14/08/2026
❄️ CHILLER HEAT LOAD CALCULATION ❄️
Determining the Required Cooling Capacity of a Chiller
The basic objective of chiller heat-load calculation is to determine the required cooling capacity in TR or kW for an HVAC system.
🔹 1. BASIC FORMULA – CHILLED WATER SYSTEM
Q = m × Cp × ΔT
Where:
• Q = Cooling Capacity (kW)
• m = Chilled-Water Flow Rate (kg/s)
• Cp = Specific Heat of Water = 4.186 kJ/kg·K
• ΔT = CHW Temperature Difference (°C)
🔹 2. CONVERSION TO TR
1 TR = 3.517 kW
TR = Q (kW) ÷ 3.517
📌 Example:
Chilled Water Flow = 100 m³/hr
CHW Inlet Temperature = 12°C
CHW Outlet Temperature = 7°C
ΔT = 5°C
Cooling Load = 100 × 1.163 × 5 = 581.5 kW
TR = 581.5 ÷ 3.517 ≈ 165.3 TR
✅ Required Chiller Capacity ≈ 165 TR
🔹 3. MAJOR COMPONENTS OF HVAC HEAT LOAD
🏢 Building Transmission Load
• Walls • Roof • Glass/Windows • Doors
☀️ Solar Heat Gain
• Windows/Glazing • Roof • External Walls
👥 Occupancy Load
• Sensible Heat • Latent Heat
💡 Lighting Load
⚙️ Equipment Load
• Motors • Computers • Machines • Appliances
🌬️ Fresh Air / Ventilation Load
🚪 Infiltration Load
🌀 Duct Heat Gain
🔧 Pump & Fan Heat
📈 Safety / Design Margin
A proper heat-load calculation helps in selecting the right chiller capacity, improving energy efficiency and avoiding over-sizing or under-sizing.
🏭 KIRAN GROUP OF INDUSTRIES
Kiran Air Engineering & Technology
Kiran Equipments Industries
Adi Industries
🔹 HVAC / MEP PROJECTS
Chiller Sales • Manufacturing • Installation • AMC • Services
📍 Indore, Madhya Pradesh, India
✉️ [email protected]
📱 WhatsApp: +91-9691970700
