Sizing calculator

How do I size an oil cooler (heat rejection)?

The share of hydraulic power not converted to work becomes heat. Example: a 100 L/min, 200 bar system with 0.7 overall efficiency must reject 100×200×0.3/600 = 10 kW.

Φ [kW] = Q [L/min] × ΔP [bar] × (1−η) / 600

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Add 20–30% safety margin for continuous duty. EMMEGI HPA air-blast series covers up to ~120 kW.

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