PV module temp [RE-wrenches]

[hugh piggott]

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At 4:55 pm -0700 25/9/01, Joel Davidson wrote:
>The formula for converting C. to F. is ((C + 40)1.8) - 40 = F.
>
>The formula for converting F. to C. is ((F + 40)0.555) - 40 = C.
>
>Cell temperature is approx. 20 degrees C. (68 F.) above ambient air 
>temperature.
>If ambient air temperature is 80 F., I expect cell temperature to be 
>approx. 148
>F and find it to be so.

Let's see.  ambient at 80F is ((80+40)0.555)-40=26.6C
	cell is 148F is ((148+40)0.555)-40=64.3C

temperature rise would be 64.3-26.6=37.7C and not 20 C.

You cannot apply the above conversion rule to temperature 
differences, only to actual temperatures.


-- 
Hugh

http://www.ScoraigWind.co.uk

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