Journal of the Korean Solar Energy Society (한국태양에너지학회 논문집)

The Korean Solar Energy Society (한국태양에너지학회)
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CFD Analysis on the Heat Transfer Performance with Various Obstacles in Air Channel of Air-Type PV/Thermal Module

공기식 태양광/열 시스템 공기채널 내 여러 저항체 설치에 따른 전열성능에 관한 CFD 해석

  • Choi, Hwi-Ung (Graduate School of Refrigeration and Air-conditioning Engineering, Pukyong National University) ;
  • Fatkhur, Rokhman (Graduate School of Refrigeration and Air-conditioning Engineering, Pukyong National University) ;
  • Kim, Young-Bok (Dept. of Mechanical System Engineering, Pukyong National University) ;
  • Yoon, Jung-In (Dept. of Refrigeration and Air-conditioning Engineering, Pukyong National University) ;
  • Son, Chang-Hyo (Dept. of Refrigeration and Air-conditioning Engineering, Pukyong National University) ;
  • Choi, Kwang-Hwan (Dept. of Refrigeration and Air-conditioning Engineering, Pukyong National University)
  • 최휘웅 (부경대학교 냉동공조공학과 대학원) ;
  • 파쿠르 로커만 (부경대학교 냉동공조공학과 대학원) ;
  • 김영복 (부경대학교 기계시스템공학과) ;
  • 윤정인 (부경대학교 냉동공조공학과) ;
  • 손창효 (부경대학교 냉동공조공학과) ;
  • 최광환 (부경대학교 냉동공조공학과)
  • Received : 2017.12.28
  • Accepted : 2018.04.23
  • Published : 2018.04.30
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Abstract

PV/Thermal module is the combined system, which consist of a photovoltaic module and solar thermal collector that can obtain electrical power and thermal energy simultaneously. Thus the power generation can be increase by decreasing the temperature of photovoltaic module and thermal energy retrieved from module also can be used for heating system. In this study, Heat transfer performance of air type PV/Thermal module was confirmed with various bottom obstacles that can be installed easily to real photovoltaic module by CFD (computational fluid dynamics) analysis. Eight type obstacles were investigated according to the shape and arrangement. As a result, nusselt number represent heat transfer performance was increased about 86% compare with the basic type PV/Tthermal module that has no obstacle and triangle type obstacle had higher value than other types. But pressure drop was also increased with increment of heat transfer enhancement. Thus the performance factor considering both heat transfer and pressure drop was confirmed and V-fin type obstacle arranged in a row for Reynolds number below 9,600 and protrusion type obstacle arranged in zigzag for Reynolds number above 14,400 were shown higher performance factor than other types. From these results, V-fin type obstacle arranged in row and protrusion type obstacle arranged in zigzag were considered as a proper type for applying to real PV/thermal module according to operating condition. But the heat transfer performance can be changed by the geometric conditions of obstacle such as height, width, length and arrangement. Thus, it could also confirmed that the optimal condition and arrangement of this obstacle need to be found in further study.

Keywords

References

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