Posted by John on December 8, 2005, 4:40 am
Are there any trade or accrediting organizations that have engineering,
design, and/or installation procedures or guidelines similar to what
ACCA or ASHRAE does for the air conditioning business? Is there a
national code (even local codes where they exist may be helpful.)
Can y'all suggest any good design or "engineering" books, magazines, or
even individual's web sites.
The more I read the questions and answers in this group the more
fascinated I am with solar thermal energy... and I'm still trying to
get my system design together.
Posted by DJ on December 8, 2005, 2:51 pm
It depends on your location, John.
For instance, in the province of Quebec, Solar Thermal when used for
domestic hot water, is regulated by the plumbing trade, specifically
the steam/water heating section.
Posted by John on December 10, 2005, 2:04 am
Thanks DJ and good point. I should have mentioned that live just north
of Dallas, Texas, USA. (I forget that this forum goes all over the
Posted by Gary on December 8, 2005, 4:03 pm
For engineering references, here is a list I like:
Look under "Technical Reference Books, Publications ..."
I also like this one:
Home Power Magazine has carried a number of articles that have very
good and detailed technical content. I've listed most of them here:
Under "Hands on Basics" -- most of these are free downloads from the
Home Power website.
"Build It Yourself" Solar Projects
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Posted by Iain McClatchie on December 9, 2005, 6:35 am
More great stuff from Gary.
Gary, can you explain why someone would want a heat exchanger
between the panels and the thermal storage tank in a drainback
I understand why there is a heat exchanger for the DHW -- that
would make it an open-loop system, and you get corrosion.
I can see only one advantage to the HX between panels and storage
tank: the small drainback tank on the panel loop can be positioned
high up, just under the bottom of the collectors. This reduces the
head for the pump, reducing the energy needed.
Seems like the HX would reduce the energy collected, though. The
panels and tank, at least the ones I'm looking at, cost a lot more
than the present value of the electricity to run that pump, so it
seems unwise to reduce the efficiency of the expensive thing to
increase the efficiency of the cheap thing.