Question

How to calculate time to reach steady state heat transfer?

Answer 1

Explanation:

Heat transfer is the transfer of thermal energy from a body, at a high temperature, to another at a lower temperature. This transfer of thermal energy may occur under steady or unsteady state conditions. Under Steady state conditions the temperature within the system does not change with time.

Answer 2

Hey

Explanation:

simple heat transfer, time to reach equilibrium

Instead of the steady-state Newton's Law of Conduction, you need to use the following equation, which equates the convection cooling of the boudary surface to the internal energy of the system.

Q = hA(Ts-Tfs) = -c x density x V x dT/dt

where

Q = heat (W)

h = convection heat transfer coefficient (W/m^2-K)

Ts = surface temperature of the object (C or K)

T fs = free stream temperature of cooling fluid

c = specific heat of the object

density = density of the object (kg/m^3)

V = volume of object (m^3)

hope it helps uh