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Rick H Parker

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Reply with quote  #51 
There is always the possibility whoever installed them as doors got it wrong. It is easy to check. Hold a lit candle in front of the glass, move the candle to the side until you see four reflections of the candle flame. If all four reflections are the same color it is not low-e glass. If it is low-e glass one of the four will be a different color, the odd color one is the coated surface. If by chance surface #2 is the one coated, it would at least in part explain the low summer performance. 
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Rick H Parker
Kansas, USA
Electronics Engineering Technologist

Garage_Hermit

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Reply with quote  #52 
"Hold a lit candle in front of the glass,"

you forgot the Zippo bit...

G_H

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(1)  "Heat goes from hot to cold, there is no directional bias"
(2) It's wrote, "voilĂ " unless talking musical instruments...
Rick H Parker

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Reply with quote  #53 
you forgot the Zippo bit...

Zippos are from an past era . Nowadays not everyone knows what a Zippo is but, everybody knows what a candle is. ... Or are you saying I forgot instructions on how to light the candle? [confused]

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Rick H Parker
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stmbtwle

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Reply with quote  #54 
Zippos might be from a bygone era but Bics (even matches) are still around. The candle just adds an unnecessary step. I'd probably use a small flashlight.
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ChrisJ

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Reply with quote  #55 
I guess I'm a little confused about how low-e works.

I thought that it works for both seasons, reflects the heat in summer and allows heat threw in winter.

I will evaluate the performance this winter. The doors were free(sort of) so I may change to twin wall in the spring.

Really hoped that summer operation would have maxed out my tank temps at 150*F. 


ChrisJ

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Reply with quote  #56 
While I appreciate the advise and info, please don't muddy up my thread. thank you


Thread has been cleaned up as requested by ChrisJ. People be respectful, polite and helpful. This back and forth bickering is boring. Stop.

SolarInterested
Garage_Hermit

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Reply with quote  #57 
"I thought that it works for both seasons, reflects the heat in summer and allows heat threw in winter".

Hi, Chris,

That's not really the way Low-E works: you have to install it for what *you* want !

The low-e coating interferes with the passage of light/electromagnetic energy, and so it can be installed either way round, depending on the site, viz. solar control requirement (= reducing solar gain), or "heat-retention requirement" (= stopping heat leaving the room).

So the first thing to determine, is how is *YOURS* installed, & for that, you need to do the test.

Best regards,

G_H

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(1)  "Heat goes from hot to cold, there is no directional bias"
(2) It's wrote, "voilĂ " unless talking musical instruments...
ChrisJ

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Reply with quote  #58 
Thanks, I will have to check on placement of coating.

The other thing I thought of is that the placement of the sensor is not the best. It's on the black aluminum fin that wraps one of the 1/2" copper risers, so maybe the water entering from the bottom of the tank is lowering the temp at the sensor.

I will try turning off the pump with the sun hitting the collector and see how hot it gets.

Thanks everyone for their input.

Chris
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