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Seasonal COP of an Air-to-Water Heat Pump when Using Predictive Control Preferring Power Production from Renewable Sources in the Czech Republic

Author

Listed:
  • Jiří Pospíšil

    (Energy Institute, NETME Centre, Brno University of Technology, Technicka 2896/2, 61669 Brno, Czech Republic)

  • Michal Špiláček

    (Energy Institute, NETME Centre, Brno University of Technology, Technicka 2896/2, 61669 Brno, Czech Republic)

  • Pavel Charvát

    (Energy Institute, NETME Centre, Brno University of Technology, Technicka 2896/2, 61669 Brno, Czech Republic)

Abstract

The paper presents a parametric study evaluating the effects of various predictive controls on the operating parameters of heat pumps. The heat pump represents a significant power appliance in the residential sector. Its connection to the heat accumulator creates a system with considerable potential to control electricity consumption according to the needs of the electricity grid. The air-water heat pump is considered in this study. A predictive control is used for priority operation of the heat pump at periods of peak power production from renewable sources. The following were tested as the parameters of predictive control: outdoor air temperature, photovoltaic power production and wind power production. The combination of photovoltaic and wind power production was also tested. A parametric analysis considering different sizes for the thermal accumulator and the heating capacity of the heat pump were proposed. The benefits of predictive control are evaluated based on historical records of meteorological data from 2015 to 2018 in the city of Brno, Czech Republic. The data on the historical development of the real electrical energy production from renewable sources in the Czech Republic are used for regulation control in a monitored period. The main comparison parameter is the heat pump seasonal coefficient of performance (SCOP). From the carried out study results, an increase in SCOP by 14% was identified for priority operation of heat pump (HP) at periods with highest outdoor air temperature. Priority operation of HP at periods with peak photovoltaic (PV) production increased SCOP by 10.25%. A decrease in SCOP only occurred in case with priority operation of HP at peak production of wind power plants. Increasing the size of the accumulator contributes to an increase in SCOP in all assessed modifications of predictive control.

Suggested Citation

  • Jiří Pospíšil & Michal Špiláček & Pavel Charvát, 2019. "Seasonal COP of an Air-to-Water Heat Pump when Using Predictive Control Preferring Power Production from Renewable Sources in the Czech Republic," Energies, MDPI, vol. 12(17), pages 1-13, August.
    • Handle: RePEc:gam:jeners:v:12:y:2019:i:17:p:3236-:d:259942
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    References listed on IDEAS

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    1. Hepbasli, Arif & Kalinci, Yildiz, 2009. "A review of heat pump water heating systems," Renewable and Sustainable Energy Reviews, Elsevier, vol. 13(6-7), pages 1211-1229, August.
    2. Chua, K.J. & Chou, S.K. & Yang, W.M., 2010. "Advances in heat pump systems: A review," Applied Energy, Elsevier, vol. 87(12), pages 3611-3624, December.
    3. Pospíšil, Jiří & Špiláček, Michal & Kudela, Libor, 2018. "Potential of predictive control for improvement of seasonal coefficient of performance of air source heat pump in Central European climate zone," Energy, Elsevier, vol. 154(C), pages 415-423.
    4. Guo, Xiaofeng & Goumba, Alain Pascal, 2018. "Air source heat pump for domestic hot water supply: Performance comparison between individual and building scale installations," Energy, Elsevier, vol. 164(C), pages 794-802.
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