Computer program for cryogenic piping systems

Li Zhang, Kau Fui V. Wong

Research output: Contribution to journalConference articlepeer-review


A computer program has been developed to evaluate piping systems in which cryogens are used as the fluid medium. It covers general piping systems (series, parallel, and series-parallel network) with typical cryogens (hydrogen, helium, nitrogen, oxygen, argon, and methane) in the temperature range from 2 K to 400 K and the pressure range from 0 bar to 1,200 bar. With data on thermodynamic and transport properties of cryogens, the calculated results show a significant difference between using constant cryogenic properties and updated cryogenic properties. This program is probably the first of its kind in the public domain that accounts for variable cryogenic properties. It indicates that for some cryogens, such as hydrogen, helium, and argon, using constant fluid properties in piping system calculations will create non-negligible errors in the results of pressure drop, flow rate, and pipe diameter. This program advises when constant cryogenic properties are adequate and when their variability must be taken into account. This program, which could update cryogenic properties, is recommended for the calculation and design of cryogenic piping systems.

Original languageEnglish (US)
Pages (from-to)295-299
Number of pages5
JournalASHRAE Transactions
Issue number2
StatePublished - Dec 1 1994
EventProceedings of the ASHRAE Annual Meeting - Orlando, FL, USA
Duration: Jun 25 1994Jun 29 1994

ASJC Scopus subject areas

  • Building and Construction
  • Mechanical Engineering


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