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±1°C, but the return temperature showed a variation of from 8 to 14°C. Stratified temperature in the storage tank appeared at 12.°C, 13.5°C and 14.4°C, respectively. The drinking water supply temperature remained set at 15°C and 25°C, and the conventional tap water showed a variation for 23°C to 30°C. As chickens grow older, the amount of food intake and drinking water increased. y = -0.0563x2 + 4.7383x + 8.743, R2 = 0.98 and the feed intake showed y = -0.1013x2 + 8.5611x. In the future, further studies will need to figure out the cooling effect on heat stress of livestock.

ABSTRACT
 1. 서 론
 2. 재료 및 방법
 3. 결과 및 고찰
  3.1 혹서기 연도별 가축 폐사 및 보험금 지급 현황
  3.2 히트펌프 공급전력에 따른 열회수 및 성능계수
  3.3 히트펌프 운전에 따른 공급과 환수온도변화
  3.4 축열조의 높이별 내부온도 분포
  3.5 음용수 저장조에서 공급된 음용수 급수 온도 변화
  3.6 주령별 닭의 음용수 공급량 및 사료섭취량 변화
 4. 결 론
 References

• 백이(National Institudeof Agricultural Sciences, RDA) | Yee Paek Corresponding Author
• 강석원(Department of Agricultural Engineering, National Institute of Agricultural Sciences, Jeonju, Korea) | Suk-Won Kang
• 장재경(Department of Agricultural Engineering, National Institute of Agricultural Sciences, Jeonju, Korea) | Jae-Kyung Jang
• 권진경(Department of Agricultural Engineering, National Institute of Agricultural Sciences, Jeonju, Korea) | Jin-Kyung Kwon