Carflex revisited [RE-wrenches]

Drake Chamberlin - Electrical Energy solar at eagle-access.net
Fri May 25 10:27:32 PDT 2001


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Bill and Wrenches,

The physics of evaporative cooling are well known.  If a conduit is full of 
water,  and conditions are hot enough to raise the temperature to 60 
degrees C, the water will evaporate quickly. This evaporation will cool the 
conduit.  When there is no more water in the conduit to cool it, it will be 
dry, by definition.

60 degrees C is 140 degrees F.  Try to get into a hot tub at 115 
degrees.  It will turn your skin bright red.  A 140 degree conduit would be 
quite hot to the touch.

To say conduit needs an 80 degree C rating stretches the credibility a bit 
far.  That is 176 degrees F, hot enough to boil water at high 
altitudes.  Getting these temperatures would require the use of 
concentrators.

Conduits for solar modules are either shaded by the array, or in the 
sun.  Solar modules are passively heated by the sun, and do not actively 
generate heat like a compressor.

If conduits for arrays do get over their rated temperatures, so do conduits 
for air conditioning units and other compressors.  PV needs to be on a 
level playing field with other types of wiring.

Drake

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