Math Blocks — Add, Subtract, Multiply, Divide

Addition (+) — Monthly EB Bill

ఒక office floor యొక్క మూడు sections:

Section A = 35 people
Section B = 28 people
Section C = 32 people
Total     = 35 + 28 + 32 = 95 people

BMS example — total building energy:

Floor 1 meter = 450 kWh
Floor 2 meter = 380 kWh
Floor 3 meter = 520 kWh
Total         = 1,350 kWh → shown on energy dashboard

Subtraction (-) — Home Water Tank Consumption

Morning tank level = 85%
Evening tank level = 42%
Consumed today    = 85 - 42 = 43%

BMS example — filter differential pressure:

Pressure before filter = 250 Pa
Pressure after filter  = 180 Pa
Differential           = 70 Pa → if above 150 Pa → alarm: change filter

Multiplication (×) — Air Flow Calculation

Air velocity in duct = 4.5 m/s (from velocity sensor)
Duct cross-section area = 0.8 m² (fixed value)
Volume flow rate  = 4.5 × 0.8 = 3.6 m³/s

BMS దీనిని AHU design కు తగ్గట్టుగా correct airflow ను అందిస్తుందో లేదో verify చేయడానికి ఉపయోగిస్తుంది.

Division (÷) — Average Zone Temperature

Zone 1 = 23°C, Zone 2 = 25°C, Zone 3 = 24°C, Zone 4 = 26°C
Sum    = 98°C
Average = 98 ÷ 4 = 24.5°C → Used for chiller plant optimisation

ఒక faulty sensor మొత్తం system ను తప్పుగా నడిపించదు. నాలుగు sensors యొక్క average true floor temperature ను ఇస్తుంది.