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        검색결과 16

        4.
        2018.04 KCI 등재 구독 인증기관 무료, 개인회원 유료
        In order to effectively utilize thermal energy, we analyzed the performance of the high efficiency latent heat storage system which can be used for greenhouse heating by using the developed phase change material. The system consists of hot water boiler, heat storage material, heat storage box, heat storage tank, circulation pump, control panel, and storage material. As a result, the latent heat and latent heat temperature of sodium acetate hydrate as latent heat storage material are 231.6 ~ 264.8kJ/kg, 54.95 ~ 55.48℃. As the number of cooling and heating increased, the latent heat temperature showed a slight change, but the latent heat decreased 33.1kJ/kg as the number of repetition increased. In the case of sodium acetate hydrate, large supercooling phenomenon was observed, and it was found that mixing of additives such as nucleating agent, thickener and supercooling agent can control the supercooling more effectively. The consumption of kerosene decreased until the temperature of the heat storage tank was raised to the set temperature by the closed circuit for 4 hours in the initial stage of the boiler operation. The heat exchange rate according to the change of the flow rate was maintained at the set temperature inside the heat storage tank after 4 hours of operation, Consumption was high. As the flow rate increased, the inlet and outlet temperature difference decreased, the heat exchange rate increased, and the heat exchange efficiency was in the range of 57.4 ~ 60.5%.
        4,000원
        5.
        2016.10 구독 인증기관 무료, 개인회원 유료
        Results of this study appeared chicken breeding households nationwide in 3,323 households. Local broiler breeding two numbers are Jeonbuk>Chungnam>Jeonnam> Gyeonggi>Gyeongbuk>Chungbuk>Gyeongnam>Gangwon>Jeju appeared in other net. Local chicken breeding numbers are Chungnam>Jeonbuk>Gyeongbuk>Jeonam> Chungbuk>Gyeongnam>Gangwon appeared in order. Livestock mortality is 482,000 numbers in 2012, and 911,000 numbers in 2014 and 2.494,000 numbers in 2015, a significant increase year by to 4.298,000 numbers in 2016. Insurance 11.2 billion in 2012, 49.8 billion in 2013, 21.2 billion in 2014, 74.5 million won was paid in 2015 is expected to be paid in 2016, 128.4 billion won. A study on the future, preventing livestock damage caused by high temperature will have to continue.
        4,000원
        6.
        2016.06 KCI 등재 구독 인증기관 무료, 개인회원 유료
        In this study, environmental new feeding and management system that are suitable for hot and cool water supply and floor heating system was developed and analyzed the effect for productivity and meat quality with supplying hot water in winter, the results were as follow as. HWSS was not affecting improvement with broiler productivity in initial time. Supplying hot water made the temperature inside broiler barn not go down rapidly as time went by from former term to latter term and continuous supplying hot water made boiler be adapted properly to the temperature and humidity of breeding environment that was requiring at its own growth phases. With unsaturated fatty acid / saturated fatty acids, HWSS was higher in broiler breast but CWSS was higher in the leg. With AST, ALT in blood, HWSS is higher than CWSS but with neutral lipid, protein, glucose, albumin, cholesterol, HWSS is higher than CWSS. Water circulation heating system gave an impact on meat quality and PH showed a higher in CWSS system. Also, redness and yellowness of the meat color was confirmed to be greater in HWSS. It was proved that the temperature difference of drinking water affected farm productivity, the blood and flesh quality, therefore, that could be estimated to be utilized successfully, if that should be used appropriately for productivity improvement according to the week-old of growth phase.
        4,000원
        7.
        2016.02 KCI 등재 구독 인증기관 무료, 개인회원 유료
        The aim of these studies are to provide a basic data for the development of high-efficiency environmental improvement system that can parallel the cage(henhouse) and hot and cold potable water supply for increased summer heat stress relief and winter feed efficiency by optimal design. The cage area is 273m2. The air-to-water heat pump with 20RT capacity was used for heating and cooling. The control was used as an electric hot water boiler. For calculating heating load determined the cage size, materials, heat pump capacity, heating capacity, heat storage tank, and drinking water tank capacity etc. Therefore the capacity of heat pump was set-up using 20RT. The cage was built as a prefabricated panels henhouse of 13×21×4.5 m (width×depth×height). The heat storage tank and was drinking water tank capacity was constructed 3tons and 10 tons, respectively. In future, it is thought that optimal design considering the cage size and hen breeding scale is required.
        4,000원
        8.
        2015.11 구독 인증기관 무료, 개인회원 유료
        In this study, to develop high-efficiency environmental improvement system that can be combined with hot and cold potable water supply to poultry air conditioning for the summer increase heat stress relief and winter feed efficiency through optimal design hwihan The aim of this study was to provide basic data. As a cage the size of the system installed is 100m2 test capacity 20RT district heating and cooling of air-to-water heat pump and the control was composed of electric hot water boilers. First of cage sizes for heating load design, materials, heat pump capacity, air capacity, storage tank, drinking water tank capacity, etc. were determined. The capacity of the heat pump was set to 20RT cage captive birds are erected as vertically and horizontally × height × (13 × 21 × 4.5m). Storage tank 3 tons and capacity of 10 tons potable water tank was designed. In the future, the size of the cage, designed according to the best breeding two numbers are needed.
        4,000원
        14.
        1974.09 KCI 등재 구독 인증기관 무료, 개인회원 유료
        쇠파리의 실내 대량사육을 위한 시험에서 산란전기간을 단축 시킴으로써 사충율을 저하시키며 누대사육에 의한 위소현상을 조사하기 위해 각 세대별 용중량의 차이를 조사 하였으며 쇠파리는 성충기 이외에는 자웅구별이 불가능하므로 용중량에 의한 성구별을 시도한 결과는 다음과 같다. 1) 유충 media로부터 용을 분리할 때 사용하는 물을 약 로 가온하여 용을 채취한 결과 산란전기간이 8일로 단축되었다. 2) 누대사육에 의한 세대별 위소현상 조사에서 명세대별 용중량차이에는 유의성이 없었으며 사육온도에 따라서 많은 차이를 보였다. 3) 용중량의 차이에 의한 성구별은 약 의 웅충구별이 가능하였다
        3,000원