Global Power Technologies
APPENDIX B — PROCESS DESCRIPTION
302954 rev0 | Model 8550-RU
Page 52 of 53
Figure 32 – Gross Power Unit Electrical Output Characteristics at 20°C,
Beginning of Life (without Power Conditioner)
The typical gross electrical output of the Model 8550-TEG Power Unit at nominal ambient
temperature is characterized in Figure 32
This figure demonstrates the importance of the Power
Conditioner, which prevents the TEG from exceeding the customer voltage setpoint (user-adjustable
with factory default of 27.1 Volts). This both ensures that the power unit operates within the optimal
power region and that the maximum tolerable power unit voltage is not exceeded.
Operating voltages outside the nominal 24- to 30-Volt range are best achieved by connecting a DC-to-
DC Converter to the output of the TEG. Nominal 12-Volt and 48-Volt DC-DC Converter options are
available for the Model 8550-RU TEG. Consult GPT for assistance with finding the best system to suit
your application.
The available power of a Model 8550-RU TEG is also a function of the amount of cooling supplied by
the heat pipes, and this cooling is affected by both the ambient air temperature and the wind speed.
The effect of wind will always be to increase the cooling effect, and therefore increase the available
power. Refer to Section 4.1.1 for corrected air temperature for wind.
Whenever possible, set up and testing of the generator should be performed during periods of low
wind, as these readings are generally more reliable than those using the wind speed corrections.