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Both calculators run independently — change the inputs on either side to compare results.

Otto Cycle Internal Combustion Engine Calculator

Calculate the thermal efficiency and performance of a gasoline engine using Otto cycle thermodynamics. Ideal for students, engineers, and enthusiasts analyzing how compression ratio affects engine efficiency.

Compression Ratio

Fill in the required fields to see your result.

Thermodynamics

Heat Exchanger Effectiveness Calculator

Calculate the maximum possible heat transfer rate for a heat exchanger given fluid flow rates, specific heats, and inlet temperatures. Used when sizing or auditing industrial heat exchangers and HVAC coils.

Hot Fluid Inlet Temperature (°C)

Cold Fluid Inlet Temperature (°C)

Hot Fluid Mass Flow Rate (kg/s)

Cold Fluid Mass Flow Rate (kg/s)

Hot Fluid Specific Heat (J/kg·K)

Cold Fluid Specific Heat (J/kg·K)

Fill in the required fields to see your result.

Key differences

	Otto Cycle Internal Combustion Engine Calculator	Heat Exchanger Effectiveness Calculator
Category	Thermodynamics	Thermodynamics
Inputs required	1	6
Result	Otto Cycle Efficiency (%)	Maximum Heat Transfer Rate (W)
What it does	Calculate the thermal efficiency and performance of a gasoline engine using Otto cycle thermodynamics. Ideal for students, engineers, and enthusiasts analyzing how compression ratio affects engine efficiency.	Calculate the maximum possible heat transfer rate for a heat exchanger given fluid flow rates, specific heats, and inlet temperatures. Used when sizing or auditing industrial heat exchangers and HVAC coils.