Calculate the heat stored Btu/ft2 in a concrete floor 6” thick if the initial temperature of...
Calculate the heat stored Btu/ft2 in a concrete floor 6” thick if the initial temperature of the concrete is 60°F and the final temperature is 80°F
Homework Answers
the density of concrete average = 140 lbs
mass of concrete = density * thickness *area
thickness= 6 inch = 0.5 ft
mass/ft2= 140 *0.5 =70 lbs /ft2
specific heat of concrete =0.2 Btu/lb- oF
heat stored = mass *specific heat * change in temperature
= 70 * 0.2*(80-60)
= 280 Btu/ft2
properties of concrete taken can be cleary seen in image:
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