Heat transfer characteristics of spray cooling in a closed loop

Lin, Lanchao; Ponnappan, Rengasamy

doi:10.1016/s0017-9310(03)00217-5

Cited by 291 publications

(106 citation statements)

References 7 publications

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“…Lin et al [11] found that heat flux increases with the increase in volumetric flux for a given surface superheat and CHF increases with the increase in volumetric flux or pressure drop. In a closed loop spray cooling system, if the vapor is non condensable, it affects the overall heat transfer at lower heat fluxes because of high thermal resistance to condensation heat transfer.…”

Section: Steady Flow Spray Coolingmentioning

confidence: 99%

Investigation of spray cooling schemes for dynamic thermal management

Yata

Bostanci

2017

2017 16th IEEE Intersociety Conference on Thermal and Thermomechanical Phenomena in Electronic Systems (ITherm)

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Section: Steady Flow Spray Coolingmentioning

confidence: 99%

Investigation of spray cooling schemes for dynamic thermal management

Yata

Bostanci

2017

2017 16th IEEE Intersociety Conference on Thermal and Thermomechanical Phenomena in Electronic Systems (ITherm)

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“…Spray cooling has achieved higher heat transfer coefficients and critical heat fluxes (CHF) than pool boiling or liquid jet impingement boiling (Mudawar, 2000;Chow et al, 1997;Tilton, 1989). With water as the working fluid, spray cooling has achieved a heat flux on the order of I kW/cm2 in terrestrial gravity (Lin and Ponnappan, 2003). Furthermore, the spatial distribution of the heat transfer coefficient is much more uniform in spray impingement boiling than in liquid jet impingement boiling (Bemardin et al, 1996).…”

Section: Subject Terms Spray Cooling Boilingmentioning

confidence: 99%

Electromagnetic Control of High Heat-Flux Spray Impingement Boiling Under Microgravity Conditions

Gray¹,

Kuhlman²,

Glaspell³

et al. 2007

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Public reporting burden for this collection of information is estimated to average 1 hour per response, including the time for reviewing instructions, searching existing data sources. gathering and maintaining the data needed, and completing and reviewing this collection of information. Send comments regarding this burden estimate or any other aspect of this cOllectioni of information, including suggestions for reducing this burden to Departnient of Defense. Washington Headquarters Services, Directorate for Information Operations and . 1215 Jefferson Davis Highway, Suite 1204, Arlington. VA 22202-4302. Respondents should be aware that notwithstanding any other provision of law, no person shall be subject to any penalty for failing to comply with a collection of information i it does not display a currently valid OMB control number. PLEASE DO NOT RETURN YOUR FORM TO THE ABOVE ADDRESS. REPORT DATE (DD-MM-YYYY)2. REPORT TYPE 14. ABSTRACT The primary goal of this project was to discover how to most effectively use electromagnetic forces to enhance spray impingement boiling heat transfer in microgravity (jg). This project was closely coordinated with the non-electromagnetic spray impingement boiling experiments conducted by Dr. Kirk L. Yerkes of the Air Force Research Laboratory (AFRL) . The West Virginia University (WVU) investigation of electrical body forces to enhance and control spray impingement boiling extended the AFRL research. The computational phase of the WVU project was based on the commercial multiphysics code CFD-ACE+, which was successfully modified to incorporate the Coulomb and electric Kelvin forces. DATES COVERED (From -ToWVU's ground-based experiments demonstrated for the first time that modest increases in heat transfer coefficient and Nusselt number can be achieved in spray impingement boiling by using electrical forces, thus confirming the fundamental hypothesis of this research.Further increases in heat transfer performance are likely to result from a better understanding of the relevant microphysics and better electrode designs. Experimental results have been used to estimate the time scales for various phenomena that occur in spray impingement boiling, which could lead to improved electrode designs. SUBJECT ABSTRACTThe primary goal of this project was to discover how to most effectively use electromagnetic forces to enhance spray impingement boiling in microgravity (ýLg). This project was closely coordinated with the non-electromagnetic spray impingement boiling heat transfer experiments conducted by Dr. Kirk L. Yerkes of the Air Force Research Laboratory (AFRL). The West Virginia University (WVU) investigation of electrical body forces to enhance and control spray impingement boiling extended the AFRL research. The computational phase of the WVU project was based on the commercial multiphysics code CFD-ACE+, which was successfully modified to incorporate the Coulomb and electric Kelvin forces. WVU's ground-based experiments demonstrated for the first time that modest increases in heat tra...

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“…High heat flux cooling is also required in applications such as high heat-load optical components, laser diode arrays, and X-ray medical devices. Different methods have been proposed to cope with the high heat flux in heat exchangers, such as spray cooling [1][2][3], jet impingement [4], heat pipes [5,6], and microchannels [7][8][9]. Heat transfer in microchannels is enhanced by large heat transfer areas per unit volume.…”

Section: Introductionmentioning

confidence: 99%

Asymmetric heat transfer in liquid–liquid segmented flow in microchannels

Che¹,

Wong²,

Nguyen³

et al. 2014

International Journal of Heat and Mass Transfer

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Heat transfer in segmented flow in microchannels can be significantly enhanced by recirculating vortices, due to the presence of interfaces. The processes of heat transfer in segmented flow subjecting to asymmetric boundary conditions are studied. Two types of boundary conditions are considered, asymmetric constant surface temperature and asymmetric constant surface heat flux. The paths of heat flow and the effects of the thermal conductivity, the plug length, and the Peclet number are studied.The results show different features from those at symmetric boundary conditions. The heat transfer process at asymmetric boundary conditions is controlled by both thermal advection and diffusion at the mid-plane of the channel. The coupling effects between the adjacent plugs complicate the process by the heat transfer across plug-plug interfaces.

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Heat transfer characteristics of spray cooling in a closed loop

Cited by 291 publications

References 7 publications

Investigation of spray cooling schemes for dynamic thermal management

Investigation of spray cooling schemes for dynamic thermal management

Electromagnetic Control of High Heat-Flux Spray Impingement Boiling Under Microgravity Conditions

Asymmetric heat transfer in liquid–liquid segmented flow in microchannels

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