• Title/Summary/Keyword: Interior Temperature

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Thermal Comfort Condition of Temperature and Humidity in Loess Interior Space

  • Kong, Sung-Hoon
    • Biomedical Science Letters
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    • v.10 no.2
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    • pp.129-135
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    • 2004
  • The study was carried out through measuring the temperature and humidity of the indoor/outdoor space and the distribution of interior thermal condition, and investigating the effect of loess materials on human body. The purpose of this study is to analyze the change of dry bulb temperature and relative humidity and correlation of thermal reaction of human body with ASHRAE (American Society of Heating, Refrigerating and Air-conditioning) comfort chart in the loess interior space. In the view point of biomedical sciences, loess interior space provides optimum thermal conditions for human thermal sensation.

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A Numerical Study on Automobile Interior Environment (자동차 실내 환경에 관한 수치적 연구)

  • Lee, Kum-Bae;Jean, Hee-Ho;Ko, Seok-Bo
    • Proceedings of the SAREK Conference
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    • 2006.06a
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    • pp.325-330
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    • 2006
  • Modern people spend more and more time in an automobile in their daily life. In this life, drivers and passengers should create HVAC environment in the automobile interior which is not only for convenient transportation but also give comfortable feeling with dwelling culture. Also, the latest cars give much importance for the role of HVAC system that controls the environment of the area for passengers more than just basic capability. There are solar radiant heat, surface temperature, refrigeration system(temperature, humidity, air current, velocity), and dust for the factor which have an effect on the HVAC environment in the automobile interior, also these are being carried for the HVAC environment delivered an individual character. In this study, we drew the automobile interior as three dimension and arranged a method of numerical analysis on HVAC environment in the automobile interior displaying air current distribution and temperature distribution through simulation of the automobile interior on the ventilation volume and outlet area. The aim of this study is to develop the estimated method for HVAC environment. in the automobile interior.

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Change in the Concentration of Fine Particles, Temperature, and Relative Humidity as Affected by Different Volume Ratios of Interior Greening in Real Indoor Space (실내녹화 부피비율이 실공간의 미세분진농도, 온도 및 상대습도에 미치는 영향)

  • Ju, Jin-Hee
    • Journal of the Korean Society of Environmental Restoration Technology
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    • v.13 no.2
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    • pp.1-7
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    • 2010
  • The study objective was to compare the interior greening volume ratios for the change in concentration of fine particle, temperature and relative humidity, and to identify the level of interior landscape volume ratio as a suitable condition to achieve the desired indoor properties. Plants were moved into a room (88m3) randomly. After moving, the volume ratio of the interior greening level was set at 0%, 1%, 2% and 3%. The concentration of fine particles was measured with a mini-volume portable air sampler (Air Metrics, USA). The temperature and relative humidity were recorded with a digital sensor (Kiwi-LTH, USA) during the experiment under different volume ratios with three replications. 1. The results of the change in concentration of the fine particles revealed a trend towards an increased volume ratio of interior greening with decreasing concentration of fine particles, compared to non-plants (0%). The concentration of fine particles at volume ratios of 0%, 1%, 2% and 3% was 55ug/$m^3$, 233ug/$m^3$, 40ug/$m^3$ and 30ug/$m^3$, respectively. 2. The change in temperature, at volume ratios of 0%, 1%, 2% and 3% was $21.2^{\circ}C$, $17.4^{\circ}C$, $16.7^{\circ}C$ and $18.9^{\circ}C$, respectively, in near interior greening, and $22.1^{\circ}C$, $18.7^{\circ}C$, $18.4^{\circ}C$ and $20.5^{\circ}C$ respectively, at a distance of 3m from the interior greening. These study results suggested that temperature was affected by volume ratio and distance from the interior greening. 3. The relative humidity, at volume ratios of 0%, 1%, 2% and 3% was 34.2%, 32.5%, 36.7%, and 46.9%, respectively, in near interior greening, and 31.2%, 26.9%, 31.4% and 38.3%, respectively, at a distance of 3m from the interior greening. With increasing volume ratio of interior landscape, there were positive and significant results between the distance difference and the relative humidity more than temperature.

Construction Example on the Interior and Exterior of Building utilizing UHPC for Premix Type Room Temperature Curing (프리믹스형 상온양생용 UHPC를 활용한 건축물 내·외장 시공 사례)

  • Choi, Byung-Keol;Yoon, Ju-Yong;Ko, Hyo-Jin;Park, Yong-Kyu;Yoon, Gi-Won
    • Proceedings of the Korean Institute of Building Construction Conference
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    • 2019.05a
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    • pp.143-144
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    • 2019
  • This study introduces the production and construction of building interior and exterior materials using UHPC for premix type room temperature curing developed through advance research and development.

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An Experimental Research on the Features of Interior Materials under High Temperature - Focusing on Gypsum Boards - (온도 상승에 따른 내부 조직 특성에 관한 실험적 연구 -석고보드를 중심으로-)

  • 김광기;박선길;김우재;임남기;송병창;정상진
    • Proceedings of the Korea Concrete Institute Conference
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    • 2003.05a
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    • pp.305-310
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    • 2003
  • Recently, gypsum boards are widely used as interior finishing boards for constructions because of their features of absorbing heats and little temperature rising at the early stage of fire. Therefore, in this research, basic data were suggested to secure fireproof stability by investigating interior processing features, which change together with the backside temperature of test materials from Flash Over (within 30 minutes after firing), at which temperature reaches its highest point, to survey the features of materials due to rising temperature in the chase of gypsum boards (general and fireproof gypsum boards)

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Theoretical Analysis of Ignition of a Coal-Water Slurry Droplets with Interior Temperature Distribution (내부 온도분포를 고려한 Coal-Water Slurry의 점화현상에 관한 이론적 해석)

  • Choi, C.E.;Baek, S.W.;Kim, J.W.
    • Transactions of the Korean Society of Mechanical Engineers
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    • v.17 no.7 s.94
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    • pp.1823-1832
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    • 1993
  • CWS(coal-water slurry) is used for application in power plants, boilers, industrial furnaces. A single coal-water slurry droplet ignition has been examined to reveal the basic nature of their evaporation, volatilization and heating processes. The interior droplet temperature distribution has been considered. The effect of coal thermal conductivity, droplet size, water fraction in the slurry, gas temperature and velocity and radiation on the ignition phenomena were also studied. Either increasing the velocity and gas temperature or decreasing the droplet size and water fraction in the slurry may reduce the time for evaporation and ignition delay time.

FLOW AND TEMPERATURE ANALYSIS WITHIN AUTOMOBILE CABIN BY DISCHARGED HOT AIR FROM DEFROST NOZZLE

  • Park, W.G.;Park, M.S.;Jang, K.L.
    • International Journal of Automotive Technology
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    • v.7 no.2
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    • pp.139-143
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    • 2006
  • As an automobile tends to be high grade, the needs for more luxurious interior and comfortable HVAC system are emerged. The defrosting ability is another major factor of the performances of HVAC system. The present work is to simulate the flow and the temperature field of cabin interior during the defrost mode. The three-dimensional incompressible Navier-Stokes equations and energy equation were solved on the multi blocked grid system by the iterative time marching method and AF scheme, respectively. The present computations were validated by the comparison of the temperature field of a driven cavity and velocity field of 1/5 model scale of an automobile. Generally good agreements were obtained. By the present computation, the complicated features of flow and temperature within the automotive cabin interior could be well understood.

A study of Heat Transfer by the Finite Element Method - Around Square Heat Source - (유한요소법에 의한 열전달 연구 -4각열원 주위-)

  • 장재은
    • Journal of the Korean Society of Safety
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    • v.13 no.1
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    • pp.26-33
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    • 1998
  • This paper subdivided the interior solid into triangular shape of equal size to calculate the temperature distribution around the square heat source of it, and compared calculated values with measured ones. The result obtained are as follows. 1) It was found that we can calculate the temperature distribution around the square heat source of interior solid by the variational method of the finite element method as the calculated values were almost accord with the measured ones. 2) The temperature distributed were higher when the distances between heat source were farther and lower when those nearer. 3) Vertical surface temperature distribution is remarkably efficient by thermal conductivities.

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Flow and Heat Transfer Analysis for the Ventilating System in Automobile Interior with a Forced Exhaust (강제배기를 수반한 자동차 실내의 환기시스템에 대한 유동 및 열전달 해석)

  • Lee Sang-Ho;Moh Jeong-Hah
    • Transactions of the Korean Society of Mechanical Engineers B
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    • v.29 no.4 s.235
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    • pp.469-476
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    • 2005
  • Numerical modeling has been carried out to investigate the two-dimensional air flow in automobile interior with a forced exhaust close to main air inlet for typical ventilation modes. The characteristics such as streamlines and temperature fields in the passenger compartment room with the forced exhaust are analyzed with comparison of the cases without a forced exhaust. The simulation results show that air flow on the floor near the front seat is increased with the forced exhaust for all ventilation modes. Flow recirculation in the cabin is most active in mode 2 with a vertical suction inlet in comparison with other two modes. In particular, less time is taken for air temperature to reach the inlet temperature due to the forced exhaust for the ventilation modes. Finally, it could be predicted that ventilating air flow is much improved with the forced exhaust in the interior Modeling results in this study can be applied to the optimal design of automobile interior fur air ventilation system.

Study for the development of portable thermal comfort measurement tool for elderly (고령자 온열 쾌적감 간이 측정방법 개발에 관한 연구)

  • Bae, Chi-Hye;Lee, Hyeon-Jeong;Chun, Chung-Yoon
    • 한국태양에너지학회:학술대회논문집
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    • 2009.11a
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    • pp.15-20
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    • 2009
  • The purpose of this study is to develop of portable thermal comfort measurement tool for elderly. Using prediction expression of thermal comfort for elderly which derived at previous study, a field studies were conducted. The objects of this survey are old persons over 60 years old and total 296 (male:111 persons, female:145 persons) persons were measured. The actual thermal sensation was compared with predicted thermal sensation calculated with PMV model, and the results shows that there were no correlation between them. Also, appling cheek temperature and hand temperature were useful to predict thermal sensation of elderly people. Especially, predicted thermal sensation using cheek temperature were closely connected with actual thermal sensation of elderly and presented most similar trend to actual thermal sensation.

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