Earticle

초록

영어

Ground-Source heat pump(GSHP) system uses geothermal energy to provide space cooling or heating. GSHP makes use of energy stores in ground as heat source or heat sink. It is more energy-efficient way of heating and cooling buildings. That is because ground temperature is lower than air temperature in summer time, and higher than air temperature in winter time. Moreover, ground temperature always keep stable during years. But, when the GSHP system runs long time, ground temperature will be changed. and the performance of the GSHP system will be affected. GSHP also can be used as domestic hot water(DHW) system. But the lower temperature of the heat source makes it difficult to get high temperature hot water. Therefore, a GSHP Cooling & DHW combination system was proposed in this study. In the proposed combination GSHP system the condensation heat from the condenser of GSHP cooling system is reused as the heat source of the DHW heat pump. Hence the drop in ground temperature caused by the long time operation of GSHP cooling system will be improved. In order to evaluate the performance of the combination GSHP system, mock-up experiments were conducted. as comparison, the performance of GSHP cooling-only system and GSHP DHW-only system in the same experimental conditions were evaluated too. As experimental results, the coefficient of performance(COP) of the cooling heat pump of the combination system is about 12.93% higher than GSHP cooling-only system, and the COP of the DHW heat pump of the bombination system is about 15.47% higher than GSHP DHW-only heat pump system.

목차

Abstract
1. 서론
2. 냉방-급탕 복합형 GSHP 시스템 운전방식
2.1 GSHP 개요 및 운전방식
2.2 냉방-급탕용 복합형 GSHP 운전방식
3. 실험시스템 구성 및 실험 조건
3.1 실험 시스템 구성
3.2 실험 조건
4. 실험 결과 및 해석
4.1 실험에서의 온도 및 유량 제어
4.2 GSHP시스템의 단독 냉방운전 실험결과
4.3 GSHP 시스템의 단독 급탕운전 실험결과
4.4 냉방-급탕용 복합형 GSHP시스템 성능검증 실험결과
5. 결론
REFERENCES

저자

• 장형문 [ Zhang Xinwen | 부경대학교 건축공학과 대학원, 박사과정 ]
• 이규남 [ Rhee, Kyu-Nam | 부경대학교 건축공학과 조교수, 공학박사 ]
• 정근주 [ Jung, Gun-Joo | 부경대학교 건축공학과 교수, 공학박사 ] Corresponding Author

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