Experimental investigation and optimal performance assessment of four volumetric expanders (scroll, screw, piston and roots) tested in a small-scale organic Rankine cycle system

Dumont, Olivier; Parthoens, Antoine; Dickes, Rémi; Lemort, Vincent

doi:10.1016/j.energy.2018.06.182

Article (Scientific journals)

Experimental investigation and optimal performance assessment of four volumetric expanders (scroll, screw, piston and roots) tested in a small-scale organic Rankine cycle system

Dumont, Olivier; Parthoens, Antoine; Dickes, Rémi et al.

2018 • In Energy

Peer Reviewed verified by ORBi

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https://hdl.handle.net/2268/227372

DOI
10.1016/j.energy.2018.06.182

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Keywords :

Modeling; Experimental; Scroll; Screw; Piston; Roots; Volumetric; Expander; ORC

Abstract :

[en] The aim of this paper is to facilitate the selection of the expander for a small-scale organic Rankine cyclebased on an experimental comparison of a piston, a screw, a scroll and a roots expander. First, based on aliterature review, a comparison between these four technologies of volumetric expansion machines isperformed. Afterward, four displacement expanders [2e4 kW] are tested on two similar small-scale ORCunit withfluid R245fa. The maximum effective isentropic efficiencies measured are 53% for the pistonexpander and the screw expander, 76% for the variable-speed scroll and 48% for the roots machine.However, these performances do not reflect the highest efficiencies achievable by each expander: thetest-rig presents experimental limitations in terms of massflow rate and pressure drop (among others)that restricts the achievable operating conditions. The calibration of semi-empirical models based on themeasurements allows to overcome this issue and to predict the isentropic efficiency in optimal condi-tions despite the limitations of the test-rigs. Based on experimental results, extrapolated prediction ofthe semi-empirical model and practical considerations, some guidelines are drawn to help the reader toselect properly a volumetric expander.

Disciplines :

Energy

Author, co-author :

Dumont, Olivier ; Université de Liège - ULiège > Département d'aérospatiale et mécanique > Systèmes énergétiques

Parthoens, Antoine ; Université de Liège - ULiège > Département d'aérospatiale et mécanique > Systèmes énergétiques

Dickes, Rémi ; Université de Liège - ULiège > Département d'aérospatiale et mécanique > Systèmes énergétiques

Lemort, Vincent ; Université de Liège - ULiège > Département d'aérospatiale et mécanique > Systèmes énergétiques

Language :

English

Title :

Experimental investigation and optimal performance assessment of four volumetric expanders (scroll, screw, piston and roots) tested in a small-scale organic Rankine cycle system

Publication date :

2018

Journal title :

Energy

ISSN :

0360-5442

eISSN :

1873-6785

Publisher :

Elsevier, United Kingdom

Peer reviewed :

Peer Reviewed verified by ORBi

Available on ORBi :

since 27 August 2018

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Scopus citations^®

101

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106

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