Three dimensional optimization of small-scale axial turbine for low temperature heat source driven organic Rankine cycle

Jubori, Ayad M. Al; Al-Dadah, Raya; Mahmoud, Saad; Ennil, A.S. Bahr; Rahbar, Kiyarash

doi:10.1016/j.enconman.2016.10.060

Cited by 46 publications

(16 citation statements)

References 35 publications

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“…SST

k - ω

model is a mixture of the Wilcox

k - ω

model and the standard

k - ε

model; Jubori et al used the SST model for the CFD study of a turbine in an organic Rankine cycle. The same was adopted by Sam et al for the improvement of flow structures within the nozzle of radial turbo expander.…”

Section: Simulation Basismentioning

confidence: 99%

“…The maximum power output and entropic efficiency were 400 kW and 88.45%, respectively, with a blade speed ratio of 0.711, which was slightly above the optimum value of 0.7. Jubori et al used the multiobjective genetic algorithm (MOGA) optimization technique to achieve optimal turbine design and maximum cycle efficiency. The CFX simulation was carried out using six suitable low‐temperature working fluids.…”

Section: Introductionmentioning

confidence: 99%

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Simulation study on the flow field of guide vane and impeller of turbo expander

Liu

Wang

Zhang

et al. 2019

Energy Science & Engineering

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In the face of the current energy shortage, organic Rankine cycle (ORC) technology is a way to make efficient use of energy, especially geothermal energy. As the core component of an ORC system, a turbo expander can achieve a high conversion efficiency for geothermal energy and has good development prospects. For low temperature geothermal energy such as 95°C water, R245fa could be chosen as the working fluid. Through preliminary thermal calculations and the MATLAB programming method, the main thermal performance parameters and the aerodynamic parameters, structural parameters, and three‐dimensional modeling of the guide vane and impeller were obtained. The design of the turbo expander was modeled and meshed by the Workbench module using the ANSYS software, and the internal flow path of the expander was numerically simulated by the CFX module. The results showed that there was a small range of wake loss at the trailing edge of the vane flow; impact loss and wake loss occurred at the leading and trailing edges of the impeller blades. At the 30% relative chord strength of the impeller, there was excessive expansion, resulting in a local low‐pressure area and a secondary flow from the hub to the rim.

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“…SST

k - ω

model is a mixture of the Wilcox

k - ω

model and the standard

k - ε

Section: Simulation Basismentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Simulation study on the flow field of guide vane and impeller of turbo expander

Liu

Wang

Zhang

et al. 2019

Energy Science & Engineering

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“…The results showed that the AFT was competitive to the RIT at the mass flow rate of 0.5 kg/s with the maximum ORC efficiency of 10.60% based on the RIT compared with 10.14% based on the AFT. Al Jubori et al (2017a) also developed a new methodology that integrated small-scale ORC system modelling with 1D, 3D CFD analysis and optimization of the singlestage AFT based on a multi-objective genetic algorithm (MOGA). As the working fluids, six organic fluids were investigated.…”

Section: Introductionmentioning

confidence: 99%

New performance maps for selecting suitable small-scale turbine configuration for low-power organic Rankine cycle applications

Jubori

Al-Dadah

Mahmoud

2017

Journal of Cleaner Production

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“…Palumbo et al [100] published the mathematical model of a radial outflow turbine. Jubori et al [101] and Lazzaretto and Manente [102] derived a model for the design of axial turbines in ORC applications. However, the aforementioned studies have not been validated against experimental data.…”

Section: Expander Selectionmentioning

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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Three dimensional optimization of small-scale axial turbine for low temperature heat source driven organic Rankine cycle

Cited by 46 publications

References 35 publications

Simulation study on the flow field of guide vane and impeller of turbo expander

Simulation study on the flow field of guide vane and impeller of turbo expander

New performance maps for selecting suitable small-scale turbine configuration for low-power organic Rankine cycle applications

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

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