Global Power Technologies
1120 - Class I, Division 2, Group D, T3
Figure 17
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3 .2 Power Unit: See Figure 16 .
The power unit is a solid state high reliability design that requires little maintenance. It produces
constant output power if the correct temperatures are maintained. See discussion in Theory of
Operation section 1.3.
Note: The correct temperatures will be maintained if:
a)
The fuel and air flow to burner are constant.
b)
The flow of cooling air to the fins is not obstructed.
The power unit assembly consists of cooling fins on one end, a hermetically sealed thermoelec-
tric pile in the middle and a combustion chamber on the other end which accepts the burner
assembly.
3 .3 Burner Assembly: See Figure 25
The burner assembly consists of the burner components, the heat exchanger, and flame arres-
tors, air intake and exhaust . This assembly performs several functions.
The orifice introduces fuel at a predetermined pressure to the burner. This fuel flows through
the venturi tube and the venturi effect causes air to be drawn in through the intake flame arres-
tors. The air shutters regulate the combustion air quantity. Thus fuel and air are mixed in the
venturi tube and passed through the burner screen to the back of the combustion chamber,
where it is ignited and burned to produce the operating temperature required. See Figure 1,
section 1.3.
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