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Energy Efficiency of a Heat Pump System: Case Study in Two Pig Houses

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  • Hannah Licharz

    (Institute of Agricultural Engineering, University of Bonn, Nußallee 5, 53115 Bonn, Germany
    Institute of Animal Science, University of Bonn, Endenicher Allee 15, 53115 Bonn, Germany)

  • Peter Rösmann

    (AGRAVIS Futtermittel GmbH (Animal Feeding Company), Industrieweg 110, 48115 Münster, Germany)

  • Manuel S. Krommweh

    (Institute of Agricultural Engineering, University of Bonn, Nußallee 5, 53115 Bonn, Germany)

  • Ehab Mostafa

    (Agricultural Engineering Department, Faculty of Agriculture, Cairo University, El-Gammaa Street, Giza 12613, Egypt)

  • Wolfgang Büscher

    (Institute of Agricultural Engineering, University of Bonn, Nußallee 5, 53115 Bonn, Germany)

Abstract

This study describes a 70-day investigation of three identical groundwater heat pumps (GWHP) for heating two pig houses located on the same farm in West Germany. Two of the three GWHPs were installed in a piglet-rearing barn, the third in a farrowing barn. All three heat pumps were fed from the same extraction well. The aim of this study was firstly the empirical performance measurement of the GWHP systems and secondly the energetic evaluation of the systems on barn level by calculating the coefficient of performance (COP). Three different assessment limits were considered in order to better identify factors influencing the COP. In total, the heat pumps supplied thermal energy of 47,160 kWh (piglet-rearing barn) and 36,500 kWh (farrowing barn). Depending on the assessment limit considered, the COP in piglet-rearing barn and farrowing barn ranged between 2.6–3.4 and 2.5–3.0, respectively. A significant factor influencing the COP is the amount of electrical current required to operate the groundwater feeding pump. The average groundwater flow rate was 168.4 m 3 d −1 (piglet-rearing barn) and 99.1 m 3 d −1 (farrowing barn). In conclusion, by using energy from groundwater, GWHPs have the potential to substitute fossil fuels, thus saving them and avoiding CO 2 emissions.

Suggested Citation

  • Hannah Licharz & Peter Rösmann & Manuel S. Krommweh & Ehab Mostafa & Wolfgang Büscher, 2020. "Energy Efficiency of a Heat Pump System: Case Study in Two Pig Houses," Energies, MDPI, vol. 13(3), pages 1-20, February.
    • Handle: RePEc:gam:jeners:v:13:y:2020:i:3:p:662-:d:316462
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    References listed on IDEAS

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    1. Mustafa Omer, Abdeen, 2008. "Ground-source heat pumps systems and applications," Renewable and Sustainable Energy Reviews, Elsevier, vol. 12(2), pages 344-371, February.
    2. Alberti, Luca & Antelmi, Matteo & Angelotti, Adriana & Formentin, Giovanni, 2018. "Geothermal heat pumps for sustainable farm climatization and field irrigation," Agricultural Water Management, Elsevier, vol. 195(C), pages 187-200.
    3. Lucia, Umberto & Simonetti, Marco & Chiesa, Giacomo & Grisolia, Giulia, 2017. "Ground-source pump system for heating and cooling: Review and thermodynamic approach," Renewable and Sustainable Energy Reviews, Elsevier, vol. 70(C), pages 867-874.
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    Cited by:

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    3. Hauke F. Deeken & Alexandra Lengling & Manuel S. Krommweh & Wolfgang Büscher, 2023. "Improvement of Piglet Rearing’s Energy Efficiency and Sustainability Using Air-to-Air Heat Exchangers—A Two-Year Case Study," Energies, MDPI, vol. 16(4), pages 1-30, February.
    4. Manuel S. Krommweh & Hauke F. Deeken & Hannah Licharz & Wolfgang Büscher, 2021. "Heating Performance and Ammonia Removal of a Single-Stage Bioscrubber Pilot Plant with Integrated Heat Exchanger under Field Conditions," Energies, MDPI, vol. 14(20), pages 1-17, October.
    5. Marco Briceño-León & Dennys Pazmiño-Quishpe & Jean-Michel Clairand & Guillermo Escrivá-Escrivá, 2021. "Energy Efficiency Measures in Bakeries toward Competitiveness and Sustainability—Case Studies in Quito, Ecuador," Sustainability, MDPI, vol. 13(9), pages 1-20, May.
    6. Haopu Li & Haoming Li & Bugao Li & Jiayuan Shao & Yanbo Song & Zhenyu Liu, 2023. "Smart Temperature and Humidity Control in Pig House by Improved Three-Way K-Means," Agriculture, MDPI, vol. 13(10), pages 1-22, October.

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