Heat Transfer & Thermal Calculators

Calculates steady one-dimensional heat flux and heat rate through a constant-area plane wall of up to six user-entered layers in series. It can use known wall-surface temperatures or bulk-fluid temperatures with user-entered film coefficients.

Calculates the log mean temperature difference for ideal parallel-flow or counterflow terminal temperatures, rates heat duty from user-entered U and area, or solves the required area for a user-entered duty. It is a thermal rating screen, not an exchanger-selection or mechanical-design tool.

Calculates signed steady heat transfer, heat transfer per length, and cylindrical interface temperatures for a pipe wall plus optional insulation, with outside convection alone or outside convection and long-wave radiation.

Calculates the uniform-body temperature after an elapsed time or the finite time to a reachable target under a constant convective environment, while explicitly screening the lumped-capacitance assumption with Bi = h(V/A)/k.

Evaluates or sizes ideal sensible, latent, or combined sensible-plus-latent thermal storage and calculates source-side charge energy, delivered energy, and charge/discharge durations.

Calculates signed diffuse-gray radiative exchange for an entered two-surface enclosure network or for a small surface in a large isothermal enclosure.