An ORC based power plant for waste heat recovery in stationary applications has been developed and experimentally characterized. The aim of the study was to investigate the performance of a sliding vane rotary expander as the device to convert the enthalpy of the working fluid, namely R236fa, into mechanical and electric energy. A theoretical model of the expander supported the design and allowed to assess the thermodynamic transformations that take place in it. Furthermore, a deep experimental campaign explored the behavior of the expander and of the recovery system also at o design conditions. The experimental activity on the expander included the reconstruction of the indicated diagram using a set of high frequency piezoelectric pressure transducers that provided an accurate prediction of the pressure evolution inside the cell. The overall cycle eciency achieved was close to 8 % and further improvements of the expander design have been addressed. The high temperature source was at around 120 C and the mechanical output power close to 2 kW make the expander and the whole plant suitable for plenty of potential recovery applications.

Mechanical Energy Recovery From Low Grade Thermal Energy Sources

CIPOLLONE, Roberto
;
BIANCHI, GIUSEPPE;DI BATTISTA, DAVIDE;
2014-01-01

Abstract

An ORC based power plant for waste heat recovery in stationary applications has been developed and experimentally characterized. The aim of the study was to investigate the performance of a sliding vane rotary expander as the device to convert the enthalpy of the working fluid, namely R236fa, into mechanical and electric energy. A theoretical model of the expander supported the design and allowed to assess the thermodynamic transformations that take place in it. Furthermore, a deep experimental campaign explored the behavior of the expander and of the recovery system also at o design conditions. The experimental activity on the expander included the reconstruction of the indicated diagram using a set of high frequency piezoelectric pressure transducers that provided an accurate prediction of the pressure evolution inside the cell. The overall cycle eciency achieved was close to 8 % and further improvements of the expander design have been addressed. The high temperature source was at around 120 C and the mechanical output power close to 2 kW make the expander and the whole plant suitable for plenty of potential recovery applications.
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11697/16258
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