Pool boiling of R-123/MO and R-134a/POE lubricant mixtures on pored surfaces

2022 ◽  
Author(s):  
Yousaf Shah ◽  
Nae-Hyun Kim
Keyword(s):  
Pool Boiling ◽  
R 134A

Evaluation of the Rohsenow correlation through nucleate pool boiling data for refrigerants R-11, R-123, R-12, and R-134a

2002 ◽  
Author(s):  
J. M. Saiz Jabardo ◽  
Evandro Fockink da Silva ◽  
Gherhardt Ribatski ◽  
Samuel Freire de Barros
Keyword(s):  
Pool Boiling ◽  
Nucleate Pool Boiling ◽  
R 134A

Nucleate Pool Boiling Heat Transfer Coefficients of Distilled Water (H2O) and R-134a/Oil Mixtures From Rib-Roughened Surfaces

1997 ◽  
Vol 119 (1) ◽  
pp. 142-151 ◽  
Author(s):  
Shou-Shing Hsieh ◽  
Chun-Jen Weng
Keyword(s):  
Heat Transfer ◽  
Boiling Heat Transfer ◽  
Pool Boiling ◽  
Distilled Water ◽  
Transfer Coefficients ◽  
Pool Boiling Heat Transfer ◽  
Heat Transfer Coefficients ◽  
Oil Mixtures ◽  
R 134A ◽  
Rib Roughened

Measurements of pool-boiling heat transfer coefficients in distilled water and R-134a/oil mixtures with up to 10 percent (by weight) miscible EMKARATE RL refrigeration lubricant oil are extensively studied for a smooth tube and four rib-roughened tubes (rib pitch 39.4 mm, rib height 4 mm, rib width 15 mm, number of rib element 8, rib angle 30 deg–90 deg). Boiling data of pure refrigerants and oil mixtures, as well as the influences of heat flux level on heat transfer coefficient, are presented and discussed. A correlation is developed for predicting the heat transfer coefficient for both pure refrigerants and refrigerant-oil mixtures. Moreover, boiling visualizations were made to broaden our fundamental understanding of the pool boiling heat transfer mechanism for rib roughened surfaces with pure refrigerants and refrigerant-oil mixtures.

Pool boiling heat transfer on a plain tube in saturated R-134a and R-410A

2019 ◽  
Vol 56 (4) ◽  
pp. 1179-1188 ◽  
Author(s):  
Ashok K. Dewangan ◽  
Sanjeev K. Sajjan ◽  
Anil Kumar ◽  
Ravi Kumar
Keyword(s):  
Heat Transfer ◽  
Boiling Heat Transfer ◽  
Pool Boiling ◽  
Pool Boiling Heat Transfer ◽  
Plain Tube ◽  
R 134A

Nucleate pool boiling characteristics from coated tube bundles in saturated R-134a

2003 ◽  
Vol 46 (7) ◽  
pp. 1223-1239 ◽  
Author(s):  
Shou-Shing Hsieh ◽  
Guo-Zhen Huang ◽  
Huang-Hsiu Tsai
Keyword(s):  
Pool Boiling ◽  
Nucleate Pool Boiling ◽  
Tube Bundles ◽  
R 134A
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