calculator
Heat Transfer Rate Calculator
Estimate heat-transfer rate or total heat using energy-time, batch sensible heat, steady-flow sensible heat, and user-entered latent heat formulas.
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Thermal engineering calculators for heat-transfer rate, conduction, convection, radiation, heat exchangers, resistance networks, insulation, and fins.
Use ScholarTool thermal engineering utilities for heat-transfer rate, steady conduction, convection, radiation, LMTD, effectiveness-NTU, overall U, thermal resistance, critical insulation radius, and straight-fin workflows. Published tools keep absolute temperature and temperature difference separate, normalize values to SI internally, and explain assumptions and limitations.
10 tools
Published calculator entries in this category.
Estimate heat-transfer rate or total heat using energy-time, batch sensible heat, steady-flow sensible heat, and user-entered latent heat formulas.
Solve plane-wall, cylindrical-wall, spherical-shell, or direct-resistance conduction with unit normalization and heat-flow direction.
Use Newton's law of cooling to solve convection heat rate, heat-transfer coefficient, area, or temperature difference.
Estimate net thermal radiation heat transfer and equivalent linearized radiation coefficient with absolute-temperature handling.
Compute parallel-flow or counterflow LMTD, handle equal terminal differences, and apply a user-entered correction factor.
Estimate effectiveness, heat rate, qmax, capacity-rate ratio, and outlet temperatures using basic epsilon-NTU relationships.
Combine film coefficients, wall layers, fouling, and contact resistance into an overall heat-transfer coefficient.
Build a simple series or parallel thermal-resistance network and compute equivalent resistance and heat-transfer rate.
Estimate whether added insulation radius may initially increase heat loss for small cylinders or spheres.
Estimate straight rectangular or cylindrical pin fin performance using the standard adiabatic-tip corrected-length approximation.
The tools cover energy-rate balances, conduction, convection, radiation, heat exchangers, overall U, resistance networks, critical insulation radius, and fin efficiency.
The Stefan-Boltzmann relationship depends on the fourth power of thermodynamic temperature, so Celsius or Fahrenheit values must first be converted to kelvin or Rankine.
LMTD uses terminal temperature differences when they are known, while effectiveness-NTU relates exchanger conductance and heat-capacity rates when outlet conditions may be unknown.
Series resistances carry the same heat rate and add directly; parallel paths share a temperature difference and combine through conductance, provided nodes and areas are defined consistently.
No. It uses a supplied coefficient in Newton's law of cooling and does not derive h from a Nusselt-number correlation or CFD solution.
Below the critical radius, the increase in outer convective area can outweigh the added conduction resistance in the simplified model.
Use properties representative of the operating range, document the source and evaluation temperature, and use a more detailed method when variation is too large for a constant-property assumption.
No. They provide transparent preliminary relationships; multidimensional effects, transients, phase change, correlations, fouling, controls, and validated design checks may require specialist analysis.
Thermal Engineering Tools cover preliminary conduction, convection, radiation, heat-exchanger, thermal-resistance, insulation, and fin calculations. They do not provide certified thermal design.
Draw the heat path, set consistent temperatures and areas, choose properties at justified conditions, calculate the thermal balance, and compare limiting cases before using validated simulation or design standards.
Steady state, constant properties, one-dimensional transfer, ideal surface behavior, and correlation validity may limit a result. Phase change, contact resistance, multidimensional effects, and safety margins need explicit treatment.