The evolutionary design of condensers
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© 2015 AIP Publishing LLC. Condensers are flow architectures needed to provide high rates of condensation (or cooling) per unit volume, in enclosures with fixed volume. Their design has not changed from configurations consisting of the banks of horizontal tubes. In this paper, we outline a free path to evolving the design by exploring new features of flow configuration: flattened tubes, multiple tube sizes, arrays of flattened tubes, vertical tubes with turbulent film flow, forced convection condensation instead of gravity driven condensation, and the optimal length of a horizontal tube, i.e., the number of tubes in a column aligned with vapor cross flow. We show that the condensation density can be increased sizably by varying freely and without bias the morphology of the flow system: the shapes and arrangement of the cooled surfaces on which condensation occurs. The evolution of technology is described in terms of the special time direction of the useful (purposeful) changes in the configuration (shapes, arrangements) of surfaces on which flow/condensation occurs. This explains what "evolution" means. It is an important step for physics, not just technology.
Published Version (Please cite this version)10.1063/1.4915505
Publication InfoBejan, Adrian; Kim, Y; Lee, J; & Lorente, S (2015). The evolutionary design of condensers. Journal of Applied Physics, 117(12). 10.1063/1.4915505. Retrieved from https://hdl.handle.net/10161/15210.
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J.A. Jones Professor of Mechanical Engineering
Professor Bejan's research covers engineering science and applied physics: thermodynamics, heat transfer, convection, design, and evolution in nature. Professor Bejan was ranked in 2001 among the 100 most highly cited authors worldwide in engineering (all fields, all countries), the Institute for Scientific Information. Professor Bejan has received 18 honorary doctorates from universities in 11 countries. Adrian Bejan is the author of 30 books and over 650 peer-referred
Adjunct Professor in the Department of Mechanical Engineering and Materials Science
Lorente's research interests encompass vascularized materials, constructal theory, porous media, fluid mechanics, heat and mass transfer.
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