광선반형 복사냉방패널 시스템의 냉방성능 평가 실증 연구
Experimental Study on the Cooling Performance Evaluation of a Thermally Activated Light Shelf System
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In this study, cooling performances were experimentally evaluated for a thermally activatedlight shelf (TALS), which was represented by integrating a light shelf with a radiant coolingpanel. A full-scale test-bed was constructed to evaluate the cooling performance of the TALS interms of the cooling energy and thermal environment. Three TALS alternatives were evaluated:the INS case wherein the insulation was filled in the TALS, the AIR case wherein the insulationwas replaced by an air cavity, and the FAN case wherein small DC fans were installed in theAIR case for the enhancement of air flow. The experimental results showed that the TALSprovides 11% ~ 51% additional cooling capacity of the fan coil unit (FCU) when it is utilized asan auxiliary cooling system for the FCU. It was found that the TALS can reduce the systemoperation time by 17.2 ~ 29.6% while it raises the chiller ΔT by up to 0.4 K, which implies apossible energy reduction due to the improved chiller efficiency. The cooling energy wasreduced by 1.3% for the INS case and 2.7% for the FAN case, whereas the cooling energy wasincreased by 6.9% for the AIR case, because the cooled cavity air was not successfully used forspace cooling. It was also deduced that the thermal environment can be improved, particularly atthe perimeter zone, because the TALS can lower the radiant temperature at the perimeter zone. The application of the INS and FAN cases is proposed to improve the energy performance aswell as the thermal environment in a building equipped with the TALS.
Abstract
In this study, cooling performances were experimentally evaluated for a thermally activatedlight shelf (TALS), which was represented by integrating a light shelf with a radiant coolingpanel. A full-scale test-bed was constructed to evaluate the cooling performance of the TALS interms of the cooling energy and thermal environment. Three TALS alternatives were evaluated:the INS case wherein the insulation was filled in the TALS, the AIR case wherein the insulationwas replaced by an air cavity, and the FAN case wherein small DC fans were installed in theAIR case for the enhancement of air flow. The experimental results showed that the TALSprovides 11% ~ 51% additional cooling capacity of the fan coil unit (FCU) when it is utilized asan auxiliary cooling system for the FCU. It was found that the TALS can reduce the systemoperation time by 17.2 ~ 29.6% while it raises the chiller ΔT by up to 0.4 K, which implies apossible energy reduction due to the improved chiller efficiency. The cooling energy wasreduced by 1.3% for the INS case and 2.7% for the FAN case, whereas the cooling energy wasincreased by 6.9% for the AIR case, because the cooled cavity air was not successfully used forspace cooling. It was also deduced that the thermal environment can be improved, particularly atthe perimeter zone, because the TALS can lower the radiant temperature at the perimeter zone. The application of the INS and FAN cases is proposed to improve the energy performance aswell as the thermal environment in a building equipped with the TALS.
참고문헌 (7)
- 이행우, "실내공간 깊이와 광선반 규격 변화에 의한 광선반 성능평가 시뮬레이션 연구", 대한건축학회논문집, 29(03), pp.335~344 (2013), 대한건축학회
- Lim, Y. W., "Dynamic Internal Light Shelf for Tropical Daylighting in High-rise Office Buildings", Building and Environment, 106, pp.155~166 (2016)
- 이규남, "열적으로 활성화된 광선반 시스템의 냉방 효과 시뮬레이션 연구", 한국태양에너지학회 논문집, 41(6), pp.39~50 (2021), 한국태양에너지학회[DOI]
- 이규남, "광선반 기능이 결합된 복사냉방 패널의 냉방용량 평가", 한국건축친환경설비학회 논문집, 16(3), pp.231~240 (2022), 한국건축친환경설비학회
- 최지수, "열적으로 활성화된 광선반 시스템에 의한 냉방 성능 개선 효과 분석", 한국건축친환경설비학회 논문집, 16(6), pp.581~591 (2022), 한국건축친환경설비학회
- Kim, S. Y., "Cooling Capacity Evaluation of Thermally Activated Light Shelf (TALS) Systems", Building and Environment, 235, pp.110214~ (2023)
- European Committee for Standardization, "EN14240: Ventilation for Buildings - Chilled Ceilings - Testing and Rating", ~ (2004)