Design, And Manufacturing A Small-scale Wind Tunnel for Heat Transfer Analysis of Flat Plate And Finned Plate Heat Sinks

The processed wood industry urgently needs a dryer to improve the quality of its production. One of the important components in a dryer is a heat exchanger. To support a durable heat transfer process, a superior material is needed. The aim of the study was to analyze the effectiveness of the application of cross-flow flat plate heat exchangers to be used in wood dryers and compare the materials used and simulate heat transfer on cross-flow flat plate heat exchangers using Computational Fluid Dynamic simulations. The results showed that there was a variation in the temperature out of dry air and gas on the flat plate heat exchanger and copper material had a better heat delivery by reaching the temperature out of dry air and gas on the flat plate type heat exchanger of successive cross flow and. overall heat transfer coefficient value and the effectiveness value of the heat exchanger of the heat transfer characteristics that occur with the cross-flow flat plate type heat exchanger in copper material of 251.74725 W/K and 0.25.

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Fluid Flow and Heat Transfer of Liquid Sodium in Small-Scale Heat Sinks With Different Geometries

10.1115/fedsm2021-65869 ◽

2021 ◽

Author(s):

Mahyar Pourghasemi ◽

Nima Fathi

Keyword(s):

Heat Transfer ◽

Reynolds Number ◽

Cross Sections ◽

Heat Sink ◽

Volume Ratio ◽

Heat Sinks ◽

Liquid Sodium ◽

Small Scale ◽

Nusselt Numbers ◽

The Difference

Abstract 3-D numerical simulations are performed to investigate liquid sodium (Na) flow and the heat transfer within miniature heat sinks with different geometries and hydraulic diameters of less than 5 mm. Two different straight small-scale heat sinks with rectangular and triangular cross-sections are studied in the laminar flow with the Reynolds number up to 1900. The local and average Nusselt numbers are obtained and compared against eachother. At the same surface area to volume ratio, rectangular minichannel heat sink leads to almost 280% higher convective heat transfer rate in comparison with triangular heat sink. It is observed that the difference between thermal efficiencies of rectangular and triangular minichannel heat sinks was independent of flow Reynolds number.

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HEAT TRANSFER ANALYSIS OF FLAT PLATE TYPE DOMESTIC SOLAR WATER HEATER

Sun: Mankind's Future Source of Energy ◽

10.1016/b978-1-4832-8407-1.50312-3 ◽

1978 ◽

pp. 1625-1628

Author(s):

V.K. Gupta ◽

N.K. Tiwari ◽

H.R. Tyagi

Keyword(s):

Heat Transfer ◽

Flat Plate ◽

Heat Transfer Analysis ◽

Solar Water Heater ◽

Water Heater ◽

Solar Water ◽

Plate Type

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High Power CPU Cooling Experiment

ASME 1995 15th International Computers in Engineering Conference and the ASME 1995 9th Annual Engineering Database Symposium ◽

10.1115/cie1995-0838 ◽

1995 ◽

Author(s):

Elizabeth B. Nadworny ◽

T. Gary Yip ◽

Nader Farag

Keyword(s):

Heat Transfer ◽

High Power ◽

Power Dissipation ◽

Heat Removal ◽

Data Acquisition System ◽

Heat Sinks ◽

Small Scale ◽

Heat Transfer Area ◽

Pin Fin ◽

Transfer Parameters

Abstract This experimental study focuses on the enhancement of the heat removal process by modifying the geometry of pin fin heat sinks, while maintaining the same effective heat transfer area. The pins are cut at an angle to reduce the blockage of air flow across the surface. To perform this study, a small scale wind tunnel facility has been designed specifically for testing high power dissipation processors and other ULSI components. The facility is fully automated and controlled by an HP3852A Data Acquisition System interfaced with a 486 based PC computer. The average surface temperature, Reynolds number, Nusselt number and other relevant heat transfer parameters were reduced from the data collected. Results from the study show that a heat sink with an angled trailing edge produces the greatest enhancement of heat removal. The mechanism for the improved heat transfer is the larger temperature gradient across the surface, which is obtained by lowering the minimum temperature on the surface.

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