Advances and challenges in ORC systems modeling for low grade thermal energy recovery

Ziviani, Davide; Beyene, Asfaw; Venturini, Mauro

doi:10.1016/j.apenergy.2014.01.074

Cited by 171 publications

(55 citation statements)

References 117 publications

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“…Those are based on steady or unsteady (dynamic) models. The reader is referred to the work of Ziviani et al [65], who presented an extended review of the modelling tools employed in the design of ORC systems. Linke et al [66] reviewed the approaches developed by researchers for the systematic selection of working fluids and the design, integration and control of ORCs.…”

Section: R 143amentioning

confidence: 99%

Small Scale Organic Rankine Cycle (ORC): A Techno-Economic Review

et al. 2017

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Abstract:The Organic Rankine Cycle (ORC) is widely considered as a promising technology to produce electrical power output from low-grade thermal sources. In the last decade, several power plants have been installed worldwide in the MW range. However, despite its market potential, the commercialization of ORC power plants in the kW range did not reach a high level of maturity, for several reasons. Firstly, the specific price is still too high to offer an attractive payback period, and secondly, potential costumers for small-scale ORCs are typically SMEs (Small-Medium Enterprises), generally less aware of the potential savings this technology could lead to. When it comes to small-scale plants, additional design issues arise that still limit the widespread availability of the technology. This review paper presents the state of the art of the technology, from a technical and economic perspective. Working fluid selection and expander design are illustrated in detail, as they represent the bottleneck of the ORC technology for small-scale power production. In addition, a European market analysis is presented, which constitutes a useful instrument to understand the future evolution of the technology.

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Section: R 143amentioning

confidence: 99%

Small Scale Organic Rankine Cycle (ORC): A Techno-Economic Review

et al. 2017

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“…Power Working Fluid [7] ORC with a scroll expander Amesim 1.5 kW (mechanical) R245fa [8] ORC for CHP with a volumetric expander Matlab with RefProp 207 kW (output) R152a, R1234yf, R245fa [9] Dynamic ORC model with a turbine Matlab (Simulink) 8 MW (net power) Isobutene and R134a [10] ORC with a scroll expander EES 1.8 kW (mechanical) HCFC-123 [11] Dynamic ORC model with a turbine Modelica and Dymola 100 kW R245fa [12] ORC with a scroll expander Amesim 2.16 kW (mechanical) R245fa [13] Scroll expander -260 W (mechanical) Air and ammonia [14] Sliding vane rotary expander -2 kW (mechanical) R236fa [15] Reciprocating expander WAVE Ricardo Software and EES 2.26 kW (output) Water [16] Scroll expander Matlab with Refprop 2 kW (mechanical) Several fluids [17] Scroll expander -1.8 kW (mechanical) At present, some studies try to adapt this technology to waste heat recovery (WHR) on vehicle ICEs. WHR technologies seem to assume an essential role in the new regulations of the forthcoming decade.…”

Section: Referencesmentioning

confidence: 99%

Modeling and Experimental Validation of a Volumetric Expander Suitable for Waste Heat Recovery from an Automotive Internal Combustion Engine Using an Organic Rankine Cycle with Ethanol

et al. 2016

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Waste heat recovery (WHR) in exhaust gas flow of automotive engines has proved to be a useful path to increase the overall efficiency of internal combustion engines (ICE). Recovery potentials of up to 7% are shown in several works in the literature. However, most of them are theoretical estimations. Some present results from prototypes fed by steady flows generated in an auxiliary gas tank and not with actual engine exhaust gases. This paper deals with the modeling and experimental validation of an organic Rankine cycle (ORC) with a swash-plate expander integrated in a 2 L turbocharged petrol engine using ethanol as working fluid. A global simulation model of the ORC was developed with a maximum difference of 5%, validated with experimental results. Considering the swash-plate as the main limiting factor, an additional specific submodel was implemented to model the physical phenomena in this element. This model allows simulating the fluid dynamic behavior of the swash-plate expander using a 0D model (Amesim). Differences up to 10.5% between tests and model results were found.

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“…There is a lot of debates proving that this waste heat recovery energy as a practical resource of a growing attention due to its large quantity [3]. Heat Recovery Steam Generators (HRSGs) is one type of steam-based recuperative system that have been used on various applications but are not generally fit to be applied in smaller gas turbines engine due to problems of weight as well as supply of water [4].…”

Section: Introductionmentioning

confidence: 99%

An analytical study on the performance of the organic Rankine cycle for turbofan engine exhaust heat recovery

Saadon

Talib

2016

IOP Conf. Ser.: Mater. Sci. Eng.

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To increase the energy efficiency and reduce the fuel consumption, waste heat recovery is a significant method for energy saving. The organic Rankine cycle (ORC) has great potential to recover the waste heat from the core jet exhaust of a turbofan engine and use it to produce power. Preliminary study of the design concept and thermodynamic performance of this ORC system would assist researchers to predict the benefits of using the ORC system to extract the exhaust heat engine. In addition, a mathematical model of the heat transfer of this ORC system is studied and developed. The results show that with the increment of exhaust heat temperature, the mass flow rate of the working fluid, net power output and the system thermal efficiency will also increase. Consequently, total consumption of jet fuel could be significantly saved as well.

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Advances and challenges in ORC systems modeling for low grade thermal energy recovery

Cited by 171 publications

References 117 publications

Small Scale Organic Rankine Cycle (ORC): A Techno-Economic Review

Small Scale Organic Rankine Cycle (ORC): A Techno-Economic Review

Modeling and Experimental Validation of a Volumetric Expander Suitable for Waste Heat Recovery from an Automotive Internal Combustion Engine Using an Organic Rankine Cycle with Ethanol

An analytical study on the performance of the organic Rankine cycle for turbofan engine exhaust heat recovery

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