Extension of the implicit curve-fitting method for fast calculation of thermodynamic properties of subcooled refrigerants.(Report): An article from: HVAC & R Research
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ISBN / ASINB003UKYZS0
ISBN-13978B003UKYZS9
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This digital document is an article from HVAC & R Research, published by American Society of Heating, Refrigerating, and Air-Conditioning Engineers, Inc. on September 1, 2009. The length of the article is 6349 words. The page length shown above is based on a typical 300-word page. The article is delivered in HTML format and is available immediately after purchase. You can view it with any web browser.
From the author: Researchers want refrigerant thermal property calculations to be both quick and reliable when simulating refrigeration systems. The implicit regression and explicit calculation method allows for the fast and stable calculation of refrigerant thermodynamic properties of saturated, two-phase, and superheated refrigerants. In this paper, this method was improved upon so it could be used with subcooled refrigerants. As an example, the fast calculation formulae and the developing process for subcooled R-134a and R-410A are given. A comparison with REFPROP 8 (Lemmon et al. 2007) shows that for R-134a the total mean relative deviations of the fast calculation formulae are less than 0.2% and the maximum relative deviations are less than 5.8%. For R-410A, the total mean relative deviations of the fast calculation formulae are less than 0.8% and the maximum relative deviations are less than 4.5%. The mean calculation speeds of the fast calculation formulae for R-134a and R-410A are nearly 100 times and greater than 1500 times faster than those of REFPROP 8, respectively.
Citation Details
Title: Extension of the implicit curve-fitting method for fast calculation of thermodynamic properties of subcooled refrigerants.(Report)
Author: Guoliang Ding
Publication:HVAC & R Research (Magazine/Journal)
Date: September 1, 2009
Publisher: American Society of Heating, Refrigerating, and Air-Conditioning Engineers, Inc.
Volume: 15 Issue: 5 Page: 875(14)
Article Type: Report
Distributed by Gale, a part of Cengage Learning
From the author: Researchers want refrigerant thermal property calculations to be both quick and reliable when simulating refrigeration systems. The implicit regression and explicit calculation method allows for the fast and stable calculation of refrigerant thermodynamic properties of saturated, two-phase, and superheated refrigerants. In this paper, this method was improved upon so it could be used with subcooled refrigerants. As an example, the fast calculation formulae and the developing process for subcooled R-134a and R-410A are given. A comparison with REFPROP 8 (Lemmon et al. 2007) shows that for R-134a the total mean relative deviations of the fast calculation formulae are less than 0.2% and the maximum relative deviations are less than 5.8%. For R-410A, the total mean relative deviations of the fast calculation formulae are less than 0.8% and the maximum relative deviations are less than 4.5%. The mean calculation speeds of the fast calculation formulae for R-134a and R-410A are nearly 100 times and greater than 1500 times faster than those of REFPROP 8, respectively.
Citation Details
Title: Extension of the implicit curve-fitting method for fast calculation of thermodynamic properties of subcooled refrigerants.(Report)
Author: Guoliang Ding
Publication:HVAC & R Research (Magazine/Journal)
Date: September 1, 2009
Publisher: American Society of Heating, Refrigerating, and Air-Conditioning Engineers, Inc.
Volume: 15 Issue: 5 Page: 875(14)
Article Type: Report
Distributed by Gale, a part of Cengage Learning
