How to calculate the heat input of SPRING panels?


The caloric contribution of the DualSun SPRING panels on a solar tank or swimming pool is calculated using the formula for the amount of heat.

The input data are:

  • The temperature difference between the inlet and the outlet of the panels

  • The volume of fluid transported through the panels

  • The heat capacity of this same fluid (i.e. the amount of thermal energy it can transport)


The formula for the amount of heat is as follows Q=mCpT

  • Q in J

  • m mass of the fluid in kg (i.e.m=Dhuse), 

  • Cpmass heat capacity of the fluid in

  • T = T°panel output-T°panel entry


Cp 40% glycol water = 3.5

Cp salt or chlorinated water = 4

To learn more about the actual performance of our panels, you can consult our blog.