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Global Power Technologies START-UP AND OPERATION
302842 Rev0 | Sentinel Page 23 of 61
4.1.1 TEMPERATURE CORRECTION FACTOR
Figure 13 – OCV Ambient Temperature Correction Factor
As temperature increases, the Sentinel TEG’s power output drops by 0.25% per °C when the ambient
temperature rises above 25°C [77°F]. To offset this potential drop in power output, the Sentinel TEG’s
target OCV must be adjusted to accommodate the site’s ambient temperature.
Use the chart in Figure 13 to determine the temperature correction factor for the current ambient
temperature. Record the current ambient temperature and ambient temperature correction factor in
the Performance Log at the end of this document.
To determine the temperature correction factor for the site’s ambient conditions:
1.
Find the current ambient temperature on the top or bottom axis of the graph in Figure 13.
2. From the ambient temperature axis, follow the vertical line up until it touches the curve
(diagonal line).
3. From the point where the ambient temperature line touched the curve, follow the horizontal line
to the left to find the ambient temperature correction factor.
4. Record this number in the Performance Log. This will be used for the target OCV calculation.
For example: At 5°C, the Ambient Temperature Correction Factor is 1.05.