performance analysis and comparison between aluminum and graphite foam heat exchangers

An experimental investigation on effect of pores per inch in compact heat exchanger with aluminum foam

Comparison of performance between the porous fins and the conventional louvered fins was provided. In the investigation, six types of foam were considered with varying porosity (0.890.96) and varying the pores per inch, PPI, (1040).

Advanced Heat Exchangers for Dry Cooling Systems,

Typically, heat exchanger cores must increase in size to more effectively dissipate increased heat loads, this would be impossible in many cases, thus improved heat exchanger cores will be required. In this Phase I investigation, MRi aimed to demonstrate improved thermal management using graphite foam (Gr-foam) core heat exchangers.

Thermal diffusivity

In heat transfer analysis, thermal diffusivity is the thermal conductivity divided by density and specific heat capacity at constant pressure. It measures the rate of transfer of heat of a material from the hot end to the cold end. It has the SI derived unit of m 2 /s.

Heat Transfer in Metal Foam Heat Exchangers at High Temperature

ii Heat Transfer in Metal Foam Heat Exchangers at High Temperature Pakeeza Hafeez Doctor of Philosophy Mechanical and Industrial Engineering Department University of Toronto 2016 Abstract Heat transfer though open-cell metal foam is experimentally

CHARACTERISATION OF HEAT TRANSFER IN HIGH THERMAL CONDUCTIVITY GRAPHITE FOAM

HEFAT2007 5th International Conference on Heat Transfer, Fluid Mechanics and Thermodynamics Sun City, South Africa Paper number: LK2 CHARACTERISATION OF HEAT TRANSFER IN HIGH THERMAL CONDUCTIVITY GRAPHITE FOAM Leong K.C.*, Jin L.W., Chai J.C.

A performance analysis of porous graphite foam heat

A performance analysis of porous graphite foam heat exchangers in vehicles Lin, Wamei LU; Sundn, Bengt LU and Yuan, Jinliang LU () In Applied Thermal Engineering 50 (1). p.1201-1210 Mark Abstract Due to the increasing cooling power and space limitation in

Florida State University Libraries

Florida State University Libraries Electronic Theses, Treatises and Dissertations The Graduate School 2013 Parametric Study of Graphite Foam Fins and Application in Heat Exchangers Michael Collins Follow this and additional works at the FSU Digital Library.

Graphite Foam as a Cryogenic Heat Exchanger

1 Graphite Foam as a Cryogenic Heat Exchanger N.J. Keltner, T.I. Mulcahey, S.M. Ghiaasiaan Georgia Tech Cryo Lab, Georgia Institute of Technology Atlanta, GA 30332 ABSTRACT Metal foams have recently been studied in a variety of heat transfer applications

Thermal

article{osti_1352799, title = {Thermal-hydraulic performance of metal foam heat exchangers under dry operating conditions}, author = {Nawaz, Kashif and Bock, Jessica and Jacobi, Anthony M.}, abstractNote = {High porosity metal foams with novel thermal, mechanical, electrical, and acoustic properties are being more widely adopted for application.

Analysis of a Graphene/Ultrathin Graphite Heat

A numerical comparison of aluminium and graphene-based plate-fin heat exchangers is conducted. Performance of Graphite Foam Evaporator for Use in Thermal Management J. Electron. Packag (June,2005) The Experimental Exploration of Embedding Phase

Advanced Heat Exchangers for Dry Cooling Systems,

Typically, heat exchanger cores must increase in size to more effectively dissipate increased heat loads, this would be impossible in many cases, thus improved heat exchanger cores will be required. In this Phase I investigation, MRi aimed to demonstrate improved thermal management using graphite foam (Gr-foam) core heat exchangers.

Heat Exchanger Design Handbook

2017/4/10Book Description Completely revised and updated to reflect current advances in heat exchanger technology, Heat Exchanger Design Handbook, Second Edition includes enhanced figures and thermal effectiveness charts, tables, new chapter, and additional topics––all while keeping the qualities that made the first edition a centerpiece of information for practicing engineers, research,

Hawaii Energy and Environmental Technologies (HEET) Initiative

8 xTesting of the Lockheed Martin Graphite Foam Heat Exchanger showed that it didn't have the anticipated improvement in performance compared to the plain shell and tube xTesting confirmed that the Lockheed Martin Enhanced Tube Condenser has a significant

Performance Analysis and Comparison between Aluminum

Performance Analysis and Comparison between Aluminum and Graphite Foam Heat Exchangers under Countercurrent Flow Conditions Lin, Wamei LU; Yuan, Jinliang LU and Sundn, Bengt LU () 2011 International Workshop on Heat Transfer Advances for Mark

A Review of Graphite Foam as Thermal Material

graphite foam heat exchangers. But in the current heat exchanger or heat sink commercial market, aluminum and copper are still the preferred thermal material. In this case, there are still some problems blocking the development of graphite foam heatmarket.

Plate Heat Exchangers Using Natural Graphite Sheets

Plate Heat Exchangers Using Natural Graphite Sheets by Pouya Jamzad B.Sc., Sharif University of Technology, 2015 Thesis Submitted in Partial Fulfillment of the Requirements for the Degree of Master of Applied Science in the School of Mechatronics System

High porosity and light weight graphene foam heat sink

2020/7/23When nickel foam was added as the heat sink, it was found that the sintered pure nickel foam exhibited an even worse thermal cooling than the heater without a heat sink. While the temperatures at low powers (i.e. 0.24 W and 0.35 W) were comparable to the temperatures of only heater, those of 0.64 W and 1 W were 4 degrees and 6 degrees higher, respectively.

Impact of Surface Treatment and Geometrical Characteristics on

foam heat exchanger are better than that of the fin-tube heat exchanger [23]. Although there are multiple studies on the evaluation of the performance of metal foams heat sinks and heat exchangers under dry operating conditions., there is rare information available about the performance when

Performance of Aluminum and Carbon Foams for Air

The air side heat transfer performance of three aluminum foam samples and three modified carbon foam samples are examined for comparison with multilouvered fins often found in compact heat exchangers. The aluminum foam samples have a bulk density of 216 kg / m 3 with pore sizes of 0.5, 1, and 2 mm. with pore sizes of 0.5, 1, and 2 mm.

Figure 4 from Forced convection air cooling in porous

Fig. 4 Tested graphite foam heat sinks of (a) block, (b) stagger, (c) baffle and (d) zigzag configurations. - Forced convection air cooling in porous graphite foam for thermal management applications DOI: 10.1109/ITHERM.2008.4544254 Corpus ID: 35280181 Forced

Air

Originally, heat exchangers used aluminum plates. Problems occurred with corrosion in the damp environment, created by condensation, and poor sound characteristics. Plastics solved the corrosion and some sound problems, but the conductivity did not equal that of the aluminum and the cost was higher.

Air

Originally, heat exchangers used aluminum plates. Problems occurred with corrosion in the damp environment, created by condensation, and poor sound characteristics. Plastics solved the corrosion and some sound problems, but the conductivity did not equal that of the aluminum and the cost was higher.

THERMAL MANAGEMENT SOLUTIONS UTILIZING HIGH THERMAL CONDUCTIVITY GRAPHITE

thin foam sink weighed only 4 grams (compared to 44 for the aluminum heat sink). In a final test (see Figure 6), another finned foam heat sink was machined and installed on a Pentium 133 processor in an operational computer (the image analysis system used in this

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