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다비상엽(多肥桑葉)의 사료가치(飼料價値)에 관(關)한 연구(硏究)
문재유 ( J. Y. Moon ),김윤식 ( Y. S. Kim ),김낙정 ( N. J. Kim ),이윤환 ( Y. W. Lee ) 한국잠사학회 1970 한국잠사곤충학회지 Vol.11 No.-
최근 상문의 생산성을 향상시키기 위하여 우리나라 양잠농가의 실정을 감안할 정도의 다비재배를 할 경우 다비상엽에 대한 누에의 사료가치를 구명하고자 약 1년간 (1969.3월~1969.12월)를 연구기간으로 하여 사육시험에 의하여 얻어진 결과를 실험통계적인 면에서, 다비상엽의 성분분석에 의하여 얻어진 결과를 누에의 영양요구 면에서 고찰하였다. 고찰결과 N 44.4kg, P2O5 18.4kg, K2O 34.4kg (년간 10a 당)까지 시여한 다비상엽이라도 누에의 충질과 견질에 영향이 없는 동시에 누에의 사료가치가 인정되었다. In the light of the present situation of fertilizing presently apllied in farmer`s mulberry fields, it was considered to be value enough to carry out the experiment on whether its degree of fertilizing have no affect on silkworm growth and their cocoon harvest as well, so that the results thus obtained from the experiment are as following; The amount of fertilizing, N 44.4kg, P2O5 18.4kg, and K2O 34.4kg, respectively were minimum for the. East affect on the silkworm growth and cocoon yields.
밀폐용기내의 물의 저압 증발 최적조건에 관한 실험적 연구
김세현(S. H. Kim),신유식(Y. S. Shin),이윤환(Y. W. Lee),정효민(H. M. Jeong),정한식(H. S. Chung) 한국동력기계공학회 2004 동력시스템공학회지 Vol.8 No.1
Cooling towers are widely used not only for cooling products and equipment in manufacturing process but HVAC(Heating, Ventilation and Air Conditioning) system. As a cooling tower is the terminal apparatus which discharges heat from industrial process, the efficiency of heat exchange in the cooling tower greatly affect to the overall performance of a thermal system. In this paper, we constituted a new water cooling system by using a Latent heat of evaporation in an enclosed tank, and this system is consisted of an enclosed vacuum tank and water driven ejector system. Several experimental cases were carried out for improvement methods of high vacuum pressure and water cooling characteristics. The ejector performance was tested in case of water temperature variations that flows into the ejector. Based on the vacuum pressure by water driven ejector, the water cooling characteristics were investigated for the vaporized air condensing effects.