How to design a cryogenic Joule-Thomson cooling system: case study of small hydrogen lique er

  • سال انتشار: 1395
  • محل انتشار: فصلنامه هیدروژن و پیل سوختی ایران، دوره: 3، شماره: 2
  • کد COI اختصاصی: JR_IJHFC-3-2_003
  • زبان مقاله: انگلیسی
  • تعداد مشاهده: 355
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نویسندگان

Ali Saberimoghaddam

Department of Chemistry and Chemical Engineering, Faculty of Chemical Engineering, Malek Ashtar University of Technology (MUT), Lavizan, Tehran, Iran

Mohammad Mahdi Bahri Rasht Abadi

Department of Chemistry and Chemical Engineering, Faculty of Chemical Engineering, Malek Ashtar University of Technology (MUT), Lavizan, Tehran, Iran

چکیده

Heat exchangers are the critical components of refrigeration and liquefaction processes. Selection of appropriate operational conditions for the cryogenic recuperative heat exchanger and expansion valve operating in a Joule-Thomsoncooling system results in improving the performance and ef ciency. In the current study, a straightforward procedure is introduced to design an ef cient Joule- Thomson cooling system. Determining the appropriate operational conditions and con guration of streams within the recuperative heat exchanger are discussed comprehensively. A Joule-Thomson cooling system including a helically coiled tube in the tube heat exchanger and expansion valve was considered as a case study. Simulation was performed by a procedure different from the conventional  nite element method and the results were validated versus data obtained from a small laboratory hydrogen lique er. In accordance with mathematical modeling performed on the recuperative heat exchanger, it is better to  ow low pressure hydrogen inside the inner tube and high pressure hydrogen within the annulus. This arrangement results in needing shorter length heat exchanger tubes as compared with the reverse arrangement.

کلیدواژه ها

Refrigeration,Joule-Thomson,Hydrogen liquefaction,Heat exchanger,,Design and simulation

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