Drawn Polymer Fiber Recuperative Heat Exchangers
Name
Adams-jacoba-sm-nse-2021-thesis.pdf
Description
Thesis PDF
Size
9.23 MB
Format
Adobe PDF
Checksum (MD5)
fbadeed6be1df7792d9c94595701c234
Author(s)
Adams, Jacob
Advisor(s)
Brisson, John
Date Issued
September 2021
Publisher
Massachusetts Institute of Technology
Abstract
Polymer microchannel heat exchangers for use in cryocooler applications have been developed. These heat exchangers are manufactured using a thermal drawing process where a bulk polymer preform is heated and stretched. The process results in channels with a characteristic dimension of 50-100 µm and with an overall length of many meters. The drawn heat exchangers are lightweight, flexible, and have a large surface-area-to-volume ratio. Initial tests on a Joule-Thomson cryocooler with a heat exchanger of overall dimension of 2.5mm x 2.5mm x 400mm with nitrogen as a working fluid were performed. Nitrogen was successfully liquefied with a mass flow rate of 34 mg/s and cooling power of 200 mW at 80 K.
MIT Department
Massachusetts Institute of Technology. Department of Nuclear Science and Engineering
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