Experimental study of heat transfer coefficient in trapezoidal and rectangular shape of absorber plate in box type solar cooker

Type :

Term papers

Pages :

5 pages

Format :

.pdf

Published date :

09/18/2009

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Summary :

 
 

Table of Contents Experimental study of heat transfer coefficient in trapezoidal and rectangular shape of absorber plate in box type solar cooker Table of Contents

 
  1. Abstract
  2. Introduction
  3. Therma performance for top heat loss coefficient
    1. Experimental top heat loss coefficient
    2. Theoretical top loss coefficient
    3. Natural convective heat transferin trapezoidal enclosure of box type solar cooker
    4. Empirical equation for top loss coefficient for rectangular enclosure
  4. Experimental detail and setup
  5. Results and dicussion
  6. Conclusion
  7. Bibliography

Abstract

The box type solar cooker is the simplest device to convert solar energy into heat energy which is finally utilized to cook the food staff kept in the cooker. The box type solar cooker are constructed usually either with rectangular or trapezium absorber plate glass cover enclosure. In this paper simple thermal analysis carried out to evaluate the natural convective heat transfer coefficient hcplg for a trapezoidal absorber plate- lower glass cover enclosure of a double glazed box type solar cooker. The experimental data has been correlated by an equation in the form; Nu=C Ran the values of constant C and n , obtained by simple linear regression analysis are used to calculate the convective heat transfer coefficient for reference wind speed 1.5 to 2.5 m/s. The heat transfer analysis predicts that hcplg varies from 4.85 W/m2 0C to 6.28 W/m2 0C for the absorber plate temperature from 72.4 0C to 150 0C. These results of hcplg are compared with those of rectangular enclosure for the same absorber lower glass cover temperatures and gap spacing. It is found that the values of convective heat transfer coefficient and top heat loss coefficients for rectangular enclosure are lower by 32.5 % and 12% respectively. Keywords: box-type solar cooker; Convective heat transfer coefficient; Trapezium enclosure; Top heat loss coefficient.

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About the author :

pencil image Vijay P. Director of Shri HDG MBA College
Level :General public Study : Management School/University : Saurashtra University

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