Posted by Curbie on March 4, 2011, 7:19 pm
I’m wondering about combining an active solar heat store and cistern,
since both the solar heat store and cistern basically hold water, I’m
wondering if what issues there would be in combining them???
It seems like I would need an isolated hydronic heating loop, but does
anyone see issues other than that???
The property I’m currently looking at has a 1600ft2 roof, collecting
~1000 gallons per inch of rainfall and my location averages about 16
inches per year. The rainfall for the prime heating months are pretty
low, so I’m thinking I could halt rain collection during those months
so the cold rain water does not effect the heat store.
Even just collecting water during the 7 warmest and rainiest months,
the numbers (below) suggest I could still collect 89% of my water
needs.
Thanks for the feedback,
Curbie
People Living in House 1
The Average Per Person Use 50 Gallons
Roof Catchment Area 1600 Ft2
Open Catchment (If) Area 0 Ft2
Volume of Water Caught 133 Ft3/In Rain
Gallons of Water Caught 997 Gal/In Rain
Gallons of Water Needed Monthly 1,521 Gallons
Gallons of Water Needed Yearly 18,250 Gallons
Gallons per Cubic Foot 7.480519 Gallons
The average American uses 100 Gallons/d
Month Rain Units Gallons Percent Total Catch Ave Tmp
Jan 0.54 In. 539 3.31% 0.00% N 23
Feb 0.58 In. 578 3.55% 0.00% N 30
Mar 1.16 In. 1,157 7.10% 0.00% N 37
Apr 1.79 In. 1,785 10.96% 10.96% Y 48
May 2.70 In. 2,693 16.53% 16.53% Y 58
Jun 2.65 In. 2,643 16.23% 16.23% Y 69
Jul 2.13 In. 2,124 13.04% 13.04% Y 74
Aug 1.19 In. 1,187 7.29% 7.29% Y 72
Sept 1.22 In. 1,217 7.47% 7.47% Y 63
Oct 1.01 In. 1,007 6.18% 6.18% Y 49
Nov 0.80 In. 798 4.90% 0.00% N 35
Dec 0.56 In. 559 3.43% 0.00% N 31
Total 16.33 In. 16,288 77.71%
Average 1.36 In. 1,357
Minimum 0.56 In. 559
Maximum 2.70 In. 2,693
Posted by Jim Wilkins on March 5, 2011, 7:58 pm
> Im wondering about combining an active solar heat store and cistern,
> since both the solar heat store and cistern basically hold water, Im
> wondering if what issues there would be in combining them???
> ... A big one is the accelerated growth of some micro-organisms around 110F.
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC239350/pdf/aem00166-0245.pdf
jsw
Posted by Curbie on March 6, 2011, 1:49 am
On Sat, 5 Mar 2011 11:58:15 -0800 (PST), Jim Wilkins
>> I’m wondering about combining an active solar heat store and cistern,
>> since both the solar heat store and cistern basically hold water, I’m
>> wondering if what issues there would be in combining them???
>> ... A big one is the accelerated growth of some micro-organisms around 110F.
>http://www.ncbi.nlm.nih.gov/pmc/articles/PMC239350/pdf/aem00166-0245.pdf
>jsw
Jim,
Good point, but don't both solar heat stores and cisterns require
chlorination to kill bacteria and viruses, and amoeba, and wont any
cistern water intended for consumption require yet further treatment
(de-chlorination & charcoal filtering) anyway?
Thanks,
Curbie
Posted by hallerb@aol.com on March 6, 2011, 2:40 am
> On Sat, 5 Mar 2011 11:58:15 -0800 (PST), Jim Wilkins
> >> Im wondering about combining an active solar heat store and cistern,
> >> since both the solar heat store and cistern basically hold water, Im
> >> wondering if what issues there would be in combining them???
> >> ... A big one is the accelerated growth of some micro-organisms around 110F.
> >http://www.ncbi.nlm.nih.gov/pmc/articles/PMC239350/pdf/aem00166-0245.pdf
> >jsw
> Jim,
> Good point, but don't both solar heat stores and cisterns require
> chlorination to kill bacteria and viruses, and amoeba, and wont any
> cistern water intended for consumption require yet further treatment
> (de-chlorination & charcoal filtering) anyway?
> Thanks,
> Curbie
drilled wells, one pumps water the other returns the water is whats
often done, you could skim some water off for water needs beyond
heating.
cisterns are generally contaminated surface water, needing
chlorination and treating to drinking and even skin exposure. plus
surface water wouldnt be as warm as water from 200 feet deep.....
Posted by Jim Wilkins on March 7, 2011, 2:57 am
> On Sat, 5 Mar 2011 11:58:15 -0800 (PST), Jim Wilkins
> ...
> Good point, but don't both solar heat stores and cisterns require
> chlorination to kill bacteria and viruses, and amoeba, and wont any
> cistern water intended for consumption require yet further treatment
> (de-chlorination & charcoal filtering) anyway?
> Thanks,
> Curbie
http://www.cdc.gov/ncidod/eid/vol5no4/carpenter.htm
jsw
> since both the solar heat store and cistern basically hold water, Im
> wondering if what issues there would be in combining them???
> ... A big one is the accelerated growth of some micro-organisms around 110F.