|
|
re: pool heater on a larger scale?
30 jun 2002
david voss wrote:
>steve spence wrote:
>> a 14' dish putting out 1500 gallons per day of 120 water with
>> no fuel costs is a viable heater...
>hmmm... let's see: 1500 gal * (120-50f) * 8.3 lb/gal = 870k btu/day.
>a 14' dia dish is 154 ft2, so at 100% collection efficiency, this is
>5650 btu/ft2/day...
>more realistic would be 1600 btu/ft2/day, tracked in the winter time
>in a good sun location like the sw...
nrel says a 2-axis tracker can only collect 11.6 kwh/m^2 (3.7k btu/ft^2)
on an average june day in phoenix...
>by the way, this (175k btu/day) would still be enough to heat a
>well-insulated house...
as i recall, the acro web site shows a 14' dish with a 3' storage
tank heating a large outdoor swimming pool with no cover, in texas.
nick
|
|
