• Title/Summary/Keyword: Lighting heat

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A CO2 Emission Reduction Method through Correlation Analysis of Design Parameters in Buildings (건축물 설계변수의 상관관계 분석을 통한 CO2 배출저감 방안)

  • Lee, Hyun-Woo;Chae, Min-Su
    • Journal of the Korean Solar Energy Society
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    • v.31 no.1
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    • pp.100-106
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    • 2011
  • This study proposes a $CO_2$ emission reduction method through correlation analysis of a sample building. First, energy saving factors of heating, cooling, lighting were determined for the correlation analysis and $CO_2$ emission contribution rate of the design parameters have been analyzed. Then optimal combination of each design parameter has been drawn. Heat transfer coefficient of walls and windows, air permeability, windows area ratio, and shading devices were selected as applicable energy saving factors of the sample building. Also computer simulation was conducted using experimental design by Orthogonal Arrays of the statistical method. And the contribution rate was estimated by Analysis of Variance-ANOVA. As a result, the $CO_2$ emission in heating was reduced to 51.9%; in cooling to 16.8%; and in lighting to 2% compared to the existing building. The majority of the reduction was presented by heating energy.

A Study on Environmental Standards of School Building (교사환경기준에 관한 연구)

  • Hong, Seok-Pyo;Park, Young-Soo
    • The Journal of Korean Society for School & Community Health Education
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    • v.1 no.1
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    • pp.11-43
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    • 2000
  • The purpose of this study was, through analyzing the previous researches, to grasp the present status of environment of school building(ESB), research the sundry records of each element and, through comparative analysis of the standard of ESB in Korea, the United States, and Japan, select the normative standard of ESB, to clarify the point at issue presented in Regulation of Construction & facility Management for Elementary and and Secondary School in Korea, and to suggest an alternative preliminary standard of ESB. To carry out a research for this purpose, these were required: 1. to investigate the existing present status of ESB, 2. to make a comparative analysis of the standard of ESB in each country, 3. to suggest the normative standard of preliminary standard of ESB, 4. to analyze the controversial points of the standard of ESB in Korea, 5. to suggest an alternative preliminary standard of ESB. The conclusions were as follows: 1. Putting, through analyzing the previous researches, the existing present status of ESB together, it seemed that lighting environment, indoor air environment and noise environment were all in poor conditions. 2. In the result of a comparative analysis of the standard of ESB in Korea, Japan and the United States, in Korea the factors of each lighting and indoor air environment were not presented properly, in Japan, in lighting environment aspect, the standard on natural lighting and the factors on brightness were not presented., and in the USA the essential factors of each environment were throughly presented. In the comparison of the standards on each factor, Korea showed that the standard level presented was less properly prescribed than those of the USA and Japan but it also showed that the standard levels prescribed in the USA and in Japan were mostly similar to the standard levels in records investigated. 3. With the result of the normative standard selection on School Builiding environment factor of prescribed in this study, the controversial points of the standard of ESB in Korea were analyzed and the result was utilized to suggest new preliminary standard of ESB. 4. As the result of the analysis of the controversial points of the standard of ESB in Korea, it was found that the standard of ESB in Korea should be established on a basis of School Health Act and be concretely presented in School Health Regulation and School Health Rule. The factors of each environment was improperly presented in the existing standard of ESB in Korea. Moreover the standard of them was inferior to that of the records investigated and those of in the USA and in Japan and it also showed that the standard of it in Korea was improper to maintain Comfortable Learning Environment. 5. A suggested preliminary standard of ESB acquired through above study as follows: 1) In this study a new kind of preliminary standard of ESB is divided into lighting environment, indoor air environment, noise environment, odor environment and for above classification, reasonable factor and standard should be established and the controling way on each standard and countermeasures against it should be considered. 2) In lighting environment, the factors of natural lighting are divided into daylight rate, brightness, glare. In the standard on each factor, daylight rate should secure 5% of a mean daylight rate and 2% of a minimum daylight rate, brightness ratio of maximum illumination to minimum illumination should be under 10:1, and in glare there should not be an occurrence factor from a reflector outside of the classroom. And the factors of unnatural lighting are illumination, brightness, and glare. In the standard on each factor, illumination should be 750 lux or more, brightness ratio should be under 3 to 1, and glare should not occur. And Optimal reflection rate(%) of Colors and Facilities of Classroom which influences lighting environment should be considered. 3) In indoor air environment factors, thermal factors are divided into (1) room temperature, (2) relative humidity, (3) room air movement, (4) radiation heat, and harmful gases (5) CO, (6) $CO_2$ that are proceeded from using the heating fuel such as oval briquettes, firewood, charcoal being used in most of the classroom, and finally (7) dust. In the standard on each factor, the next are necessary; room temperature: $16^{\circ}C{\sim}26^{\circ}C$(summer : $E.T18.9{\sim}23.8^{\circ}C$, winter: $E.T16.7{\sim}21.7^{\circ}C$), relative humidity: $30{\sim}80%$, room air movement: under 0.5m/sec, radiation heat: under $5^{\circ}C$ gap between dry-bulb temperature and wet-bulb temperature, below 1000 ppm of ca and below 10ppm of $CO_2$, dust: below 0.10 $mg/m^3$ of Volume of dust in indoor air, and ventilation standard($CO_2$) for purification of indoor air : once/6 min.(about 7 times/40 min.) in an airtight classroom. 4) In the standard on noise environment, noise level should be under 40 dB(A) and the noise measuring way and the countermeasures against it should be considered. 5) In the standard on odor environment, odor level under Physical Method should be under 2 degrees, and the inspecting way and the countermeasures against it should be considered.

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펜던트형 감성조명 LED 등기구 모듈개발

  • Seo, Dong-Won;Kim, Yeong-Geun;Kim, Jin-Sa;Kim, Geum-Taek;Choe, Un-Sik;Song, Min-Jong;Song, Myeong-Hyeon;Park, Chun-Bae
    • Proceedings of the Korean Institute of Electrical and Electronic Material Engineers Conference
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    • 2009.11a
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    • pp.264-264
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    • 2009
  • The sensitivity lighting of pendant type used Micro-controller AVR, embodiment method for Munsell chromaticity diagram system and adoption method for light source lens respectively. About a plan design of light fixture, LED circuit designed flow chart of circuits and LED driver of organizations in electron device. For used Solidworks soft ware program, LED light source must take a heat shink part and LED light fixture module for sensitivity lighting of pendant type into considerations

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Influence of the Variations of Functional-Interior Factors on Study-rooms in Apartment (공동주택의 공부방에 대한 기능성 인테리어 요소 구현과 영향 분석)

  • Kim, Sang-Min;Kim, Soo-Young
    • Korean Journal of Air-Conditioning and Refrigeration Engineering
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    • v.22 no.5
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    • pp.314-321
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    • 2010
  • This study examines the influence of functional interior factors on the variation of indoor environment to propose proper elements for planning studyrooms. Several factors that should be included in planning stages of the rooms are discussed to apply appropriate conditions for a pilot study. Field measurements and survey were performed in actual apartment buildings. The influence of lighting, thermal and acoustical conditions on comfort levels were examined.

Development of Multi-purpose Smart Sensor Using Presence Sensor (재실 감지 센서를 이용한 다용도 스마트 센서 개발)

  • Cha, Joo-Heon;Yong, Heong
    • Journal of the Korean Society of Manufacturing Technology Engineers
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    • v.24 no.1
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    • pp.103-109
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    • 2015
  • This paper introduces a multi-purpose smart fusion sensor. Normally, this type of sensor can contribute to energy savings specifically related to lighting and heating/air conditioning systems by detecting individuals in an office building. If a fire occurs, the sensor can provide information regarding the presence and location of residents in the building to a management center. The system consists of four sensors: a thermopile sensor for detecting heat energy, an ultrasonic sensor for measuring the distance of objects from the sensor, a fire detection sensor, and a passive infrared sensor for detecting temperature change. The system has a wireless communication module to provide the management center with control information for lighting and heating/air conditioning systems. We have also demonstrated the usefulness of the proposed system by applying it to a real environment.

Nitride Phosphors for the Better Performance of WLEDs

  • Yoon, Chul-Soo
    • 한국정보디스플레이학회:학술대회논문집
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    • 2009.10a
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    • pp.49-49
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    • 2009
  • Phosphors with oxide host material, YAG:$Ce^{3+}$ and $(Ca,Sr,Ba)_2SiO_4:Eu^{2+}$ yellow phosphor, has been used for LED applications. The WLEDs using these phosphors are widely used for LCD backlighting, automobile, and general lighting applications since they have high conversion efficiency and good thermal and chemical stability which can meet necessary life time of LED products up to now. With advances of LED chip technology, the external quantum efficiency and driving current in chip get higher so that the phosphors for high power chip are required to maintain high conversion efficiency and stability at high temperature due to the heat dissipated from LED chips. In addition, higher color rendering index of LED lighting and color reproducibility of LCD than those of LEDs with single yellow phosphors are required. In order to overcome these technical issues rising from evolution of LED technology, new phosphors are in demand and nitride phosphors, one of the promising new candidate materials, will be discussed here.

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Considering about lighting for concrete main structure using LED (LED를 이용한 등대 표체 경관조명에 관한 고찰)

  • Han, Ji-Ho
    • Proceedings of the Korean Institute of Navigation and Port Research Conference
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    • 2009.06a
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    • pp.538-539
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    • 2009
  • The light of lighthouse as aids to navigation has been using filament with incandescent bulb so heat is being changed to light. More and More, LED leading lights, LED lantern, LED concrete main structure, LED bulb which have advantages of low power consumption and longer durability, what we call radiating diode, will lead the market in few years.

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A Study on Energy Requirement Variation According to Energy Efficiency Rating Evaluation and Design Variable of Standard Design of Rural Houses (농촌주택표준설계도 에너지효율등급평가 및 설계변수에 따른 에너지소요량 변화에 관한 연구)

  • Park, Mi-Lan;Ryoo, Yeon-Su;Choi, Jeong-Man;Seo, Hye-Won
    • Journal of the Korean Institute of Rural Architecture
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    • v.19 no.2
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    • pp.9-16
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    • 2017
  • The study analyzed the heat losses and the building energy efficiency grade by the energy simulation using the ENERGY# and ECO2 programs for the three types of Standard design of rural houses. It was calculated the energy efficiency rating by the ECO2 program for the rural housing standard design, and the energy demand and the energy consumption by each factor were compared and analyzed. And it analyzed energy consumption by element of each house by ENERGY # program. As a result, first in the evaluation of the energy efficiency grade of buildings by the ECO2 program, the rating for primary energy requirement for the housing newly built by the standard design of rural house is expected to range from 2 to 4 with 189.3 to $238.7kWh/m^2.a$. Second, the energy loss of each part of standard design of rural housing occurs in the order of ventilation 39%, window 33%, outer wall 14%, roof 9%, bottom 5%, and energy loss through ventilation and window occurs more than 70%. Third, the most beneficial effects on the energy efficiency grade is obtained the lowest grade of all three types by 2 when the lowering of the window and door heat transmission rate and the lowering of the light density, and the heat exchange ventilation device is not installed. Fourth, in the standard design of rural housing, the energy demand is occupied by heating > hot water > lighting order, and the order of the weight is changed in order of heating > lighting > ventilation > hot water. Fifth, building energy efficiency assessment system needs to establish policy for fixing rural housing energy as a practical device to ensure energy performance and quality.

A Study on the Heat Dissipation of LED Streetlight Using PCM (PCM을 이용한 LED 가로등의 방열에 관한 연구)

  • Jung, Eui-Chan;Chang, Sung-Ho;Kang, Seoug-Wan;Kim, Min-Ho;Nho, Kwon-Hak;Lee, Young-Wook;Choi, Yu-Bok
    • Journal of Korean Society of Industrial and Systems Engineering
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    • v.33 no.4
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    • pp.79-84
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    • 2010
  • In recent years, conventional streetlight is replaced by LED streetlight to reduce power consumption dramatically and to maximize lighting effects. However the characteristic of power LED itself driven by high current to increase the illumination, we need to develop effective heat release device. This study suggests new concept of heat dissipation device using PCM (Phase Change Material) and shows an experiment results to investigate thermal effects of PCM.

A STUDY OH THE VARIATION OF INCANDESCENT LAMP CHARACTERISTICS BY MEANS OF THE SHAPE OF FILAMENT (필라멘트의 형상에 따른 백열전구 특성변화에 관한 연구)

  • Chee, Chol-Kon;Hoon, Seok-Chan
    • Proceedings of the KIEE Conference
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    • 1987.11a
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    • pp.263-266
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    • 1987
  • Generally an incandescent lamp is made in the bulb with a horizontal position filament. In this paper the position of filament was changed Into a vortical position. When the position of filament is changed into a vertical position, efficacy is increased and color rendering is somewhat improved. In this subject the heat loss by a filling gas is important. The heat loss by a filling gas was calculated theoretically. The results in an Incandescent lamp experiment can be analyzed through the heat loss by a filling gas. As a filling gas the mixture of argon and nitrogen is used. The variation of lamp characteristics by the shape of filament rill be considered. The change by filament position to a vortical position is required in the field of power consumption saving of lighting system.

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