Coolant Flow Calculator
Calculate the required coolant flow rate for your engine with our comprehensive calculator. Determine optimal cooling system performance based on engine specifications and operating conditions.
Step 1: Engine Specifications
Understanding Heat Rejection
Internal combustion engines typically reject 25-40% of their total energy output as heat through the cooling system. The exact percentage depends on engine design, efficiency, and operating conditions.
Step 2: Cooling Parameters
About Temperature Difference
The temperature difference (ΔT) is the temperature rise of coolant as it passes through the engine. A typical ΔT is 8-12°C for efficient heat transfer. Lower ΔT requires higher flow rates, while higher ΔT may indicate insufficient cooling.
Coolant Flow Results
Required Coolant Flow Rate
Engine Type Flow Rate Comparison
| Engine Type | Heat Rejection Factor | Required Flow Rate | Heat to Reject |
|---|
Cooling System Requirements
Coolant Flow Formula
Flow Rate = (Engine Power × Heat Rejection % × 0.7457) / (ΔT × 4.186 × Coolant Factor)
To calculate coolant flow rate: Convert engine HP to kW (×0.7457), multiply by heat rejection percentage, then divide by the product of temperature difference, water’s specific heat capacity (4.186 kJ/kg°C), and coolant-specific factor.
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