump system(지열 히트펌프 시스템); Residential building(단독주택)
• ISSN: 1229-6422; 2465-7611
• DOI: 10.6110/KJACR.2015.27.1.031

Geothermal heat pump (GHP) systems have become an efficient alternative to conventional cooling and heating methods due to their higher energy using efficiency. These systems use the ground as a heat source in heating mode operation and a heat sink in cooling mode operation. The aim of this study is to evaluate the heating performance of the GHP system for a residential building ($420m^2$) in Ulaanbaatar, Mongolia. In order to demonstrate the feasibility of a sustainable performance of this system, we installed the water-to-water geothermal heat pump with ten vertical ground heat exchangers and measured operation parameters from October 19, 2013 to March 26, 2014. The results showed that the entering source temperature of brine from the ground heat exchangers was in a range of the design target temperature of $-10^{\circ}C$ for heating. For total values of the representative results, the ground heat exchangers extracted heat of 53.51 MWh from the ground. In addition, the GHP system supplied heat of 83.55 MWh to the building and consumed power of 30.27 MWh. Consequently, the average heating seasonal performance factor ($SPF_h$) of the overall system was evaluated to be 2.76 during the measurement period of the heating season.