llustrate the order of arrangement of bricks A and B
The inside wall of a furnace is at 2100oF and the outside wall is at 300oF. The wall of a furnace must be designed to transmit no more than 220 Btu/hr-ft2. Two types of bricks are available for construction:
TYPE A: k = 0.38 Btu/ hr-ft-R with an allowable maximum temperature of 1400oF
TYPE B: k = 0.98 Btu/ hr-ft-R with an allowable maximum temperature of 2300oF
Both types of bricks have the same dimensions (9” x 4.5” x 3”) but the cost for Type B brick is twice the cost of Type A brick.
Illustrate the order of arrangement of bricks A and B in the furnace wall (with thickness, estimated temperatures at the interface between walls A and B and at the interior and exterior surface, the transport area and direction of transfer included)
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