An Experimental Analysis of the effect of Different Inlet Condition of air by using Forced Convection Heat Transfer
Author(s):
Mr. A.V. Chauhan, Prof. A.R. Mankar
Keywords:
baffle height, convective heat transfer coefficient, inlet angle, heat transfer enhancement, Nusselt No., Rectangular channel, Reynolds number, Turbulent, uniform heat flux.
Abstract
This paper is based on the experimental analysis of the effect of various types of inlet condition of air (0,45,90) and different height of baffle arrangement. The utilization of baffles in channel is usually used for passive heat transfer enhancement Techniques in single phase internal flow. Heat transfer enhancement technology is that the technique of rising the performance of a heat transfer by increasing the convective heat transfer coefficient. Heat transfer techniques for enhancing is divided in two classes. First is Passive Methodology like rough surfaces, extended surfaces, baffles, twisted tapes, whorled screw tape inserts, additives for liquid and gases. Another is Active methodology, which needs additional external power, for instance mechanical aids, surface fluid vibration, use of electricity fields. Active heat transfer strategies have been found more expensive as compared to Passive strategies. In most of the earlier numerical and experimental studies empirical correlations for duct flow with straight channel has been investigated and corresponding heat transfer and pressure drop are reported, only a few projects are presented for channel with turned flow therefore an experimental study is required to be carried during a rectangular channel with turned flow (45,60, 90) varying the Reynolds number which indicates turbulence flow. The Reynold number is in range of 15000 to 37000 which indicates turbulence flow. The Rectangular channel has been heated from bottom with a constant heat flux (V x I) through the dimmer. A Independent heater arrangement has been made at the entrance to vary the inlet temperature. Also the inlet temperature is varied and air is supplied at four different temperatures i.e. 30 ,35, 40C, and 45C in order to study the effect of temperature on heat transfer. Typically, the main motto of this analysis is to cut back the dimensions and prices of heat exchanger. Considering the faster rise in energy demand, most effective heat transfer enhancement techniques became important task for the globe. Experimental and empirical correlations for duct flow are given for hydro dynamically and thermally developed flow in most of previous studies. How-ever the effect of baffle hei
Article Details
Unique Paper ID: 150246

Publication Volume & Issue: Volume 7, Issue 4

Page(s): 190 - 194
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