Question

Guest

The composite wall separates the liquid at 200°C, with air at
40°C, with the fluid side convection heat transfer coefficient and
the air side of 10 W/m²K and 20 W/m²K, respectively. Wall
The composite consists of two materials, material A on the thick liquid side
10 mm, with k = 0.1 W/mK, and the material B on the air side is thick
20 mm, where k = 0.04 W/mK. Resistance of contactbetween materials A.
where B is R"t,c=0.3 m².K/W. If the walls are composite
measuring 2 m high and 2.5 m wide
a. Sketch the thermal circuit of the system, with and without resistance contact
b. Calculate the heat transfer rate of the composite wall if it is resisted
contacts count
c. Calculate the heat transfer rate of the composite wall if it is resisted contacts are ignored
d. Draw the temperature distribution on the composite wall, with and without contact resistance

heat transfer