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Jitraporn Wongsa-Ngam. Average Heat Transfer Coefficient and Pressure Drop for an Alternative Refrigerant in Smooth and Micro-Fin Tubes. Master's Degree(Energy Technology). King Mongkut's University Technology Thonburi. : King Mongkut's University of Technology Thonburi, 2000.
Average Heat Transfer Coefficient and Pressure Drop for an Alternative Refrigerant in Smooth and Micro-Fin Tubes
Name: Jitraporn Wongsa-Ngam
Organization :
King Mongkut's University of Technology Thonburi. The Joint Graduate School of Energy and Environmental. Energy Technology
keyword:
Evaporation
Abstract:
The average heat transfer coefficient and pressure drop of R-134a duringevaporation in smooth and micro-fin tubes are reported. A horizontal smooth coppertube with an outside diameter of 9.52 mm, and micro-fin tubes with outside diametersof 8.00 and 9.52 mrn are employed. The data are taken at three different temperatures(5 C, 10 C and 15 C). The range of mass flux is between 440 kg/rn2s and 860kg/m2s and the heat flux is between 10 kW/m2 and 46 kW/m2.The experimental results for both smooth and micro-fin tubes show thai theaverage heat tl-ansfer coefficient tends to increase with an increase of average quality,mass flux, heat flux, and evaporating temperature. For smoolh and micro-fin tubes,the pressure drop during evaporation increases with an increase of average quality andinass flux, but tends to slightly decrease with a rise of evaporating temperature. Theaverage heat transfer coefficient of the 9.52 mm OD micro-fin tube is 40% to 100%higher than that of the 9.52 mm OD smooth tube while the pressure drop is 15% to50% higher. In addition, the results show that the heat transfer coeflicient of the 9.52mm micro-fin tube is approximately 10% to 40 % higher than that of the 8.00 rnmmicro-fin tube. The pressure drop in the 8.00 mm micro-fin tube is approximately50% higher than in the 9.52 mm micro-fin tube.
King Mongkut's University Technology Thonburi
Address:
กรุงเทพมหานคร (Bangkok)
Email:
info.lib@mail.kmutt.ac.th
Name: Somchai Wongwises
Role:
Advisor
Created:
2000
Issued:
2008-01-17
Modified:
2009-01-28
วิทยานิพนธ์/Thesis
CallNumber:
JGSEE5
eng
DegreeName: Master of Philosophy
Level: Master's Degree
Descipline: Energy Technology
©copyrights King Mongkut's University of Technology Thonburi
RightsAccess:
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0.03543 วินาที
Jitraporn Wongsa-Ngam
| Title | Contributor | Type |
|---|---|---|
| Average Heat Transfer Coefficient and Pressure Drop for an Alternative Refrigerant in Smooth and Micro-Fin Tubes
มหาวิทยาลัยเทคโนโลยีพระจอมเกล้าธนบุรี Jitraporn Wongsa-Ngam | Somchai Wongwises | วิทยานิพนธ์/Thesis |
Somchai Wongwises