Experimental study of effects of wicks and boundary conditions on thermal performance of heat pipes

2022 ◽  
Author(s):  
Foster Kwame Kholi ◽  
Hariharan Kallath ◽  
Alberto Mucci ◽  
Man Yeong Ha ◽  
Jason Chetwynd-Chatwin ◽  
...  
Keyword(s):  
Experimental Study ◽  
Boundary Conditions ◽  
Thermal Performance ◽  
Heat Pipes

Experimental study on two-phase flow and thermal performance in pulsating heat pipes

2020 ◽  
pp. 1-11
Author(s):  
Suchen Wu ◽  
Hua Zhou ◽  
Feng Yao ◽  
Zilong Deng ◽  
Yan Zhang ◽  
...  
Keyword(s):  
Experimental Study ◽  
Thermal Performance ◽  
Two Phase Flow ◽  
Heat Pipes ◽  
Phase Flow ◽  
Two Phase

scholarly journals Experimental study on the performance limitation of micro heat pipes of non circular cross-sections

2008 ◽  
Vol 12 (3) ◽  
pp. 91-102 ◽  
Author(s):  
Lutful Mahmood ◽  
Razzaq Akhanda
Keyword(s):  
Heat Transfer ◽  
Experimental Study ◽  
Thermal Performance ◽  
Cross Sections ◽  
Heat Pipes ◽  
Working Fluid ◽  
Electric Heater ◽  
Condenser Section ◽  
Inclination Angles ◽  
Micro Heat Pipes

An experimental study of three different cross-sections (circular, semicircular and rectangular) of micro heat pipes having same hydraulic diameter (D= 3mm) is carried out at three different inclination angles (0?, 45?, 90?) using water as the working fluid. Evaporator section of the pipe is heated by an electric heater and the condenser section is cooled by water circulation in an annular space between the condenser section and the water jacket. Temperatures at different locations of the pipe are measured using five calibrated K type thermocouples. Heat supply is varied using a voltage regulator which is measured by a precision ammeter and a voltmeter. It is found that thermal performance tends to deteriorate as the micro heat pipe is flattened. Thus among all cross-sections of the pipes circular cross-section exhibits the best thermal performance followed by semicircular and rectangular cross-sections. Moreover maximum heat transfer capability of the pipes also decreases with decreasing of its inclination angle. A correlation is developed using all the gathered data of the present study to predict the heat transfer coefficient of micro heat pipes of different cross-sections placed at different inclination angles.

Experimental study on effect of wick structures on thermal performance enhancement of cylindrical heat pipes

2018 ◽  
Vol 136 (1) ◽  
pp. 389-400 ◽  
Author(s):  
G. Kumaresan ◽  
P. Vijayakumar ◽  
M. Ravikumar ◽  
R. Kamatchi ◽  
P. Selvakumar
Keyword(s):  
Experimental Study ◽  
Thermal Performance ◽  
Performance Enhancement ◽  
Heat Pipes

Experimental study of thermohydraulic characteristics and irreversibility analysis of novel axial corrugated tube with spring tape inserts

2020 ◽  
Vol 92 (3) ◽  
pp. 30901
Author(s):  
Suvanjan Bhattacharyya ◽  
Debraj Sarkar ◽  
Ulavathi Shettar Mahabaleshwar ◽  
Manoj K. Soni ◽  
M. Mohanraj
Keyword(s):  
Heat Transfer ◽  
Experimental Study ◽  
Thermal Performance ◽  
Working Fluid ◽  
The Novel ◽  
Heat Exchanger Tube ◽  
Heat Transfer Augmentation ◽  
Corrugated Tube ◽  
The Impact ◽  
Exchanger Tube

The current study experimentally investigates the heat transfer augmentation on the novel axial corrugated heat exchanger tube in which the spring tape is introduced. Air (Pr = 0.707) is used as a working fluid. In order to augment the thermohydraulic performance, a corrugated tube with inserts is offered. The experimental study is further extended by varying the important parameters like spring ratio (y = 1.5, 2.0, 2.5) and Reynolds number (Re = 10 000–52 000). The angular pitch between the two neighboring corrugations and the angle of the corrugation is kept constant through the experiments at β = 1200 and α = 600 respectively, while two different corrugations heights (h) are analyzed. While increasing the corrugation height and decreasing the spring ratio, the impact of the swirling effect improves the thermal performance of the system. The maximum thermal performance is obtained when the corrugation height is h = 0.2 and spring ratio y = 1.5. Eventually, correlations for predicting friction factor (f) and Nusselt number (Nu) are developed.

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