An Experimental Apparatus for Two-phase Cooling of High Heat Flux Application using an Impinging Cold Plate and Dielectric Coolant

Hoang, Cong Hiep; Khalili, Sadegh; Ramakrisnan, Bharath; Rangarajan, Srikanth; Hadad, Yaser; Radmard, Vahideh; Sikka, Kamal; Schiffres, Scott N.; Sammakia, Bahgat

doi:10.23919/semi-therm50369.2020.9142831

Cited by 5 publications

(3 citation statements)

References 7 publications

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“…Figure 10 shows the state-of-the-art performance of various passive and active technologies including thermosiphons, cold plates, jet impingement, etc. [47][48][49][50][51][52][53][54] in comparison with MHS, in the form of the HTC plotted against surface superheat, with the size of the bubbles representing the heat flux at which the HTC is obtained. It [50,53], thermosiphons [48,49,52], jet impingement strategies [47,51], and air cooled heat sinks with 2-phase heat spreaders (vapor chambers) [54] are compared with membrane assisted heat sinks (MHS).…”

Section: Replacing Existing Technologiesmentioning

confidence: 99%

“…[47][48][49][50][51][52][53][54] in comparison with MHS, in the form of the HTC plotted against surface superheat, with the size of the bubbles representing the heat flux at which the HTC is obtained. It [50,53], thermosiphons [48,49,52], jet impingement strategies [47,51], and air cooled heat sinks with 2-phase heat spreaders (vapor chambers) [54] are compared with membrane assisted heat sinks (MHS). The heat transfer coefficient (HTC) is plotted as a function of the surface superheat (∆T) while the size of the bubbles represents the heat flux at which the HTC is obtained.…”

Section: Replacing Existing Technologiesmentioning

confidence: 99%

“…The heat transfer coefficient (HTC) is plotted as a function of the surface superheat (∆T) while the size of the bubbles represents the heat flux at which the HTC is obtained. Membrane assisted heat sinks (MHS) exhibit an HTC at least an order of magnitude higher than air cooled heat sinks [47][48][49][50][51][52][53][54].…”

Section: Replacing Existing Technologiesmentioning

confidence: 99%

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Data center energy efficiency enhancement using a two-phase heat sink with ultra-high heat transfer coefficient

Tamvada¹,

Moghaddam²

2022

Preprint

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This paper presents the latest progress on characterization of our membrane assisted phase-change heat sink (MHS) at conditions suitable for implementation in data centers (DCs). Experiments are conducted using water as the working fluid at a vapor space pressure (P vapor ) of 16 kPa, corresponding to a saturation temperature of ∼ 55 • C. This temperature is sufficiently lower than the silicon junction temperature of 80 • C. As anticipated, the overall performance of MHS at sub-atmospheric pressure is lower compared to analogous tests at atmospheric pressure. In agreement with previous studies on MHS, the critical heat flux limit (CHF) increases with enhancement of the heat transfer area ratio (A r ) and liquid space pressure (P pool ). We report a maximum CHF of 670 W/cm 2 on a surface with an enhanced area ratio of 3.45, multiple times greater than the CHF reported hitherto by a comparable two-phase heat sink in literature. Heat transfer coefficients (HTC) as high as ∼ 1 MW/m 2 -K are obtained. These record performance data along with unique characteristics of the MHS promise to greatly benefit next generation highly energy efficient DCs.

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