Operational-driven optimal-design of a hyperloop system

Tudor, Denis; Paolone, Mario

doi:10.1016/j.treng.2021.100079

Cited by 11 publications

(16 citation statements)

References 13 publications

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“…where l mot is the length of the primary. Thanks to the linearity of the model (hypothesis 6), these two contributions can be then subtracted from the overall forces calculated through (10) and (11) for any operating point. Fig.…”

Section: J Constant Air Gap Compensationmentioning

confidence: 99%

“…COMSOL simulations of the distributions of Normal force and thrust for a single operating point (v m = 120 m s −1 , f s = 1323 Hz). The blue area is the force integral evaluated at the rear section of the LIM which is subtracted from the overall calculations of ( 10) and (11). The red area is the real force integral evaluated at the rear section of the LIM that is neglected with the proposed compensation method.…”

Section: Model Validationmentioning

confidence: 99%

“…v ≃ 100 m s −1 ) transportation applications [2]- [8]. A possible transportation application where LIMs are considered to be a potential candidate for the propulsion system is the Hyperloop [9]- [11]. As known, the Hyperloop concept envisages near-sonic speed transportation of people or freights, realized through capsules propelled by energy-efficient systems, into partially depressurized infrastructures, with the main goal of disrupting intracontinental flights by increasing the energy efficiency of longdistance journeys [12].…”

Section: Introductionmentioning

confidence: 99%

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Pseudo-Three-Dimensional Analytical Model of Linear Induction Motors for High-Speed Applications

Rametti,

Pierrejean,

Hodder

et al. 2024

IEEE Trans. Transp. Electrific.

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Literature on linear induction motors (LIMs) has proposed several approaches to model the behavior of such devices for different applications. In terms of accuracy and fidelity, field analysis-based models are the most relevant. Closedform or numerical solutions can be derived, based on the complexity of the model and the underlying hypotheses. In terms of simplicity, equivalent circuit-based models are the most effective, since they can be easily integrated into optimization frameworks. To the best of the authors' knowledge, the literature has not yet provided a computationally efficient LIM analytical model that considers the main characteristics of this type of motor altogether (i.e. finite motor length, magnetomotive force (mmf) space harmonics, slot effect, edge effect, and tail effect) and that is numerically and experimentally validated, especially at high speed (i.e. v ≃ 100 m s −1 ). Within this context, this paper proposes a field analysis-based pseudo-three-dimensional model of LIMs that explicitly takes into account the above-mentioned effects. The derived closed-form solution makes the model computationally more effective than traditional f.e.m. models and, therefore, suitable to be coupled with optimization frameworks for optimal LIM design. The performance and accuracy of the proposed model are assessed through numerical simulations and experimental measurements, carried out by means of a dedicated test bench.

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Section: J Constant Air Gap Compensationmentioning

confidence: 99%

Section: Model Validationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Pseudo-Three-Dimensional Analytical Model of Linear Induction Motors for High-Speed Applications

Rametti,

Pierrejean,

Hodder

et al. 2024

IEEE Trans. Transp. Electrific.

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show abstract

“…Specifically, the following aspects are considered: i) airport catchment areas, ii) flight frequency, iii) access times, and iv) travel costs to assess a possible change in airport competition if a Hyperloop service is introduced. Another research concerns the development and design of the Hyperloop system from a technical perspective; specifically, the following aspects are addressed: (i) optimal pressure inside a tube to minimize energy; (ii) minimum amount of energy per passenger and per km; (iii) relationship between infrastructure operation and capsule design; and (iv) possible magnetic levitation system for energy consumption reduction (Tudor and Paolone, 2021). The work of van Goeverden et al (2018) aims to fill the gap in the technical literature by exploring the operational, financial, and socialenvironmental performance of the Hyperloop system and comparing it to that of the High-Speed Rail -HSR and Air Passenger Transport -APT systems.…”

Section: Introductionmentioning

confidence: 99%

Preliminary technical and economic analysis of a hyperloop line: case study from Italy

Borghetti¹

2023

European Transport/Trasporti Europei

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The future of mobility and transportation infrastructures has been heavily questioned during the last years. Today we are looking at how the mobility of people and goods will evolve in the coming years. With reference to this topic, Hyperloop has been at the core of the debate. Scientists and engineers believe that this technology is a great opportunity for the modern society. Nonetheless, it still presents several unsolved issues. The purpose of this work is to propose a methodology to perform technical and economic pre-feasibility studies related to the hyperloop system, with specific focus on transport demand analysis, transport sizing of the infrastructure and cost analysis of CAPEX - CAPital EXpenditure and OPEX - OPerating EXpense. For the evaluation of the potential demand, the paper refers to the Multinomial Logit model, calibrated through SP – Stated Preferences surveys. Once the Logit model has been calibrated, it is possible to envisage different scenarios, such as maximum transport demand or maximum revenue, which will be used for the subsequent design of the transport system. As far as the sizing is concerned, some technical parameters of the project are required, such as: length of the route, maximum speed, and acceleration. The combination of the scenarios defined through the calibration of the Logit model and the project parameters, allows to define several scenarios representing the potential performances of the analyzed system. Given the possible performances of the transport service, an analysis of costs and potential revenues that determines the most efficient solution can be carried out. In addition, parametric values per km can be used to define CAPEX and OPEX. The methodology illustrated above, has been applied to a case study in Italy of the Rome-Milan OD (Origin – Destination), as it is one of the national routes with the highest volume of traffic and the largest number of modal choices.

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“…The same cannot safely be said for vehicles travelling at high speeds in tunnels that have been evacuated to very low pressures, notwithstanding the existence of studies providing valuable guidance (e.g., Kauzinyte et al 2019 [2]). No operational systems of this type currently exist, although extensive effort continues to be devoted to assessing many aspects of them-e.g., Bizzozero, et al (2021) [3], Museros, et al (2021) [4], Nick and Sato (2020) [5], Tudor and Paolone (2021) [6]. Also, whereas various authors have addressed the aerodynamic behaviour in detail, most focus on flows local to the vehicle itself, usually with the primary purpose of reducing "form" drag-e.g., Braun et al (2017) [7], Chen et al (2012) [8], Opgenoord and Caplan (2018) [9] and Zhang (2012) [10].…”

Section: Introductionmentioning

confidence: 99%

High-Speed Vehicles in Low-Pressure Tunnels—Influence of Choked Flows

Vardy

2023

Applied Sciences

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The aerodynamics of high-speed vehicles in evacuated tunnels is studied with particular reference to the consequences of choked flow conditions at the tails of the vehicles. It is shown that this has a dominant influence on overall conditions (pressure, temperature, velocity). Together with the need for the evacuated tunnel system to be closed, the high speeds cause the aerodynamic behaviour to differ greatly from that in conventional railway tunnels. A key purpose of the paper is to assess the relative importance of a large range of parameters and, for clarity, this is completed by focussing on a single vehicle in a single tunnel that is closed at both ends. Consideration is then given to interactions between more than one vehicle and to a twin-tube tunnel configuration in which interactions occur between vehicles moving in opposite directions. The paper closes with a brief mention of system-dependent matters that need to be considered in addition to the generic parameters investigated herein.

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Operational-driven optimal-design of a hyperloop system

Cited by 11 publications

References 13 publications

Pseudo-Three-Dimensional Analytical Model of Linear Induction Motors for High-Speed Applications

Pseudo-Three-Dimensional Analytical Model of Linear Induction Motors for High-Speed Applications

Preliminary technical and economic analysis of a hyperloop line: case study from Italy

High-Speed Vehicles in Low-Pressure Tunnels—Influence of Choked Flows

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