Pipat CHAİWİWATWORAKUL, D. MATUAMPUNWONG, S. CHİRARATTANANON

Energy Saving Potential From Daylighting Through External Multiple-Slat Shaded Window in the Tropics

Sunlight is strong and skylight is voluminous in the tropics. External multiple horizontal slats are simple but effective to shade the direct sunlight from north- and south-facing windows of a building in a tropical region. The device still allows the skylight to pass through and offers comfortable viewing from the interior to the exterior scene. This paper presents technical results of an experimental and simulation study on the use of such device with windows. The paper demonstrates an optimization of energy benefit from using such device on appropriate size of and suitable type of the glazed window.

Keywords:

Daylighting; Glazing performance; Multiple-slat shading,

PDF

___

S. Chirarattananon, P. Chaiwiwatworakul, and S. Pattanasethanon, “Daylight availability and models for global and diffuse horizontal illuminance and irradiance for Bangkok”, Renewable Energy, vol. 26 (1), pp. 69-89, S. Chirarattananon, P. Chaiwiwatworakul, V.D. Hien, P. Rakkwamsuk, K. Kubaha, K, “Assessment of energy savings from the revised building energy code of Thailand”, Energy, vol. 35 (4), 1741-1753, 2010.
H.H. Alzoubi, A.H. Al-Zoubi, “Assessment of building façade performance in terms of daylighting and associated energy consumption in architectural spaces: vertical and horizontal shading devices for southern exposure facades”, Energy Conversion and Management, vol. 51 (8), pp. 1592-1599, 2010.
C.L. Cheng, C.L. Chen, C.P. Chou, C.Y. Chan, “A mini- scale modeling approach to natural daylight utilization in building design”, Building and Environment, vol. 42 (1), pp. 372-384, 2007. P. Chaiwiwatworakul, S.
Rakkwamsuk, “Application of automated blind for daylighting in tropical region”, Energy Conversion and Management, vol. 50 (12), pp. 2927-2943, 2009. P.
P. Greenup, J.M. Bell, I. Moore, “The importance of interior daylight distribution in buildings in overall energy performance”, Renewable Energy, vol. 22 (1), pp. 52, 2001.
M. Bodart, A.D. Herde, “Global energy savings in offices buildings by the use of daylighting”, Energy and Buildings, vol. 34 (5), pp. 421-429, 2002.
A. Tzempelikos, A.K. Athienitis, “The impact of shading design and control on building cooling and lighting demand”, Solar Energy, vol. 81 (3), pp. 369-382, 2007.
A.C. Hviid, T.R. Nielsen, S. Svendsen, “Simple tool to evaluate the impact of daylight on building energy consumption”, Solar Energy, vol. 82 (9), pp. 787-798, V. Ferraro, N. Igawa, V. Marinelli, “INLUX-DBR - a calculation code to calculate indoor natural illuminance inside buildings under various sky conditions”, Energy, vol. 35 (9), pp. 3722-3730, 2010.
A. Nabil, J. Mardaljevic, “Useful daylight illuminance: a new paradigm for assessing daylight in buildings”, Lighting Research and Technology, vol. 37 (1), pp. 41-57, 2005.
A. Nabil, J. Mardaljevic, “Useful daylight illuminances: a replacement for daylight factors”, Energy and Buildings, vol. 38 (7), pp. 905-913, 2006.
V.D. Hien, S. Chirarattananon, “An experimental study of a façade mounted light pipe”, Lighting Research and Technology, vol. 41 (2), pp. 123-142, 2009. S. Chirarattananon, V.D. Hien, “Thermal performance and cost effectiveness of massive walls under Thai climate”, Energy and Buildings, vol. 43 (7), pp. 1655-1662, 2011.
V.D. Hien, S. Chirarattananon, “Triangular subdivision for the computation of form factors”, Leukos, vol. 5 (2), pp. 41-59, 2005.
R. Perez, P. Ineichen, R. Seals, “Modeling daylight availability and irradiance components from direct and global irradiance”, Solar Energy, vol. 44 (5), pp. 271-289,