Ultra-high critical heat flux (CHF) for subcooled water flow boiling—II: high-CHF database and design equations

Hall, David D.; Mudawar, Issam

doi:10.1016/s0017-9310(98)00242-7

Cited by 96 publications

(32 citation statements)

References 24 publications

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“…Saturated thermo-physical properties were evaluated at the outlet pressure, (P out ) cal . The value of the (P out ) cal is evaluated from the following equations (10) .…”

Section: Chf Against Inlet Subcoolingmentioning

confidence: 99%

Critical Heat Fluxes of Subcooled Water Flow Boiling against Inlet Subcooling in Short Vertical Tube

Hata

Komori

Shiotsu

et al. 2004

JSME international journal. Ser. B, Fluids and thermal engineer

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The critical heat fluxes (CHFs) of subcooled water flow boiling for the test tube inner diameters (d = 3 and 6 mm) and the heated lengths (L = 67, 120 and 150 mm) are systematically measured for the flow velocities (u = 4.0 to 13.3 m/s), the inlet subcoolings (∆T sub,in = 48 to 148 K), the outlet subcoolings (∆T sub,out = 10.5 to 95.1 K), the inlet pressure (P in = 753 to 995 kPa) and the outlet pressure

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“…Saturated thermo-physical properties were evaluated at the outlet pressure, (P out ) cal . The value of the (P out ) cal is evaluated from the following equations (10) .…”

Section: Chf Against Inlet Subcoolingmentioning

confidence: 99%

Critical Heat Fluxes of Subcooled Water Flow Boiling against Inlet Subcooling in Short Vertical Tube

Hata

Komori

Shiotsu

et al. 2004

JSME international journal. Ser. B, Fluids and thermal engineer

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“…These experiments yielded the highest recorded CHF value for a uniformly heated tube of W/cm [61], [62]. Fig.…”

Section: Merits Of Two-phase Microchannel and Minichannelmentioning

confidence: 74%

“…Boiling requires that the device temperature exceed the saturation temperature of Fluorinert liquid (56)(57)(58)(59)(60)(61)(62)(63)(64)(65)(66)(67)(68)(69)(70)(71)(72). The liquid adjacent to the device surface has to be superheated by a few degrees above the saturation temperature for the first bubbles to begin forming at and departing from the device surface.…”

Section: B Phase-change Coolingmentioning

confidence: 99%

Assessment of high-heat-flux thermal management schemes

Mudawar¹

ITHERM 2000. The Seventh Intersociety Conference on Thermal and Thermomechanical Phenomena in Electronic Systems (Cat. No.00CH3

193

240

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Abstract-This paper explores the recent research developments in high-heat-flux thermal management. Cooling schemes such as pool boiling, detachable heat sinks, channel flow boiling, microchannel and mini-channel heat sinks, jet-impingement, and sprays, are discussed and compared relative to heat dissipation potential, reliability, and packaging concerns. It is demonstrated that, while different cooling options can be tailored to the specific needs of individual applications, system considerations always play a paramount role in determining the most suitable cooling scheme. It is also shown that extensive fundamental electronic cooling knowledge has been amassed over the past two decades. Yet there is now a growing need for hardware innovations rather than perturbations to those fundamental studies. An example of these innovations is the cooling of military avionics, where research findings from the electronic cooling literature have made possible the development of a new generation of cooling hardware which promise order of magnitude increases in heat dissipation compared to today's cutting edge avionics cooling schemes.

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“…Note that L ipt and L opt are 0.105 m and 0.053 m, respectively. The inlet and outlet pressures were also evaluated using the pressure drop model (Hall and Mudawar, 1999). Results derived from Eqs.…”

Section: Experimental Methodsmentioning

confidence: 99%

Transient critical heat flux for subcooled boiling of water flowing upward through a vertical small-diameter tube with exponentially increasing heat inputs

Shibahara

Fukuda

Liu

et al. 2016

JTST

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Knowledge of transient critical heat flux (CHF) for subcooled boiling of water flow is important for the design of cooling devices such as fusion reactor divertor. Heating occurs rapidly in the divertor and the heat flux is estimated to reach 10 MW/m 2 because of plasma disruption. To cope with such a heat flux under the transient condition, the use of a small inner diameter tube (< 3 mm diameter) is recommended, since the use of a smaller inner diameter tube results in a higher CHF. The transient CHF of subcooled boiling of water was measured for a 1.0 mm inner diameter tube, which was heated exponentially, with inlet subcoolings ranged from 82 to 145 K and a flow velocity of 10 m/s. The heat generation rate of the tube was exponentially increased according to the function Q 0 exp(t/). E-folding time, , ranged from 182 ms to 30.5 s. It was found that the transient CHF increased as the e-folding time decreased and that CHF of the small-diameter tube was higher than that of conventional channels. This indicated that CHF is affected by the e-folding time under transient conditions.

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Ultra-high critical heat flux (CHF) for subcooled water flow boiling—II: high-CHF database and design equations

Cited by 96 publications

References 24 publications

Critical Heat Fluxes of Subcooled Water Flow Boiling against Inlet Subcooling in Short Vertical Tube

Critical Heat Fluxes of Subcooled Water Flow Boiling against Inlet Subcooling in Short Vertical Tube

Assessment of high-heat-flux thermal management schemes

Transient critical heat flux for subcooled boiling of water flowing upward through a vertical small-diameter tube with exponentially increasing heat inputs

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