Properties Of Gas And Principles Of Combustion Flashcards
1
Q
Caloric value of nat gas, propane and butane
A
1000Btu
2500Btu
3200Btu
2
Q
Combustion means
A
The rapid oxidation of fuel accompanied by the production of heat or heat and light.
3
Q
The theoretical combustion uses what air
A
Primary and secondary
4
Q
What % of primary air is needed in theoretical air
A
40-65%
5
Q
Seldom theoretical air uses all the O2, so what is needed to achieve combustion, and how much do you need of it .
A
Excess air 40%
6
Q
What is controlled combustion
A
Takes place when fuel and air are supplied at proper rates to assure complete combustion.
7
Q
What is uncontrolled combustion
A
If a gas/air mixture is not ignited the moment it begins to flow from a burner, gas accumulates. “Delayed ignition”
8
Q
Air to gas ratio of nat gas, propane and btu
A
10:1
24:1
30:1
