Experimental investigation on heat transfer and flow patterns of pulsating heat pipe assisted by ultrasonic cavitation

2021 ◽  
pp. 122187
Author(s):  
Dongwei Zhang ◽  
Jian Guan ◽  
Zhuantao He ◽  
Chao Shen ◽  
Hailiang Cao
Keyword(s):  
Heat Transfer ◽  
Experimental Investigation ◽  
Heat Pipe ◽  
Flow Patterns ◽  
Ultrasonic Cavitation ◽  
Pulsating Heat Pipe

Experimental investigation of graphene oxide nanofluid on heat transfer enhancement of pulsating heat pipe

2018 ◽  
Vol 91 ◽  
pp. 90-94 ◽  
Author(s):  
Mohammad Alhuyi Nazari ◽  
Roghayeh Ghasempour ◽  
Mohammad Hossein Ahmadi ◽  
Gholamreza Heydarian ◽  
Mohammad Behshad Shafii
Keyword(s):  
Heat Transfer ◽  
Experimental Investigation ◽  
Graphene Oxide ◽  
Heat Pipe ◽  
Heat Transfer Enhancement ◽  
Pulsating Heat Pipe ◽  
Transfer Enhancement

Experimental Study on Flow Visualizing and Heat Transfer Characteristic of Pulsating Heat Pipe

2007 ◽  
Author(s):  
Li Jia ◽  
Dayan Yin
Keyword(s):  
Heat Transfer ◽  
Heat Pipe ◽  
Heat Transfer Rate ◽  
Transfer Rate ◽  
Flow Patterns ◽  
Bulk Flow ◽  
Experimental Results ◽  
Pulsating Heat Pipe ◽  
Transition Flow ◽  
Fill Ratio

The flow of looped pulsating heat pipe was studied by a visualizing experiment, and the PHP is made of high quality glass capillary tube. Under different fill ratio, heat transfer rate and many other influence factors, the flow patterns were observed in the start-up, transition and stable stage. The experimental results indicate that bulk flow, transition flow and annular flow are the major flow patterns in PHP. Under different fill ratios and heat transfer rate, the flow pattern in PHP is transferred form bulk flow to semi-annual flow and annual flow, and the performance of heat transfer is improved. In the experiment, nuclear boiling, the convergence and break up of liquid-plug and vapor-slug were observed. The influence characterization has been done for the variation of fill ration, heat transfer rate, non-condensable gas and inclination angle. The experimental results indicate that the total heat resistant of PHP is increased with fill ratio, and heat transfer rate achieves optimum at filling rate 50%; the heat resistance is decreased with heat transfer rate, and non-condensable gas also has significant influence on it. The temperature of tubes in heating, condensing and observe sections were recorded, The fluctuation of heat pipe wall temperature was analysed, and the phenomena of suddently increase or decrease of temperature, the unregular fluctuation of temperature were analyzed. Otherwise the response time under different conditions was also analyzed.

scholarly journals Experimental Investigation on Heat Transfer Characteristics of an Open Loop Pulsating Heat Pipe(OLPHP) with Fin

2015 ◽  
Vol 105 ◽  
pp. 113-120 ◽  
Author(s):  
Md Lutfor Rahman ◽  
Pijush Kanti Saha ◽  
Fariha Mir ◽  
Asfia Tanjim Totini ◽  
Sumaiya Nawrin ◽  
...  
Keyword(s):  
Heat Transfer ◽  
Experimental Investigation ◽  
Heat Pipe ◽  
Open Loop ◽  
Pulsating Heat Pipe ◽  
Heat Transfer Characteristics ◽  
Transfer Characteristics

HEAT TRANSFER STUDIES IN A CLOSED LOOP PULSATING HEAT PIPE

2014 ◽  
Vol 5 (1-4) ◽  
pp. 449-456
Author(s):  
Bhawna Verma ◽  
V. L. Yadav ◽  
K. K. Srivastava
Keyword(s):  
Heat Transfer ◽  
Heat Pipe ◽  
Closed Loop ◽  
Pulsating Heat Pipe
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