Experimental Investigation on the Permanent Dryout Heat Flux and Dryout Mass Transfer Coefficient on Single Horizontal Brass Tube of an Evaporative Heat Exchanger
Journal Title: International Journal for Research in Applied Science and Engineering Technology (IJRASET) - Year 2014, Vol 2, Issue 9
Abstract
An investigation on the permanent dryout heat flux and permanent dryout mass transfer coefficient on single horizontal brass tube of an evaporative heat exchanger is presented in this article. The permanent dry patch experiments were performed over the range of Reynolds number of water from 205 to 1015 when the tube is subjected to first type of flow condition i.e. water only; within the range of Reynolds number of water (Rew) from 205 to 1010 and Reynolds number of air (Rea) from 2475 to 8150 when the tube is subjected to second type of flow condition i.e. simultaneous flow of water and air. It is observed that the percent increase in dryout heat flux ratio with Reynolds number of water (Rew) is found as 59.5 % when the tube is subjected to water only; The percent increase in dry out heat flux ratio with Reynolds number of water (Rew) is found as 53.7 % when the tube is subjected to simultaneous flow of water and air. The permanent dryout mass transfer coefficient ratio first increases with Reynolds number of water (Rew) and then decreases. Correlations are developed by using multiple regression analysis of experimental data. The correlations presented may prove to be useful in the improvement of design of an evaporative heat exchanger.
Authors and Affiliations
Annu, Raj Kumar
Keywords
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