SOL Perpetua System
How the Sol-Perpetua System Works
2. SOLAR COLLECTOR PANELS
Solar collector panels can be of any manufacture so long as they use copper or stainless steel piping throughout and do not have air leaks.
People who are not familiar with solar water heating systems sometimes confuse them with electricity generating systems, The only thing the two types have in common is the energy source, the sun. Electricity generating systems, also called photo-voltaic (PV) systems, convert radiant solar energy into electricity, a high grade of energy, and store the energy in batteries. Solar water heating systems convert radiant solar energy into heat and store this heat in water. The rate of conversion for electrical systems is about 19%. The rate of conversion for water heating systems is between 35 and 65%, depending on many factors.
The main types of solar water heating collector panels, listed in order of cost and efficiency, are as follows:
- Unglazed plastic panels. These are low in cost and suited to pool heating only.
Their service life is usually a maximum of 15 years.
- Glazed panels with black painted metal absorber plates fastened to a small
diameter copper tubing thru which the working fluid is pumped.
- Glazed panels as above except except that the finish on the absorber plate
has a much lower rate of radiant heat loss, which is desirable in
- Evacuated tube collectors which are not strictly speaking "panels" but
an assembly of glass tubes. These colectors have this ability to deliver
heat on overcast days.
The SOL Perpetua system can use collector types 'B', 'C', and 'D'.