태양열 공기가열기의 흡열판 홀 배치와 형상에 따른 열적 성능에 관한 수치해석적 연구
A Numerical Study on the Thermal Performance of a Solar Air Heater Depending on the Hole Configuration and Geometry in the Absorber Plate
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초록
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 187 m3/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.
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 187 m3/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.
참고문헌 (11)
- Kumar, S., "CFD based performance analysis of a solar air heater duct provided with artificial roughness", Renewable Energy, 34, pp.1285~1291 (2009)
- Yadav, A.S., "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, 70, pp.1016~1039 (2014)
- Karmare, S.V., "Analysis of fluid flow and heat transfer in a rib grit roughened surface solar air heater using CFD", Solar Energy, 84, pp.409~417 (2010)
- Karwa, R, "Performance study of solar air heater having V-down discrete ribs on absorber plate", Energy, 55, pp.939~955 (2013)
- Wu, J.M., "Effect of longitudinal vortex generator on heat transfer in rectangular channels", Applied Thermal Engineering, 37, pp.67~72 (2012)
- Skullong, S., "Experimental investigation on turbulent convection in solar air heater channel fitted with delta winglet vortex generator", Chinese J. of Chemical Engineering, 22(1), pp.1~10 (2014)
- Sun, W., "Influence of channel depth on the performance of solar air heaters", Energy, 35, pp.4201~4207 (2010)
- Hu, J., "Numerical analysis of mechanical ventilation solar air collector with internal baffles", Energy and Buildings, 62, pp.230~238 (2013)
- Ho, C. D., "Performance improvement of a double-pass solar air heater with fins and baffles under recycling operation", Applied Energy, 100, pp.155~163 (2012)
- Yang, M., "Design and optimization of a solar air heater with offset strip fin absorber plate", Applied Energy, 113, pp.1349~1362 (2014)
- Fluent Inc., "FLUENT 5 User's Guide, Vo1.2", 9-18~9-20 (1998)