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research-article

Method for the preliminary fluid dynamic design of high-temperature mini-ORC turbines

[+] Author and Article Information
Sebastian Bahamonde

PhD Candidate Propulsion & Power Delft University of Technology Kluyverweg 1, 2629 HS Delft
S.Bahamonde@tudelt.nl

Matteo Pini

Assistant Professor Propulsion & Power Delft University of Technology Kluyverweg 1, 2629 HS Delft
M.Pini@tudelt.nl

Carlo De Servi

Postdoctoral Researcher Propulsion & Power Delft University of Technology Kluyverweg 1, 2629 HS Delft
C.M.DeServi@tudelft.nl

Antonio Rubino

PhD Candidate Propulsion & Power Delft University of Technology Kluyverweg 1, 2629 HS Delft
A.Rubino@tudelt.nl

Piero Colonna

Professor, Chair Propulsion & Power Delft University of Technology Kluyverweg 1, 2629 HS Delft
P.Colonna@tudelt.nl

1Corresponding author.

ASME doi:10.1115/1.4035841 History: Received November 01, 2016; Revised January 06, 2017

Abstract

Widespread adoption of renewable energy technologies will arguably benefit from the availability of economically viable distributed thermal power conversion systems. For this reason, considerable efforts have been dedicated in recent years to R\&D over mini organic Rankine cycle (ORC) power plants, thus with a power capacity approximately in the 3–50 kW range. The application of these systems for waste heat recovery from diesel engines of long-haul trucks stands out because of the possibility of achieving economy of production. Many technical challenges need to be solved, as the system must be sufficiently efficient, light and compact. The design paradigm is therefore completely different from that of conventional stationary ORC power plants of much larger capacity. A high speed turbine is arguably the expander of choice, if high conversion efficiency is targeted, thus high maximum cycle temperature. Given the lack of knowledge on the design of these turbines, which depends on a large number of constraints, a novel optimal design method integrating the preliminary design of the thermodynamic cycle and that of the turbine has been developed. The method is applicable to radial inflow, axial and radial outflow turbines, and to superheated and supercritical cycle configurations...

Copyright (c) 2017 by ASME
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