Numerical investigation of real gas effects on a two-stage pulse tube cryocooler performance
| Autor: | Ali Jafarian, Amin Kardgar, M. Rezaei |
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| Rok vydání: | 2017 |
| Předmět: |
Physics
Equation of state Real gas business.industry 020209 energy Mechanical Engineering chemistry.chemical_element Thermodynamics 02 engineering and technology Building and Construction Mechanics Cryocooler Computational fluid dynamics 01 natural sciences Control volume Ideal gas chemistry 0103 physical sciences 0202 electrical engineering electronic engineering information engineering 010306 general physics business Pulse tube refrigerator Astrophysics::Galaxy Astrophysics Helium |
| Zdroj: | International Journal of Refrigeration. 82:106-118 |
| ISSN: | 0140-7007 |
| DOI: | 10.1016/j.ijrefrig.2017.06.008 |
| Popis: | In this paper, a one-dimensional CFD code was developed to simulate a two-stage pulse tube cryocooler. The aim is to investigate the effects of real gas on cryocooler performance. Conservation equations were derived based on real gas equations of state in general form and then were discretized with control volume approach. Results based on four distinct equations of state including ideal gas, Van der Waals, Virial and Helium gas were compared. Results showed that at the first and second stage mean pressures of 25 and 12.5 bar, and the minimum no load attainable temperatures of almost 60 and 18 K, employing Helium equation of state, the deviation of almost 6.5 and 2.5% relative to ideal gas equation of state was observed respectively. Meanwhile the ideal gas equation of state was fairly accurate and could be proposed to reduce the calculation cost. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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