What piping is recommended between the solar panels and the technical room?
The transfer circuit lines transport the heat transfer fluid between the panel field and the elements of the solar circuit in the technical room.
The choice of transfer lines must be considered in order to:
optimize ease and cost of installation
limit linear pressure losses
Indeed, the flow rate of the heat transfer fluid passing through the transfer lines depends on the type or panel (SPRING4 or SPRING3), the application (DHW, solarothermal heat pump, etc) and the number of panels.
This determines the diameter of the pipes to limit the linear pressure losses.
The possible material for transfer line are summed up in the following tab:
Panel and application | Stainless steel creased hose | Insulated copper | Multicouche (PEX-Al-PEX) | PVC (anti UV) | Comments |
SPRING4 - solarothermal heat pump | YES | YES | NO | NO | Insulation NOt needed on the outside roof |
SPRING4 - DHW (domestic heat water) | YES | YES | YES | NO | Insulation mandatory on the roof (anti-UV) |
SPRING3 - DHW | YES | YES | YES | NO | Insulation mandatory on the roof (anti-UV) |
SPRING3 - Direct swiming pool | NO | NO | NO | YES |
Notes:
the hydraulic circuits must be designed and dimensioned taking into account the dilatation of the transfer lines
Outside transfer lines must resist UV and corrosion due to outside conditions.
All the transfer lines must have a material compatible with inlet-outlet kit
Burying of the transfer lines:
In some cases it can be useful to bury the pipes. In this case it is mandatory to protect it by using the appropriate sheath.
To go further : What is the maximum operating pressure of the SPRING panels?