Assessment of the Multi-Fluid Evaporator Technology

Quinn, Gregory; O’Connor, Edward W.

doi:10.1063/1.2845013

Cited by 2 publications

(1 citation statement)

References 2 publications

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“…More recently, Liu et al [11] investigated arrays of expanding microchanneis in other flow pattems with a mind toward engineering applications. Expanding channels have found application in fields outside of forced-convection flow boi]ing, inc]uding a flash-evaporator for once-through space system cooling [12] and open-top heat pipe evaporators [13].…”

Section: Introductionmentioning

confidence: 99%

Experimental Measurements of Critical Heat Flux in Expanding Microchannel Arrays

Miner¹,

Phelan²,

Odom³

et al. 2013

Journal of Heat Transfer

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The effect of an expanding microchannel cross-section onflow boiling critical heat flux (CHF) is experimentally investigated across four rates of expansion. A pumped-loop apparatus is developed to boil R-134a in an array of microchanneis cut into copper; a test section is designed to facilitate interchange of the microchannel specimens, allowing consistency across experiments. An optimum expansion angle allowing maximum heat flux is observed, the location of which increases with the mass flow rate. The boiling number does not indicate any optimum in the range observed, showing a nearly monotonie increase with expansion angle. The familiar increase in critical heat flux with mass flux is observed, though expansion shifts the CHF-massflux curves in a favorable direction. The existence of an optimum expansion angle confirms an earlier qualitative hypothesis by the authors and suggests that microchannel heat sinks offer opportunities for methodical improvement of flow boiling stability and performance.

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Section: Introductionmentioning

confidence: 99%