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) From the “Operating Range” chart in Data Sheet No. 160, the maximum
heat input at 0.7"w.c. air pressure drop is 800,000 Btu/hr/ft. The flame
length from the “Flame Length” chart in Data Sheet No. 160 is 30".
Burner length, feet = 6, 40,000 Btu/hr = 7.8 feet; round up to 8 feet.
800,000 Btu/hr/ft
3) Minimum: Btu/hr = 1.3 X 60,000 X 5 = 390,000 Btu/hr.
4) Minimum per foot = 390,000 Btu/hr = 48,750 Btu/hr/ft.
5) From the “Operating Range” chart in Data Sheet No. 160, the
minimum input at 0.7” w.c. is 0,000 Btu/hr/ft. Therefore, the
burner can operate over the desired input range.
ayout of the burner sections
Once the lineal feet of burner has been determined, use Figure 3.
and the criteria below to define the burner geometry.
For optimum burner performance and a uniform temperature profile,
even gas and air flow throughout the burner is essential. The following
guidelines should be used to lay out a burner:
1) Every leg of a Tee or Cross section must be separated from another
Tee or Cross section by at least 150mm (6") of burner.
) Include the proper number of gas feed inlet sections. Use Table 3.1
as a guide to the number and size of gas feed inlets required based
on the length of the burner.
as Feed Inlet Capacities
able 3. 1
Gas Inlet
Pipe Size Directon
1"
Side
300mm straight section
1-1/2"
Rear
300mm straight section, Cast Iron
1-1/2"
Side
300mm straight section
2"
Rear
300mm straight section, Aluminum
2"
Rear
300mm x 300mm cross section
2"
Side
300mm straight section
1"
Side
300mm straight section
1-1/2"
Rear
300mm straight section, Cast Iron
1-1/2"
Side
300mm straight section
2"
Rear
300mm straight section, Aluminum
2"
Rear
300mm x 300mm cross section
2"
Side
300mm straight section
* Number of feet or 300mm sections
Example:
six-foot burner for standard gas pressure will use 2"
N.P.T. rear inlets to supply gas. How many gas inlets are required?
Solution:
Each 2" back inlet can supply 4 feet of burner.
6/4
Therefore,
= 1.5, or 2 inlets are required
3) Space gas inlets equally to assure uniform gas distribution.
clipse AH-MA Air Heat Burner v2, Design Guide 160, 8/1/05
8 ft.
Section Type
Max. Burner
Gas
Length Per
Pressure
Inlet*
1
standard
standard
4
standard
3
standard
4
standard
6
standard
4
.5
Low
2
Low
1.5
Low
2
Low
6
Low
2
Low
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