THERMAL SCIENCE

International Scientific Journal

Raja Balakrishnan

,

Joseph Sekhar Santhappan

,

Mohan Lal Dhasan

HEAT TRANSFER CORRELATION FOR A REFRIGERANT MIXTURE IN A VERTICAL HELICAL COIL EVAPORATOR

ABSTRACT
The flow boiling heat transfer study of R-134a/R-290/R-600a refrigerant mixture is carried out in a vertical helical evaporator test section. The test section is immersed in an agitated ethylene glycol-water bath maintained at constant temperature. An aluminum test section with a height of 0.22 m, tube inside diameter of 6.35 mm, outside diameter of 8 mm and coil length of 8 m is used. The influences of various operating parameters such as evaporating temperature, bath temperature, and refrigerant composition on the heat transfer coefficient are investigated experimentally. Using the same experimental results the shell side flow boiling heat transfer coefficient correlation in helical evaporator is also evolved.
KEYWORDS
flow boiling, helical coil, heat transfer coefficient, R-134a, M09
PAPER SUBMITTED: 2008-11-16
PAPER REVISED: 2009-04-21
PAPER ACCEPTED: 2009-04-21
DOI REFERENCE: https://doi.org/10.2298/TSCI0904197R
CITATION EXPORT: view in browser or download as text file
THERMAL SCIENCE YEAR 2009, VOLUME 13, ISSUE Issue 4, PAGES [197 - 206]
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Heat transfer correlation for a refrigerant mixture in a vertical helical coil evaporator

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