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Influence of control strategy on seasonal coefficient of performance for a heat pump with low-temperature heat storage in the geographical conditions of Central Europe

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  • Kudela, Libor
  • Špiláček, Michal
  • Pospíšil, Jiří

Abstract

This paper presents a computational parametric study on increasing the Seasonal Coefficient of Performance (SCOP) for residential heat pumps. The studied system consists of a heat pump, low-temperature heat storage, and a control unit. The heat pump enables selection of a low-temperature heat source between ambient air and water in a tank. Two variants of low-temperature heat storage are tested, particularly, insulated-water heat storage and water heat storage sunken in soil. The study is further complemented with a test of selected algorithms for heat pump control: equithermal regulation, a binary algorithm for temperature source selection, a predictive algorithm for the heat storage discharging, and an algorithm for deferred heat storage discharging. A computational model of the system is made using Python. The assessment of HP operation is made based on meteorological data from the years 2008–2019 recorded in the city of Brno, Czech Republic, Central Europe. The results obtained show that using the approaches tested has the potential for increasing the SCOP. This increase reaches as much as 5.19% and it requires only a simple software change in the heat pump control algorithm and connection to meteorological data prediction.

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  • Kudela, Libor & Špiláček, Michal & Pospíšil, Jiří, 2021. "Influence of control strategy on seasonal coefficient of performance for a heat pump with low-temperature heat storage in the geographical conditions of Central Europe," Energy, Elsevier, vol. 234(C).
    • Handle: RePEc:eee:energy:v:234:y:2021:i:c:s0360544221015243
    DOI: 10.1016/j.energy.2021.121276
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    References listed on IDEAS

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    1. Shichen Gao & Changfu Tang & Wanjing Luo & Jiaqiang Han & Bailu Teng, 2020. "A New Analytical Model for Calculating Transient Temperature Response of Vertical Ground Heat Exchangers with a Single U-Shaped Tube," Energies, MDPI, vol. 13(8), pages 1-12, April.
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    1. Jaime Sieres & Ignacio Ortega & Fernando Cerdeira & Estrella Álvarez & José M. Santos, 2022. "Seasonal Efficiency of a Brine-to-Water Heat Pump with Different Control Options according to Ecodesign Standards," Clean Technol., MDPI, vol. 4(2), pages 1-13, June.
    2. Li, Yufan & Bi, Yuehong & Lin, Yashan & Wang, Hongyan & Sun, Ruirui, 2023. "Analysis of the soil heat balance of a solar-ground source absorption heat pump with the soil-based energy storage in the transition season," Energy, Elsevier, vol. 264(C).

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