Analytical optimization of heat exchanger dimensions of a joule-thomson microcooler

Adhika Widyaparaga, Masashi Kuwamoto, Eiji Noda, Naoya Sakoda, Masamichi Kohno, Yasuyuki Takata

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

In designing a Joule-Thomson microcooler, aiming for a compact size yet maintaining good performance, it is important to find the optimum dimensions of its heat exchanger. We have developed a model capable of predicting the performance characteristics of a wiretype Joule-Thomson microcooler utilizing analytical methods and incorporating changing gas properties via gas equations of state. The model combined the heat exchanger and the JT expander, thus requiring only the inlet gas properties as input. The model results were compared to experimental measurements using C2H4 and N2O as coolant gases. Predicted mass flow rate and temperature drop were in good agreement with the measured values. The long capillary length present in the tested microcooler was revealed to maintain performance of the microcooler for longer heat exchanger lengths due to it functioning as a secondary heat exchanger. Using the calculation results it was possible to correctly estimate the optimum heat exchanger length for C2H 4 and for N2O.

Original languageEnglish
Title of host publicationASME 2011 9th International Conference on Nanochannels, Microchannels, and Minichannels, ICNMM 2011
Pages203-207
Number of pages5
DOIs
Publication statusPublished - Dec 1 2011
EventASME 2011 9th International Conference on Nanochannels, Microchannels, and Minichannels, ICNMM 2011 - Edmonton, AB, Canada
Duration: Jun 19 2011Jun 22 2011

Publication series

NameASME 2011 9th International Conference on Nanochannels, Microchannels, and Minichannels, ICNMM 2011
Volume2

Other

OtherASME 2011 9th International Conference on Nanochannels, Microchannels, and Minichannels, ICNMM 2011
CountryCanada
CityEdmonton, AB
Period6/19/116/22/11

All Science Journal Classification (ASJC) codes

  • Process Chemistry and Technology

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  • Cite this

    Widyaparaga, A., Kuwamoto, M., Noda, E., Sakoda, N., Kohno, M., & Takata, Y. (2011). Analytical optimization of heat exchanger dimensions of a joule-thomson microcooler. In ASME 2011 9th International Conference on Nanochannels, Microchannels, and Minichannels, ICNMM 2011 (pp. 203-207). (ASME 2011 9th International Conference on Nanochannels, Microchannels, and Minichannels, ICNMM 2011; Vol. 2). https://doi.org/10.1115/ICNMM2011-58205