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Microchannel heat exchangers use channel widths of 10 to 1,000 µm. By constraining the flow to such narrow channels, thermal diffusion lengths are short, and the characteristic heat transfer coefficients are very high. Since the thermal performance is so strong, relatively short flow passages are required, and with many flow passages in parallel in a small device, the pressure drop can be small as well. These are important factors in the design of heat exchangers.
We have developed several specific techniques for the design of microchannel heat exchangers. One of our tools is a suite of models for heat transfer and pressure drop based on first principle analyses and published empirical correlations. Variables used in the heat exchanger design include the channel height, width and length, the wall thickness, and the materials used for construction. Furthermore, our extensive experience in building and testing microchannel heat exchangers to guides our designs. For example, our knowledge in the use of the lamination fabrication process also guides the mechanical design of our heat exchangers. Finally, we know how to extend these results with analyses of header flow distribution to ensure uniform flow.
Microchannel heat exchangers are integral parts of many of the thermal and chemical systems. We have capabilities and experience in heat exchanger designs for these types of applications:
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