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Step 1:
Burner Option
Selection
Eclipse RatioAir v1 Design Guide No. 115, 11/12/2008
Step 1 describes how to select burner options to suit an
application. Use the RatioAir Price List 115 and Datasheets,
Series 115 when following this selection process.
Caution:
Consult EFE-825 Eclipse Engineering Guide, or contact
Eclipse if you have special conditions or questions.
Burner Model / Size Selection
Consider the following when selecting the burner size:
•
Heat Input:
Calculate the required heat input to achieve
the required heat balance.
•
Power Supply Frequency:
power supply frequency (60Hz power).
•
Combustion Chamber Pressure:
that large or varying chamber pressures have on burner
performance.
•
Altitude:
The maximum burner capacity is reduced by
approximately 3% each 1000 feet (300 meters) above sea
level.
•
Combustion Air Supply:
(20.9% O
) and clean (without corrosives).
2
•
Combustion Air Temperature:
temperature can affect the burner capacity. The
combustion air supply temperature should not exceed
250°F.
•
Fuel Type:
Variation in calorific value and density will
affect burner performance.
Fuel Type
Fuel
Symbol
Natural Gas CH
90%+
4
Propane
C
H
3
8
Butane
C
H
4
10
BTU/ft
@ standard conditions (MJ/m
3
If using and alternative fuel supply, contact Eclipse with an accurate
breakdown of the fuel components.
Air Supply
When a standard RatioAir Version 1.0 burner is ordered, a
combustion air blower is supplied and mounted directly to the burner
body.
Combustor Type
Select a combustor type based on the application. Low temperature
applications use an alloy combustion tube. High temperature
applications use a silicon carbide (SiC) tube or a refractory block &
holder. For vertical down-firing applications with block and holder,
consult factory.
Burner capacity will vary with
Consider the effects
Combustion air should be fresh
Changes in air supply
Gross Heating Value
1000 BTU/ft
(40 MJ/m
)
3
3
2570 BTU/ft
(103 MJ/m
)
3
3
3250 BTU/ft
(130 MJ/m
)
3
3
@ normal conditions)
3
Specific Gravity
0.60
1.52
1.95
9
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