• Title/Summary/Keyword: dry heat

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The Effect of Working Fluid Charge on the Performance of a Heat Pipe for Medium-temperature Solar Thermal Storage System (중온 태양열 축열조용 히트파이프의 작동액체 충전량이 열성능에 미치는 영향)

  • Min, Kyu-Park;Joon, Hong-Boo
    • 한국태양에너지학회:학술대회논문집
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    • 2011.04a
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    • pp.68-73
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    • 2011
  • An experimental study was conducted to investigate the thermal performance of a medium-temperature heat pipe against the charge amount of working fluid. The container and the wick of the heat pipe were made of stainless steel and the working fluid was Dowtherm-A for medium-temperature applications around $250^{\circ}C$. The diameter and length of the heat pipe were 25.4 mm and 1 m, respectively. The maximum thermal load was 1 kW and the working fluid charge ratio varied from 372% to 420%. The results showed that the thermal resistance ranged from 0.12 to $250^{\circ}C/W$ and the effective thermal conductance ranged from 7,703 to $8,898 W/m{\cdot}K$. Dry-out occurred for the heat pipe with 372% fill-charge at the heat load of 950 W, while the other heat pipes with higher charge amount did not encounter dry-out up to 1060 W.

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Literature study on autumn-dryness syndrome (추조(秋燥)에 관(關)한 문헌적(文獻的) 고찰(考察))

  • Han, Jae-Soo;Kwon, Hyuk-Sung;Lee, Joo-Hee;Jung, Sung-Ki;Lee, Hyung-Goo
    • The Journal of Korean Medicine
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    • v.15 no.2 s.28
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    • pp.321-333
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    • 1994
  • 1. Autum-dryness syndrome(秋燥) is caused by dry-warm or dry=-cool weather condition when lower-warmer Eumfen(下焦陰分) was injured by jung hyoul hatal(精血下脫) or taking medicines of dryness in autumn. 2. The symptoms of autum-dryness syndrome are headach, fever, chilling, anhydrosis, dry cough, tinnitis, dry lip, dry skin, chest discomfort in cool-dryness syndrome(凉燥) and headach, fever, dry cough, paroxymal cough, dry skin, chest pain, polydipsia, tinnitis, eye redness, sore throat in heat-dryness syndrome(溫燥). 3. Hyangsochongsitang(香蘇蔥頭湯) chn be applied for terating cool-dryness syndrome(凉燥) and chungjogoopyetang(淸燥救肺湯) for heat-dryness syndrome(溫燥). Sang Hang Tang(桑杏湯) can be administered when the evils located in the upper-warmer, and Yukmihwan(六味丸) can be administered when located in the lower-warmer(下焦) 4. According the determination of treatment based on the differentiation of symptoms and signs. When the symptoms of Weifen syndrome(衛分證) are headach, fever, dry lip or chilling or dypsia and the treatment of weifen syndrome apply Hangsosan(行蘇散) or Sang hang tang(桑杏湯). When the symptoms of Qifen syndrome(氣分證) are tinnitis, eye redness, sore throat, chest discomfort, polydipsia, dry cough, watery diarrhea, constipation and Jibaekjihwang(知栢地黃丸) when Ohingulpitang(五仁橘皮湯) Chungjogupyetang(淸燥救肺湯) can are applied for treating Qifen syndrome(氣分證). When the symptoms of younghylfen syndrome(營血分證) are dry cough, watery diarrhea, dypsia, chest discomfort, hematemesis, epistaxis and agyohwang keum tang(阿膠湯) Oknyujun(玉女煎) can be applied for treating Younghyulfen syndrome(營血分證).

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Effect of Ripening Period, Nitrite Level and Heat Treatment on the Chemical Characteristics of Turkish Dry Fermented Sausage (Sucuk)

  • Kurt, Sukru;Zorba, Omer
    • Asian-Australasian Journal of Animal Sciences
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    • v.23 no.8
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    • pp.1105-1111
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    • 2010
  • In order to determine the potential for reduction of nitrite levels and ripening period with heat treatment, the effects of ripening period (1-13 days), nitrite level (45-195 ppm), and heat treatment (30-$90^{\circ}C$) on lipolysis, peroxide, TBA, proteolysis, and residual nitrite values of sucuk were investigated using response surface methodology. The ripening period significantly (p<0.01) increased lipolysis, peroxide, TBA, and proteolysis values and decreased residual nitrite values. The effects of additional nitrite levels were found to significantly affect peroxide and residual nitrite values. Significant amounts of the additional nitrite levels were reduced during processing and on the first day of ripening periods.

Evaluation of Heat Stress and Comparison of Heat Stress Indices in Outdoor Work (옥외 작업에서의 온열환경 평가 및 온열지수 비교)

  • Kim, Yangho;Oh, Inbo;Lee, Jiho;Kim, Jaehoon;Chung, In-Sung;Lim, Hak-Jae;Park, Jung-Keun;Park, Jungsun
    • Journal of Environmental Health Sciences
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    • v.42 no.2
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    • pp.85-91
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    • 2016
  • Objectives: The objective of this study was to assess heat stress, compare heat stress indices, and evaluate the usefulness of wet bulb globe temperature (WBGT) among outdoor workers exposed to heat during the summer season. Methods: WBGT, dry temperature, and heat index were measured using WBGT measurers (QUESTemp 32 model and QUESTemp 34 model, QUEST, WI, USA) by industrial hygienists from August 27 to September 16, 2015. Heat stress indices were measured at the workplaces of a shipbuilder in Ulsan and a construction site in Daegu. The dry temperature observed by the Automated Synoptic Observing System (ASOS) of the Korea Meteorological Administration was also compared. Results: Dry temperature measured by WBGT is different from that by ASOS. The temperature obtained from ASOS was less than $33^{\circ}C$, above which point a heat wave is forecast by the Korea Meteorological Administration. A heat index above $32.8^{\circ}C$ as a moderate risk was not observed during measurement. WBGT was consistently higher than $22^{\circ}C$, above which the risk of heat-related illness is increased in unacclimated workers involved in work with a high metabolic rate. WBGT was sometimes higher than $28^{\circ}C$, above which the risk of heat-related illness is increased in acclimated workers involved in work with a moderate metabolic rate in September. Conclusion: According to the measurement of heat stress indices, WBGT was more sensitive than heat index and temperature. Thus, general measures to prevent heat-related diseases should be implemented in workplaces during the summer season according to WBGT.

Clinical Practice Guideline for Soyangin Disease of Sasang Constitutional Medicine: Yin-Deficit Diurnal-Heat (Eumheo-oyeol) symptomatology (소양인체질병증 임상진료지침: 음허오열병)

  • Yu, Jun-Sang;Lee, Eui-Ju
    • Journal of Sasang Constitutional Medicine
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    • v.26 no.3
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    • pp.272-280
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    • 2014
  • Objectives This research was carried out to establish the clinical practice guideline(CPG) for Yin-Deficit Diurnal-Heat (Eumheo-oyeol) symptomatology of Soyangin disease. Methods Dongeuisusebowon(sinchuk edition) and several kinds of literatures including journal articles concerning this symptomatology of Soyangin disease were collected and classified. Sasang constitutional specialists' conference was held to make an agreement on the conflicting issues as well. Consensus was drawn as a result of the conference. Results & Conclusions 3 papers were selected as an inclusion and exclusion criteria for the relevant articles to Yin-Deficit Diurnal-Heat (Eumheo-oyeol) symptomatology of Soyangin disease. Yin-Deficit Diurnal-Heat (Eumheo-oyeol) symptomatology consists of two aspects : Yin-Deficit Diurnal-Heat (Eumheo-oyeol) severe pattern and Yin-Deficit Diurnal-Heat (Eumheo-oyeol) critical pattern. In Yin-Deficit Diurnal-Heat (Eumheo-oyeol) severe pattern contains 1 disease, namely, Clear Yang Depletion of Large Intestine (Daejang-cheongyang Moson) pattern (Lower wasting-thirst (Haso) pattern). In Yin-Deficit Diurnal-Heat (Eumheo-oyeol) critical pattern contains 2 diseases, Yin-Deficit Diurnal-Heat (Eumheo-oyeol) pattern and Yin-Deficit Diurnal-Heat (Eumheo-oyeol) advanced pattern. Yin-Deficit Diurnal-Heat (Eumheo-oyeol) symptomatology has several kinds of symptoms like dry mouth, disliking to drink much water, diurnal body fever, coldness on the back and nausea as well as body fever, chest discomfort, constipation or dry stool as a common symptoms of Interior Heat disease. Clear Yang Depletion of Large Intestine (Daejang-cheongyang Moson) pattern (Lower wasting-thirst (Haso) pattern) has above mentioned symptoms and much urine/turbid urine, thin thigh and knee joints and twinge of joint pain over the body. Yin-Deficit Diurnal-Heat (Eumheo-oyeol) pattern has symptoms like indigestion and epigastric discomfort, abdominal pain and vomiting in addition. Yin-Deficit Diurnal-Heat (Eumheo-oyeol) advanced pattern has symptoms like hematemesis as well.

Physical Properties Effect of Dry-Heat and Microwave-Cured Acrylic Resins depending on the Irradiation-Induced Changes (유도광선변화에 따른 건식중합과 마이크로파중합 아크릴레진의 물리적 성질영향)

  • Kim, Gyu-Ri
    • Journal of the Korea Academia-Industrial cooperation Society
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    • v.16 no.7
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    • pp.4388-4397
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    • 2015
  • The purpose of this study was to research the property change of acrylic resins depending on the induced-beam change and research the improved physical property of dry-heat and microwave-cured dental place acrylic resin in order to develop the acrylic resins with the optimum characteristic. As a result of observing flexural rigidity, hardness and color difference, the dry-heat-cured specimens of Vertex RS and Paladent 20 showed ideal property at 5, 15, and 25 kGy irradiation. The microwave-cured specimens of Vertex RS and Paladent 20 showed ideal property at 5 kGy irradiation. The correlation analysis showed a positive correlation among ARD, flexural rigidity (0 418), E coefficient (0.675) and Barcol hardness (0 588). The radiation cure technology is helpful for relieving the contamination caused by the manufacture of polymer composite. It can significantly contribute to the fusion of ultra violet cure technology and nano technology and the improvement of mechanical property without giving effect to the workability of polymer.

Study of the Specific Indicators Calculation of Fire-Heat Pattern Identification and Yin Deficiency Pattern Identification in Stroke (중풍 화열 변증과 음허 변증을 구분하는 특정 지표 산출에 대한 연구)

  • Kang, Baek-Gyu;Kang, Byeong-Kab;Lee, Jung-Sup;Han, Deok-Jin;Nam, Sang-Kyu;Shin, Sun-Ho;Moon, Byung-Soon;Lee, In
    • Journal of Physiology & Pathology in Korean Medicine
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    • v.22 no.6
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    • pp.1368-1373
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    • 2008
  • This study was done to calculate the specific indicators of Fire-Heat Pattern Identification and Yin Deficiency Pattern Identification settled by tentative Korean Standard Differentiation of the Symptoms and Signs for Stroke. The subjects were 764 hospitalized patients with stroke, and a list of registry was made for each of them. Frequency and Correlations among Fire-Heat and Yin Deficiency indicators were studied. Fire-Heat pattern group included 175 patients out of 764, Yin Deficiency pattern group included 103 patients out of 764. Among the indicators of Fire-Heat pattern, those, in order of highest frequency, were 'heat vexation and aversion to heat', 'reddened complexion', 'thirst'. Among the indicators of Yin Deficiency pattern, those, in order of highest frequency, were 'dry mouth', 'red tongue', 'fine and rapid pulse'. Among the Fire-Heat pattern indicators, 'yellow fur' and 'thirst', 'heat vexation in the chest' and 'vexation and insomnia' showed most significant correlation. Among the Yin Deficiency pattern indicators, 'aphtha or tongue sore' and 'heat in the palms and soles', 'red tongue' and 'dry fur' showed most significant correlation. 'Reddened complexion', 'dry eyes', 'surging and parid pulse', 'heat vexation and aversion to heat' are classify between Fire-Heat pattern and Yin Deficiency pattern. 'Surging and parid pulse', 'Reddened complexion' are mostly representative of Fire-Heat pattern and 'fine and rapid pulse' are mostly representative of Yin Deficiency pattern.

A New Method to Retrieve Sensible Heat and Latent Heat Fluxes from the Remote Sensing Data

  • Liou Yuei-An;Chen Yi-Ying;Chien Tzu-Chieh;Chang Tzu-Yin
    • Proceedings of the KSRS Conference
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    • 2005.10a
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    • pp.415-417
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    • 2005
  • In order to retrieve the latent and sensible heat fluxes, high-resolution airborne imageries with visible, near infrared, and thermal infrared bands and ground-base meteorology measurements are utilized in this paper. The retrieval scheme is based on the balance of surface energy budget and momentum equations. There are three basic surface parameters including surface albedo $(\alpha)$, normalized difference vegetation index (NOVI) and surface kinetic temperature (TO). Lowtran 7 code is used to correct the atmosphere effect. The imageries were taken on 28 April and 5 May 2003. From the scattering plot of data set, we observed the extreme dry and wet pixels to derive the fitting of dry and wet controlled lines, respectively. Then the sensible heat and latent heat fluxes are derived from through a partitioning factor A. The retrieved latent and sensible heat fluxes are compared with in situ measurements, including eddy correlation and porometer measurements. It is shown that the retrieved fluxes from our scheme match with the measurements better than those derived from the S-SEBI model.

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Effect of Heat Treatment Conditions on the Microstructure and Wear Behavior of Ni-based Self-flux Alloy Coatings (니켈기 자융성 합금 코팅층의 미세구조 및 마모거동에 미치는 후열처리 조건의 영향)

  • Kim, K.T.;Oh, M.S.;Kim, Y.S.
    • Journal of Power System Engineering
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    • v.11 no.1
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    • pp.121-126
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    • 2007
  • This study aims at investigating the effect of heat treatment conditions on the dry sliding wear behavior of thermally sprayed Ni-based self-flux alloy coatings. Ni-based self-flux alloy powders were sprayed onto a carbon steel substrate and then heat-treated at 700, 800, 900 and $1000^{\circ}C$ for 30 minutes in a vacuum furnace. Dry sliding wear tests were performed using sliding speed of 0.4 m/s and applied load of 6 N. AISI 52100 ball(diameter 8 mm) was used as counterparts. Microstructure and wear behavior of both as-sprayed and heat-treated Ni-based self-flux alloy coatings were studied using a scanning electron microscope(SEM), energy dispersive X-ray spectroscopy(EDX), electron probe micro-analysis(EPMA) and X-ray diffraction(XRD). It was revealed that microstructure and wear behavior of thermally sprayed Ni-based self-flux alloy coatings were much influenced by heat treatment conditions.

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Heat Treatment and Drying Methods of Small-Notched Bamboo for Vertical Flute (단소용 대나무재의 열처리 및 건조)

  • 변희섭;오승원;공태석;김종만
    • Journal of Korea Foresty Energy
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    • v.21 no.3
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    • pp.10-17
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    • 2002
  • This study was carried out to investigate a heat treatment condition and suitable drying schedule of bamboo material(Phyllostachys nigra var. henonis) for a vertical flute with small-notched bamboo. It is very important to prevent drying defects during its drying process. We investigated the effort of heat treatment the most suitable drying schedule for small-notched bamboo vertical flute without drying defects in this research. A direct heat treatment method and drying conditions of 3($20^{\circ}C$ 65%, $40^{\circ}C$ 40%, and dry at air condition) were applied to the Bamboo specimen that felled in several areas for a month. The result suggested that the most suitable drying schedule with the less split and the shortest time was to dry at $40^{\circ}C$, 40% condition and it was useful to direct heat-treatment because of reducing the number and size of split during drying bamboo.

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