Pump speed optimisation for solar thermal system

Extended abstract attached - Introduction: Photovoltaic and solar thermal systems gather the inexhaustible energy from the sun, while reducing to need for fossil fuels and have consequently known an increasing. Quite often these systems are used in standard setups, while further optimization could lead to more efficient energy gathering. For example, solar thermal systems have multiple heat exchangers and optimizing for both heat exchangers leads to better heat transfer and system efficiencies