CFD Analysis of a Flat Plate Solar Collector for Improvement in Thermal Performance with Geometric Treatment of Absorber Tube

Karanth, Vasudeva K and Cornelio, Jodel A. Q. (2017) CFD Analysis of a Flat Plate Solar Collector for Improvement in Thermal Performance with Geometric Treatment of Absorber Tube. International Journal of Applied Engineering Research, 12 (14). pp. 4415-4421. ISSN 0973-4562

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Abstract

It is generally found that energy utilization in the residential and industrial applications of water heating systems is now a days developed by solar collectors. Even though there are solar water heaters with different configuration, they are constructed with absorber tubes having circular cross section. This study analyzes the implications on thermal performance when different sizes and shapes are adopted for the tubes of absorber plate. It is seen from the CFD analysis that the circular cross section tube of the collector having flattened out contact surface with that of the absorber plate provides significantly better thermal performance vis-à-vis other configurations in terms of Nusselt number. The comparison criteria adopted were constant area of cross section along flow path and constant perimeter of the tube flow path for different designs adopted in the analysis. Criterion with constant cross section area showed that the pressure drop and absolute temperature rise across the tube were relatively large for triangular tube design. For the criterion with constant perimeter interestingly, geometry with rectangular cross section provided the highest temperature rise while for the configuration with trapezium cross section, highest drop in the pressure was inferred. This study enables us to develop a prescription for design of size and shape of cross section of various absorber tubes.

Item Type: Article
Uncontrolled Keywords: Solar water heater, radiation, heat transfer, solar collector, computational fluid dynamics. Introduction (Heading 1)
Subjects: Engineering > MIT Manipal > Mechanical and Manufacturing
Depositing User: MIT Library
Date Deposited: 28 Aug 2017 04:18
Last Modified: 28 Aug 2017 04:18
URI: http://eprints.manipal.edu/id/eprint/149585

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