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Title: Boiling Heat Transfer From Shot Peened Aluminium Surface to Glycol Solution
Author: M C Sharma, Anupam Hara
Source: Conf Proc: ICSP-7 (pg 337-343)
Publication year 1999
Document number: 1999046
Number of pages: 7
Abstract:
Boiling heat transfer is largely affected by the surface condition of the work piece and its surrounding boiling media (coolant). In the present investigation coolant used
was same as commonly used in car engines that is 95% ethylene glycol with some inhibitor to prevent corrosion. It was used as mixture of water and glycol in 3:1 ratio.
Work piece was of Aluminium. The optimum surface roughness obtained by shot peening was 6.27 wm which gave maximum heat transfer coefficient of 17 kw/M²°c at 200V heat
input. The percentage improvement in boiling heat transfer compared to original surface was found to be 90% at this optimum roughness. While the percentage improvement
with only water as cooling media was still higher and was 148% but at 95kw/M²°c heat transfer coefficient. Therefore with Glycol solution higher heat transfer coefficient
was obtained compared to water, though percentage improvement was lower.
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