Numerical modeling of compact high temperature heat exchanger and chemical decomposer for hydrogen production |
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| Authors: | Valery Ponyavin Yitung Chen Anthony E Hechanova Merrill Wilson |
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| Institution: | (1) Department of Mechanical Engineering, University of Nevada, 4505 Maryland Parkway, Box 454027, Las Vegas, NV 89154-4027, USA;(2) Harry Reid Center for Environmental Studies, University of Nevada, Las Vegas, 89154, USA;(3) Ceramatec Inc, Salt Lake City, 84119, USA |
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| Abstract: | The present study addresses fluid flow and heat transfer in a high temperature compact heat exchanger which will be used as
a chemical decomposer in a hydrogen production plant. The heat exchanger is manufactured using fused ceramic layers that allow
creation of channels with dimensions below 1 mm. The main purpose of this study is to increase the thermal performance of
the heat exchanger, which can help to increase the sulfuric acid decomposition rate. Effects of various channel geometries
of the heat exchanger on the pressure drop are studied as well. A three-dimensional computational model is developed for the
investigation of fluid flow and heat transfer in the heat exchanger. Several different geometries of the heat exchanger channels,
such as straight channels, ribbed ground channels, hexagonal channels, and diamond-shaped channels are examined. Based on
the results, methods on how to improve the design of the heat exchanger are recommended. |
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