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The engine built in a special lab of the Agricultural University of Athens. The 20kWe ORC unit engine comprises of a screw expander Hanbell as the expansion device of the system, while a centrifugal pump Grundfos of vertical flow with magnetic coupling was selected to cover the needed head. The whole engine was designed for organic fluid R1234ze (E). A shell-tube heat exchanger was designed as the engine’s condenser, while a plate heat exchanger was selected as evaporator. ORC4SHIP received the 2020 technical Achievement award from Lloyds List for the inherited technology and innovation of the engine and awarded from GSRT for funding under the research and innovation action