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Global Power Technologies
3-3
5120
3 .2 System Components
The main parts of the 5120 TEG are as follows (see Figure 14):
Power Unit:
The power unit includes the thermopile and the cooling fins. The thermopile
consists of the N and P elements (thermocouples) placed in a sealed compartment to prevent
oxidation and surrounded by insulation to prevent heat loss.
Cooling Fins:
Cooling of the thermopile is done by the free movement of ambient air through
the cooling fins. Check that the cooling fins are clear of leaves and other debris. There should
be enough space around the fins for air movement.
Burner:
Gas is expanded through an orifice and then flows through a venturi where it draws
in air needed for combustion. This mixture passes through the burner screen and burns at the
back of the combustion chamber (next to the thermopile).
Fuel System:
The power output of the generator is controlled by adjusting the amount of fuel
sent to the burner. The fuel system contains a pressure regulator which allows adjustment of
fuel flow, a pressure gauge, and a pressure switch which signals the spark ignition system that
fuel is present. An optional Shut-Off (SO) valve may also be present which closes when heat
is no longer present in the exhaust stack, thereby stopping the flow of gas.
Spark Ignition (SI) Module:
When the fuel is turned on, the gas pressure causes the pressure
switch (located on fuel system) to close. This signals the SI module to generate 12 kV sparks,
which arc from the SI electrode to the combustion chamber wall, causing ignition to occur.
Once the fuel is burning the exhaust heat will signal the SI module to stop sparking.
Limiter Converter (L/C):
The 220 Watt L/C consists of two separate circuits. The first is a
shunt type voltage limiter that regulates the output of the generator. The second is a DC to DC
converter that switches the input voltage to a different output voltage.
Protective Limiter:
When the TEG does not have a Limiter Converter it will have a Protective
Limiter located on the underside of the cabinet. It is a shunt type voltage limiter that regulates
the output of the generator
Cabinet:
The power unit, burner and fuel system are enclosed in the stainless steel cabinet.
Fin Duct:
The fin duct acts as a chimney, causing ambient air to rise through the cooling fins,
thus cooling the thermopile.
3 .2 .1 Power Unit
The power unit contains the thermoelectric materials which produce the electrical power.
Because these materials corrode in atmospheric conditions at high temperatures they are con
-
tained in a sealed unit.
If all other parts of the TEG have been checked out and it still does not produce rated power
then the power unit may be faulty. Check the momentary open circuit voltage as follows:
Summary of Contents for 5060
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Page 10: ...Global Power Technologies 1 2 5120 ...
Page 15: ...Global Power Technologies 1 7 5120 ...
Page 27: ...Global Power Technologies 2 12 5120 Figure 13 Wiring Diagram 5120 TEG ...
Page 35: ...Global Power Technologies 3 8 5120 Figure 18 Burner Assembly ...
Page 47: ...Global Power Technologies 3 20 5120 ...
Page 50: ...Global Power Technologies 4 3 5120 Figure 26 220 Watt L C Connection and Adjustment Details ...
Page 51: ...Global Power Technologies 4 4 5120 ...
Page 55: ...Global Power Technologies 5 4 5120 Figure 30 Cathodic Protection System Parts Identification ...
Page 57: ...Global Power Technologies 5 6 5120 ...
Page 63: ...Global Power Technologies 6 6 5120 Figure 33 Exhaust Stack Removal ...
Page 75: ...Global Power Technologies 7 2 5120 7 2 Physical Dimensions Figure 42 Physical Description ...