Flow Visualization, Critical Heat Flux Enhancement, and Transient Characteristics in Pool Boiling Using Nanofluids

2012 ◽  
Vol 9 (5) ◽  
pp. 104443 ◽  
Author(s):  
Ramakrishna N. Hegde ◽  
Shrikantha S. Rao ◽  
R. P. Reddy
Keyword(s):  
Heat Flux ◽  
Flow Visualization ◽  
Critical Heat Flux ◽  
Pool Boiling ◽  
Transient Characteristics ◽  
Flux Enhancement

Boiling Heat Transfer and Critical Heat Flux Enhancement of Upward- and Downward-Facing Heater in Nanofluids

2013 ◽  
Vol 135 (7) ◽  
Author(s):  
Muhamad Zuhairi Sulaiman ◽  
Masahiro Takamura ◽  
Kazuki Nakahashi ◽  
Tomio Okawa
Keyword(s):  
Heat Transfer ◽  
Heat Flux ◽  
Critical Heat Flux ◽  
Boiling Heat Transfer ◽  
Pool Boiling ◽  
Nucleate Boiling ◽  
Flux Enhancement ◽  
Optimum Configuration ◽  
Wall Superheat ◽  
Nucleate Boiling Heat Transfer

Boiling heat transfer (BHT) and critical heat flux (CHF) performance were experimentally studied for saturated pool boiling of water-based nanofluids. In present experimental works, copper heaters of 20 mm diameter with titanium-oxide (TiO2) nanocoated surface were produced in pool boiling of nanofluid. Experiments were performed in both upward and downward facing nanofluid coated heater surface. TiO2 nanoparticle was used with concentration ranging from 0.004 until 0.4 kg/m3 and boiling time of tb = 1, 3, 10, 20, 40, and 60 mins. Distilled water was used to observed BHT and CHF performance of different nanofluids boiling time and concentration configurations. Nucleate boiling heat transfer observed to deteriorate in upward facing heater, however; in contrast effect of enhancement for downward. Maximum enhancements of CHF for upward- and downward-facing heater are 2.1 and 1.9 times, respectively. Reduction of mean contact angle demonstrate enhancement on the critical heat flux for both upward-facing and downward-facing heater configuration. However, nucleate boiling heat transfer shows inconsistency in similar concentration with sequence of boiling time. For both downward- and upward-facing nanocoated heater's BHT and CHF, the optimum configuration denotes by C = 400 kg/m3 with tb = 1 min which shows the best increment of boiling curve trend with lowest wall superheat ΔT = 25 K and critical heat flux enhancement of 2.02 times.

Experimental study on pool boiling and Critical Heat Flux enhancement of metal oxides based nanofluid

2018 ◽  
Vol 96 ◽  
pp. 37-42 ◽  
Author(s):  
Nishant Kumar ◽  
Nandkishor Urkude ◽  
Shriram S. Sonawane ◽  
Shirish H. Sonawane
Keyword(s):  
Experimental Study ◽  
Heat Flux ◽  
Metal Oxides ◽  
Critical Heat Flux ◽  
Pool Boiling ◽  
Flux Enhancement

scholarly journals Critical heat flux enhancement in pool boiling through increased rewetting on nanopillar array surfaces

2018 ◽  
Vol 8 (1) ◽  
Author(s):  
Thien-Binh Nguyen ◽  
Dongdong Liu ◽  
Md Imrul Kayes ◽  
Baomin Wang ◽  
Nabeel Rashin ◽  
...  
Keyword(s):  
Heat Flux ◽  
Critical Heat Flux ◽  
Pool Boiling ◽  
Flux Enhancement

Pool Boiling Critical Heat Flux Enhancement Using Three-Dimensional Porous Structures

2018 ◽  
Vol 2018 (0) ◽  
pp. 0192
Author(s):  
Tomotaka Ueki ◽  
Kyoshiro Kawano ◽  
Tomohide Yabuki ◽  
Koji Miyazaki ◽  
Massoud Kaviany
Keyword(s):  
Heat Flux ◽  
Critical Heat Flux ◽  
Pool Boiling ◽  
Three Dimensional ◽  
Porous Structures ◽  
Flux Enhancement

Critical heat flux enhancement in pool boiling using alumina nanofluids

2010 ◽  
pp. n/a-n/a ◽  
Author(s):  
Ramakrishna Hegde ◽  
Srikanth S. Rao ◽  
R.P. Reddy
Keyword(s):  
Heat Flux ◽  
Critical Heat Flux ◽  
Pool Boiling ◽  
Flux Enhancement
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