Fuel Gases
List the three broad categories of fuel gasses
Natural, Liquid Petroleum, and Manufactured
How do gas furnaces ensure the production of a blue flame
The use of gas spuds and a manifold
What are the products of complete combustion of a hydrocarbon gas?
Water and carbon dioxide
If carbon monoxide is a product of a reaction resulting in combustion, what can be said about the combustion
The combustion was incomplete.
Natural gas is ___________ than air
lighter
What type of flame is characteristic of incomplete combustion?
Yellow flames
What are the products of incomplete combustion of a hydrocarbon gas?
Water, carbon dioxide, carbon (soot), carbon monoxide
Why is carbon monoxide production undesirable in furnace operation?
Carbon monoxide is toxic.
How was natural gas created?
Conversion of organisms into gas through pressure and heat
Compared to blue flames, yellow flames burn at a
_____________ temperature
lower
What is the furnace combustion air requirements.
Approximately 10 cubic feet of air per 1000 BTU for perfect combustion
What causes flue gas condensation?
The flue gas is cooled below the dewpoint of the combustion gas.
Why are LP gasses considered more hazardous than natural gas?
LP gas is heavier than air and tend to puddle in low areas; natural gas is lighter than air and tends to dissipate
Describe the two types of flames and their characteristics
Yellow and blue. Yellow, is from incomplete combustion, Blue, is from complete combustion
The three things necessary for combustion are:
Fuel, oxygen, and heat
Flue gas condensation can be prevented by
Using double wall vent.
The approximate heating value of propane is:
2,500 BTU per cubic foot
What part does heat play in combustion?
Heat is the catalyst of combustion