Development of an automated design and off-design radial turbine model for solar organic Rankine cycle coupled to a parabolic trough solar collector

Alshammari, Fuhaid; Khedher, Nidhal Ben; Said, Lotfi Ben

doi:10.1016/j.applthermaleng.2023.120677

Cited by 6 publications

(6 citation statements)

References 42 publications

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“…As shown in the flowchart of the design process, the nozzle exit absolute velocity C 3 is found in an iterative manner. The static enthalpy h 3 is then found using Equation (23). The remaining thermodynamic properties of the working fluid are calculated, as shown in Equation (24).…”

Section: Volute Modelingmentioning

confidence: 99%

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Potential of Variable Geometry Radial Inflow Turbines as Expansion Machines in Organic Rankine Cycles Integrated with Heavy-Duty Diesel Engines

Alshammari,

Alghafis,

Alatawi

et al. 2023

Applied Sciences

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This work evaluates the feasibility of utilizing an organic Rankine cycle (ORC) for waste heat recovery in internal combustion engines to meet the stringent regulations for reducing emissions resulting from the combustion of fossil fuels. The turbine is the most crucial component of the ORC cycle since it is responsible for power production. In this study, a variable geometry radial inflow turbine is designed to cope with variable exhaust conditions. A variable geometry turbine is simply a radial turbine with different throat openings: 30, 60, and 100%. The exhaust gases of a heavy-duty diesel engine are utilized as a heat source for the ORC system. Different engine operating points are explored, in which each point has a different exhaust temperature and mass flow rate. The results showed that the maximum improvements in engine power and brake specific fuel consumption (BSFC) were 5.5% and 5.3% when coupled to the ORC system with a variable geometry turbine. Moreover, the variable geometry turbine increased the thermal efficiency of the cycle by at least 20% compared to the system with a fixed geometry turbine. Therefore, variable geometry turbines are considered a promising technology in the field and should be further investigated by scholars.

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Section: Volute Modelingmentioning

confidence: 99%

“…Therefore, the aim of this study is to shed more light on the design process of the turbine and explore its efficacy in improving heavy-duty diesel engines in terms of power and BSFC. It is worth mentioning that the authors have published several studies on the design and optimization of fixed geometry radial inflow turbines [23].…”

Section: Introductionmentioning

confidence: 99%

Potential of Variable Geometry Radial Inflow Turbines as Expansion Machines in Organic Rankine Cycles Integrated with Heavy-Duty Diesel Engines

Alshammari,

Alghafis,

Alatawi

et al. 2023

Applied Sciences

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“…The initial portion of this project will focus on designing the Organic Rankine Cycle (ORC), choosing the fluid, and designing the essential components. The second half concentrates on setting up laboratory tests and the resulting outcomes [6,7]. Since the early 2000s, the scientific community has shown considerable interest in converting smaller-scale and lower-quality heat sources utilizing ORC [8].…”

Section: Introductionmentioning

confidence: 99%

Development and Evaluation of a Small-Scale Organic Rankine Cycle for CSP Integration

M K,

Babu D,

et al. 2024

E3S Web of Conf.

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The paper details the development, manufacturing, and evaluation of a compact Organic Rankine Cycle (ORC) system fueled by Concentrated Solar Power (CSP). The initial selection of the starting point of the cycle is described, considering the operational conditions of the ORC (such as the properties of the ambient temperature and solar field) and operational limitations. The study outlines the construction of a radial turbine generating 3 kW of power and conducts numerical simulations of fluid flow within the turbine components such as the nozzle and wheel. The course includes system engineering, focusing on the computation and selection of critical components including pumps, exchangers, and sensors. The findings of the laboratory tests are presented in the second part. The experiment utilized a thermal oil boiler for heating. The results show an isentropic efficiency of around 42% and a cycle efficiency of 6% under the initial test conditions, indicating promising performance over a wide range of pressure drops.

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“…In order to improve the actual turbine performance under the conditions of low temperature and pressure, the structural design and optimization of an OTEC radial inflow turbine should be studied. Some researchers have conducted 1D design [12][13][14][15], 3D-CFD simulation [16][17][18] and other analyses. Nithesh et al [19] adopted a comprehensive 1D meanline design method for a radial inflow turbine with a 2 kW output power and found that blade edge filleting is very important to improve blade performance.…”

Section: Introductionmentioning

confidence: 99%

Structural Design and Analysis of a 100 kW Radial Turbine for an Ocean Thermal Energy Conversion–Organic Rankine Cycle Power Plant

Feng,

Li,

Huang

et al. 2023

Processes

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In this paper, a 100 kW radial inflow turbine is designed for an ocean thermal energy conversion (OTEC) power plant based on the organic Rankine cycle (ORC) with ammonia as the working fluid. Based on one-dimensional (1D) and three-dimensional computational fluid dynamics (3D-CFD) modeling, the mechanical structure design, static and modal analyses of the turbine and its components are carried out to investigate its mechanical performance. The results show the stress and strain distribution in the volute, stator and rotor, and their maximum values appear, respectively, at the inlet cutout, the tip of the stator outlet and the connection position between the rotor and the shaft. After optimization, all the stresses in the above components are below the allowable values. The frequencies from the first order to the sixth order of the rotor and whole turbine were obtained through modal analysis without prestress and under prestress. The maximum frequency of the rotor and whole turbine is 707.75 Hz and 40.22 Hz, both of which are far away from the resonance frequency range that can avoid resonance. Therefore, the structure of the designed turbine is safe, feasible and reliable so as to better guide actual production.

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Development of an automated design and off-design radial turbine model for solar organic Rankine cycle coupled to a parabolic trough solar collector

Cited by 6 publications

References 42 publications

Potential of Variable Geometry Radial Inflow Turbines as Expansion Machines in Organic Rankine Cycles Integrated with Heavy-Duty Diesel Engines

Potential of Variable Geometry Radial Inflow Turbines as Expansion Machines in Organic Rankine Cycles Integrated with Heavy-Duty Diesel Engines

Development and Evaluation of a Small-Scale Organic Rankine Cycle for CSP Integration

Structural Design and Analysis of a 100 kW Radial Turbine for an Ocean Thermal Energy Conversion–Organic Rankine Cycle Power Plant

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