6'3 Using Heat

1
6.3 Using Heat

• Heating Systems- ________________________________-
  -warm homes and buildings
• Force Air System - most common, _________________
  ______________________________________________
• __________________________ - closed metal
  container that contains hot water or steam.
• Electric Heating system- _________________________
  _______________________________________________

2

• II. Solar Heating - ______________________________
  
• Passive solar heating - solar energy heats rooms
  inside a building, _______________________________
  ____ ____________________________________________
• Active solar heating - __________________________
  _____________________________________________

3
III. Using Heat to do work -heat engine -
____________________________________
_______________________________________________ -_
________________________________ - heat engine
where fuel is burned inside the engine in
chambers - e.g. auto -only 26 of the chemical
energy in fuel is converted to mechanical energy
-- _____________________________
_______________________________________________
4

• IV. Heat Movers - ________________________________
  _ ______________________________________________
  _____________________________________________
• Refrigerators - liquid coolant is changed to a
  gas, which cools inside where it absorbs thermal
  energy, gas pumped to a compressor where it
  changes to liquid and gives off heat, keeps
  cycling
• Air conditioners - ______________________________
  ______________________________________________
  ______________________________________________
• Heat pump - in warm weather operates like air
  conditioner, in cold weather reverses.
• Pg. 179 1-5