// multi-utility computation suite · offline · instant · precise
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sci.extrusion-cooking-SME Calculator
Calculates specific mechanical energy (SME) input per unit mass in food or polymer extrusion from motor torque and throughput: SME = N×T/(Q×η). SME for breakfast cereal extrusion: 100–200 kJ/kg — higher SME increases starch gelatinisation and product expansion ratio.
Inputs
Torque Nm
Rotational force (N·m) = force × perpendicular lever arm. Engine torque peaks at lower RPM; horsepower peaks higher.
Screw Speed Rpm
Rate of movement. 1 m/s = 3.6 km/h = 2.237 mph.
Throughput Kg Hr
Reference formula or conversion factor shown for context.
Motor Eff Pct
Useful output divided by total input, as a percentage. 100% is impossible due to losses (heat, friction, resistance).
Results
specific mechanical energy SME (kJ/kg)
Sample size or count used in the calculation.
mechanical power (kW)
Sample size or count used in the calculation.
net SME (corrected for efficiency)
Useful output divided by total input, as a percentage. True 100% efficiency is impossible — losses appear as heat. LEDs: 30–50%. Electric motors: 85–97%. Switching supplies: 85–95%.
SME = P / (Q × η)
Reference formula or conversion factor shown for context.
SME ranges
The difference between the maximum and minimum values.
functional effect
The type of mathematical function or operational classification determined by the calculation.