Journal of the Korean Society of Mechanical Technology (한국기계기술학회지)

Korean Society of Mechanical Technology (한국기계기술학회)
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Study on the Utilization of Drinking Water Supply System of Air-water Heat Pumps Applicable to Laying Hen

산란계에 적용 가능한 공기-물 히트펌프의 음용수 공급시스템 이용기술에 관한 연구

  • Paek, Yee (National Institudeof Agricultural Sciences, RDA) ;
  • Kang, Suk-Won (Department of Agricultural Engineering, National Institute of Agricultural Science) ;
  • Jang, Jae-Kyung (Department of Agricultural Engineering, National Institute of Agricultural Science) ;
  • Kwon, Jin-Kyung (Department of Agricultural Engineering, National Institute of Agricultural Science)
  • Received : 2018.10.04
  • Accepted : 2018.11.21
  • Published : 2018.12.28
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Abstract

The drinking water supply system applicable to the laying hen consists of air-water heat pumps, drinking water tanks, heat stroage tank, circulation pumps, PE pipes, nipples, and control panels. When the heat pump system has power of 7.7 to 8.7 kW per hour, the performance coefficient is between 3.1 and 3.5. The supply temperature from the heat pump to the heat stroage tank was stabilized at about $12{\pm}1^{\circ}C$, but the return temperature showed a variation of from 8 to $14^{\circ}C$. Stratified temperature in the storage tank appeared at $12.^{\circ}C$, $13.5^{\circ}C$ and $14.4^{\circ}C$, respectively. The drinking water supply temperature remained set at $15^{\circ}C$ and $25^{\circ}C$, and the conventional tap water showed a variation for $23^{\circ}C$ to $30^{\circ}C$. As chickens grow older, the amount of food intake and drinking water increased. $y=-0.0563x^2+4.7383x+8.743$, $R^2=0.98$ and the feed intake showed $y=-0.1013x^2+8.5611x$. In the future, further studies will need to figure out the cooling effect on heat stress of livestock.

Keywords

Acknowledgement

Supported by : 국립농업과학원

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