Effect of a Geothermal Heat Pump in Cooling Mode on the Housing Environment and Swine Productivity Traits
This study compared the effects of the cooling mode of a geothermal heat pump (GHP) system with those of a traditional cooling system (ventilation fans) inside a pig house on the internal house temperature, harmful gas emissions, and the growth performance of the pigs. During the 19-week experimenta...
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| Autores principales: | , , , , , , , , |
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| Formato: | article |
| Lenguaje: | EN |
| Publicado: |
MDPI AG
2021
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| Materias: | |
| Acceso en línea: | https://doaj.org/article/cb9e507e976c460b82c8610753affca7 |
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| Sumario: | This study compared the effects of the cooling mode of a geothermal heat pump (GHP) system with those of a traditional cooling system (ventilation fans) inside a pig house on the internal house temperature, harmful gas emissions, and the growth performance of the pigs. During the 19-week experimental period, the temperature inside the house connected to the GHP cooling system was significantly lower (<i>p</i> < 0.05) than that of a house with a conventional cooling system. Similarly, the temperature–humidity index (THI) was significantly reduced (<i>p</i> < 0.05) in the GHP cooling system-connected pig house. Furthermore, the concentrations of ammonia (NH<sub>3</sub>) and hydrogen sulfide (H<sub>2</sub>S) were also decreased significantly in the GHP-installed pig house (<i>p</i> < 0.05). However, no differences were observed in the concentrations of particulate matter (PM<sub>2.5</sub>) and formaldehyde (<i>p</i> > 0.05). The pigs reared in the GHP-equipped pig house gained significantly more weight (<i>p</i> < 0.05) by the end of the experiment. The GHP cooling system can therefore be implemented as a renewable, environmentally friendly energy source in pig farms for sustainable swine production without adversely affecting the productivity parameters. |
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