Optimization of heat transfer properties of the directional solidification furnace by modifying heat exchanger blocks

ABSTRACTA numerical model of heat transfer by combined conduction, radiation and convection was developed using the FIDAP finite element code for NASA's Advanced Automated Directional Solidification Furnace (AADSF). The prediction of the temperature gradient in an ampoule with HgCdTe is a necessity for the evaluation of whether or not the temperature set points for furnace heaters and the details of cartridge design ensure optimal crystal growth conditions for this material and size of crystal. A prediction of crystal/melt interface shape and the flow patterns in HgCdTe are available using a separate complementary model.

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Heat transfer properties of aqueous carbon nanotubes nanofluids in coaxial heat exchanger under laminar regime

Experimental Thermal and Fluid Science ◽

10.1016/j.expthermflusci.2014.03.003 ◽

2014 ◽

Vol 55 ◽

pp. 174-180 ◽

Cited By ~ 37

Author(s):

Salma Halelfadl ◽

Patrice Estellé ◽

Thierry Maré

Keyword(s):

Heat Transfer ◽

Carbon Nanotubes ◽

Heat Exchanger ◽

Laminar Regime ◽

Transfer Properties

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A Study on the Heat Transfer in Shell and Tube Heat Exchanger with Various Baffle Types

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.727-728.453 ◽

2015 ◽

Vol 727-728 ◽

pp. 453-458

Author(s):

Jae Hoon Lee ◽

Si Pom Kim ◽

Seong Jun Kim

Keyword(s):

Heat Transfer ◽

Heat Exchanger ◽

Heating Surface ◽

Flow Region ◽

Transfer Performance ◽

Tube Heat Exchanger ◽

Design Variables ◽

Shell And Tube ◽

Save Energy ◽

Transfer Properties

Recently, variousresearches and developments of heat exchangers with high thermal efficiencyhave been in progress to save energy. Baffles are used as design variables in a way that enhancesheat transfer performance of shell and tube heat exchanger. There have beenvarious of researches and developments in the relations between baffles andheat transfer performance. Existing studies on shell and tube heat exchangersare mainly about heat transfer properties of either segmental type baffles orhelical baffles. However, there is inadequateof study with comparisons between the two types ofbaffles. Thus, this paper aims to research changes in heat transfer properties according to thenumber of segmental and helical baffles. It shows pressure drop, temperaturedifference of inlet and outlet, heating surface area of inner flow region, andheat transfer coefficient in tubes.

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Experimental Research on Resistance and Heat Transfer Properties of Corrugated Plate Air-Cooled Heat Exchanger

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.354-355.153 ◽

2011 ◽

Vol 354-355 ◽

pp. 153-158

Author(s):

Xiao Qing Huang ◽

Xu Zhang ◽

Chun Guang Li

Keyword(s):

Heat Transfer ◽

Reynolds Number ◽

Heat Exchanger ◽

Experimental Research ◽

Convection Heat Transfer ◽

Hot Water ◽

Water Side ◽

Coefficient Corrélation ◽

Air Cooled Heat Exchanger ◽

Transfer Properties

Experimental research on resistance and heat transfer properties of corrugated plate air-cooled heat exchanger under the condition of variable air and hot water flow rates has been conducted. The pressure drop and convection heat transfer coefficient correlation expressions both the air side and hot water side are acquired, where the Reynolds number for air side ranges from 401 to 6602 and the Reynolds number for water side ranges from 2536 to 19301 are adaptable.

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