Reducing Heat Gains and Cooling Loads Through Roof Structure Configurations of A House in Medan

HABITechno 3 International Conference

Lubis, Irma Handayani^1 ; Koerniawan, Mochamad Donny^2

Mundinglaya Street No.4., Lebak Siliwangi Coblong, Bandung

40132, Indonesia^1

Labtek XI B Gedung Arsitektur, Jalan Ganesha 10, Lebak Siliwangi Coblong, Bandung

40132, Indonesia^2

关键词: Building surface;    Coating material;    Heating load;    Overcast skies;    Passive design strategies;    Roof structures;    Solar heat gains;    Structure materials;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/152/1/012008/pdf
DOI  :  10.1088/1755-1315/152/1/012008

来源: IOP

【 摘 要 】

Heat gains and heat losses through building surfaces are the main factors that determine the building's cooling and heating loads. Roof as a building surface that has the most exposed area to the sun, contribute most of heat gains in the building. Therefore, the amount of solar heat gains on the roofs need to be minimized by roof structure configurations. This research aims to discover the optimization of roof structure configurations (coating material, structure material, inclination, overhang, and insulation) as one of passive design strategies that reduce heat gains and cooling loads of a house in Medan. The result showed that case four, white-painted metal roof combined with 45° roof pitched, 1.5m overhang, and addition of insulation, indicates the minimum heat gains production and the less cooling loads during clear sky day but not in the overcast sky condition. In conclusion, heat gains and cooling loads of a house in Medan could be diminished during clear sky day by the addition of roof coating with high reflectance low solar absorbtance, the slope roof, the extension of wider veranda, and the addition of insulation in the roof structure.