Research Papers: Two-Phase Flow and Heat Transfer

Experimental and Analytical Studies of Reciprocating-Mechanism Driven Heat Loops (RMDHLs)

[+] Author and Article Information
Yiding Cao, Mingcong Gao

Department of Mechanical Engineering, Florida International University, Miami, FL 33199

J. Heat Transfer 130(7), 072901 (May 16, 2008) (6 pages) doi:10.1115/1.2909078 History: Received April 16, 2007; Revised August 23, 2007; Published May 16, 2008

This paper conducts experimental and analytical studies of a novel heat-transfer device, reciprocating-mechanism driven heat loop (RMDHL) that facilitates two-phase heat transfer while eliminating the so-called cavitation problem commonly encountered by a conventional pump. A RMDHL normally 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 300Wcm2 in the evaporator section could be handled. A working criterion has also been derived, which could provide a guidance for the design of a RMDHL.

Copyright © 2008 by American Society of Mechanical Engineers
Your Session has timed out. Please sign back in to continue.



Grahic Jump Location
Figure 1

Schematic of a RMDHL

Grahic Jump Location
Figure 2

Schematic of a solenoid driver integrated with the liquid reservoir

Grahic Jump Location
Figure 3

Schematic of a bellows-type RMDHL

Grahic Jump Location
Figure 4

Schematic axial cross-sectional view of a bellows-type reciprocating driver

Grahic Jump Location
Figure 5

A photograph of the fabricated RMDHL

Grahic Jump Location
Figure 6

Experimental setup: (1) heater, (2) heat loop, (3) cooling jacket, (4) solenoids, (5) switch, (6) power supply, (7) constant temperature circulator, (8) thermocouples, and (9) data acquisition system

Grahic Jump Location
Figure 7

Comparison of temperature distributions with pump on and off

Grahic Jump Location
Figure 8

Axial temperature distributions (Tc=50°C)

Grahic Jump Location
Figure 9

Axial temperature distributions (Tc=65°C)

Grahic Jump Location
Figure 10

Axial temperature distributions (Tc=40°C)

Grahic Jump Location
Figure 11

The initial state of the heat loop for the derivation of the working criterion

Grahic Jump Location
Figure 12

The final state of the heat loop for the derivation of the working criterion




Some tools below are only available to our subscribers or users with an online account.

Related Content

Customize your page view by dragging and repositioning the boxes below.

Related Journal Articles
Related eBook Content
Topic Collections

Sorry! You do not have access to this content. For assistance or to subscribe, please contact us:

  • TELEPHONE: 1-800-843-2763 (Toll-free in the USA)
  • EMAIL: asmedigitalcollection@asme.org
Sign In