Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
A CFD-based virtual test-rig for rotating heat exchangers
Rotating heat exchangers are used in steel industry, air conditioning and thermal power plants to pre-heat air used in steam generators or for waste heat recovery. Here we focus on a rotating heat exchanger on a so-called Ljungström arrangement operated in thermal power plants to pre-heat the air fed to the steam generators. In these devices the heat exchange between two fluids is achieved through a rotating matrix that gets in contact alternatively with the two fluid streams and acts as a thermal accumulator. To increase the heat capacity and the overall exchange surface, the rotating matrix is filled by a series of folded metal sheets. In the paper we de-scribe a methodology to account for the effects of the Ljungström in a virtual test-rig implemented in a Computational Fluid Dynamics environment. To this aim, a numerical model based on the work of Molinari and Cantiano was derived and implemented in the OpenFOAM library. RANS numerical results were compared with those of a mono-dimensional tool used by ENEL to design Ljungström heat exchangers and validated against available measurements in a real configuration of a thermal power plant.
A CFD-based virtual test-rig for rotating heat exchangers
Rotating heat exchangers are used in steel industry, air conditioning and thermal power plants to pre-heat air used in steam generators or for waste heat recovery. Here we focus on a rotating heat exchanger on a so-called Ljungström arrangement operated in thermal power plants to pre-heat the air fed to the steam generators. In these devices the heat exchange between two fluids is achieved through a rotating matrix that gets in contact alternatively with the two fluid streams and acts as a thermal accumulator. To increase the heat capacity and the overall exchange surface, the rotating matrix is filled by a series of folded metal sheets. In the paper we de-scribe a methodology to account for the effects of the Ljungström in a virtual test-rig implemented in a Computational Fluid Dynamics environment. To this aim, a numerical model based on the work of Molinari and Cantiano was derived and implemented in the OpenFOAM library. RANS numerical results were compared with those of a mono-dimensional tool used by ENEL to design Ljungström heat exchangers and validated against available measurements in a real configuration of a thermal power plant.
A CFD-based virtual test-rig for rotating heat exchangers
CORSINI, Alessandro (Autor:in) / DELIBRA, GIOVANNI (Autor:in) / Di Meo, Giulio (Autor:in) / Martini, Mirko (Autor:in) / RISPOLI, Franco (Autor:in) / SANTORIELLO, ANDREA (Autor:in) / Corsini, Alessandro / Delibra, Giovanni / Di Meo, Giulio / Martini, Mirko
01.01.2015
Aufsatz (Konferenz)
Elektronische Ressource
Englisch
DDC:
620
Measurement of VOC transfer in rotating heat exchangers
| British Library Conference Proceedings | 2000
Effect of chemical composition on VOC transfer through rotating heat exchangers
| Online Contents | 2002
Effect of chemical composition on VOC transfer through rotating heat exchangers
| British Library Conference Proceedings | 2002
British Library Online Contents | 1993
Numerical simulation of rotating bending process for U-tubes in heat exchangers
| British Library Online Contents | 2009