GATE 2026 AR — Architecture – Question 65
A 12000 m² mall’s annual energy shares are grid electricity 52%, diesel 30%, LPG 10%, solar 8%. Average monthly solar use is 10 MWh. Find annual building energy index in kWh/m²/year, as an integer.
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Correct answer: 115 to 125
Explanation
Annual solar energy is 10×12=120 MWh. Since this represents 8% of total energy, annual total is 120/0.08=1500 MWh=1500000 kWh. Divide by 12000 m² to obtain BEI 125 kWh/m²/year. Include every listed source when recovering the total, not only grid electricity.