Design of a Sustainable and Efficient Transportation Station (SETS) Based on Renewable Sources and Efficient Electric Drives

Kim, Myung Chin; Kim, Jeong-Tae; Bae, Sungwoo

doi:10.3390/sym8120146

Cited by 7 publications

(4 citation statements)

References 28 publications

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“…For that reason, analytic models are employed to establish paradigms, or distill the essential features of a physical system. For instance, the harmonic oscillator is widely used in many areas of physics, such as quantum optics, solid state physics, or molecular physics to describe modes of the electromagnetic field, lattice or molecular vibrations (see for example [1]). Within strong-field laser-matter interaction, the Gordon-Volkov solution [2,3] has been widely used approximate the electron dynamics by field-dressed plane waves.…”

Section: Introductionmentioning

confidence: 99%

“…The dearth of analytically solvable models in physics has led to the development of quasiexactly solvable (QES) analytical models [11,12]. The QES exploit the fact that Hamiltonian operator (from a quasi-exact subclass) may be represented as an infinite dimensional block diagonal matrix 1 , hence allowing to explicitly find a certain subset of all eigenfunctions and eigenvalues by diagonalising one of the finite-dimensional blocks [11]. Unfortunately, QES may be of limited practical use.…”

Section: Introductionmentioning

confidence: 99%

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Alternative quantisation condition for wavepacket dynamics in a hyperbolic double well

Kufel

Chomet

Faria

2020

J. Phys. A: Math. Theor.

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We propose an analytical approach for computing the eigenspectrum and corresponding eigenstates of a hyperbolic double well potential of arbitrary height or width, which goes beyond the usual techniques applied to quasi-exactly solvable models. We map the time-independent Schrödinger equation onto the Heun confluent differential equation, which is solved by using an infinite power series. The coefficients of this series are polynomials in the quantisation parameter, whose roots correspond to the system’s eigenenergies. This leads to a quantisation condition that allows us to determine a whole spectrum, instead of individual eigenenergies. This method is then employed to perform an in depth analysis of electronic wave-packet dynamics, with emphasis on intra-well tunneling and the interference-induced quantum bridges reported in a previous publication Chomet et al (2019 New J. Phys. 21 123004). Considering initial wave packets of different widths and peak locations, we compute autocorrelation functions and Wigner quasiprobability distributions. Our results exhibit an excellent agreement with numerical computations, and allow us to disentangle the different eigenfrequencies that govern the phase-space dynamics.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Alternative quantisation condition for wavepacket dynamics in a hyperbolic double well

Kufel

Chomet

Faria

2020

J. Phys. A: Math. Theor.

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“…It can be seen that some of the EEMs and corresponding requirements used in APBs are not applicable to UMSs due to their unique geographical conditions, such as the use of natural lighting and shading measures. But UMSs also have unique advantages that they can take advantage of, especially the use of the heat emitted by train movement [41][42][43] and the piston wind [44][45][46], for example, the capillary heat exchanger [47], the adjustable platform screen door system [48] and the tunnel wind energy harvesting system [49]. Furthermore, although studies investigated various forms of energy utilization in UMSs, there is still no unified evaluation method in terms of cost-benefit analysis [50].…”

Section: Alternative Itemsmentioning

confidence: 99%

Exploring the Applicability of Building Energy Performance Certification Systems in Underground Stations in China

You

Wei

et al. 2022

Sustainability

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To improve the energy efficiency of underground metro stations, and in view of the absence of a comprehensive energy performance evaluation system for underground stations, this study introduced building Energy Performance Certification (EPC) tools into underground stations and conducted a comparative analysis of their applicability. The findings indicated that due to the unique characteristics of underground stations, China’s current EPC system was inapplicable to them. Specifically, (1) for basic items, although evaluation methods were available, due to the limited energy use data for the statistical method, the self-reference method was preferred, but its calculation encountered issues with missing reference values; (2) for prescribed items, the emphasis should be placed on the energy efficiency requirements of energy use systems rather than those of the thermal performance of envelopes; (3) for alternative items, the energy recovery measures related to the heat dissipation of trains and the piston wind should be addressed. Furthermore, a case study was conducted for verification of the proposed energy evaluation method, and the EPC system was updated based on the results of the comparison. The authors hope that this study will help improve China’s energy evaluation methods for underground stations and serve as a reference for expanding the EPC system to include public transportation buildings.

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“…Therefore, energy management sources need to be studied along with the optimal FCSs for providing the energy of each source in the charging process of EVs. At present, photovoltaic (PV) power plants are of interest for providing energy [14]. PVs can be integrated into a radial distribution system (RDS) to reduce the total power loss of the electrical power system, as presented in [1,15].…”

Section: Introductionmentioning

confidence: 99%

Optimal Placement of Distributed Photovoltaic Systems and Electric Vehicle Charging Stations Using Metaheuristic Optimization Techniques

et al. 2021

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In this study, the concept of symmetry is introduced by finding the optimal state of a power system. An electric vehicle type load is present, where the supply stores’ electrical energy causes an imbalance in the system. The optimal conditions are related by adjusting the voltage of the bus location. The key variables are the load voltage deviation (LVD), the variation of the load and the power, and the sizing of the distributed photovoltaic (DPV), which are added to the system for power stability. Here, a method to optimize the fast-charging stations (FCSs) and DPV is presented using an optimization technique comparison. The system tests the distribution line according to the bus grouping in the IEEE 33 bus system. This research presents a hypothesis to solve the problem of the voltage level in the system using metaheuristic algorithms: the cuckoo search algorithm (CSA), genetic algorithm (GA), and simulated annealing algorithm (SAA) are used to determine the optimal position for DPV deployment in the grid with the FCSs. The LVD, computation time, and total power loss for each iteration are compared. The voltage dependence power flow is applied using the backward/forward sweep method (BFS). The LVD is applied to define the objective function of the optimization techniques. The simulation results show that the SAA showed the lowest mean computation time, followed by the GA and the CSA. A possible location of the DPV is bus no. 6 for FCSs with high penetration levels, and the best FCS locations can be found with the GA, with the best percentage of best hit counter on buses no. 2, 3, 13, 14, 28, 15, and 27. Therefore, FCSs can be managed and handled in optimal conditions, and this work supports future FCS expansion.

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Design of a Sustainable and Efficient Transportation Station (SETS) Based on Renewable Sources and Efficient Electric Drives

Cited by 7 publications

References 28 publications

Alternative quantisation condition for wavepacket dynamics in a hyperbolic double well

Alternative quantisation condition for wavepacket dynamics in a hyperbolic double well

Exploring the Applicability of Building Energy Performance Certification Systems in Underground Stations in China

Optimal Placement of Distributed Photovoltaic Systems and Electric Vehicle Charging Stations Using Metaheuristic Optimization Techniques

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