### Thermal conductance

Posted:

**Wed Feb 03, 2010 10:47 am**How does one convert

FROM

the rate of heat transfer

Q = BTU/hr (calculated from Q = -k * A * (T2 - T1)/x, where T2 < T1 (initially); x is the width of the conducting material, and A is the conduction area)

TO

the rate of temperature change

F/s, where F is degrees Fahrenheit and s is seconds.

The larger problem I'm trying to solve is:

Once a heat source of temperature T1 is applied to one side of a metal sheet of thickness x, how long does it take the other side of the sheet with initial temperature T2 < T1 to reach the same temperature T1?

Also, it seems there would be a way to convert the temperature T for a given volume of water to its heat content in BTU's? Does one have to know or assume an initial temperature T0?

Thanks in advance for your help

FROM

the rate of heat transfer

Q = BTU/hr (calculated from Q = -k * A * (T2 - T1)/x, where T2 < T1 (initially); x is the width of the conducting material, and A is the conduction area)

TO

the rate of temperature change

F/s, where F is degrees Fahrenheit and s is seconds.

The larger problem I'm trying to solve is:

Once a heat source of temperature T1 is applied to one side of a metal sheet of thickness x, how long does it take the other side of the sheet with initial temperature T2 < T1 to reach the same temperature T1?

Also, it seems there would be a way to convert the temperature T for a given volume of water to its heat content in BTU's? Does one have to know or assume an initial temperature T0?

Thanks in advance for your help