Answer:
a) Water flow convection coefficient
b) Temperature gradient in the wall,
c) Temperature gradient in the water,
Explanation:
Assumption: The flow is at steady state
At 400 K, steel has a thermal conductivity of,
Temperature at the bottom,
Temperature at the top,
Thickness of the stainless steel, L = 0.2 m
Film temperature of water,
a) Thermal conductivity of water at 305.5 K
b) Temperature gradient of steel,
Since steady state heat transfer is assumed, heat transfer by conduction equals heat transfer by convection
17.3 * A * 300 = h*A* (40 - 25)
h = 5190/15
h = 346 W/m²K
c) To calculate the temperature gradient in water, equate the heat transfer in both water and steel.
That is,
Where is the temperature gradient of water