Fluid flow and heat transfer characteristics of cross-cut heat sinks

Kim, Tae Young; Kim, Sung Jin

doi:10.1016/j.ijheatmasstransfer.2009.07.008

Cited by 54 publications

(18 citation statements)

References 21 publications

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“…Moreover, this observation is consistent with Kim and Kim's [22] study, which indicated that the thermal performance of a heat sink with a cross-cut is significantly greater than a heat sink with multiple cross-cuts. Likely, Chingulpitak and colleges [23] also stated that the cross-cut heat sink gave larger thermal performance than the convectional plate fin heat sink.…”

Section: Figs 7 (A) and (B) Show Comparison Between The Experimentalsupporting

confidence: 90%

An experimental investigation on the heat transfer and pressure drop characteristics of nanofluid flowing in microchannel heat sink with multiple zigzag flow channel structures

Duangthongsuk

Wongwises

2017

Experimental Thermal and Fluid Science

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Section: Figs 7 (A) and (B) Show Comparison Between The Experimentalsupporting

confidence: 90%

An experimental investigation on the heat transfer and pressure drop characteristics of nanofluid flowing in microchannel heat sink with multiple zigzag flow channel structures

Duangthongsuk

Wongwises

2017

Experimental Thermal and Fluid Science

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“…When VT 11 , VT 14 and VT 21 , VT 24 turn on, the load voltage is v L = E 1 + E 2 = 2E, and the output is a positive pulse. When VT 12 , VT 13 and VT 22 , VT 23 turn on, the load voltage is v L = −(E 1 + E 2 ) = −2E, and the output is a negative pulse. The output level of the transmitter is only +2E and −2E without +E, −E, and 0, which is different from the conventional cascaded multilevel inverters [24]- [26].…”

Section: A Cascaded Topology Of the Transmittermentioning

confidence: 99%

Loss Analysis and Air-Cooled Design for a Cascaded Electrical Source Transmitter

Xue¹,

Wang²,

Lin³

et al. 2015

Journal of Power Electronics

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Air-cooling method is adopted on the basis of the requirements for the thermal stability and convenient field use of an electrical source transmitter. The power losses of the transmitter are determined after calculating the losses of the alternating current (AC)-direct current (DC) power supply, the constant-current circuit, and the output circuit. According to the analysis of the characteristics of a heat sink with striped fins and a fan, the engineering calculation expression of the Nusselt number and the design process for air-cooled dissipation are proposed. Experimental results verify that the error between calculated and measured values of the transmitter losses is 12.2%, which meets the error design requirements of less than 25%. Steady-state average temperature rise of the heat sink of the AC-DC power supply is 22 °C, which meets the design requirements of a temperature rise between 20 °C and 40 °C. The transmitter has favorable thermal stability with 40 kW output power.

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“…A lot of researches have been carried out in the last years to describe the heat transfer phenomena and possibilities to enhance the heat transfer efficiency of heating surfaces (Bergles 1997;Kandlikar 2002;Gorenflo et al 2004;Kotthoff et al 2006;Kim and Kim 2009). Especially for electronic cooling convection and nucleate boiling processes are in focus of interest (Honda and Wei 2003;Honda and Wei 2004;Muzychka 2005;Ndao et al 2009).…”

Section: Heat Transfer Principlesmentioning

confidence: 99%

Design and realization of micro structured surfaces for thermodynamic applications

et al. 2011

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In the present work different micro structures with high potential for convection and nucleate boiling processes were presented. Based on literature appropriate micro structures were selected which should offer the possibility to enhance the heat transfer capability. By help of thermodynamic simulations it could be demonstrated that the convective heat transfer can be improved by use of micro structured surfaces. Especially calottes, micro channels and micro columns were determined. Primarily, the surface enlargement has the determining influence on the heat transfer efficiency. However, the design of the geometries and the arrangement of the structures also effect the heat transfer. Especially for forced convection processes the influence of these parameters has to be examined in further investigations. By use of electrochemical and laser beam machining the selected structures were manufactured in copper work pieces. With Jet-ECM realized micro structures offer a high exactness with excellent surface qualities. The high potential of Jet-ECM for a reproducible fabrication of micro structures for thermodynamic applications is obvious. Laser machined micro structures are distinguished by rough surfaces which can offer an additional positive effect on the heat transfer phenomena. So laser beam machining is also suitable for the reproducible machining of thermodynamically appropriate micro structures

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Fluid flow and heat transfer characteristics of cross-cut heat sinks

Cited by 54 publications

References 21 publications

An experimental investigation on the heat transfer and pressure drop characteristics of nanofluid flowing in microchannel heat sink with multiple zigzag flow channel structures

An experimental investigation on the heat transfer and pressure drop characteristics of nanofluid flowing in microchannel heat sink with multiple zigzag flow channel structures

Loss Analysis and Air-Cooled Design for a Cascaded Electrical Source Transmitter

Design and realization of micro structured surfaces for thermodynamic applications

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