Evaluate the validity of the empirical correlations of clearance and friction coefficients to improve a scroll expander semi-empirical model

Kutlu, Çağrı; Erdinç, Mehmet Tahir; Li, Jing; Su, Yuehong; Pei, Gang; Gao, Guangtao; Riffat, Saffa

doi:10.1016/j.energy.2020.117723

Cited by 10 publications

(2 citation statements)

References 37 publications

(56 reference statements)

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“…Instead, in [20] a quasi-dimensional numerical model was presented for the purpose of simulating the working process of a scroll expander operating with compressed air: the results indicate that an optimal pressure ratio for each scroll expander exists, which must be considered in the design phase along with clearance size and the scroll vane height to pitch ratio. Semi-empirical models have also been released [21], and these have been improved with suitably defined empirical correlations of clearance and friction coefficients [22].…”

Section: Design and Technological Improvement Of Scroll Expandersmentioning

confidence: 99%

Feasibility Assessment of a Dual Intake-Port Scroll Expander Operating in an ORC-Based Power Unit

2022

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The main driver of research in the road transportation sector is almost certainly the development of technologies which allow for the reduction of CO2 emissions from internal combustion engines (ICEs). Wasted heat recovery (WHR) from the exhaust gases of ICEs based on organic rankine cycle (ORC) power units is one of the most promising technological solutions. However, several issues are raised when the recovery unit is scaled down to small applications, not to mention the fact that thermal sources are characterized by their intrinsically transient nature, as is the case with ICEs. In fact, this leads the ORC unit having to work frequently in off-design conditions. To successfully overcome this issue, the proper design and selection of the expanders are crucial. They are generally chosen from volumetric-type machines, thanks to their capacity to deal with time-varying thermo-fluid dynamic inlet properties. Among them, scroll machines represent one of the best solutions, despite them not yet being optimized as expanders, with them having been studied more as compressors. Dual-intake-port (DIP) technology is a novel solution used to enhance the performance of scroll machines. The effectiveness of this technology was assessed thanks to a comprehensive, experimentally-validated theoretical model of the scroll. It demonstrated that DIP technology can produce a 25% increase in mechanical power with respect to the baseline machine, without modifying the in–out pressure ratio. Maintaining a constant pressure difference across the expander at 5.6 bar, the power grew from 1131 W to 1410 W with the adoption of DIP technology. This power boost is lower than that achieved with a comparable DIP sliding rotary vane expander (SVRE) already studied by the authors, but the DIP Scroll achieved a higher efficiency (50–60%) when compared to the DIP SVRE case (40%).

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Section: Design and Technological Improvement Of Scroll Expandersmentioning

confidence: 99%

Feasibility Assessment of a Dual Intake-Port Scroll Expander Operating in an ORC-Based Power Unit

2022

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“…As a key component of ORC systems, the expander plays a vital role for the system performance. Hence, scroll expanders, which have a number of key advantages in micro and small scale ORC systems, have awakened increased interest in the relevant research community [1][2][3][4].…”

Section: Introductionmentioning

confidence: 99%

CFD analysis of the influence of variable wall thickness on the aerodynamic performance of small scale ORC scroll expanders

Emhardt

Tian

Song

et al. 2022

Energy

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Identification of a Technological Process with Application of Neural Network Modeling

Александрова

Шумихин

Кавалеров

2021

Cyber-Physical Systems

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Evaluate the validity of the empirical correlations of clearance and friction coefficients to improve a scroll expander semi-empirical model

Cited by 10 publications

References 37 publications

Feasibility Assessment of a Dual Intake-Port Scroll Expander Operating in an ORC-Based Power Unit

Feasibility Assessment of a Dual Intake-Port Scroll Expander Operating in an ORC-Based Power Unit

CFD analysis of the influence of variable wall thickness on the aerodynamic performance of small scale ORC scroll expanders

Identification of a Technological Process with Application of Neural Network Modeling

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