Complete suppression of flow boing instability in microchannel heat sinks using a combination of inlet restrictor and flexible dampener

Hedau, Gaurav; Raj, Rishi; Saha, Sandip K.

doi:10.1016/j.ijheatmasstransfer.2021.121937

Cited by 15 publications

(1 citation statement)

References 37 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…2(b)), any hotspots generated on the chip surface is quickly mitigated through the rushing of the liquid to the hotspots (see fig. 11(a)) as opposed to the common problem of vapor backflow suffered by conventional microchannel heat sinks [56]. Secondly, MHSs exhibit a self-regulating pressure control due to the presence of the membrane, which can be leveraged to connect multiple heat sinks through a common liquid and vapor loop (see fig.…”

Section: System Level Integration Benefitsmentioning

confidence: 99%

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

Tamvada¹,

Moghaddam²

2022

Preprint

View full text Add to dashboard Cite

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.

show abstract

Section: System Level Integration Benefitsmentioning

confidence: 99%