A swirl flow evaporative cold plate

This paper is devoted to the analysis of the influence of thermal pads on electric, optical, and thermal parameters of power LEDs. Measurements of parameters, such as thermal resistance, optical efficiency, and optical power, were performed for selected types of power LEDs operating with a thermal pad and without it at different values of the diode forward current and temperature of the cold plate. First, the measurement set-up used in the paper is described in detail. Then, the measurement results obtained for both considered manners of power LED assembly are compared. Some characteristics that illustrate the influence of forward current and temperature of the cold plate on electric, thermal, and optical properties of the tested devices are presented and discussed. It is shown that the use of the thermal pad makes it possible to achieve more advantageous values of operating parameters of the considered semiconductor devices at lower values of their junction temperature, which guarantees an increase in their lifetime.

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Experimental investigation of thermal performance of novel cold plate design used in a Li-ion pouch-type battery

Applied Thermal Engineering ◽

10.1016/j.applthermaleng.2021.116885 ◽

2021 ◽

pp. 116885

Author(s):

Orhan Kalkan ◽

Ali Celen ◽

Kadir Bakirci ◽

Ahmet Selim Dalkilic

Keyword(s):

Experimental Investigation ◽

Thermal Performance ◽

Cold Plate ◽

Plate Design ◽

Li Ion

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Turbulent swirl flow analysis by Kolmogorov's similarity hypotheses

PAMM ◽

10.1002/pamm.202000051 ◽

2021 ◽

Vol 20 (1) ◽

Author(s):

Ðorđe S. Čantrak ◽

Novica Z. Janković ◽

Miloš S. Nedeljković

Keyword(s):

Flow Analysis ◽

Swirl Flow

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Numerical simulation of swirling flow effect on the first stage vane film cooling distribution

International Journal of Modeling Simulation and Scientific Computing ◽

10.1142/s1793962316500318 ◽

2016 ◽

Vol 07 (03) ◽

pp. 1650031

Author(s):

Hong Yin

Keyword(s):

Flow Field ◽

Film Cooling ◽

Swirling Flow ◽

Cooling System ◽

Leading Edge ◽

Suction Side ◽

Local Area ◽

Swirl Flow ◽

Flow Effect ◽

Recirculation Flow

In advanced gas turbine technology, lean premixed combustion is an effective strategy to reduce peak temperature and thus, NO[Formula: see text] emissions. The swirler is adopted to establish recirculation flow zone, enhancing mixing and stabilizing the flame. Therefore, the swirling flow is dominant in the combustor flow field and has impact on the vane. This paper mainly investigates the swirling flow effect on the turbine first stage vane cooling system by conducting a group of numerical simulations. Firstly, the numerical methods of turbulence modeling using RANS and LES are compared. The computational model of one single swirl flow field is considered. Both the RANS and LES results give reasonable recirculation zone shape. When comparing the velocity distribution, the RANS results generally match the experimental data but fail to at some local area. The LES modeling gives better results and more detailed unsteady flow field. In the second step, the RANS modeling is incorporated to investigate the vane film cooling performance under the swirling inflow boundary condition. According to the numerical results, the leading edge film cooling is largely altered by the swirling flow, especially for the swirl core-leading edge aligned case. Compared to the pressure side, the suction side film cooling is more sensitive to the swirling flow. Locally, the film cooling jet is lifted and turned by the strong swirling flow.

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The Influence of Different Types of Nanofluid on Thermal and Fluid Flow Performance of Liquid Cold Plate

International Journal of Engineering & Technology ◽

10.14419/ijet.v7i4.35.22346 ◽

2018 ◽

Vol 7 (4.35) ◽

pp. 148 ◽

Cited By ~ 1

Author(s):

Nur Irmawati Om ◽

Rozli Zulkifli ◽

P. Gunnasegaran

Keyword(s):

Heat Transfer ◽

Fluid Flow ◽

Steady State ◽

Pressure Drop ◽

Volume Fraction ◽

Cold Plate ◽

Governing Equations ◽

Flow And Heat Transfer ◽

Different Types ◽

Volume Method

The influence of utilizing different nanofluids types on the liquid cold plate (LCP) is numerically investigated. The thermal and fluid flow performance of LCP is examined by using pure ethylene glycol (EG), Al2O3-EG and CuO-EG. The volume fraction of the nanoparticle for both nanofluid is 2%. The finite volume method (FVM) has been used to solved 3-D steady state, laminar flow and heat transfer governing equations. The presented results indicate that Al2O3-EG able to provide the lowest surface temperature of the heater block followed by CuO-EG and EG, respectively. It is also found that the pressure drop and friction factor are higher for Al2O3-EG and CuO-EG compared to the pure EG.

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Thermal Analysis of Cold Plate with Different Configurations for Thermal Management of a Lithium-Ion Battery

Batteries ◽

10.3390/batteries6010017 ◽

2020 ◽

Vol 6 (1) ◽

pp. 17

Author(s):

Seyed Saeed Madani ◽

Erik Schaltz ◽

Søren Knudsen Kær

Keyword(s):

Thermal Analysis ◽

Temperature Distribution ◽

Lithium Ion Battery ◽

Thermal Management ◽

Electric Vehicles ◽

Heat Dissipation ◽

Lithium Ion ◽

Cold Plate ◽

Liquid Cooling ◽

Cooling Design

Thermal analysis and thermal management of lithium-ion batteries for utilization in electric vehicles is vital. In order to investigate the thermal behavior of a lithium-ion battery, a liquid cooling design is demonstrated in this research. The influence of cooling direction and conduit distribution on the thermal performance of the lithium-ion battery is analyzed. The outcomes exhibit that the appropriate flow rate for heat dissipation is dependent on different configurations for cold plate. The acceptable heat dissipation condition could be acquired by adding more cooling conduits. Moreover, it was distinguished that satisfactory cooling direction could efficiently enhance the homogeneity of temperature distribution of the lithium-ion battery.

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