I decided to invent my own Array and System for myself. It evolved
and worked and in essence it is designed to pre-heat the water
entering the combi boiler which, when it detects warm water entering, will close down the gas to accommodate. It can also be fitted to conventional boiler
systems via the hot water storage tank.
It comprises a Solar Array made of special finned copper tubing , a
Mini Storage tank with pump and Electronic Control Unit to circulate
the water when the array gets hotter than the tank.
Sounds simple but it took many technical challenges to overcome the
various inherent problems - air in the system, expansion of water
(pressure) , detection of temperatures, cycle times , array location
and fixing, design of the array and manufacture, pump and finally Mini
tank spec and configuration of water flows but it has been a great
challenge and a satisfying Eco project.