Example engineering calculations
Worked, unit-aware calculation worksheets across structural, mechanical, electrical and more. Open any example into your own workspace to edit and reuse.
39 examples found
Heat Loss through a Wall
Calculating heat loss through a wall
Heat Conduction Through a Wall
Steady-state conductive heat-transfer rate through a plane wall from Fourier’s law.
Sensible Heat for a Temperature Rise
Energy required to raise the temperature of a mass using its specific heat capacity.
Convective Heat Transfer Rate
Heat transfer rate from a surface to a moving fluid using Newton’s law of cooling.
Thermal Resistance of a Wall
Conductive thermal resistance of a plane wall layer, the building block of resistance networks.
Log Mean Temperature Difference (LMTD)
Effective temperature difference driving a heat exchanger from its terminal temperature differences.
Heat Exchanger Duty (U·A·LMTD)
Heat transfer rate of an exchanger from its overall coefficient, area and log-mean temperature difference.
Ideal Gas Law (Pressure)
Pressure of an ideal gas from amount, temperature and volume.
Carnot Efficiency
Maximum possible thermal efficiency of a heat engine operating between two temperatures.
Radiative Heat Transfer
Net or emitted thermal radiation from a surface using the Stefan–Boltzmann law.
Latent Heat of Phase Change
Energy needed to change the phase of a mass at constant temperature.
Heat Pump Coefficient of Performance
Ideal coefficient of performance of a heat pump between two temperatures.
Heat Rate from Mass Flow
Heat added to or removed from a flowing stream from its mass flow rate and temperature change.
Thermal Efficiency of an Engine
Thermal efficiency of a heat engine from work output and heat input.
Conductive Heat Flux
Heat flux through a material from its conductivity and temperature gradient.
Thermal Stress from Restraint
Stress induced in a fully restrained member by a temperature change.
Refrigerator Coefficient of Performance
Ideal coefficient of performance of a refrigerator between two temperatures.
Ideal Gas Density
Density of an ideal gas from pressure, temperature and molar mass.
Insulation R-Value
Thermal resistance per unit area (R-value) of an insulation layer.
Building Heat Loss (U-Value)
Steady heat loss through a building element from its U-value, area and temperature difference.
Wien’s Displacement Law
Peak emission wavelength of a hot body from its temperature.
Overall Heat-Transfer Coefficient
Overall U-value of a wall with convection on both sides and conduction through it.
Biot Number
Biot number comparing internal conduction to surface convection during transient heating.
Lumped-Capacitance Time Constant
Thermal time constant of a small body cooling by convection.