Flashcards in MEP & E - Chapter 1 - Thermal, Environmental and Comfort Concepts Deck (10)
The agitation or motion of atoms and molecules. Thermal energy in motion.
Properties of heat flow
Heat always flows from a substance at a higher temperature to a substance of lower temperature, raising the temperature of the lower temperature substance and lowering the temperature of the higher temperature substance.
Quantity of Heat (Symbol and How Measured)
BTU or joules
British thermal unit.
The amount of heat required to raise a pound of water from 59.5 degrees F to 60.5 degrees F at a constant pressure of standard atmospheric pressure.
One Btu is roughly equivalent to one lit wooden match
Btu = ? joules
1055 joules (J)
Btu = ? watt-hours
0.293 watt-hours (W-hr)
Btu = ? calories
252 calories (c)
one thousand Btu
one million Btu