Concept

Critical heat flux

Publications associées (184)

High-Power 1.48-μm Wafer-Fused Optically Pumped Semiconductor Disk Laser

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An output power up to 5 W at 1.48- m wavelength is achieved from an optically pumped semiconductor disk laser. An active region composed of an AlGaInAs/InP heterostructure grown on an InP substrate was wafer fused with an AlGaAs/GaAs Bragg reflector grown ...

Institute of Electrical and Electronics Engineers2011

Prediction Of Critical Heat Flux In Microchannels

John Richard Thome, Lorenzo Consolini

An overview of the state-of-the-art of predicting critical heat flux during saturated flow boiling in microchannels is presented. First, a selection of experimental results is described for single channels and for multi-channels in parallel, including non- ...

Springer, 101 Philip Drive, Norwell, Ma 02061 Usa2010

Saturated critical heat flux in a multi-microchannel heat sink fed by a split flow system

John Richard Thome

An extensive experimental campaign has been carried out for the measurement of saturated critical heat flux in a multi-microchannel copper heat sink. The heat sink was formed by 29 parallel channels that were 199 mu m wide and 756 mu m deep. In order to in ...

Elsevier2010

Critical heat flux in multi-microchannel copper elements with low pressure refrigerants

John Richard Thome, Jung Eung Park

New saturated critical heat flux (CHF) data have been obtained experimentally in two different multi-microchannel heat sinks made in copper with three low pressure refrigerants (R134a, R236fa, R245fa). one of the test sections has 20 parallel rectangular c ...

Elsevier2010

Macro-to-Microchannel Transition in Two-Phase Flow and Evaporation

Chin Lee Ong

Continuous development of highly efficient and compact cooling elements are driven by extensive developments of Micro-Electro-Mechanical Systems (MEMS) devices such as microprocessors or micro high-powered laser systems. As microprocessors continue to head ...

EPFL2010

A novel time strip flow visualisation technique for investigation of intermittent dewetting and dryout in elongated bubble flow in a microchannel evaporator

John Richard Thome, Navid Borhani, Bruno Agostini

A flow visualisation study of flow boiling of R245fa in silicon multi-microchannels at low mass flux and moderate heat flux has been carried out with a high speed digital camera. The micro-evaporator had 67 channels of length 20 mm, width 223 mu m, and hei ...

2010

A heat transfer model for evaporation of coalescing bubbles in micro-channel flow

John Richard Thome, Lorenzo Consolini

The current study presents a one-dimensional model of confined coalescing bubble flow for the prediction of micro-channel convective boiling heat transfer. Coalescing bubble flow has recently been identified as one of the characteristic flow patterns to be ...

Elsevier2010

Mechanisms Of Boiling In Microchannels: Critical Assessment

John Richard Thome, Lorenzo Consolini

Numerous characteristic trends and effects have been observed in published studies on two-phase micro-channel boiling heat transfer. While macro-scale flow boiling heat transfer may be decomposed into nucleate and convective boiling contributions, at the m ...

Springer, 101 Philip Drive, Norwell, Ma 02061 Usa2010

Heat Transfer and Visualization of Falling Film Evaporation on a Tube Bundle

Marcel Christians

Horizontal falling film evaporators have the potential of displacing flooded evaporators in industry, due to advantages such as lower required refrigerant charge and lower pressure drop. However, there is a need to improve the understanding of falling film ...

EPFL2010

A Simple Model for the Afternoon and Early-Evening Decay of Turbulence over Different Land Surfaces

Marc Parlange, Chad Higgins, Eric Richard Pardyjak, Daniel Nadeau

Recent years have seen an increasing interest in the late-afternoon transition between the convective and stable regimes of the atmospheric boundary layer. There are several differences between the two regimes. On one hand, the convective boundary layer is ...

2010

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