Thin hybrid capillary two-phase cooling system

Shaeri, Mohammad Reza; Bonner, Richard W.; Ellis, Michael C.

doi:10.1016/j.icheatmasstransfer.2020.104490

Thin hybrid capillary two-phase cooling system

Journal Article · Mon Jan 27 23:00:00 EST 2020 · International Communications in Heat and Mass Transfer

DOI:https://doi.org/10.1016/j.icheatmasstransfer.2020.104490· OSTI ID:1803455

Shaeri, Mohammad Reza ^[1]; Bonner, Richard W. ^[2]; Ellis, Michael C. ^[2]

Advanced Cooling Technologies, Inc., Lancaster, PA (United States); OSTI
Advanced Cooling Technologies, Inc., Lancaster, PA (United States)

A novel hybrid two-phase cooling system was developed that integrated a mechanically pumped two-phase loop with a capillary-driven two-phase cooling device. The latter cooling mechanism was based on evaporation/boiling from wick structures made by sintering copper particles on the interior surfaces of a copper cold plate. The cold plate provided cooling to two surfaces and each of them included four heaters in series. The novelty of the developed technology was preventing flooding of the evaporator wicks by isolating the evaporation surface from the pumped liquid flow that fed them. This arrangement allowed for a high liquid feed flow rate much greater than would be allowed by a capillary pumped system while maintaining a low thermal resistance at the evaporation surface. Using this approach, the cooling system removed over 850 W with a low pumping power below 1.0 W while using R245fa as the working fluid. The equivalent heat fluxes exceeded 970 W/cm² over areas less than 0.12 cm². The measured thermal resistance was as low as 0.09 K-cm²/W. The presented thermal management solution enables an increase in the power of high heat flux electronic devices beyond the state-of-the-art.

View Accepted Manuscript (DOE)

Research Organization:: Advanced Cooling Technologies, Inc., Lancaster, PA (United States)

Sponsoring Organization:: USDOE Office of Science (SC), Engineering & Technology. Office of Small Business Innovation Research (SBIR) and Small Business Technology Transfer (STTR) Programs

Grant/Contract Number:: SC0018845

OSTI ID:: 1803455

Alternate ID(s):: OSTI ID: 2325323

Journal Information:: International Communications in Heat and Mass Transfer, Journal Name: International Communications in Heat and Mass Transfer Vol. 112; ISSN 0735-1933

Publisher:: ElsevierCopyright Statement

Country of Publication:: United States

Language:: English

References (15)

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capillary-driven two-phase cooling
flooded evaporator wick
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hybrid two-phase cooling
pumped two-phase loop

Thin hybrid capillary two-phase cooling system

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