Design Optimization of A Small Scale High Expansion Ratio Organic Vapour Turbo Expander for Automotive Application

Ying, Qiyu; Zhuge, Weilin; Zhang, Yangjun; Zhang, Lei

doi:10.1016/j.egypro.2017.09.185

Cited by 5 publications

(3 citation statements)

References 8 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Indeed CFD can play an important role in understanding the behaviour of turboexpanders at various operating conditions. For example Ying et al [38], with the help of CFD, studied several geometry modifications in order to learn their influence on turbine performance. Sam et al [39] studied the flow field of a high-speed helium turboexpander by means of three-dimensional transient flow analysis using Ansys CFX.…”

Section: Introductionmentioning

confidence: 99%

Fast Design Procedure for Turboexpanders in Pressure Energy Recovery Applications

et al. 2020

View full text Add to dashboard Cite

Sustainable development can no longer neglect the growth of those technologies that look at the recovery of any energy waste in industrial processes. For example, in almost every industrial plant it happens that pressure energy is wasted in throttling devices for pressure and flow control needs. Clearly, the recovery of this wasted energy can be considered as an opportunity to reach not only a higher plant energy efficiency, but also the reduction of the plant Operating Expenditures (OpEx). In recent years, it is getting common to replace throttling valves with turbine-based systems (tuboexpander) thus getting both the pressure control and the energy recovery, for instance, producing electricity. However, the wide range of possible operating conditions, technical requirements and design constrains determine highly customized constructions of these turboexpanders. Furthermore, manufacturers are interested in tools enabling them to rapidly get the design of their products. For these reasons, in this work we propose an optimization design procedure, which is able to rapidly come to the design of the turboexpander taking into account all the fluid dynamic and technical requirements, considering the already obtained achievements of the scientific community in terms of theory, experiments and numeric. In order to validate the proposed methodology, the case of a single stage axial impulse turbine is considered. However, the methodology extension to other turbomachines is straightforward. Specifically, the design requirements were expressed in terms of maximum allowable expansion ratio and flow coefficient, while achieving at least a minimum assigned value of the turbine loading factor. Actually, it is an iterative procedure, carried out up to convergence, made of the following steps: (i) the different loss coefficients in the turbine are set-up in order to estimate its main geometric parameters by means of a one dimensional (1D) study; (ii) the 2D blade profiles are designed by means of an optimization algorithm based on a “viscous/inviscid interaction” technique; (iii) 3D Computational Fluid Dynamic (CFD) simulations are then carried out and the loss coefficients are computed and updated. Regarding the CFD simulations, a preliminary model assessment has been performed against a reference case, chosen in the literature. The above-mentioned procedure is implemented in such a way to speed up the convergence, coupling analytical integral models of the 1D/2D approach with accurate local solutions of the finite-volume 3D approach. The method is shown to be able to achieve consistent results, allowing the determination of a turbine design respectful of the requirements more than doubling the minimum required loading factor.

show abstract

Section: Introductionmentioning

confidence: 99%

Fast Design Procedure for Turboexpanders in Pressure Energy Recovery Applications

et al. 2020

View full text Add to dashboard Cite

show abstract

“…In the one-way FSI, the CFD results are transferred to the structural analysis by one-way coupling, while in two-way FSI, the deformations in the structure obtained from the transfer of the CFD results are fed back to the CFD environment, to determine the deviation in the flow created as a result of the structural deformation [3]. Several researchers [4][5][6][7][8] studied the effect of FSI on radial forces, pressure distribution, equivalent stress, and rotor deflection in a centrifugal compressor and pump. Zhao et al [9] suggested that the complete compressor performance analysis should involve both fluid and solid mechanics and found that the fluid pressure influences the von Mises stress significantly.…”

Section: Introductionmentioning

confidence: 99%

“…Similarly, to acquire a superior design, a reasonable compromise between the aerodynamic, stress, and rotor dynamics is needs to be found. Depending on the mechanical design criteria, the model with the lowest overall von Mises nodal stress has been sought to determine the best impeller design [5,15]. The structural part deforms due to the pressure or temperature load from the fluid domain.…”

Section: Introductionmentioning

confidence: 99%

Aerodynamic and Structural Characteristics of a Centrifugal Compressor Impeller

2019

View full text Add to dashboard Cite

The present study focuses on the aerodynamic performance and structural analysis of the centrifugal compressor impeller. The performance characteristics of the impeller are analyzed with and without splitter blades by varying the total number of main and splitter blades. The operating conditions of the compressor under centrifugal force and pressure load from the aerodynamic analysis are applied to the impeller blade and hub to perform the one-way Fluid–Structure Interaction (FSI). For the stress assessment, maximum equivalent von Mises stresses in the impeller blades are compared with the maximum allowable stress of the impeller material. The effects of varying the pressure field on the deformation and stress of the impeller are also calculated. The aerodynamic and structural performance of the centrifugal compressor at 73,000 rpm are investigated in terms of the efficiency, pressure ratio, equivalent von Mises stress, and total deformation of the impeller.

show abstract

Flow characteristic analysis under variable conditions in a hydrogen turbo-expander for a 5 t/d hydrogen liquefier

Zhou,

Qu,

Zhang

et al. 2024

International Journal of Hydrogen Energy

View full text Add to dashboard Cite

Design Optimization of A Small Scale High Expansion Ratio Organic Vapour Turbo Expander for Automotive Application

Cited by 5 publications

References 8 publications

Fast Design Procedure for Turboexpanders in Pressure Energy Recovery Applications

Fast Design Procedure for Turboexpanders in Pressure Energy Recovery Applications

Aerodynamic and Structural Characteristics of a Centrifugal Compressor Impeller

Flow characteristic analysis under variable conditions in a hydrogen turbo-expander for a 5 t/d hydrogen liquefier

Contact Info

Product

Resources

About