2.9.7
Collector Identification
On each collector, provide the following information:
a.
Manufacturer's name or trademark
b.
Model name or number
c.
Certifying agency label and rating.
2.9.8
Other Components
Provide collectors for the complete removal of internal moisture which may
develop in the collectors. [Collector weep holes or desiccants with air
vents may be used. If desiccants are used, provide 8 mesh silica gel with
approximately 10,000 cycles of regeneration.]
2.10
COLLECTOR SUPPORTS
[As indicated.] [Provide a commercial integrated structural system,
supplied by a single manufacturer, consisting of formed aluminum or
galvanized or plated steel channels, perforated with round or square holes,
and corrosion resistant brackets, clamps, bolts and nuts.]
2.11
COLLECTOR HEAT TRANSFER FLUID
**************************************************************************
NOTE: In lieu of the collector heat transfer fluid,
the use of water in a drainback concept may be
acceptable. Currently, there are only a few
companies using such drainback concept. Recommend
to use only non-toxic heat transfer fluid. For some
applications which tolerate low flash point and high
toxicity, the inexpensive inhibited ethylene glycol
(Union Carbide UCAR 17 at 70 percent volume; useful
temperature range: -34 to 149 degrees C -30 to 300
degrees F; specific heat: 3.31 kJ per kg per degree
C 0.79 Btu per pound per degree F; viscosity: 60
mPa.S at -23 degrees C and 1.5 mm2/s at 82 degrees C
60 centipoise at -10 degrees F and 1.5 centistokes
at 180 degrees F; specific gravity: 1.1 at 15.60
degrees C 60 degrees F) may be used. For example
only, the following Table 1 gives the engineering
data for three collector fluids which comply with
the requirements specified (For further information,
see Military Handbook, MIL-HDBK-1003/13, "Solar
Heating of Buildings and Domestic Water," Table 2-5):
TABLE 1
COLLECTOR HEAT TRANSFER FLUIDS
Manufacturer
Dow Corning
Resource
Uniroyal
Technology
Chemical
Corp.
Brand Name
Dow Corning
Sun-Temp
Synthetic
or Chemical
Q2-1132
Polyalphaole
SECTION 13610N
Page 18
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