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Consider a hot-air heating system for a home. Examine the following systems for heat transfer.
(a) The combustion chamber and combustion gas side of the heat transfer area.
(b) The furnace as a whole, including the hot- and cold-air ducts and chimney.
Consider a hot-air heating system for a home. Examine the following systems for heat transfer.
(a) The combustion chamber and combustion gas side of the heat transfer area.
(b) The furnace as a whole, including the hot- and cold-air ducts and chimney.
(a) Fuel and air enter, warm products of the combustion exit, large -Q to the air in the duct system, small -Q loss directly to the room.
(b) Fuel and air enter, warm products exit through the chimney, cool air into the cold air return duct, warm air exit hot-air duct to heat the house. Small heat transfer losses from furnace, chimney and ductwork to the house.