• 동의생리병리학회지
• /
• 제24권4호
• /
• pp.553-558
• /
• 2010

Nutrient and Blood are really common conceptions in Traditional Korean Medicine(TKM). However, those are used in mixed. not only because of their common points but users who doesn't have clear classifications between them. Therefore, I will explain those owns by explaining origins, places of origons, pathway, circulations, organs related to them and color. In addition, I will try to explain thi things in common without conceptions of their own. As a result, the first, nutrient is what is originated from water and food at middle energizer and circulated in meridian vessel by control of spleen. The second, blood is what is originated from qi of water and food and circulated in blood vessel by control of heart and its color is red. The third, nutrient blood is what is originated from water and food or qi of water and food and circulated in meridian or blood vessel by control of spleen and heart. Also it is red and its function is nourishing human body. The name of Nutrient blood is a new term that I made and it is different from nutrient or blood. Also it is different from nutrient and blood. Nutrient blood is combination by conceptions, nutrient and blood is combination by word itself.

• 대한기계학회논문집B
• /
• 제24권4호
• /
• pp.543-554
• /
• 2000

The engineering equations, which have been used in many engineering companies, were employed for the dynamic modelling part in order to develop the naturally circulated boiler simulator. The fuzzy algorithm, which is similar to the algorithm of making decision by the human being, was developed for the boiler simulator controller and its simulated variables were compared with those of classical PID simulations to verify the stability and the effectiveness of fuzzy controller. The simulator is for the naturally circulated boiler and the main components are the furnace, the drum, the super heater, and the economizer. The combustion and thermal radiation dominant equations were used within the furnace and the mass conservation and the energy rate balance equations were employed for the drum part. The heat transfer rates were calculated using the logarithmic mean temperature differences both for the super heater and for the economizer. The simulations are very useful to understand the boiler operations and the engineering design of the main components. The main program was developed under the PC window condition by linking the fuzzy controller to the main boiler program using the Visual C++ language. The various operational conditions such as the abrupt changes of load, the changes of water supply pipes and the diameter of drum were simulated.

• 한국자원식물학회:학술대회논문집
• /
• 한국자원식물학회 2018년도 춘계학술발표회
• /
• pp.100-100
• /
• 2018

물 고추냉이는 십자화과의 숙근성 다년생 초본식물로서 일본과 대만 등에서 재배되며 세계 여러 나라에서 식품, 가공원료, 향신료, 의약소재 등으로 이용되고 있다. 우리나라에서는 철원과 무주 등에서 재배되고 있으나 재배환경 및 기술의 한계로 규모와 생산량은 매우 저조한 실정이다. 따라서 본 연구는 물 고추냉이 순환 베드시스템 개발을 위한 기초연구로 수행되었다. 마사토의 높이와 고랑의 유무에 따라 3개 베드 (A-마사토 높이 4.0cm, 고랑 있음, B-마사토 높이 5.5cm, 고랑 있음, C-마사토 높이 7.0cm, 고랑 없음)로 시험하였다. 물 고추냉이의 생장량과 식물체 내의 양분 분석(질소, 인산, 칼륨)을 분석하였다. 그 결과 베드 높이가 가장 낮고(4cm) 고랑이 있는 베드에서 생장량이 가장 우수하였고 마사토 높이가 가장 높은(7cm) 처리구보다 생장량이 2배 이상 증가하였다. 전체적으로 엽장보다 엽폭이 길었고 심장형 잎의 특성을 그대로 나타내었다. 식물체 내의 양분 분석 결과 처리구 별로 질소, 인산, 칼륨의 함량 차이가 크게 나타났다. A 베드에서 질소 4,150, 인산 500, 칼륨 1,500ppm 에 비하여 C 베드는 질소 730, 인산 120, 칼륨 700ppm 정도로 낮았다. 대조구의 동일 지역, 동일 기간의 계류지 하우스재배(데이터 미발표)에 비해 순환식 베드 재배가 우수하였고, 특히 A 베드에서 가장 우수하여 절수, 2단 재배 등의 예상되는 효과를 감안할 때 물 고추냉이 순환식 베드 재배의 가능성이 충분하다고 판단된다.

• 한국기계가공학회지
• /
• 제18권10호
• /
• pp.20-26
• /
• 2019

This study was conducted on cooling systems in which, for the first time at home and abroad, cold water panels are embedded in the walls of small buildings for radiant cooling by heat absorption with cold water. In summer, cold water is circulated through cold water (chiller) circulation tubes embedded in three walls (two side walls and one rear wall) of a building to implement radiant cooling by the coldness of the water. From the results of this study, the experimental and theoretical natural convection heat transfer coefficients were relatively well-matched over the entire experimental range, thereby verifying the reliability of the experimental results. The surface temperature reduction rate of the walls in which cold water panels are embedded was large whereas that of the walls where no cold water panels are embedded was very small.

• 한국태양에너지학회 논문집
• /
• 제31권5호
• /
• pp.41-46
• /
• 2011

In the present work, a new freeze protection method has been proposed for a natural circulation system of solar water heater. Though electrothermal wire is popularly used for the purpose, there are freezing troubles by wire cut-off and excessive electric power consumption. In the experimental device, hot water in a storage tank was circulated by a small pump and used to heat the outdoor pipes if the cold water pipe surface temperature falls lower than a set point. As a result, It was observed that there was no hot water waste while the solar water heating system operated without freeze and burst.

• 설비공학논문집
• /
• 제8권4호
• /
• pp.550-560
• /
• 1996

Recently, fluidized bed heat exchangers with circulating liquid are widely used in a number of places-chemical, process, food concentration, waste water treatment facilities, etc. In a circulating heat exchanger, solid particles circulate with the liquid, thereby increase the heat transfer and reduce the fouling potential of the heat exchanger. In this study, glass beads were circulated through a vertical tube. The pressure loss and the heat transfer coefficient were measured. At low flow velocities, glass beads enhanced the heat transfer considerably. The enhancement increased as the volume fraction of the glass beads increased. The pressure loss showed a similar trend. From the observed particle behavior near tube wall, a possible explanation of the trend is provided.

• 한국에너지공학회:학술대회논문집
• /
• 한국에너지공학회 1996년도 춘계학술발표회 초록집
• /
• pp.121-131
• /
• 1996

Recently, circulating liquid fluidized bed heat exchangers are widely used in a number of places - chemical, process, food concentration, waste water treatment facilities, etc. In a circulating heat exchanger, solid particles circulate with the liquid, thereby increase the heat transfer and reduce the fouling potential of the heat exchanger. In this study, glass beads were circulated through a vertical tube. The pressure loss and the heat transfer coefficient were measured. At low flow velocities, glass beads enhanced the heat transfer considerably. The enhancement increased as the volume fraction of the glass beads increased. It also increased as the particle diameter increased. The pressure loss showed a similar trend. From the observed particle behavior near tube wall, a possible explanation of the trend is provided.

• 태양에너지
• /
• 제5권2호
• /
• pp.35-45
• /
• 1985

A solar hot water storage tank was designed and constructed to examine the heat exchange performances on load side for the solar thermal storage in a single loop solar water heating system. In the tank helically coiled tube was immersed. The hot water was circulated from either top or bottom. The circulation flow rate was varied from 500 ml/min to 20,000 ml/min. The effect of flow rate was observed. The thermal performances according to the flow rate and flow direction were examined. The temperature distributions in the tank and inside of the tubes were plotted along the process of cooling.

• Korean Chemical Engineering Research
• /
• 제51권6호
• /
• pp.733-738
• /
• 2013

퇴적토는 미사 및 점토와 같은 미세토의 함량이 높으며, 유기물질이 많으며, 완충능이 크기 때문에 퇴적토로부터 중금속을 제거하는 것은 매우 어렵다. 본 연구에서는, 중금속으로 오염된 퇴적토에서 중금속을 제거하기 위해 2 V/cm의 일정한 전압경사를 적용한 실험실 규모의 전기동력학적 (EK) 정화공법을 사용하였다. 실험을 위해 적용한 음극 전해질로는 0.1 M의 ethylenediaminetetraacetic acid (EDTA), citric acid (CA), $HNO_3$, HCl, 그리고 수돗물을 사용하였으며, 양극 전해질로는 수돗물을 사용하여 순환시켜 주었다. 음극 전해질로 CA를 사용한 실험군에서 Ni, Cu, Zn, Pb는 각각 초기와 비교하여 92.4, 96.1, 97.1, 88.1%의 중금속 제거효율을 보였다. 높은 전압경사를 적용하게 되면, 음극 전해질내에 citrate 및 EDTA가 퇴적토로 이동이 용이하게 되며, 그로 인해 중금속-킬레이트 화합물을 형성하여 중금속의 추출률을 높일 수 있었다. 이러한 결과를 바탕으로, 높은 전압경사를 적용한 EK 실험에서 음극 전해질로 EDTA 혹은 CA를 사용하면 퇴적토로부터 중금속을 효과적으로 추출할 수 있다고 판단된다.

• 펄프종이기술
• /
• 제31권2호
• /
• pp.15-24
• /
• 1999

A new technique for recycling of white water was developed in order to reduce the calcium hardness in a closed OCC recycling system. Calcium ions present in the white water were precipitated as calcium carbonate by reacting with sodium carbonate, and the precipitated $CaCO_3$ was removed from the system using a flotation fractionation method, which has been commonly used in deinking process. In the flotation stage, a mixed gas of $CO_2$-air was purged into the flotation cell because the pH of $Na_2CO_3$-treated white water was reduced to neutral by $CO_2$ gas. Since $CaCO_3$ precipitate tends to stick onto fine fiber surface and then selectively removed from the white water, a proper amount of suspended solid in white water acts as an important factor for deciding the removal efficiency. By the application of $Na_2CO_3$ addition-$CO_2$ flotation to the short circulated white water, the calcium hardness was significantly reduced by 87% and more. Removal of calcium ions with fine fibers led to a drainage improvement, reduction of fresh water consumption, and enhanced efficiency of wet-end chemicals.