Quantcast Collector Flow Rates Balanced - mo4050083

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A Property Grounded
Make sure galvanic corrosion has not degraded the connection at the frame end of
the wire. Although this corrosion is a liability, it is more than offset by the number of
controls saved by collector frame grounding.
Collector Flow Rates Balanced
Use existing thermometers, existing thermometer wells and a thermometer, or a
contact thermometer (contact pyrometer) to measure the outlet temperatures of
each collector group in the array.
These temperatures should all be within five degrees of each other. Higher
temperatures indicate flow rates lower than the rest of the array. Lower
temperatures indicate higher flow rates.
Be aware of changing solar conditions while testing large arrays. Many collectors
respond to changes in solar levels in less than one minute. It may be necessary to
check the outlet temperatures two or three times to be sure.


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