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A passive solar house has a thermal capacity of 40 MJ/K. The thermal mass is heated to 20

A passive solar house has a thermal capacity of 40 MJ/K. The thermal mass is heated to 20

engineering   Mechanical-Engineering   
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Answer #1

take the averahe of 18 and 20 as 19

heat flux coming out of house is (19-10)K * 200 watts = 1800 joules per second.

time it can sustain is 40000000*2/1800 =44444.4 seconds = 12.3 hours

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Answer #2

Answer is 1 hr 48 minutes

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