An additively manufactured metallic manifold-microchannel heat exchanger for high temperature applications

Efficiency and emissions of advanced gas turbine power cycles can be improved by incorporating high-temperature ceramic heat exchangers (see Figure 1). In cooperation with the DOE, preliminary development and testing of SiC based structures has been completed. This program has focused on four initial areas: thermo-mechanical degradation as a function of the chemical operating environments, design of a layered microchannel heat exchanger, thermo-mechanical testing and analysis of these structures, and fabrication development through rapid prototyping techniques.

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Thermal Performance of Brazed Plate Heat Exchanger in High Temperature Applications

ECS Meeting Abstracts ◽

10.1149/ma2015-03/1/48 ◽

2015 ◽

Keyword(s):

High Temperature ◽

Heat Exchanger ◽

Thermal Performance ◽

Plate Heat Exchanger ◽

Plate Heat ◽

Brazed Plate Heat Exchanger ◽

Temperature Applications

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Air-Side Heat Transfer Enhancement Utilizing Design Optimization and an Additive Manufacturing Technique

Journal of Heat Transfer ◽

10.1115/1.4035068 ◽

2016 ◽

Vol 139 (3) ◽

Cited By ~ 26

Author(s):

Martinus A. Arie ◽

Amir H. Shooshtari ◽

Veena V. Rao ◽

Serguei V. Dessiatoun ◽

Michael M. Ohadi

Keyword(s):

Heat Transfer ◽

Additive Manufacturing ◽

Heat Exchanger ◽

Heat Transfer Enhancement ◽

Coefficient Of Performance ◽

Transfer Enhancement ◽

Microchannel Heat Exchanger ◽

Complex Design ◽

Fin Thickness ◽

Manifold Microchannel

This paper focuses on the study of an innovative manifold microchannel design for air-side heat transfer enhancement that uses additive manufacturing (AM) technology. A numerical-based multi-objective optimization was performed to maximize the coefficient of performance and gravimetric heat transfer density (Q/MΔT) of air–water heat exchanger designs that incorporate either manifold-microchannel or conventional surfaces for air-side heat transfer enhancement. Performance comparisons between the manifold-microchannel and conventional heat exchangers studied under the current work show that the design based on the manifold-microchannel in conjunction with additive manufacturing promises to push the performance substantially beyond that of conventional technologies. Different scenarios based on manufacturing constraints were considered to study the effect of such constraints on the heat exchanger performance. The results clearly demonstrate that the AM-enabled complex design of the fins and manifolds can significantly improve the overall performance, based on the criteria described in this paper. Based on the current manufacturing limit, up to nearly 60% increase in gravimetric heat transfer density is possible for the manifold-microchannel heat exchanger compared to a wavy-fin heat exchanger. If the manufacturing limit (fin thickness and manifold width) can be reduced even further, an even larger improvement is possible.

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