Research Papers

Design Considerations of Unglazed Transpired Collectors: Energetic and Exergetic Studies

[+] Author and Article Information
M. Gholampour

Department of Mechanical Engineering,
Faculty of Engineering,
Shahid Bahonar University,
Kerman, Iran
Energy and Environmental Engineering
Research Center,
Shahid Bahonar University,
Kerman, Iran

M. Ameri

Department of Mechanical Engineering,
Faculty of Engineering,
Shahid Bahonar University,
Kerman, Iran
Energy and Environmental Engineering
Research Center,
Shahid Bahonar University,
Kerman, Iran
e-mail: ameri_mm@mail.uk.ac.ir

1Corresponding author.

Contributed by the Solar Energy Division of ASME for publication in the JOURNAL OF SOLAR ENERGY ENGINEERING. Manuscript received August 6, 2013; final manuscript received November 29, 2013; published online January 10, 2014. Editor: Gilles Flamant.

J. Sol. Energy Eng 136(3), 031004 (Jan 10, 2014) (10 pages) Paper No: SOL-13-1219; doi: 10.1115/1.4026251 History: Received August 06, 2013; Revised November 29, 2013

Unglazed transpired collector (UTC) is a kind of solar air heater is used for different applications such as air ventilation, preheating, and crop drying. Passing air through the perforated plate, which acts as an absorber, is the main mechanism of heat transfer and air preheating in UTCs. In order to design UTCs and determine the effective parameters, energy and exergy analyses are performed. A mathematical model which is solved using an iterative method by a computer code has been developed. In order to validate the present model, this solution is compared with numerical and experimental results available in the literature, where a good agreement is obtained. After verifying the model, the code has been used to study the influence of the effective parameters on the performance of the system. The results show that the exergetic analysis is very important to design.

Copyright © 2014 by ASME
Your Session has timed out. Please sign back in to continue.


Kutscher, C. F., Christensen, C. B., and Barker, G. M., 1993, “Unglazed Transpired Solar Collectors: Heat Loss Theory,” ASME J. Sol. Energy Eng., 115(3), pp. 182–188. [CrossRef]
Hollick, J. C., 1994, “Unglazed Solar Wall Air Heaters,” Renewable Energy, 5(1–4), pp. 415–421. [CrossRef]
Kutscher, C. F., 1994, “Heat Exchange Effectiveness and Pressure Drop for Air Flow Through Perforated Plates With and Without Crosswind,” ASME J. Heat Transfer, 116(2), pp. 391–399. [CrossRef]
Summers, D. N., 1995, “Thermal Simulation and Economic Assessment of Unglazed Transpired Collector Systems,” Master thesis, University of Wisconsin, Madison, WI.
Gunnewiek, L. H., Brundrett, E., and Hollands, K. G. T., 1996, “Flow Distribution in Unglazed Transpired Plate Solar Air Heaters of Large Area,” Sol. Energy, 58(4–6), pp. 227–237. [CrossRef]
Dymond, C., and Kutscher, C., 1997, “Development of a Flow Distribution and Design Model for Transpired Solar Collectors,” Sol. Energy, 60(5), pp. 291–300. [CrossRef]
Van Decker, G. W. E., Hollands, K. G. T., and Brunger, A. P., 2001, “Heat-Exchange Relations for Unglazed Transpired Solar Collectors With Circular Holes on a Square or Triangular Pitch,” Sol. Energy, 71(1), pp. 33–45. [CrossRef]
Gawlik, K., and Kutscher, C., 2002, “Wind Heat Loss From Corrugated, Transpired Solar Collectors,” ASME J. Sol. Energy Eng., 124, pp. 256–261. [CrossRef]
Gawlik, K., Christensen, C., and Kutscher, C., 2005, “A Numerical and Experimental Investigation of Low-Conductivity Unglazed, Transpired Solar Air Heaters,” ASME J. Sol. Energy Eng., 127(1), pp. 153–155. [CrossRef]
Leon, M. A., and Kumar, S., 2007, “Mathematical Modeling and Thermal Performance Analysis of Unglazed Transpired Solar Collectors,” Sol. Energy, 81(1), pp. 62–75. [CrossRef]
Greig, D., Siddiqui, K., and Karava, P., 2012, “An Experimental Investigation of The Flow Structure Over a Corrugated Waveform in a Transpired Air Collector,” Int. J. Heat Fluid Flow, 38, pp. 133–144. [CrossRef]
Badache, M., Rousse, D. R., Hallé, S., and Quesada, G., 2013, “Experimental and Numerical Simulation of a Two-Dimensional Unglazed Transpired Solar Air Collector,” Sol. Energy, 93, pp. 209–219. [CrossRef]
Incropera, F. P., and De Witt, D. P., 1985, Fundamentals of Heat and Mass Transfer, John Wiley & Sons, New York.
Petela, R., 1964, “Exergy of Heat Radiation,” ASME J. Heat Transfer, 86(2), pp. 187–192. [CrossRef]
Duffie, J. A., and Beckman, W. A., 1991, Solar Engineering of Thermal Processes, John Wiley & Sons, New York.
Walton, G. N., 1983, Thermal Analysis Research Program Reference Manual, National Bureau of Standards, Washington, DC.
McAdams, W. H., 1954, Heat Transmission, McGraw-Hill, New York.


Grahic Jump Location
Fig. 2

Energy-flow diagram of entire system

Grahic Jump Location
Fig. 1

Unglazed transpired collector mounted on the wall

Grahic Jump Location
Fig. 3

Air temperature rise versus solar radiation at different suction velocities

Grahic Jump Location
Fig. 4

(Fan power, η, ηII) versus hole diameter at different suction velocity and hole pitch

Grahic Jump Location
Fig. 7

η and ηII versus plenum depth at different suction velocity and solar radiation

Grahic Jump Location
Fig. 8

η and ηII versus amplitude corrugation at different suction velocity and wavelength corrugation

Grahic Jump Location
Fig. 9

η and ηII versus wind velocity at different suction velocity and plate

Grahic Jump Location
Fig. 5

(Fan power, η, ηII) versus hole pitch at different suction velocity and hole diameter

Grahic Jump Location
Fig. 6

(Fan power, η, ηII) versus suction velocity at different hole pitch and hole diameter




Some tools below are only available to our subscribers or users with an online account.

Related Content

Customize your page view by dragging and repositioning the boxes below.

Related Journal Articles
Related eBook Content
Topic Collections

Sorry! You do not have access to this content. For assistance or to subscribe, please contact us:

  • TELEPHONE: 1-800-843-2763 (Toll-free in the USA)
  • EMAIL: asmedigitalcollection@asme.org
Sign In