|
It's really about heat/energy storage. You can't run pond water through the solar collector. It will just ruin and clog it. The solar collector needs to heat water in an exchanger/storage unit and the pond water piping needs to flow through it exchanging the cold for heat. Night time is the problem. Without a back up heat source (propane, gas etc.) the temp will drop severely at night and the system will spend it's time the next day catching up. Ideally one would bury a huge insulated tank filled with the coolant for the solar units and have the tubing from the pond circulate through it. It would have to be large enough to hold enough heat to carry the system through the night. The pond would also have to be well insulated. This would be a good case for building ponds with insulated concrete forms to begin with.
|