Saturday, May 18, 2013

Another PV-T Hybrid pops up (and in the US of all places)

Solar Zentrum

http://www.szna-usa.com/product-portfolio.html

They placed an article in "North American Clean Energy Magazine"

 http://www.nacleanenergy.com/

It looks like the print version is ahead of the online version (and that the author works at Solar Zentrum.) I had hoped to link to the story if they had posted it but maybe we have to wait.

I wanted to point out that they snuck in a very odd special case for their impressive info graphic, one that kind of points out the trouble with conventional hybrids. To generate their flattering "20% more" they used very cool rain water to knock down the heat. This is not uniformly, or even commonly available as a resource "in any climate zone." And it makes a huge difference. Getting a panel down to 77 degrees from 145 (F) is not a trivial thing. 1 gallon of water every two hours or so and remember it needs to exit at 77 (or below.) Rainwater turned into less cool rainwater, now what? water the greenhouse? Hardly a common scenario.

Kinda casts an unflattering light on on the magazine too. That info graphic is (along with being done with too small print and low contrast) troubling. Like why is the irradiance shown on such a small vertical scale? and why did it run for such a short time? Did they, like me, run out of rainwater?

ugh.

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