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2018 Vol.12, Issue 4 Preview Page

Research Article

Heat Transfer of Polyolefin Covered STS Corrugated Tube for Surface Water Source Heat Pump

수열원 히트펌프용 열가소성수지 코팅 STS주름관의 열관류 특성

Gun-Joo Jung1
,
Kyu-Nam Rhee1*
,
Xinwen Zhang2
정 근주1
,
이 규남1*
,
장 형문2
1Department of Architectural Engineering, Pukyong National University
2Graduate School, Department of Architectural Engineering, Pukyong National University
1부경대학교 건축공학과
2부경대학교 건축공학과 대학원
* Corresponding Author
31 August 2018. pp. 326-335
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Abstract

Recently, high density poly ethylene (HDPE) tube has been utilized in surface water source heat pump (SWSHP) as a surface water heat exchanger (SWHE). Stainless steel (STS) corrugated tube has much higher heat transfer coefficient (U value) than HDPE tube in SWHE. However, this material cannot be perfectly protected from corrosion when exposed to aggressive water environments. The goal of this work is to increase U value of SWHE when STS corrugated tube is perfectly protected from corrosion by covering polyolefin material on its corrugated surface. In order to verify the thermal performance of proposed tube, U values and friction factors of the proposed tube were compared with those of the HDPE tube. For the evaluation on possible applicability of proposed tube, the economic evaluation of the proposed tube was also performed based on the result from test bed experiments. The results show that the proposed tube leads to 4.65 times higher U value and 2 times higher friction factor than HDPE smooth tube. Despite with the increased friction loss and installation cost, it was revealed that the proposed tube can achieve COP due to enhanced heat transfer performance.

Keywords
Surface water source heat pump (SWSHP)
Heat transfer coefficient (U value)
COP
Polyolefin covered STS corrugated tube (POCCT)

키워드
수열원히트펌프
열관류율
성적계수
열가소성수지피복주름관
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Information
  • Publisher :Korean Institute of Architectural Sustainable Environment and Building Systems
  • Publisher(Ko) :한국건축친환경설비학회
  • Journal Title :Journal of Korean Institute of Architectural Sustainable Environment and Building Systems
  • Journal Title(Ko) :한국건축친환경설비학회논문집
  • Volume : 12
  • No :4
  • Pages :326-335
  • Received Date : 2018-04-30
  • Revised Date : 2018-07-02
  • Accepted Date : 2018-07-14
  • DOI :https://doi.org/10.12972/jkiaebs.20180028
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