Article | Proceedings of the 13th International Modelica Conference, Regensburg, Germany, March 4–6, 2019 | Real-time optimization of intermediate temperature for a cascade heat pump via extreme seeking Linköping University Electronic Press Conference Proceedings
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Title:
Real-time optimization of intermediate temperature for a cascade heat pump via extreme seeking
Author:
Wenyi Wang: Department of Mechanical Engineering, University of Texas at Dallas, Richardson, TX 75080, U.S.A. Yaoyu Li: Department of Mechanical Engineering, University of Texas at Dallas, Richardson, TX 75080, U.S.A.
DOI:
10.3384/ecp19157251
Download:
Full text (pdf)
Year:
2019
Conference:
Proceedings of the 13th International Modelica Conference, Regensburg, Germany, March 4–6, 2019
Issue:
157
Article no.:
026
Pages:
8
No. of pages:
251-258
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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Improving the energy efficiency of air-source heat pump (ASHP) has been a critical issue for heating operation in cold climates. The cascade heat pump system has been developed as a more advantageous solution over the single-stage heat pump. However, the increased complexity of cascade heat pump systems has presented great challenge for online optimization for the energy efficiency, as model based control/optimization methods incur costly modeling and calibration under different operation and equipment conditions. We propose to use the extremum seeking control as a modelfree real-time optimization strategy for efficient operation of cascaded heat pump. The intermediate temperature setpoint is used as the manipulated input for maximizing the system efficiency while satisfying the heating load demand. A Modelica model of an R134a/410a cascade heat pump is developed, and control simulations are conducted for validating the system performance under different ambient conditions.

Keywords: Cascade heat pump, intermediate temperature, extremum seeking control, real-time optimization, Modelica

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

Author:
Wenyi Wang, Yaoyu Li
Title:
Real-time optimization of intermediate temperature for a cascade heat pump via extreme seeking
DOI:
http://dx.doi.org/10.3384/ecp19157251
References:
No references available

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

Author:
Wenyi Wang, Yaoyu Li
Title:
Real-time optimization of intermediate temperature for a cascade heat pump via extreme seeking
DOI:
https://doi.org10.3384/ecp19157251
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Last updated: 2019-11-06