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Step 1:
Burner Option
Selection
10
tep 1 describes how to select burner options to suit an
application. Use the RatioAir Price List 115 and Data heets,
eries 115 when following this selection process.
aution:
onsult EFE-825, Eclipse ombustion Engineering Guide, or
contact Eclipse ombustion if you have special conditions or
questions.
urner Model / Size Selection
onsider the following when selecting the burner size:
eat Input.
achieve the required heat balance.
ower Supply Frequency.
with power supply frequency (60Hz power).
ombustion hamber Pressure
effects that large or varying chamber pressures have on
burner performance.
ltitude.
he maximum burner capacity is reduced by
approximately 3% each 1000 feet (300 meters) above
sea level.
ombustion Air Supply.
fresh (20.9% O
ombustion Air Temperature.
temperature can affect the burner capacity. The
combustion air supply temperature should not exceed
250° F.
uel Type. ariation in calorific value and density will
affect burner performance.
uel Type
Fuel
Symbol
Natural gas CH
90%+
4
Propane
C
H
3
8
Butane
C
H
4
10
3
BTU/ft
@ standard conditions (MJ/m
f using and alternative fuel supply, contact Eclipse Combustion
with an accurate breakdown of the fuel components.
ir 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.
temperature applications use an alloy combustion tube. High
temperature applications use a silicon carbide (SiC) tube or a
refractor y block & holder.
applications with block and holder, consult factor y.
clipse RatioAir v1 - Design Guide No. 115, 2/14/05
Calculate the required heat input to
Burner capacity will vary
ombustion air should be
and clean (without corrosives .
hanges in air supply
Gross Heating Value
3
3
1000 BTU/ft
(40 MJ/m
)
3
3
2570 BTU/ft
(103 MJ/m
)
3
3
3250 BTU/ft
(130 MJ/m
)
3
@ normal conditions)
For ver tical down-firing
onsider the
Specific Gravity
0.60
1.52
1.95
Low
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