The performance of a heat pump using river water as a heat source was compared with that of a conventional air-conditioner for cooling and a boiler system for heating. The heat pump system using river water considered the 1-stage cycle for cooling and the 2-stage cycle for heating. The COPs of the river water source heat pump were 0.5-1.1 higher than those of the conventional system in the cooling season. The LCC of the river water source heat pump system was lower 13.5% and 32.4% than that of the conventional system Ⅰand Ⅱ. In addition, when the initial cost ratios of the river water source heat pump system to the conventional system Ⅰand Ⅱ were less then 1.2 and 1.4, respectively, An acceptable payback was found to be less than 5 years.

Abstract
 1. 서론
 2. 하천수 열원 열펌프 시스템
  2.1 하천수 열원 특성
  2.2 하천수 열원 열펌프 시스템 모델링
 3. 경제성 평가 결과
 4. 결론
 후기
 참고문헌

• 박차식(호서대학교 자동차공학과) | C. S. PARK 교신저자
• 안태길(호서대학교 자동차공학과) | T. K. AHN
• 김영우(호서대학교 자동차공학과) | Y. W. KIM