The concrete slab of a basement is

11m

long and

8m

wide, and

0.20m

thick. During the winter, temperatures are nominally

17\\\\deg C

and

10\\\\deg C

at the top and bottom surfaces, respectively. If the concrete has a thermal conductivity of 1.4

(W)/(m)K

, what is the rate of heat loss through the slab? If the basement is heated by a gas furnace operation at an efficiency of

90%

, and natural gas is priced at

$0.02

. MJ, what is the daily cost of the heat loss\ Answer:

Q_(Loss )=4.312kW

, COST

=$(8.28)/()

day

The concrete slab of a basement is 11m long and 8m wide, and 0.20m thick. During the winter, temperatures are nominally 17C and 10C at the top and bottom surfaces, respectively. If the concrete has a thermal conductivity of 1.4 W/mK, what is the rate of heat loss through the slab? If the basement is heated by a gas furnace operation at an efficiency of 90%, and natural gas is priced at $0.02. MJ, what is the daily cost of the heat loss. Answer: QLoss=4.312kW, COST =$8.28/ day