Eclipse RatioMatic RM Series Design Manual - page 10
Eclipse RatioMatic v3.00 - Design Guide No. 110, 04/98
3-2
Step 1 describes how to select burner options to suit an
application. Use the RatioMatic Price List 110 and Data Sheets,
Series 110 when following this selection process.
Caution:
Consult EFE-825, Eclipse Combustion Engineering Guide, or
contact Eclipse Combustion 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. Burner capacity will vary
with power supply frequency (50Hz or 60Hz power).
•
Combustion Chamber Pressure. Consider the
effects 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. Combustion air should be
fresh (20.9% O
2
) and clean (without corrosives).
•
Combustion Air Temperature. Changes in air supply
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
Gross Heating Value
Specific Gravity
Natural gas
CH
4
90%+
1000 BTU/ft
3
0.60
1.52
1.95
(40 MJ/m
3
)
(103 MJ/m
3
)
(130 MJ/m
3
)
Propane
C
3
H
8
2570 BTU/ft
3
Butane
C
4
H
10
3250 BTU/ft
3
BTU/ft
3
@ standard conditions (MJ/m
3
@ normal conditions)
If using and alternative fuel supply, contact Eclipse Combustion
with an accurate breakdown of the fuel components.
Air Supply
When a standard RatioMatic Version 3.00 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.
Step 1:
Burner Option
Selection