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Long-Term Temperature Evaluation of a Ground-Coupled Heat Pump System Subject to Groundwater Flow
Article

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

1
Institute of Agricultural Engineering, University of Bonn, Nußallee 5, 53115 Bonn, Germany
2
Institute of Animal Science, University of Bonn, Endenicher Allee 15, 53115 Bonn, Germany
3
AGRAVIS Futtermittel GmbH (Animal Feeding Company), Industrieweg 110, 48115 Münster, Germany
4
Agricultural Engineering Department, Faculty of Agriculture, Cairo University, El-Gammaa Street, Giza 12613, Egypt
*
Author to whom correspondence should be addressed.
Energies 2020, 13(3), 662; https://doi.org/10.3390/en13030662
Received: 19 December 2019 / Revised: 23 January 2020 / Accepted: 23 January 2020 / Published: 4 February 2020
(This article belongs to the Special Issue Volume II: Low Enthalpy Geothermal Energy)
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 m3 d−1 (piglet-rearing barn) and 99.1 m3 d−1 (farrowing barn). In conclusion, by using energy from groundwater, GWHPs have the potential to substitute fossil fuels, thus saving them and avoiding CO2 emissions. View Full-Text
Keywords: renewable energy; groundwater; livestock building; heating; coefficient of performance; climate change; resources; sustainability renewable energy; groundwater; livestock building; heating; coefficient of performance; climate change; resources; sustainability
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MDPI and ACS Style

Licharz, H.; Rösmann, P.; Krommweh, M.S.; Mostafa, E.; Büscher, W. Energy Efficiency of a Heat Pump System: Case Study in Two Pig Houses. Energies 2020, 13, 662. https://doi.org/10.3390/en13030662

AMA Style

Licharz H, Rösmann P, Krommweh MS, Mostafa E, Büscher W. Energy Efficiency of a Heat Pump System: Case Study in Two Pig Houses. Energies. 2020; 13(3):662. https://doi.org/10.3390/en13030662

Chicago/Turabian Style

Licharz, Hannah, Peter Rösmann, Manuel S. Krommweh, Ehab Mostafa, and Wolfgang Büscher. 2020. "Energy Efficiency of a Heat Pump System: Case Study in Two Pig Houses" Energies 13, no. 3: 662. https://doi.org/10.3390/en13030662

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