TY - JOUR
TI - Heat transfer correlation for a refrigerant mixture in a vertical helical coil evaporator
AU - Balakrishnan Raja
AU - Santhappan Joseph Sekhar
AU - Dhasan Mohan Lal
JN - Thermal Science
PY - 2009
VL - 13
IS - 4
SP - 197
EP - 206
PT - Article
AB - 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.