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39a if lighting load for a 10000 sqft building is...

Question: 39a if lighting load for a 10000 sqft building is...

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39A. If lighting load for a 10,000 Sq.ft. building is estimated at 1 Watt/SQ.ft., What will be the resulting heat generated by lighting in units of MBtu for 3,000 hours of lights on? 39B. How much heat (Btus) will be stored in a 100 sq.ft. concrete wall 1 ft. thick if it is warmed from 65 deg. F to 85 deg. F by exposure to sunlight? Mass will be 100 cu.ft. x 144 lb./cu.ft., or 14,400 lbs. Specific heat of concrete is 0.156.)

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