• Title/Summary/Keyword: temperature influence

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An Experimental Study on the Safely of Portable Butane Gas Range (휴대용 부탄 가스 레인지의 안전성에 관한 실험적 연구)

  • 이근오;이장우;김종현
    • Journal of the Korean Society of Safety
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    • v.15 no.3
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    • pp.23-29
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    • 2000
  • The objective of this paper is to study burst through the influence of overheating to affect a seamed container using the cookers with different materials and bottom sizes. Following result are drawn from this study; When bottom size of the roast meat had 24cm diameter, the upper part temperature of a seamed container was increased over $40^{\circ}C$. Therefore the cooker material without regard to cooker size had a great influence on the temperature of seamed container. For the natural stone plate which had bottom length 65cm, a seamed container was burst at the cooker temperature $801^{\circ}C$, the surface temperature of a burner $573^{\circ}C$. the upside temperature of seamed container $379^{\circ}C$, the downside temperature of seamed container $236^{\circ}C$ and ambient temperature $34^{\circ}C$. For the cooker of the same bottom area, the stone plate had greater influence on effect of temperature than aluminium cooker. Overheating had a great influence on the seamed container if the bottom or upside diameter of a cooker had been larger than a trivet.

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A Study of the Influence of Condensing Water Temperature on Low Temperature Geothermal Power Generation (응축수온도가 저온지열발전 성능에 미치는 영향 연구)

  • Kim, Jin-Sang;Lee, Chung-Kook
    • Journal of the Korean Society for Geothermal and Hydrothermal Energy
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    • v.3 no.2
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    • pp.17-23
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    • 2007
  • Geothermal energy is used in various forms, such as power generation, direct use, and geothermal heat pumps. High temperature geothermal energy sources have been used for power generation for more than a century. Recent technical advances in power generation equipments make relatively low temperature geothermal energy to be available for power generation. In these applications, lower temperature geothermal energy source makes smaller difference between condensing water temperature and it. Various condensing water temperatures were investigated in analyzing its influence on power generation performance. Condensing water temperature of organic Rankine cycle imposed greater influence on power generation and its performance in lower temperature geothermal power generation.

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The Influence of Storage at Very Low Temperatures on the Deterioration of Concrete (극저온 하에서의 일정 온도유지가 콘크리트의 열화에 미치는 영향)

  • 한상묵;조명석;송영철
    • Proceedings of the Korea Concrete Institute Conference
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    • 2002.10a
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    • pp.667-672
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    • 2002
  • Concrete cooled to very low temperature cyclically is deteriorated by ice formation in micro-pores. Although the factors to the deterioration are various, storage at very low temperature is mentioned as one of the factors. In practice, storage of cryogenic structure is kept at very low temperatures, and as such, it is important to take into consideration the influence of storage at such low temperature on the deterioration of concrete. Thus, in this study, the influence of storage on the deterioration of concrete at minimum temperatures taking into consideration the different W/C and air content.

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The influence of outside temperature upon shading effect in greenhouses (외기온이 온실의 차광효과에 미치는 영향)

  • 이석건;이종원;이현우
    • Proceedings of the Korean Society of Agricultural Engineers Conference
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    • 1998.10a
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    • pp.243-249
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    • 1998
  • This study was conducted for analyzing the influence of outside temperature upon shading effect of greenhouses by simulation. The simulation program was tested by comparing predicted values to measured values and applied the Korean standard wide span glasshouse. The shading effect according to the variation of outside temperature was different by shading method and rate. The increasing rate of inside temperature with different shading rate was nearly propotional to the increasing value of outside temperature. The outside shading effect was a little better than inside shading.

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INFLUENCE OF GEAR OIL FORMULATION ON OIL TEMPERATURE

  • Wienecke, D.;Bartz, W.J.
    • Proceedings of the Korean Society of Tribologists and Lubrication Engineers Conference
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    • 2002.10b
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    • pp.311-312
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    • 2002
  • Friction losses in complex tribo-technical system are revealed primarily through their effect on the operating temperature level. In order to assess the influence of the oil formulation on the temperature level comprehensive tests were run in a model test apparatus consisting of a special adapter for the 4-ball test rig. More than ten with different formulations (different base oils, additive packages and viscosity modifiers) were tested, The resulting temperature levels varied by nearly 25 %. The objective of this model testing is to assess the influence of the oil formulation on the operating temperature of vehicle manual transmission. The correlation to the real tribotechnical system was confirmed by a VW Polo transmission test.

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A Study on Solar Power Generation Efficiency Empirical Analysis according to Temperature and Wind speed (온도와 풍속에 따른 태양광발전 효율 실증분석 연구)

  • Cha, Wang-Cheol;Park, Joung-Ho;Cho, Uk-Rae;Kim, Jae-Chul
    • The Transactions of the Korean Institute of Electrical Engineers P
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    • v.64 no.1
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    • pp.1-6
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    • 2015
  • Factors that have influence on solar power generation are specified into three aspects such as meteorological, geographical factors as well as equipment installation. Meteorological factors influence the most among the three. Insolation, sunshine hours, and cloud directly influence on solar power generation, whereas temperature and wind speed have impacts on equipment installation. This paper provides explanation over temperature-wind speed equation by calculating influence of temperature and wind speed on equipment installation. In order to conduct a research, pyranometer, anemometer, air thermometer, module thermometer are installed in 2MWp solar power plant located in South Cholla province, so that real-time meteorological data and generating amount can be analyzed through monitoring system. Besides, if existing and new methods are applied together, accuracy of prediction for generating amount is improved.

Analysis of climate change mitigations by nuclear energy using nonlinear fuzzy set theory

  • Tae Ho Woo;Kyung Bae Jang;Chang Hyun Baek;Jong Du Choi
    • Nuclear Engineering and Technology
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    • v.54 no.11
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    • pp.4095-4101
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    • 2022
  • Following the climate-related disasters considered by several efforts, the nuclear capacity needs to double by 2050 compared to 2015. So, it is reasonable to investigate global warming incorporated with the fuzzy set theory for nuclear energy consumption in the aspect of fuzziness and nonlinearity of temperature variations. The complex modeling is proposed for the enhanced assessment of climate change where simulations indicate the degree of influence with the Boolean values between 0.0 and 1.0 in the designed variables. In the case of OIL, there are many 1.0 values between 20th and 60th months in the simulations where there are 10 times more for a 1.0 value in influence. Hence, the temperature variable can give the effective time using this study for 100 months. In the analysis, the 1.0 value in NUCLEAR means the highest influence of the modeling as the temperature increases resulting in global warming. In detail, the first influence happens near the 8th month and then there are four times more influences than effects in the early part of the temperature mitigation. Eventually, in the GLOBAL WARMING, the highest peak is around the 20th month, and then it is stabilized.

Research on the Influence of Inter-turn Short Circuit Fault on the Temperature Field of Permanent Magnet Synchronous Motor

  • Qiu, Hongbo;Yu, Wenfei;Tang, Bingxia;Yang, Cunxiang;Zhao, Haiyang
    • Journal of Electrical Engineering and Technology
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    • v.12 no.4
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    • pp.1566-1574
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    • 2017
  • When the inter-turn short circuit (ITSC) fault occurs, the distortion of the magnetic field is serious. The motor loss variations of each part are obvious, and the motor temperature field is also affected. In order to obtain the influence of the ITSC fault on the motor temperature distribution, firstly, the normal and the fault finite element models of the permanent magnet synchronous motor (PMSM) were established. The magnetic density distribution and the eddy current density distribution were analyzed, and the mechanism of loss change was revealed. The effects of different forms and degrees of the fault on the loss were obtained. Based on the loss analysis, the motor temperature field calculation model was established, and the motor temperature change considering the loop current was analyzed. The influence of the fault on the motor temperature distribution was revealed. The sensitivity factors that limit the motor continuous operation were obtained. Finally, the correctness of the simulation was verified by experiments. The conclusions obtained are of great significance for the fault and high temperature demagnetization of the permanent magnet analysis.

Studies on the cigarette hardness(II) The Influence of relative humidity, temperature and net weight on cigarette hardness (담배 경도에 관한 연구(II) 상대습도, 온도 및 진충량이 담배의 경도에 미치는 영향)

  • 정한주;민영근;김병구;김기환
    • Journal of the Korean Society of Tobacco Science
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    • v.13 no.1
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    • pp.13-18
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    • 1991
  • This experiment carried out to review influence of relative humidity, temperature and net weight on cigarette hardness for the uniformal control of cigarette quality. Obtained results are as follows: 1. The difference in the cigarette physical properties of constant hardness control is considerably lower than that of constant net weight control. 2. Contribution rate for cigarette hardness is relative humidity > net weight > temperature. 3. The multiple regression equation of cigarette hardness related with relative humidity, temperature and net weight is calculated as follows.

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An Experimental Study on the Characteristics of Compressive Strength in Cement Mortar under High Temperature conditions in an Early Age (초기 고온이력이 시멘트 모르터의 강도발현에 미치는 영향에 관한 연구)

  • Kim Young-Joo;Choi Maeng-Ki;Gong Min-Ho;Park Hee-Gon;Kim Kwang-Ki;Jung Sang-Jin
    • Proceedings of the Korean Institute of Building Construction Conference
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    • 2005.05a
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    • pp.45-48
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    • 2005
  • This study is basic experiment for estimating influence of strength by curing temperature of concrete's heat of hydration and estimate relationship of compressive strength development by initial curing temperature factor, and then asume temperature factor which influence compressive strength development and for showing basic document of qualify control. According to the result of cement mortar by the curing temperature factor high-curing temperature shows high strength on 3 day compare with low curing-temperature, shows higher strength than the piece of high curing temperature.

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