Study on heat transfer characteristics of ethane pulsating heat pipe in middle-low temperature region

Experimental research was conducted to understand heat transfer characteristics of pulsating heat pipe in this paper. The PHP is made of high quality glass capillary tube. The heat transfer rate and many other influence factors, the flow patterns were observed in the start-up, transition and stable stage under different fill ratio. The effects of heating position on heat transfer were discussed. The experimental results indicate that no annular flow appeares in top heating condition. 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 for down heating case under different fill ratios and heat transfer rate. The experimental results show that the total heat resistant of PHP is increased with fill ratio, and heat transfer rate achieves optimum at filling rate 50%. But for pulsating heat pipe with changing diameters the thermal resistance is higher than that with uniform diameters.

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Experimental study on synergistic coupling between pulsating heat pipe to enhance heat transfer characteristics

10.1109/cieec50170.2021.9510495 ◽

2021 ◽

Author(s):

Fumin Shang ◽

Chaoyue Liu ◽

Kangzhe Yang ◽

Qingjing Yang ◽

Jianhong Liu

Keyword(s):

Heat Transfer ◽

Experimental Study ◽

Heat Pipe ◽

Pulsating Heat Pipe ◽

Heat Transfer Characteristics ◽

Enhance Heat Transfer ◽

Transfer Characteristics

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Effect of Filling Ratio on Heat Transfer Characteristics and Performance of a Closed Loop Pulsating Heat Pipe

Procedia Engineering ◽

10.1016/j.proeng.2013.03.093 ◽

2013 ◽

Vol 56 ◽

pp. 88-95 ◽

Cited By ~ 24

Author(s):

Himel Barua ◽

Mohammad Ali ◽

Md. Nuruzzaman ◽

M. Quamrul Islam ◽

Chowdhury M. Feroz

Keyword(s):

Heat Transfer ◽

Heat Pipe ◽

Closed Loop ◽

Filling Ratio ◽

Pulsating Heat Pipe ◽

Heat Transfer Characteristics ◽

Transfer Characteristics ◽

And Performance

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Heat Transfer Characteristics of Aluminum Plate Pulsating Heat Pipes

ASME 2011 Pacific Rim Technical Conference and Exhibition on Packaging and Integration of Electronic and Photonic Systems, MEMS and NEMS: Volume 2 ◽

10.1115/ipack2011-52018 ◽

2011 ◽

Cited By ~ 1

Author(s):

Z. R. Lin ◽

Z. Y. Lee ◽

L. W. Zhang ◽

S. F. Wang ◽

A. A. Merrikh ◽

...

Keyword(s):

Heat Transfer ◽

Flow Visualization ◽

Heat Pipe ◽

Thermal Performance ◽

Aluminum Plate ◽

Channel Cross Section ◽

Working Fluid ◽

Pulsating Heat Pipe ◽

Heat Transfer Characteristics ◽

Transfer Characteristics

Heat transfer characteristics of an aluminum plate pulsating heat pipe (PHPs) were investigated experimentally. Sizes, consisting of parallel and square channels as well as different cross-sections and different number of turns were considered. Acetone was used as working fluid. The characterization had been done for various heating mode orientations, cooling conditions, and internal structures via flow visualization and thermal performance tests. The flow visualization showed that the aluminum plate PHPs can maintain the heat transfer characteristics of the liquid and the vapor slug as well as the conventional tubular PHPs. The trend of flow pattern changed from the intermittent oscillation to unidirectional circulation. It was also observed that the PHPs’ thermal performance improved as heating power increased. The gravity greatly influenced the thermal performance of plate PHPs. Increasing the cooling temperature decreased the thermal resistance of the plate PHPs. Increasing the number of turns and the area of channel cross-section improved the heat transport capability of plate PHPs for some specific scenarios. A heat sink with a plate PHP was developed for comparing with the pure metal and conventional heat pipe solutions. The result showed that the plate PHPs solution performed well, and had the potential to replace previous solutions in some cases.

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