How do you calculate radiation heat transfer?

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Answer 1 · 2017-06-28T02:12:30

By Stefan–Boltzmann set of formulae.

The Stefan–Boltzmann law describes the power(energy) radiated from the ideally absorptive black body .

Transference of heat by emission and later absorption of electromagnetic radiation (via waves) between two bodies.

#Q = σ *T^4*A#

or

#Q= σA (T^4 1 -T^4 2)#

................................................................................................................................

Q = heat transfer per unit time (W)

The S.-B. constant: #σ = 5.6703 10^-8# #("W/"m^2*K^4")#

T = absolute temperature in Kelvin (K) :

T1= of the first object , T2= of the second object.

A = area of the emitting body#(m^2)#