Global 1120, Руководство по эксплуатации

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Global Power Technologies
1120 - Class I, Division 2, Group D, T3
Figure 13 Change in V
set
Vs Air Shutting Setting
2 .9 Air Shutter adjustment
This burner contains dual air shutters which control the amount of air used for combustion. See
Figure 10.
If too little air is used (fuel rich), combustion is incomplete and not all the energy in the fuel is
converted to heat.
If too much air is used (air rich), additional energy is required to heat the excess air to exhaust
temperature.
In both cases fuel is being wasted. When the air shutter is at its optimum setting (neither of
above) the TEG is operating at maximum efficiency.
NOTE: If available a combustion analyzer will facilitate rapid air shutter optimizing as you
need not wait for V
set
to change.
Figure 13 shows change in V
set
as a function of air shutter settings. Observe that V
set
decreases
more rapidly on the fuel rich side than on the air rich side. For this reason a fuel rich operation
is to be avoided.
Make initial adjustments of air shutters towards the fuel rich side by decreasing the air holes.
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