A thermosiphon loop for high heat flux removal using flow boiling of ethanol in OMM with taper

Panse, Sanskar S.; Kandlikar, Satish G.

doi:10.1016/j.ijheatmasstransfer.2016.09.020

Cited by 19 publications

(7 citation statements)

References 25 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In addition, system pressure is measured. The flowrate of the working medium is measured at the inlet to the evaporator (7) and at the outlet of the liquid pipeline from the separator (8). The flow rate in the vapour pipeline must be estimated from the mass balance.…”

Section: Methodsmentioning

confidence: 99%

“…Besides, at low heat load in steady state operation, the total pressure drop in two phase line of the system with separation is lower than that of the system without separation. Another utilization of microchannels in passive, gravitational systems has been realized by Panse and Kandlikar [7]. They used Open Microchannel Manifold (OMM) with taper configuration as an evaporator in thermosiphon loop.…”

Section: State Of the Artmentioning

confidence: 99%

See 1 more Smart Citation

Selected thermal and flow issues in a reversed thermosiphon with a steam liquid lifter

2018

View full text Add to dashboard Cite

The work presents initial studies of a reversed thermosiphon with a steam liquid lifter and a minigap evaporator. The main interest of the authors is the evaporator, especially the heat exchange efficiency and flow issues, such as maldistribution and pressure drop. However, because the thermosiphon circuit of such a construction is characterized by cyclic working conditions, which are quite difficult in analysis the authors focused on this specificity first. The article presents the concept of a test circuit and preliminary results for distilled water and for a minigap evaporator with a smooth heat exchange surface 100 x 200 mm and minigap thickness of 1 mm. Visualizations of the separator's work and the minigap boiling structures are presented.

show abstract

Section: Methodsmentioning

confidence: 99%

Section: State Of the Artmentioning

confidence: 99%

Selected thermal and flow issues in a reversed thermosiphon with a steam liquid lifter

2018

View full text Add to dashboard Cite

show abstract

“…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%

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

“…The heat transfer intensification in passive methods is of interest to authors again [17]. A good example of passive method is the thermosiphon loop, which has been used widely before and is now the focus of research attention again [18].…”

Section: Introductionmentioning

confidence: 99%

Flow Boiling in Minigap in the Reversed Two-Phase Thermosiphon Loop

2019

View full text Add to dashboard Cite

The paper presents the results of experimental investigations of a model of a heat exchanger featuring a minigap, which is perceived as an evaporator for an inverted thermosiphon. The system works with a single component test fluid. The tested evaporator generates pumping power in the test loop in a way similar to the mammoth pump. The tests regarded a module of the heat exchanger, consisting of a hot leg and a cold leg with the width by the length of 0.1 × 0.2 m, heated by a uniform heat flux. In the tests, the minigaps of 1, 2 and 3 mm were formed. Two fluids, namely, distilled water and ethanol, were tested in the facility. Two-phase flow structures for both working fluids and various operational parameters, together with comprehensive visualization material, are presented. The specifics of pressure changes and its influence on operating parameters and flow structure are discussed.

show abstract

A thermosiphon loop for high heat flux removal using flow boiling of ethanol in OMM with taper

Cited by 19 publications

References 25 publications

Selected thermal and flow issues in a reversed thermosiphon with a steam liquid lifter

Selected thermal and flow issues in a reversed thermosiphon with a steam liquid lifter

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

Flow Boiling in Minigap in the Reversed Two-Phase Thermosiphon Loop

Contact Info

Product

Resources

About