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Session: Parallel Session: Simulation and Design Tools
Session starts: Thursday 22 September, 11:10
Presentation starts: 11:10
Room: Auditorium

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Francesco Casella (Politecnico di Milano, Dipartimento di Elettronica ed Informazione)
Tiemo Mathijssen (Process and Energy Department, TU Delft)
Piero Colonna (Process and Energy Department,TU Delft)
Jos van Buijtenen (Tri-o-gen B.V.)

Abstract:
Several applications of ORC power systems demand for stringent control requirements. Examples are solar conversion by means of a direct vapour generator [1], heat recovery from automotive engines [2] and operation in island mode, connected to a local grid and local loads, as it would be the case for instance for installations in remote areas of developing countries. In all these cases normal operation is intrinsically dynamic and a suitable control strategy must be implemented. Dynamic models are an indispensable tool to study and optimize the design the control system [3][4]. A dynamic model suitable for ORC power systems and flexible in terms of plant configuration and working fluids is presented. As an example, the model of the Tri-o-gen power unit is obtained by assembling components and modules of the Modelica ThermoPower library linked to the FluidProp package for the calculation of fluid thermophysical properties. Simulation results are validated by comparison with field data obtained from ad hoc experimental runs. A discussion about possible control strategies is briefly outlined.