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A 30 m x 30 m concrete floor slab is heated by 0.025 m diameter hot water pipes sunk beneath the floor surface and spaced 0.7 meterapart. The pipe centerlines are 0.075 m below the floor surface.the pipe wall temperature is 60C and the floor surface temperature is 20 C
The bottom of the slab is insulated.
Assume steady-state. Use k = 1.4 W/m-KSketch the steady-state heat flux pattern.
a) Apply the shape factor method to estimate the average heat transfer rate from the concrete floor into the room.
Determine the stress in a stay at a given temperature. A steel 'stay' of effective length 5m is fitted in between the walls of a ships refrigerated compartment when the temperature is 18 degrees centigrade.
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