Miniaturized Air-to-Refrigerant Heat Exchangers

Radermacher, Reinhard; Bacellar, Daniel; Aute, Vikrant; Huang, Zhiwei; Hwang, Yunho; Ling, Jiazhen; Muehlbauer, Jan; Tancabel, James; Abdelaziz, Omar; Zhang, Mingkan; Wieland,; Tool, Burr Oak

doi:10.2172/1358252

Cited by 2 publications

(3 citation statements)

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“…Wire diameters can range from 100 µm to 1 mm. The outer diameter of the tubes can be significantly less than 2 mm and with small wall thicknesses (in the range of 100 µm) while providing high-pressure resistance [16].…”

Section: Geometric Parametersmentioning

confidence: 99%

“…Wire diameters d 1 can range from 100 µm to 1 mm. The outer diameter d 2 of the tubes can be significantly less than 2 mm and with small wall thicknesses (in the range of 100 µm) while providing high-pressure resistance [16]. In Figure 2b, denotes the entire length of the wire within the periodic section and is composed of a curved part attached to the tube and a straight section .…”

Section: Geometric Parametersmentioning

confidence: 99%

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Heat Transfer through Wire Cloth Micro Heat Exchanger

et al. 2020

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The main objective of this study is to calculate and determine design parameters for a novel wire cloth micro heat exchanger. Wire cloth micro heat exchangers offer a range of promising applications in the chemical industry, plastics technology, the recycling industry and energy technology. We derived correlations to calculate the heat transfer rate, pressure drop and temperature distributions through the woven structure in order to design wire cloth heat exchangers for different applications. Computational Fluid Dynamics (CFD) simulations have been carried out to determine correlations for the dimensionless Euler and Nusselt numbers. Based on these correlations, we have developed a simplified model in which the correlations can be used to calculate temperature distributions and heat exchanger performance. This allows a wire cloth micro heat exchanger to be virtually designed for different applications.

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Section: Geometric Parametersmentioning

confidence: 99%

Section: Geometric Parametersmentioning

confidence: 99%

Heat Transfer through Wire Cloth Micro Heat Exchanger

et al. 2020

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“…The large-scale wire cloth is thereafter cut to size. The micro tubes can be manufactured with diameters well below 2 mm [17] and wall thicknesses below 100 µm. The resulting geometry provides small volume specific masses and high volume specific surface areas on both fluid sides.…”

Section: Introductionmentioning

confidence: 99%

Performance Evaluation of Wire Cloth Micro Heat Exchangers

Fugmann

Martens

Balzer³

et al. 2020

Energies

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The purpose of this study is to validate a thermal-hydraulic simulation model for a new type of heat exchanger for mass, volume, and coolant/refrigerant charge reduction. The new heat exchanger consists of tubes with diameters in the range of 1 m m and wires in the range of 100 m , woven together to form a 200 × 200 × 80 m m 3 wire cloth heat exchanger. Performance of the heat exchanger has been experimentally evaluated using water as inner and air as outer heat transfer medium. A computational thermal and fluid dynamic model has been implemented in OpenFOAM®. The model allows variation of geometry and operating conditions. The validation of the model is based on one single geometry with an opaque fabric and air-side velocities between 1 and 7 m / s . The simulated and measured pressure drops are found to be in good agreement with a relative difference of less than 16%. For the investigated cases, the effective heat transfer coefficients are in very good agreement (less than 5%) when adapting the contact resistance between tubes and wires. The numerical model describes the fluid flow and heat transfer of the tested heat exchanger with adequate precision and can be used for future wire cloth heat exchanger dimensioning for a variety of applications.

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Miniaturized Air-to-Refrigerant Heat Exchangers

Cited by 2 publications

References 0 publications

Heat Transfer through Wire Cloth Micro Heat Exchanger

Heat Transfer through Wire Cloth Micro Heat Exchanger

Performance Evaluation of Wire Cloth Micro Heat Exchangers

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