A room has a wall with an R value of 18 F sq.ft. hr/BTU. The room is 15 feet long and 11 feet wide with walls that are 9 ft high. On a parti

Question

A room has a wall with an R value of 18 F sq.ft. hr/BTU. The room is 15 feet long and 11 feet wide with walls that are 9 ft high. On a particular day the average outside temperature is 40 degrees F. How much heat is transferred through the walls on that day (in BTUs)?

in progress 0
Thiên Ân 2 months 2021-07-30T01:14:57+00:00 1 Answers 5 views 0

Answers ( )

    0
    2021-07-30T01:15:57+00:00

    Answer:

    The heat transferred through the wall that day is  13728 BTUs

    Explanation:

    Here, we have the area of the wall given as

    Area of wall = 2 × Length × Height + 2 × Width × Height

    Length = 15 feet

    Width = 11 Feet and

    Height = 9 feet

    Therefore, the area = 2×15×9 + 2×11×9 = 468 ft²

    Temperature difference is given by

    Average outside temperature – Wall temperature = 40 – 18 = 22 °F

    Therefore the heat transferred through the wall that day (24 hours) at 18 sq.ft. hr/BTU is given by;

    468 × 22 × 24/18 = 13728 = 13728 BTUs.

Leave an answer

Browse

Giải phương trình 1 ẩn: x + 2 - 2(x + 1) = -x . Hỏi x = ? ( )