Article | Proceedings of The American Modelica Conference 2018, October 9-10, Somberg Conference Center, Cambridge MA, USA | On Closure Relations for Dynamic Vapor Compression Cycle Models Linköping University Electronic Press Conference Proceedings
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Title:
On Closure Relations for Dynamic Vapor Compression Cycle Models
Author:
Christopher R. Laughman: Mitsubishi Electric Research Laboratories, Cambridge, MA, USA Hongtao Qiao: Mitsubishi Electric Research Laboratories, Cambridge, MA, USA
DOI:
10.3384/ecp1815467
Download:
Full text (pdf)
Year:
2018
Conference:
Proceedings of The American Modelica Conference 2018, October 9-10, Somberg Conference Center, Cambridge MA, USA
Issue:
154
Article no.:
007
Pages:
67-76
No. of pages:
10
Publication type:
Abstract and Fulltext
Published:
2019-02-26
ISBN:
978-91-7685-148-7
Series:
Linköping Electronic Conference Proceedings
ISSN (print):
1650-3686
ISSN (online):
1650-3740
Publisher:
Linköping University Electronic Press, Linköpings universitet


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Models of closure relations, or the expressions that relate the heat transfer coefficients and frictional pressure losses to other variables of the vapor-compression cycle, can have a significant impact on the performance on the overall cycle behavior. We explore three different approaches that may be used in formulating these closure models, and show that approaches that impose a nonlinear algebraic coupling can impose significant computational challenges. In comparison, models that incorporate lowpass dynamics can effectively decouple this nonlinear behavior, resulting in simulations that are faster and demonstrate more realistic and robust behavior.

Keywords: Modelica, heat pump, vapor compression cycle, approximation

Proceedings of The American Modelica Conference 2018, October 9-10, Somberg Conference Center, Cambridge MA, USA

Author:
Christopher R. Laughman, Hongtao Qiao
Title:
On Closure Relations for Dynamic Vapor Compression Cycle Models
DOI:
http://dx.doi.org/10.3384/ecp1815467
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Proceedings of The American Modelica Conference 2018, October 9-10, Somberg Conference Center, Cambridge MA, USA

Author:
Christopher R. Laughman, Hongtao Qiao
Title:
On Closure Relations for Dynamic Vapor Compression Cycle Models
DOI:
https://doi.org10.3384/ecp1815467
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