How many DualSun SPRING panels are necessary to provide heat to a ground source heat pump ?
The sizing of the SPRING solar installation and water/water heat pump coupling must be done according to the cooling power required in the collection circuit, using the following formula:
| Number of panels 1 = Max cooling capacity [W] / Thermal Power of hybrid panel [Wth/PVT] |
The solar power must be estimated in the worst case: no sunshine and minimum ambient T° at the location of the installation (refer to the first graph of this article with a G = 0 W/m2).
Surface of a panel is here the surface of the heat exchanger, in the case of the SPRING 425 the surface is equal to 2.08 m2.
And as the solar panels have a maximum flow rate limit, it is necessary to ensure that the minimum flow rate to be sent to the evaporator is respected:
| Number of panels 2 = Minimum flow rate on the HP capture side / Maximum flow rate of the panels |
Finally the sizing formula is:
| Number of panels = MAX (Number of panels 1 , Number of panels 2) |
> To go further : Are DualSun SPRING panels compatible with water-to-water heat pumps?
