Experimental performance of a piston expander in a small- scale organic Rankine cycle

Oudkerk, Jean-François; Dickes, Rémi; Dumont, Olivier; Lemort, Vincent

doi:10.1088/1757-899x/90/1/012066

Cited by 29 publications

(25 citation statements)

References 3 publications

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“…1b), a twin-screw expander (Fig. 1c) and a swash-plate piston expander [7] (Fig. 1d), are tested in a same micro-scale ORC system using R245fa as working fluid [8].…”

Section: State Of the Artmentioning

confidence: 99%

“…The admission and exhaust processes are achieved by means of a valve-less system that induces symmetric opening and closing of the cylinder volumes. The expander is connected to an asynchronous electrical motor and a four-quadrant variable-frequency drive is used to control the shaft speed [7]. It has been sized for water/ethanol mixture applications and converted to run with R245fa.…”

Section: Experimental Facilitymentioning

confidence: 99%

“…Finally, in the case of piston expanders, the recompression losses due to the fluid trapped inside the clearance volume (V 0 ) is modeled by means of two-stage compression as proposed by Ref. [7]. For further information regarding the governing equations of this model, refer to [10].…”

Section: Semi-empirical Modelmentioning

confidence: 99%

“…Some authors use more advanced lumped-parameters models with more calibration parameters. Sometimes an additional exhaust pressure drop is modeled [7,24]. Giuffrida used a more advanced model for mechanical losses and considered additional radiative ambient losses for a single screw expander [34].…”

Section: Semi-empirical Modelmentioning

confidence: 99%

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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

Parthoens

Dickes

et al. 2018

Energy

100

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Keywords:Modeling Experimental Scroll Screw Piston Roots Volumetric Expander ORC a b s t r a c tThe aim of this paper is to facilitate the selection of the expander for a small-scale organic Rankine cycle based on an experimental comparison of a piston, a screw, a scroll and a roots expander. First, based on a literature review, a comparison between these four technologies of volumetric expansion machines is performed. Afterward, four displacement expanders [2e4 kW] are tested on two similar small-scale ORC unit with fluid R245fa. The maximum effective isentropic efficiencies measured are 53% for the piston expander 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: the test-rig presents experimental limitations in terms of mass flow rate and pressure drop (among others) that restricts the achievable operating conditions. The calibration of semi-empirical models based on the measurements allows to overcome this issue and to predict the isentropic efficiency in optimal conditions despite the limitations of the test-rigs. Based on experimental results, extrapolated prediction of the semi-empirical model and practical considerations, some guidelines are drawn to help the reader to select properly a volumetric expander.

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“…1b), a twin-screw expander (Fig. 1c) and a swash-plate piston expander [7] (Fig. 1d), are tested in a same micro-scale ORC system using R245fa as working fluid [8].…”

Section: State Of the Artmentioning

confidence: 99%

Section: Experimental Facilitymentioning

confidence: 99%

Section: Semi-empirical Modelmentioning

confidence: 99%

Section: Semi-empirical Modelmentioning

confidence: 99%

See 2 more Smart Citations

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

Parthoens

Dickes

et al. 2018

Energy

100

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show abstract

“…aking this into account, Oudkerk et al [96] conducted an experimental study of a piston expander in a small-scale ORC. The working fluid used 245fa.…”

Section: Reciprocantmentioning

confidence: 99%

Thermo-economic assessment of small-scale organic Rankine cycle for low-grade industrial waste heat recovery based on an experimental application

Pérez¹

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ACKNOWLEDGMENTSThe author is indebted to the Jaume I University for its financial support under the PhD grant PREDOC/2013/28 of 'Convocatòria d'ajudes predoctorals per a la formació de personal investigador del Pla de promoció de la investigació de la Universitat Jaume I de Castelló (Spain)' and the stay support E-2016-08 'Convocatòria d'ajudes per a realitzar estades temporals en altres centres d'investigació, per al personal docent i investigador de la Universitat Jaume 2016'. Also to thank greatly the Minister of Industry of 'Generalitat Valenciana' (Spain) for its financial assistance under project INIDIV2010022, and ExpanderTech (Rank®) and Keros-Cerámica for its collaboration under this project. AGRADECIMIENTOSQuisiera agradecer al director de la tesis, el Dr. Joaquín Navarro Esbrí, la oportunidad brindada y la confianza depositada en mí durante estos años. Gracias por esos consejos que me han permitido llegar hasta aquí.A mis amigos y compañeros del grupo de investigación ISTENER, Fran, Adrián, y Ángel habéis sido un apoyo fundamental para la consecución de este trabajo. A Fran especialmente quiero reconocerle la ayuda que me ha prestado para que este proyecto salga adelante.Hay buenos amigos que estoy seguro han marcado el carácter de esta tesis. Ivan Calvet, quiero agradecerte la fuerza que me has transmitido en cada uno de esos cafés. Sergio Balderrama, gracias por ese punto de vista siempre tan acertado. Y Miguel Manuel de Villena, no olvidaré la experiencia vivida a tu lado.Por supuesto, no hay paciencia más grande que la de aquél que te quiere. Así que gracias a mi familia, Peris -Pérez -Górriz -Pellicer -Llobregat, Baena -Urueña. Para mis padres, un ejemplo a seguir, y para Mar, con quien seguir el ejemplo. ABSTRACTNowadays, the environmental concern is leading researchers to focus on more sustainable energy systems. In this way, small-scale Organic Rankine Cycles (ORC) are receiving an increasing attention to produce electricity from low-grade heat sources.Among the different applications for the ORC adoption, this study focuses on industrial processes. This application raises a great interest due to its high amount of waste heat recoverable, but lacks of in-depth experimental investigations on the topic.Being aware of the economic feasibility relevance for the ORC adoption in practical applications, more cost-effective solutions are being explored in the literature through thermo-economic optimizations. However, the results achieved cannot be discussed with respect to actual projects implemented in industry, due to its absence.In light of this, this thesis proposes as novelty to conduct the thermoeconomic optimization from an experimental application in industry. In this manner, a comprehensive model of the system can be developed and validated from actual data. Accordingly, more realistic results can be reached to assess the economic feasibility of the optimized proposal under the different economic scenarios.The main results obtained in this study show that, by means of a multivariable optimiza...

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Expander design procedures and selection criterion for small rated organic rankine cycle systems

Capata

Pantano

2020

Energy Science & Engineering

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The expander selection and the optimization of its performance are fundamental in low-temperature heat recovery systems. The parameters that must be considered are high efficiency isentropic, pressure ratio, power, lubrication requirements, complexity, rotation speed, dynamic balancing, reliability, and cost. In these systems, the turboexpanders are not always the optimal solution. For these reasons, taking advantage of all the research in the field of dynamic and volumetric machines, a design procedure for all expander types has been presented. 1.1 | Inward-flow radial turbine The radial flow turbines (IFR) are used in turbochargers for commercial engines and fire pumps. They are very compact

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Experimental performance of a piston expander in a small- scale organic Rankine cycle

Cited by 29 publications

References 3 publications

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

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

Thermo-economic assessment of small-scale organic Rankine cycle for low-grade industrial waste heat recovery based on an experimental application

Expander design procedures and selection criterion for small rated organic rankine cycle systems

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