논문 해외 국제전문학술지(SCI급) STUDY ON THE LWT CONTROL SCHEMES OF A HEAT PUMP FOR HOT WATER SUPPLY
- 학술지 구분 국제전문학술지(SCI급)
- 게재년월 2013-06
- 저자명 최종민
- 학술지명 RENEWABLE ENERGY
- 발행처명 PERGAMON-ELSEVIER SCIENCE LTD
- 발행국가 해외
- 논문언어 외국어
- 전체저자수 1
홈페이지논문 초록 (Abstract)
Heat pump systems have been widely used in buildings and industries due to their high performance. In this study, a leaving watertemperature control scheme has been proposed for a water-to-water heat pump for h ot water supply. The study was focused on the following four schemes: (1 ) using an auxiliary electric heater, (2) varying compressor speed, (3) adjusting water flow rate, and (4) adding heat to the secondary fluid flow of the heat source. With schemes (2) and (3), the system showed higher performance than other schemes. However, scheme (2) could not attain the appropriate LWT at low EWT heat source conditions. For al l EWT conditions, using schemes (3) and (4) enabled the system to reac h an appropriate LWT. Scheme (4) can be adopted as the best technology to control LWT, because it is not easy to vary flow rate of the seconda ry fluid as in scheme (3). (C) 2012 Elsevier Ltd. All rights reserved.