1) Solar Radiation
2) Air Temperature
3) A wind speed of no more than three miles an hour.
test procedure does not evaluate
the effect of wind speed greater
than three miles an hour. In
addition, because of variability
of weather conditions, instrumentation
accuracies, and other test condition constraints,
thermal performance of any two collectors should
approximately the same if their ratings are within
25 Btu/(ft2day) ( per square
foot per day) this rating is
listed on the last column. It’s important to
note that these rating do not address the durability
collector or the Solar Investment
Value (SIV). The
SIV is the total energy contribution of a given collector,
based on the projected life of the collector.
Comparison Methods- Some Helpful Hints:
1) These collectors operate at the low temperature range
typical of pool heating. (75-95 degrees F.)
2) The first column on the left, list the name of the
manufacturer. A company name may appear more than once,
this is due to variations in collector size.
2) The column titled: Glazing refers to a glass or plastic
type cover on the collector. Most pool collectors are
unglazed, and do not have a cover.
3) To compare the efficiency among various collectors
based on Btu output per square foot look at the rating
listed on the last column on the right.
4) To compare the efficiency of any two collectors based
on the physical size of the collector, compare the numbers
in the second to last column on the right.
FOOT NOTE ON IN-DECK SOLAR POOL SYSTEMS
date there is no data to support
the efficiency of solar “collector” installed in a pool deck,
driveway or tennis court. The Florida Solar Energy Center
tested products from 4 different manufacturers. None
of the 4 are currently certified. At present, no collector
is certified for an “indeck” application.
The California Energy Commission states that all
solar systems sold in California must be certified
FSEC or the SRCC.