Article | Proceedings of the 13th International Modelica Conference, Regensburg, Germany, March 4–6, 2019 | Coupled Simulation of a Room Air-conditioner with CFD Models for Indoor Environment Linköping University Electronic Press Conference Proceedings
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Title:
Coupled Simulation of a Room Air-conditioner with CFD Models for Indoor Environment
Author:
Hongtao Qiao: Mitsubishi Electric Research Laboratories, USA Xu Han: University of Colorado Boulder, USA Saleh Nabi: Mitsubishi Electric Research Laboratories, USA Christopher R. Laughman: Mitsubishi Electric Research Laboratories, USA
DOI:
10.3384/ecp19157265
Download:
Full text (pdf)
Year:
2019
Conference:
Proceedings of the 13th International Modelica Conference, Regensburg, Germany, March 4–6, 2019
Issue:
157
Article no.:
028
Pages:
10
No. of pages:
265-274
Publication type:
Abstract and Fulltext
Published:
2019-02-01
ISBN:
978-91-7685-122-7
Series:
Linköping Electronic Conference Proceedings
ISSN (print):
1650-3686
ISSN (online):
1650-3740
Publisher:
Linköping University Electronic Press, Linköpings universitet


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Coupled simulation of building energy systems (BES) and computation fluid dynamics (CFD) often focuses on the integration of air handlers with indoor environment, and does not incorporate vapor compression systems into the analysis, yielding inaccurate prediction of building energy consumption. This paper presents a coupled simulation to explore the pull-down performance of a room air conditioning system. The dynamic models of the air-conditioner are constructed in Modelica, whereas the indoor environment is simulated in OpenFOAM. Dynamic characteristics will be compared with different vane angles and airflow modes. Numerical simulations demonstrate that both vane angle and airflow mode exhibit pronounced impact on the pull-down time. Meanwhile, the well-mixed assumption that most of building energy simulation programs are built upon exhibits drastically different dynamic characteristics compared to the detailed CFD model, suggesting that neglecting non-uniform air flow and temperature distributions in buildings might lead to significant errors in control design.

Keywords: Modelica, OpenFOAM, co-simulation, building energy simulation, vapor compression system

Proceedings of the 13th International Modelica Conference, Regensburg, Germany, March 4–6, 2019

Author:
Hongtao Qiao, Xu Han, Saleh Nabi, Christopher R. Laughman
Title:
Coupled Simulation of a Room Air-conditioner with CFD Models for Indoor Environment
DOI:
http://dx.doi.org/10.3384/ecp19157265
References:
No references available

Proceedings of the 13th International Modelica Conference, Regensburg, Germany, March 4–6, 2019

Author:
Hongtao Qiao, Xu Han, Saleh Nabi, Christopher R. Laughman
Title:
Coupled Simulation of a Room Air-conditioner with CFD Models for Indoor Environment
DOI:
https://doi.org10.3384/ecp19157265
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Last updated: 2019-06-04