LED 방폭 조명 설계 및 조명 특성에 관한 연구

Abstract

In this study, the LED explosion-proof lighting was studied for the use of industrial hazardous areas. At first, explosion-proof theory and structure were examined and analyzed. In addition, 4 types of fixture design were executed, and then prototype of the luminaire was fabricated. Finally measured lighting and explosion-proof characteristics were analyzed. LED explosion-proof emergency exit lighting with flameproof enclosure using light guide panel(LGP) was designed and fabricated, and then lighting characteristics of the prototype were compared to those of the commercial products. The weight and interal volume of the designed prototype in this study were reduced 46% and 54%, respectively compared to commercial products. The measured average luminance of the prototype of LED explosion-proof emergency exit lighting was 400.5 cd/㎡. Using of LGP, the uniformity of light of the prototype was enhanced compared to that of the commercialized products and hence the visibility of pictogram was improved. The prototype of 150 W LED explosion-proof flood lighting luminaire with flameproof enclosure by flange connections was successfully developed with 8.5 kg of weight, 646 ㎤ of internal volume, 16,283 lm of luminous flux, 108 lm/W of luminous efficiency, 76 of CRI and 5,500K of CCT. The prototype satisfied the flameproof enclosure test. In addition, IP66 class of ingress protection, T5 class as 66.60 ℃ of surface temperature was satisfied. It was found that the 150W LED flood lighting luminaire with ‘Ex d ⅡB T5 Gb’ was successfully developed. 150 W LED non-sparking explosion-proof flood lighting was studied for the use of industrial hazardous areas of zone 2. The weight of the fabricated prototype was 5.0 kg. It was measured to be 20,250 lm of total luminous flux, 135 lm/W of luminous efficiency, 80 of CRI and 5,700K of CCT at 220 V and 0.682 A of applied voltage and current, respectively. It was satisfied the certification criteria for Ex nR explosion-proof characteristics by versatile tests such as ventilation restricted sealing test, IP66 class of ingress protection test and T6 class with surface temperature of 58.40 ℃. It was found that the 150W LED flood lighting luminaire with ‘Ex nR ⅡB T6 Gc’ was successfully developed. LED down light the with type of protection of intrinsic safety and optical radiation explosion-proof was studied for the use of industrial hazardous areas of zone 0. It was measured to be 564 lm of total luminous flux, 91 lm/W of luminous efficiency, 85 of CRI and 5,700K of CCT at 24 V and 0.240 A of applied voltage and current, respectively. It was satisfied the certification criteria for Ex op is explosion-proof characteristics by versatile tests such as optical irradiance test and T6 class with surface temperature of 36.20 ℃. Prototype of the LED down light was designed and developed to have ‘Ex op is ⅡB T6 Ga’ of explosion-proof level and 6 W class of power consumption. Finally, this study will be a general design guideline for LED explosion-proof lighting research. In addition, it seems to be of great help to the workers studying LED explosion-proof lighting.