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Combining a active solar heat store and cistern

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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
 

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


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
 
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
 
http://www.cdc.gov/ncidod/eid/vol5no4/carpenter.htm

jsw

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