Simulation Study on Cooling Effect of Thermally Activated Light Shelf (TALS) System

Kyu-Nam Rhee; Taeyon Hwang

doi:10.7836/kses.2021.41.6.039

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2021 Vol.41, Issue 6 Preview Page Next Page

Research Article

Simulation Study on Cooling Effect of Thermally Activated Light Shelf (TALS) System 열적으로 활성화된 광선반 시스템의 냉방 효과 시뮬레이션 연구

30 December 2021. pp. 39-50

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Abstract

A light shelf is commonly used to mitigate glare discomfort and overheating by preventing solar radiation from penetrating the indoor space. If the light shelf can be thermally activated, it can also be used for space cooling, particularly for the perimeter zone in buildings. In this study, a thermally activated light shelf (TALS) system was proposed, where the light shelf was integrated with a radiant cooling panel system. To examine the applicability of the TALS system, heat transfer simulations were conducted using the Physibel software. Based on the simulation results, the layer of TALS was determined to maximize cooling capacity at the lower panel surface while minimizing the lower surface temperature. Transient simulations were also conducted to evaluate the cooling effect of the TALS system during the summer season. Simulation results showed that the TALS system could reduce the average perimeter and interior zone temperature by 2.23°C and 2.19°C, respectively. With the TALS system, the maximum temperature was reduced by 3.2°C in both the perimeter and interior zones. It was found that the TALS system could effectively reduce the room air temperature, which could lead to cooling energy savings. The impact of the TALS system on cooling energy consumption needs to be investigated in future studies.

Keywords

Light shelf

TALS system

Radiant cooling

Daylighting

Cooling load

Physibel

키워드

광선반

TALS 시스템

복사냉방

자연채광

냉방부하

피지벨

References

Lim, Y. W. and Heng, C. Y. S., Dynamic Internal Light Shelf for Tropical Daylighting in High-rise Office Buildings, Building and Environment, Vol. 106, pp. 155-166, 2016. 10.1016/j.buildenv.2016.06.030

Ebrahimi-Moghadam, A., Ildarabadi, P., Aliakbari, K., and Fadaee, F., Sensitivity Analysis and Multi-objective Optimization of Energy Consumption and Thermal Comfort by Using Interior Light Shelves in Residential Buildings, Renewable Energy, Vol. 159, pp. 736-755, 2020. 10.1016/j.renene.2020.05.127

Mangkuto, R. A., Feradi, F., Putra, R. E., Atmodipoero, R. T., and Favero, F., Optimisation of Daylight Admission Based on Modifications of Light Shelf Design Parameters, Journal of Building Engineering, Vol. 18, pp. 195-209, 2018 10.1016/j.jobe.2018.03.007

Lee, H. W., Kim, D. S., and Kim, Y. S., Simulation Study on the Performance Evaluation of Light-shelf focused on the Depth of Space and the Dimensions and Angles of Light-shelf, Journal of Architectural Institute of Korea, Vol. 29, No. 3, pp. 335-344, 2013.

Kim, J. M., Lee, H. W., Seo, J. H., and Kim, Y. S., A Preliminary Study on Lighting Performance and Energy Savings of a PV-Attached Light Shelf, Journal of the Society of Air-conditioning and Refrigerating Engineers of Korea, Vol. 30, No. 8, pp. 376-387, 2018. 10.6110/KJACR.2018.30.8.376

Jang, M. W., Lee, H. W., Seo, J. H., and Kim, Y. S., A Study on the Application of the Prism Sheet to Improve the Daylighting Performance of the Light Shelf, Journal of the Society of Air-conditioning and Refrigerating Engineers of Korea, Vol. 30, No. 9, pp. 401-412, 2018. 10.6110/KJACR.2018.30.9.401

Jeon, G. M., Lee, H. W., Seo, J. H., and Kim, Y. S., Performance Evaluation of Light-Shelf based on Light Enviorment and Air Conditioner Enviorment, Journal of Korea Institute of Ecological Architecture and Environment, Vol. 16, No. 5, pp. 47-55, 2016. 10.12813/kieae.2016.16.5.047

Bahdad, A. A. S., Fadzil, S. F. S., Onubi, H. O., and BenLasod, S. A., Sensitivity Analysis Linked to Multi-objective Optimization for Adjustments of Light-shelves Design Parameters in Response to Visual Comfort and Thermal Energy Performance, Journal of Building Engineering, Vol. 44, 102996, 2021. 10.1016/j.jobe.2021.102996

Chaloeytoy, K., Ichinose, M., and Sasaki, R., Comparing the Occupants’ Comfort between Perimeter Zone and Interior Zone in Asian Office, In IOP Conference Series: Earth and Environmental Science, Vol. 294, No. 1, p. 012075, 2019. 10.1088/1755-1315/294/1/012075

Schiavon, S., Lee, K. H., Bauman, F., and Webster, T., Influence of Raised Floor on Zone Design Cooling Load in Commercial Buildings, Energy and Buildings, Vol. 42, No. 8, pp. 1182-1191, 2010. 10.1016/j.enbuild.2010.02.009

Ning, B., Chen, Y., Liu, H., and Zhang, S., Cooling Capacity Improvement for a Radiant Ceiling Panel with Uniform Surface Temperature Distribution, Building and Environment, Vol. 102, pp. 64-72, 2016. 10.1016/j.buildenv.2016.03.009

Shin, M. S., Rhee, K. N., Ryu, S. R., Yeo, M. S., and Kim, K. W., Design of Radiant Floor Heating Panel in View of Floor Surface Temperatures, Building and Environment, Vol. 92, pp. 559-577, 2015. 10.1016/j.buildenv.2015.05.006

Babiak, J., Olesen, B. W., and Petras, D., Low Temperature Heating and High Temperature Cooling: REHVA Guidebook, No. 7, 2007.

KSES (Korean Solar Energy Society), Climate Data of Seoul, Korea, 2015.

Jeong, K. B. and Choi, S. G., Cooling Energy Saving System using Solar Heat Protection Dvices, Journal of the Korean Solar Energy Society, Vol. 30, No. 3, pp. 108-11, 2010.

Information

Publisher :Korean Solar Energy Society
Publisher(Ko) :한국태양에너지학회
Journal Title :Journal of the Korean Solar Energy Society
Journal Title(Ko) :한국태양에너지학회 논문집
Volume : 41
No :6
Pages :39-50
Received Date : 2021-10-27
Accepted Date : 2021-11-05
DOI :https://doi.org/10.7836/kses.2021.41.6.039

Journal of the Korean Solar Energy Society ISSN:1598-6411(Print) 2508-3562(Online) 한국태양에너지학회 논문집

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