Calculator catalog
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Found 122 calculators
Linear thermal expansion
Calculates length change from linear thermal expansion.
Final length from thermal expansion
Calculates final length after a temperature change.
Thermal power from heat and time
Calculates thermal power from heat energy and time.
Heat from power and time
Calculates heat energy from power and time.
Celsius to kelvin
Converts Celsius temperature to kelvin.
Kelvin to Celsius
Converts kelvin temperature to degrees Celsius.
Celsius to Fahrenheit
Converts Celsius temperature to degrees Fahrenheit.
Fahrenheit to Celsius
Converts Fahrenheit temperature to degrees Celsius.
Celsius difference to kelvin difference
Converts a Celsius temperature difference to a kelvin difference.
Heating energy
Calculates heat energy from mass, specific heat, and temperature change.
Heat from mass, specific heat and temperature change
Calculates heat energy from mass, specific heat, and temperature change.
Temperature change from heat
Calculates temperature change from heat energy, mass, and specific heat.
Specific heat from heat
Calculates specific heat from heat energy, mass, and temperature change.
Heat capacity
Calculates heat capacity from mass and specific heat.
Heat from heat capacity and temperature change
Calculates heat energy from heat capacity and temperature change.
Latent heat energy
Calculates phase-change energy from mass and specific latent heat.
Specific latent heat from energy and mass
Calculates specific latent heat from heat energy and mass.
Two-stream mixing temperature
Calculates final temperature for adiabatic two-stream mixing from heat-capacity-rate balance.
Heat transfer through a wall
Calculates heat transfer rate through a flat layer.
Convection heat transfer
Calculates convection heat transfer rate from h, area, and temperature difference.
Heat flux from power and area
Calculates heat flux from heat-transfer rate and area.
Heat-transfer rate from flux and area
Calculates heat-transfer rate from average heat flux and area.
Thermal resistance from temperature difference and power
Calculates thermal resistance from temperature difference and heat-transfer rate.
Thermal resistances in series
Sums three thermal resistances connected in series in a simple heat-transfer model.
Overall heat transfer coefficient from area resistance
Calculates U-value as the inverse of total area-specific thermal resistance.
Heat transfer from temperature difference and resistance
Calculates heat-transfer rate from temperature difference and thermal resistance.
Straight-fin efficiency
Calculates efficiency of a constant-section straight fin with an adiabatic tip.
Fin effectiveness
Calculates the ratio of fin heat transfer to bare-base heat transfer.
Heat removed by a fin
Calculates heat-transfer rate removed by a straight fin with an adiabatic tip.
Nusselt number
Calculates Nu from supplied h, L, and k without a convection correlation.
Grashof number
Calculates Gr from user-supplied properties.
Rayleigh number
Calculates Ra = Gr*Pr.
Schmidt number
Calculates Sc = nu/D.
Sherwood number
Calculates Sh = km*L/D without a mass-transfer correlation.
Thermal Peclet number
Calculates Pe_t = vL/alpha.
Mass Peclet number
Calculates Pe_m = vL/D.
Conduction heat rate through a flat wall
Calculates conduction heat rate through a flat layer.
Conduction heat flux through a flat wall
Calculates conduction heat flux through a flat layer.
Flat-wall conduction thermal resistance
Calculates conduction thermal resistance of a flat layer.
Conduction heat rate through a cylindrical wall
Calculates radial conduction heat rate through a cylindrical wall.
Cylindrical-wall conduction thermal resistance
Calculates radial conduction thermal resistance of a cylindrical wall.
Convection heat rate
Calculates convection heat rate from h, area, and temperature difference.
Convection heat flux
Calculates convection heat flux from h and temperature difference.
Convection coefficient from heat rate
Calculates heat transfer coefficient from heat rate, area, and temperature difference.
Convection thermal resistance
Calculates convection thermal resistance from h and area.
Blackbody radiation heat rate
Calculates ideal blackbody radiation heat rate between two temperatures.
Gray-body radiation heat rate
Calculates gray-body radiation heat rate with emissivity.
Gray-body radiation heat flux
Calculates gray-body radiation heat flux.
Emissivity from radiation heat rate
Calculates emissivity from radiation heat rate, area, and temperatures.
Constant-pressure heat
Calculates heat from mass, cp, and temperature change at constant pressure.
Constant-volume heat
Calculates heat from mass, cv, and temperature change at constant volume.
Ideal-gas internal energy change
Calculates ideal-gas internal energy change from mass, cv, and temperature change.
Ideal-gas enthalpy change
Calculates ideal-gas enthalpy change from mass, cp, and temperature change.
Thermal efficiency
Calculates thermal efficiency as useful work output divided by heat input.
Carnot efficiency
Calculates ideal Carnot-cycle efficiency from cold and hot reservoir temperatures.
Work from pressure and volume change
Calculates constant-pressure work from pressure and volume change.
Polytropic process work
Calculates ideal-gas polytropic process work for n not equal to 1.
Ideal Otto cycle
Calculates ideal Otto-cycle efficiency from compression ratio and Îș.
Ideal Diesel cycle
Calculates ideal Diesel-cycle efficiency from compression ratio, cutoff ratio, and Îș.
Ideal Brayton cycle
Calculates ideal Brayton efficiency; an optional inlet temperature gives compressor-outlet temperature.
Simplified Rankine cycle
Calculates an ideal Rankine-cycle balance from manually entered enthalpies h1âh4.
Ideal gas pressure from mass
Calculates ideal-gas pressure from mass, specific gas constant, temperature, and volume.
Ideal gas volume from mass
Calculates ideal-gas volume from mass, specific gas constant, temperature, and pressure.
Ideal gas temperature
Calculates ideal-gas absolute temperature from pressure, volume, mass, and specific gas constant.
Ideal gas mass
Calculates ideal-gas mass from pressure, volume, specific gas constant, and temperature.
Ideal gas density
Calculates ideal-gas density from pressure, specific gas constant, and temperature.
Specific gas constant from molar mass
Calculates the specific gas constant from the universal gas constant and molar mass.
Counterflow LMTD
Calculates the log-mean temperature difference for a counterflow heat exchanger.
Parallel-flow LMTD
Calculates the log-mean temperature difference for a parallel-flow heat exchanger.
Heat exchanger LMTD
Calculates log-mean temperature difference from two positive temperature differences.
Heat exchanger heat rate from LMTD
Calculates heat exchanger duty from U, area, and log-mean temperature difference.
Heat exchanger heat duty from LMTD
Calculates auxiliary heat exchanger duty from U, heat-transfer area, and LMTD.
Heat exchanger area from duty
Calculates required heat-transfer area from duty, U, and LMTD.
Heat exchanger duty from mass flow
Calculates fluid heat duty from mass flow, specific heat, and temperature change.
Fluid outlet temperature from heat
Calculates fluid outlet temperature from inlet temperature, heat rate, mass flow, and specific heat.
Heat exchanger effectiveness
Calculates heat exchanger effectiveness as actual heat rate divided by maximum possible heat rate.
NTU from U, area and Cmin
Calculates number of transfer units from U, area, and minimum heat capacity rate.
Counterflow epsilon-NTU heat exchanger
Calculates effectiveness and heat rate for a counterflow heat exchanger from UA and heat capacity rates.
Parallel-flow epsilon-NTU heat exchanger
Calculates effectiveness and heat rate for a parallel-flow heat exchanger from UA and heat capacity rates.
Thermal resistances of layers in series
Sums thermal resistances of multiple layers connected in series.
Overall U-value from area resistance
Calculates simplified overall heat transfer coefficient as the inverse of total area-specific thermal resistance.
Insulation heat loss through a flat wall
Calculates indicative heat loss through a flat barrier from area, temperature difference, and thermal resistance.
Required insulation resistance
Calculates required thermal resistance from allowable heat loss, area, and temperature difference.
Required insulation thickness
Calculates required insulation thickness from thermal resistance, conductivity, and area.
Pipe insulation heat loss
Calculates heat loss through a cylindrical pipe insulation layer from radial conduction resistance.
Sensible cooling load
Calculates cooling power from mass flow, specific heat, and temperature change.
Cooling water flow rate
Calculates required cooling-water mass flow from cooling power, specific heat, and temperature change.
Cooling time by lumped capacitance
Estimates time to reach a target temperature with a simplified lumped-capacitance model.
Newton cooling temperature
Calculates object temperature after a time in a simplified Newton cooling model.
Cooling energy removed
Calculates removed heat energy from mass, specific heat, and temperature change.
Cooling power from energy and time
Calculates average cooling power from removed energy and time.
Refrigerator COP
Calculates refrigeration COP as cooling power divided by input power.
Refrigeration COP
Calculates auxiliary refrigeration COP as cooling power divided by compressor power.
Heat pump COP
Calculates heat pump COP as heating power divided by input power.
Carnot refrigerator COP
Calculates ideal Carnot refrigeration COP from absolute temperatures.
Carnot heat pump COP
Calculates ideal Carnot heat pump COP from absolute temperatures.
Refrigeration capacity from mass flow
Calculates refrigeration capacity from refrigerant mass flow and enthalpy difference.
Refrigerant mass flow from capacity
Calculates required refrigerant mass flow from refrigeration capacity and enthalpy difference.
Refrigeration cycle from four enthalpies
Calculates evaporator heat, compressor work, condenser heat, COP, and mass flow from four user-provided enthalpies.
Refrigeration superheat and subcooling
Calculates suction superheat and liquid subcooling from user-provided temperatures.
Tons of refrigeration to kW
Converts tons of refrigeration TR to cooling power in kW.
kW to tons of refrigeration
Converts cooling power in kW to tons of refrigeration TR.
Fuel energy from mass and LHV
Calculates fuel chemical energy from mass and user-provided lower heating value.
Fuel energy from volume and LHV
Calculates fuel energy from volume and user-provided volumetric heating value.
Fuel power from mass flow and LHV
Calculates chemical fuel power from mass flow and lower heating value.
Fuel mass flow from power and LHV
Calculates fuel mass flow required for a given chemical power and LHV.
Boiler efficiency
Calculates indicative efficiency as useful heat output divided by fuel energy input.
Fuel consumption from heat output
Calculates fuel mass needed for a given heat output, efficiency, and LHV.
Air required from air-fuel ratio
Calculates air mass from user-provided air-fuel ratio and fuel mass.
Excess air percentage
Calculates excess air percentage from actual and theoretical air mass.
Water heating energy
Calculates heat required to warm water from mass, specific heat, and temperature change.
Water evaporation energy
Calculates energy required to evaporate water from mass and user-provided latent heat of vaporization.
Wet steam enthalpy
Calculates wet steam specific enthalpy from saturated-liquid enthalpy, vaporization enthalpy, and quality.
Steam quality from enthalpy
Calculates steam quality from specific enthalpy and user-provided saturation data.
Steam quality after throttling
Calculates outlet quality for isenthalpic throttling using user-provided saturation data.
Flash steam fraction
Calculates flash steam fraction from liquid enthalpy difference and outlet latent enthalpy.
Steam power from mass flow and enthalpy drop
Calculates theoretical steam power from mass flow and enthalpy drop.
Steam mass flow from power and enthalpy drop
Calculates steam mass flow required for a given power and enthalpy drop.
Condensate recovery energy
Calculates recovered heat energy from the temperature difference between condensate and makeup water.
IAPWS-IF97 steam tables
Pure water and steam properties from IAPWS-IF97 equations for Regions 1-5, saturation, quality, inverse solvers, tables and charts.
Thermodynamic cycle analyzer
Interactive state, heat/work balance, power and efficiency analyzer for Otto, Diesel, Brayton, simple Rankine and reheat Rankine cycles.
Refrigerant database
Pure-refrigerant database with CoolProp critical and saturation data plus EPA environmental values where available.