Journal of the Korean Solar Energy Society (한국태양에너지학회 논문집)

The Korean Solar Energy Society (한국태양에너지학회)
권호 표지
DOI QR코드

DOI QR Code

A Numerical Study on the Thermal Performance of a Solar Air Heater Depending on the Hole Configuration and Geometry in the Absorber Plate

태양열 공기가열기의 흡열판 홀 배치와 형상에 따른 열적 성능에 관한 수치해석적 연구

  • Shin, Jae Hyuk (Defense Agency for Technology and Quality) ;
  • Boo, Joon Hong (School of Aerospace and Mechanical Engineering, Korea Aerospace University)
  • 신재혁 (국방기술품질원) ;
  • 부준홍 (한국항공대학교 항공우주 및 기계 공학부)
  • Received : 2015.01.09
  • Accepted : 2015.02.13
  • Published : 2015.02.28
Download PDF
⟨ Previous Next ⟩

Abstract

A series of numerical analyses was conducted to predict the thermal performance of a solar air heater depending on the hole configuration and geometry in the absorber plate. The planar dimensions of the prototype were 1 m (W) by 1.6 m (H), and the maximum air flow considered was $187m^3/h$. It was considered that protruding holes with a triangular opening in the absorber plate would invoke turbulence in the air flow to enhance the convection heat transfer. Six different hole configurations were investigated and compared with each other, while the hole opening height was considered as a design variable. Three-dimensional transient analyses were performed with a commercial software package on the airflow and heat transfer in the model. The numerical results were analyzed and compared from the view point of the outlet air temperature and its time response to derive the optimal hole pattern and hole opening height.

Keywords

Acknowledgement

Supported by : 한국에너지기술평가원(KETEP)

References

  1. Kumar, S. and Saini, R.P., CFD based performance analysis of a solar air heater duct provided with artificial roughness, Renewable Energy, Vol.34, pp. 1285-1291, 2009. https://doi.org/10.1016/j.renene.2008.09.015
  2. Yadav, A.S. and Bhagoria, J.L., A CFD based thermo-hydraulic performance analysis of an artificially roughened solar air heater having equilateral triangular sectioned rib roughness on the absorber plate, Int. J. of Heat and Mass Transfer, Vol.70, pp. 1016-1039, 2014. https://doi.org/10.1016/j.ijheatmasstransfer.2013.11.074
  3. Karmare, S.V. and Tikekar, A.N., Analysis of fluid flow and heat transfer in a rib grit roughened surface solar air heater using CFD, Solar Energy, Vol. 84, pp. 409-417, 2010. https://doi.org/10.1016/j.solener.2009.12.011
  4. Karwa, R. and Chitoshiya, G., Performance study of solar air heater having V-down discrete ribs on absorber plate, Energy, Vol. 55, pp. 939-955, 2013. https://doi.org/10.1016/j.energy.2013.03.068
  5. Wu, J.M. and Tao, W.Q., Effect of longitudinal vortex generator on heat transfer in rectangular channels, Applied Thermal Engineering, Vol.37, pp. 67-72, 2012. https://doi.org/10.1016/j.applthermaleng.2012.01.002
  6. Skullong, S. and Promvonge, P., Experimental investigation on turbulent convection in solar air heater channel fitted with delta winglet vortex generator, Chinese J. of Chemical Engineering, Vol.22, No.1, pp. 1-10, 2014. https://doi.org/10.1016/S1004-9541(14)60030-6
  7. Sun, W., Ji, J. and He, W., Influence of channel depth on the performance of solar air heaters, Energy, Vol.35, pp. 4201-4207, 2010. https://doi.org/10.1016/j.energy.2010.07.006
  8. Hu, J., Sun, X., Xu, J. and Li, Z., Numerical analysis of mechanical ventilation solar air collector with internal baffles, Energy and Buildings, Vol.62, pp. 230-238, 2013. https://doi.org/10.1016/j.enbuild.2013.03.015
  9. Ho, C.D., Chang, H., Wang, R.C. and Lin, C.S., Performance improvement of a double-pass solar air heater with fins and baffles under recycling operation, Applied Energy, Vol. 100, pp. 155-163, 2012. https://doi.org/10.1016/j.apenergy.2012.03.065
  10. Yang, M., Yang, X., Li, X., Wang, Z. and Wang, P., Design and optimization of a solar air heater with offset strip fin absorber plate, Applied Energy, Vol. 113, 1349-1362, 2014. https://doi.org/10.1016/j.apenergy.2013.08.091
  11. Fluent Inc., 1998, FLUENT 5 User's Guide, Vo1.2, pp.9-18-9-20.

Cited by

  1. Effects on the Characteristics of Exhaust Gas Emission and Combustion by Changing Injection Fuel Temperature vol.22, pp.5, 2018, https://doi.org/10.9726/kspse.2018.22.5.076
  2. 이중투과체 및 VIP복합 단열재 적용 평판 집열기의 성능 향상에 대한 연구 vol.28, pp.11, 2016, https://doi.org/10.6110/kjacr.2016.28.11.458
  3. CFD를 활용한 태양열 공기가열기 내 사각저항체 설치 조건에 따른 열전달 및 압력강하에 관한 연구 vol.39, pp.1, 2015, https://doi.org/10.7836/kses.2019.39.1.077
  4. A Study on the Characteristics of Combustion by Temperature Changing of Suction Air in Diesel Engine vol.23, pp.3, 2015, https://doi.org/10.9726/kspse.2019.23.3.036