Performance Evaluation of the Pressurized Synhelion Absorbing Gas Receiver

Zavattoni, Simone and Good, Philipp and Geissbühler, Lukas and Rutz, David and Toffanin, Riccardo and Montorfano, Davide and Ambrosetti, Gianluca and Barbato, Maurizio Performance Evaluation of the Pressurized Synhelion Absorbing Gas Receiver. [Review of proceedings, other sources and documents]

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The pressurized design of the Synhelion absorbing gas receiver concept has been presented. Despite its intrinsic increased design complexity, foreseen advantages such as re-ceiver downscaling and more compact piping and insulation systems were the drivers for the initial development of the 250 kWth receiver design operating at high pressure (10 bar abso-lute). The latter was driven by the results of specific computational fluid dynamics (CFD) sim-ulations aimed at evaluating the receiver thermo-fluid dynamics behaviour along with the rela-tive performance. This paper shows the results of the two initial CFD simulations campaigns aimed at evaluating the effect, on the receiver performance, of the integration of absorbing inserts (i.e., a series of concentric disks specifically arranged into the cavity to capture the incoming concentrated solar radiation) and the position and shape of the inlet section of the heat transfer fluid. The simulations results allowed not only to evaluate the receiver perfor-mance, in terms of thermal efficiency, but also to observe some criticalities related to the mo-tion of the HTF through the receiver.

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