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Modeling an Alternate Operational Ground Source Heat Pump for Combined Space Heating and Domestic Hot Water Power Sizing

Author

Listed:
  • Kaiser Ahmed

    (Department of Civil Engineering, Aalto University, 02150 Espoo, Finland)

  • Jevgeni Fadejev

    (Department of Civil Engineering and Architecture, Tallinn University of Technology, 19086 Tallinn, Estonia)

  • Jarek Kurnitski

    (Department of Civil Engineering, Aalto University, 02150 Espoo, Finland
    Department of Civil Engineering and Architecture, Tallinn University of Technology, 19086 Tallinn, Estonia)

Abstract

This study developed an alternate operational control system for ground source heat pumps (GSHP), which was applied to determine combined space heating and domestic hot water (DHW) power equations at design temperature. A domestic GSHP with an alternate control system was implemented in a whole building simulation model following the heat deficiency for space heating based on degree minute counting. A simulated GSHP system with 200 L storage tank resulted in 13%–26% power reduction compared to the calculation of the same system with existing European standards, which required separate space heating and DHW power calculation. The periodic operation utilized the thermal mass of the building with the same effect in the case of light and heavy-weight building because of the very short cycle of 30 min. Room temperatures dropped during the DHW heating cycle but kept within comfort range. The developed equations predict the total power as a function of occupancy, peak and average DHW consumption with variations of 0%–2.2% compared to the simulated results. DHW heating added the total power in modern low energy buildings by 21%–41% and 13%–26% at design temperatures of −15 °C and −26 °C, respectively. Internal heat gains reduced the power so that the reduction effect compensated the effect of DHW heating in the case of a house occupied by three people. The equations could be used for power sizing of any heat pump types, which has alternate operation principle and hydronic heating system.

Suggested Citation

  • Kaiser Ahmed & Jevgeni Fadejev & Jarek Kurnitski, 2019. "Modeling an Alternate Operational Ground Source Heat Pump for Combined Space Heating and Domestic Hot Water Power Sizing," Energies, MDPI, vol. 12(11), pages 1-26, June.
    • Handle: RePEc:gam:jeners:v:12:y:2019:i:11:p:2120-:d:236727
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    References listed on IDEAS

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    1. Hervas-Blasco, Estefanía & Pitarch, Miquel & Navarro-Peris, Emilio & Corberán, José M., 2017. "Optimal sizing of a heat pump booster for sanitary hot water production to maximize benefit for the substitution of gas boilers," Energy, Elsevier, vol. 127(C), pages 558-570.
    2. Rodríguez-Hidalgo, M.C. & Rodríguez-Aumente, P.A. & Lecuona, A. & Legrand, M. & Ventas, R., 2012. "Domestic hot water consumption vs. solar thermal energy storage: The optimum size of the storage tank," Applied Energy, Elsevier, vol. 97(C), pages 897-906.
    3. Jukka Yrjölä & Eetu Laaksonen, 2015. "Domestic Hot Water Production with Ground Source Heat Pump in Apartment Buildings," Energies, MDPI, vol. 8(8), pages 1-20, August.
    4. Li, Huai & Xu, Wei & Yu, Zhen & Wu, Jianlin & Sun, Zhifeng, 2017. "Application analyze of a ground source heat pump system in a nearly zero energy building in China," Energy, Elsevier, vol. 125(C), pages 140-151.
    5. Wessam El-Baz & Peter Tzscheutschler & Ulrich Wagner, 2018. "Experimental Study and Modeling of Ground-Source Heat Pumps with Combi-Storage in Buildings," Energies, MDPI, vol. 11(5), pages 1-19, May.
    6. Matteo Rivoire & Alessandro Casasso & Bruno Piga & Rajandrea Sethi, 2018. "Assessment of Energetic, Economic and Environmental Performance of Ground-Coupled Heat Pumps," Energies, MDPI, vol. 11(8), pages 1-23, July.
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    Cited by:

    1. Paula Sankelo & Kaiser Ahmed & Alo Mikola & Jarek Kurnitski, 2022. "Renovation Results of Finnish Single-Family Renovation Subsidies: Oil Boiler Replacement with Heat Pumps," Energies, MDPI, vol. 15(20), pages 1-18, October.

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