Theoretical and experimental studies on boiling heat transfer for the Thermosyphons with various helical grooves

2005 ◽  
Vol 19 (8) ◽  
pp. 1662-1669 ◽  
Author(s):  
Kyuil Han ◽  
Dong-Hyun Cho

1970 ◽  
Author(s):  
Akira Sakurai ◽  
Koichi Mizukami ◽  
Masahiro Shiotsu




2012 ◽  
Vol 550-553 ◽  
pp. 3169-3172
Author(s):  
Ding Cai Zhang ◽  
Chun Jie Zhu ◽  
Xiao Ming Yang ◽  
Tao Han

Experimental studies of boiling heat transfer of R134a on single horizontal smooth tube and three enhanced tubes (E27, E28, E29) have been conducted at saturationtemperature of 5°C and at a given water flow rate of 2.5 m/s. The results ind icate that the boiling heat transfer outside a single horizontal tube to the parameters of tube is selective. Tube E28 with 1811fpm (46fpi) is optimal. Experimental results showed that the test tubes could effectively enhance heat transfer. The boiling heat transfer coefficients of tube E27, tube E28, tube E29 are with the average values of 8.41, 9.16 and 6.63 times as that of smooth tube, respectively.





2019 ◽  
Vol 138 (6) ◽  
pp. 4019-4043 ◽  
Author(s):  
Mohammed Saad Kamel ◽  
Ferenc Lezsovits ◽  
Ahmed Kadhim Hussein


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