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Steady-state heat transfer does not change with time - because - that is the definition of steady-state, i.e. "steady-state" means "does not change with time".

As for why heat transfer might be steady state - that would be a consequence of the driving forces and physical conditions remaining constant with time. For example:

Heat source remains the same temperature

Heat sink remains the same temperature

Heat source remain in the same position relative to each other, both in terms of distance and orientation.

Surface areas of heat source and heat sink remain the same.

Any intervening medium remains the same composition, temperature, density, and pressure.

If convection is occurring, flow rates remain constant.

If radiative heat transfer is occurring, any intervening medium has constant transmissivity, reflectivity, and absorbtion.

If radiative heat transfer is occurring, radiating and absorbing surfaces maintain constant radiative and absorbing properties.

There are a few other factors that can influence steady-state heat transfer, but these are a good description of the most important ones.

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11y ago
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12y ago

Steady state conditions are met when the ignition process has been shut off and furnace has been running for about one minute. When the steady state current is found set the anticipator to that current.

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15y ago

In steady state condition of heat transfer there is no temperature variation with time.

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Q: Why steady state heat transfer doesnot change with respect to time?
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