A study on the equivalent circuit of longitudinal vibration piezoelectric transformers with contacted heat transfer device

2016 ◽  
Author(s):  
Pei-yang Li ◽  
Zhi-le Han ◽  
Wei-wei Shao ◽  
Jie Xu ◽  
Tian-ming Gu ◽  
...  
Keyword(s):  
Heat Transfer ◽  
Equivalent Circuit ◽  
Longitudinal Vibration ◽  
Piezoelectric Transformers ◽  
Transfer Device

Phase change heat transfer device for process heat applications

2010 ◽  
Vol 240 (10) ◽  
pp. 2409-2414 ◽  
Author(s):  
Piyush Sabharwall ◽  
Mike Patterson ◽  
Vivek Utgikar ◽  
Fred Gunnerson
Keyword(s):  
Heat Transfer ◽  
Phase Change ◽  
Process Heat ◽  
Phase Change Heat Transfer ◽  
Transfer Device

scholarly journals CFD analysis of a heat transfer device integrated wind tower system for hot and dry climate

2013 ◽  
Vol 112 ◽  
pp. 576-591 ◽  
Author(s):  
John Kaiser Calautit ◽  
Ben Richard Hughes ◽  
Hassam Nasarullah Chaudhry ◽  
Saud Abdul Ghani
Keyword(s):  
Heat Transfer ◽  
Cfd Analysis ◽  
Transfer Device ◽  
Tower System

Development and testing of a novel horizontal loop thermosyphon as a kW-class heat transfer device

2021 ◽  
pp. 117682
Author(s):  
Leonard Vasiliev ◽  
Alexander Zhuravlyov ◽  
Maxim Kuzmich ◽  
Vadzim Kulikouski
Keyword(s):  
Heat Transfer ◽  
Transfer Device

A solid‐state solar‐powered heat transfer device

1979 ◽  
Vol 50 (9) ◽  
pp. 5682-5685 ◽  
Author(s):  
Milivoj Belić ◽  
Joel I. Gersten
Keyword(s):  
Heat Transfer ◽  
Solid State ◽  
Solar Powered ◽  
Transfer Device

A Numerical Model of a Reciprocating-Mechanism Driven Heat Loop for Two-Phase High Heat Flux Cooling

2016 ◽  
Vol 8 (4) ◽  
Author(s):  
Olubunmi Popoola ◽  
Ayobami Bamgbade ◽  
Yiding Cao
Keyword(s):  
Heat Transfer ◽  
Heat Flux ◽  
Numerical Model ◽  
Performance Optimization ◽  
Numerical Study ◽  
High Heat ◽  
Working Fluid ◽  
High Heat Flux ◽  
Two Phase ◽  
Transfer Device

An effective design option for a cooling system is to use a two-phase pumped cooling loop to simultaneously satisfy the temperature uniformity and high heat flux requirements. A reciprocating-mechanism driven heat loop (RMDHL) is a novel heat transfer device that could attain a high heat transfer rate through a reciprocating flow of the two-phase working fluid inside the heat transfer device. Although the device has been tested and validated experimentally, analytical or numerical study has not been undertaken to understand its working mechanism and provide guidance for the device design. The objective of this paper is to develop a numerical model for the RMDHL to predict its operational performance under different working conditions. The developed numerical model has been successfully validated by the existing experimental data and will provide a powerful tool for the design and performance optimization of future RMDHLs. The study also reveals that the maximum velocity in the flow occurs near the wall rather than at the center of the pipe, as in the case of unidirectional steady flow. This higher velocity near the wall may help to explain the enhanced heat transfer of an RMDHL.

Reciprocating-Mechanism Driven Heat Loops and Their Applications

2003 ◽  
Author(s):  
Yiding Cao ◽  
Mingcong Gao
Keyword(s):  
Heat Transfer ◽  
Heat Flux ◽  
Electronics Cooling ◽  
Working Fluid ◽  
High Heat Flux ◽  
Two Phase ◽  
Condenser Section ◽  
Evaporator Section ◽  
Two Phase Heat Transfer ◽  
Transfer Device

This paper introduces a novel heat transfer mechanism that facilitates two-phase heat transfer while eliminating the so-called cavitation problem commonly encountered by a conventional pump. The heat transfer device is coined as the reciprocating-mechanism driven heat loop (RMDHL), which includes a hollow loop having an interior flow passage, an amount of working fluid filled within the loop, and a reciprocating driver. The hollow loop has an evaporator section, a condenser section, and a liquid reservoir. The reciprocating driver is integrated with the liquid reservoir and facilitates a reciprocating flow of the working fluid within the loop, so that liquid is supplied from the condenser section to the evaporator section under a substantially saturated condition and the so-called cavitation problem associated with a conventional pump is avoided. The reciprocating driver could be a solenoid-operated reciprocating driver for electronics cooling applications and a bellows-type reciprocating driver for high-temperature applications. Experimental study has been undertaken for a solenoid-operated heat loop in connection with high heat flux thermal management applications. Experimental results show that the heat loop worked very effectively and a heat flux as high as 300 W/cm2 in the evaporator section could be handled. The applications of the bellows-type reciprocating heat loop for gas turbine nozzle guide vanes and the leading edges of hypersonic vehicles are also illustrated. The new heat transfer device is expected to advance the current two-phase heat transfer device and open up a new frontier for further research and development.

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