01. Building Physics modeling - Energy Modeling + Analysis
(energy analysis of a primary school building in Atlanta, Georgia) Academic work: MSc. Arch - High performance building
Shading Iteration
Shading parameters: North & South façade: No louvers East & West façade: No. of louvers - 3 Depth of louvers : 0.3m, angle - 0o EUI value : 53.603
Materials Iteration
Material parameters: Walls: stucco – 1IN stucco, gypsum board – ½ in. gypsum board, cavity: steel frame/cavity, gypsum board: Gypsum board – ½ in. CBES Roof: roof – roof membrane highly reflective, roof insulation: roof insulation[18] metal : metal decking. Window: U factor : 0.60 kBtu/h*ft2*F, SHGC: 0.35, S kylight U factor: 0.55 kBtu/h*ft2*F, S HGC: 0.40 Foundation: concrete: 6 in. normal-weight concrete floor, carpet: CP02 CARPET PAD EUI value: 53.615
Additional options: Solar Energy Utilizing PV Panels to harness incident solar radiation would help the project achieve the net zero target, the following is a sample calculation of possible energy reduction using PV Panels: Total Building Area = 73,958.83 ft2 Total Rooftop Area = 45,025.44 ft2 Classrooms Rooftop Area = 14,466.7 ft2
PV Panel Area = 1.179 * 1.05 = 1.238m2 = 13.326 ft2 Using 50% of the classrooms’ rooftop we get the following: # of PV Panels = 7233.35 / 13.326 = 542.8 ~ 540 PV Panels Power Output = 540 * 432 = 233,280 kWh/yr = 795,951.36 kBTU/yr EUI Reduction = 795,951.36 / 73,958.83 = 10.76 KBTU/ft2/yr Based on the building’s EUI = 34.093, utilizing half of the classrooms’ rooftop area would lower it to 23.33.
