Effect of design parameters on thermal efficiency of a flat plate solar collector

Document Type : Review Article

Authors

Mechanical Engineering Department, Technical Faculty, South Tehran Branch, Islamic Azad University

Abstract

It is the aim of this paper to determine the parameters affecting thermal performance of flat plate solar collectors. As a first step, theoretical models for different configurations of a flat plate collector are introduced. These include riser tubes below the absorber plate, tubes above the absorber and tube in between.
A comparison is then made between the theoretical results and real experiments which were implemented in solar energy laboratory at South Tehran Branch of Islamic Azad University.
According to the results, the maximum absorbed energy is for the case where tubes are below the absorber plate. Decreasing the distance between the riser tubes, applying low emissivity glass and increasing insulation thickness are among the parameters which increase collector thermal efficiency.
In addition, decreasing the pressure of the gas between the absorber plate and collector glazing increase collector efficiency. Insulation material and working fluid also affect the collector thermal efficiency.

Keywords

References

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History

  • Receive Date: 08 August 2017
  • Revise Date: 23 March 2018
  • Accept Date: 22 May 2018

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