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Experimental Study and Modeling of Ground-Source Heat Pumps with Combi-Storage in Buildings

Author

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  • Wessam El-Baz

    (Institute of Energy Economy and Application Technology, Technical University of Munich, Arcisstr. 21, 80333 Munich, Germany)

  • Peter Tzscheutschler

    (Institute of Energy Economy and Application Technology, Technical University of Munich, Arcisstr. 21, 80333 Munich, Germany)

  • Ulrich Wagner

    (Institute of Energy Economy and Application Technology, Technical University of Munich, Arcisstr. 21, 80333 Munich, Germany)

Abstract

There is a continuous growth of heat pump installations in residential buildings in Germany. The heat pumps are not only used for space heating and domestic hot water consumption but also to offer flexibility to the grid. The high coefficient of performance and the low cost of heat storages made the heat pumps one of the optimal candidates for the power to heat applications. Thus, several questions are raised about the optimal integration and control of heat pump system with buffer storages to maximize its operation efficiency and minimize the operation costs. In this paper, an experimental investigation is performed to study the performance of a ground source heat pump (GSHP) with a combi-storage under several configurations and control factors. The experiments were performed on an innovative modular testbed that is capable of emulating a ground source to provide the heat pump with different temperature levels at different times of the day. Moreover, it can emulate the different building loads such as the space heating load and the domestic hot water consumption in real-time. The data gathered from the testbed and different experimental studies were used to develop a simulation model based on Modelica that can accurately simulate the dynamics of a GSHP in a building. The model was validated based on different metrics. Energetically, the difference between the developed model and the measured values was only 3% and 4% for the heat generation and electricity consumption, respectively.

Suggested Citation

  • 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.
    • Handle: RePEc:gam:jeners:v:11:y:2018:i:5:p:1174-:d:145021
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    References listed on IDEAS

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    Cited by:

    1. 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.
    2. Bryś, Krystyna & Bryś, Tadeusz & Sayegh, Marderos Ara & Ojrzyńska, Hanna, 2020. "Characteristics of heat fluxes in subsurface shallow depth soil layer as a renewable thermal source for ground coupled heat pumps," Renewable Energy, Elsevier, vol. 146(C), pages 1846-1866.
    3. Wessam El-Baz & Lukas Mayerhofer & Peter Tzscheutschler & Ulrich Wagner, 2018. "Hardware in the Loop Real-Time Simulation for Heating Systems: Model Validation and Dynamics Analysis," Energies, MDPI, vol. 11(11), pages 1-15, November.
    4. Valeria Palomba & Efstratios Varvagiannis & Sotirios Karellas & Andrea Frazzica, 2019. "Hybrid Adsorption-Compression Systems for Air Conditioning in Efficient Buildings: Design through Validated Dynamic Models," Energies, MDPI, vol. 12(6), pages 1-28, March.

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