Abstract. Since the energy demand increases, the sources of fluid energy such as wind energy and marine energy have attracted widespread attention, especially vortex-induced vibrations (VIV) excited by wind energy. This paper proposes a wind energy harvesting device-based VIV concept. The proposed device converts the mechanical

Abstract: The optimization of the train speed trajectory and the traction power supply system (TPSS) with hybrid energy storage devices (HESDs) has significant potential to reduce electrical energy consumption (EEC).

BEVs are driven by the electric motor that gets power from the energy storage device. The driving range of BEVs depends directly on the capacity of the energy storage device [30].A conventional electric motor propulsion system of BEVs consists of an electric motor, inverter and the energy storage device that mostly adopts the power

To date, various energy storage technologies have been developed, including pumped storage hydropower, compressed air, flywheels, batteries, fuel cells, electrochemical capacitors (ECs), traditional capacitors, and so on (Figure 1 C). 5 Among them, pumped storage hydropower and compressed air currently dominate global

Reusing regenerative energy from braking to charge storage devices with optimal speed profiles attained 26.77% and 27.36% energy savings in scenarios 4 and

The storage devices featured 600 Wh and 180 kW of rated energy and power, with a total weight of 430 kg and consequent specific energy and power of 1.4 Wh/kg and 418 W/kg, respectively.

Description of Technology. VFDs reduce electrical energy use by adjusting motor speed to match the system-required load. VFDs eliminate the need for other types of energy-wasting devices, such as outlet dampers or pressure control valves, that serve a similar control function but do so by dissipating energy. VFDs control the rotational speed of

The conventional design of belt conveyor systems usually focuses on their mechanical parameters. In this paper, this design is reconsidered aiming at an improved energy efficiency. To this end, it is essential to consider the entire electromechanical system - from the belt to the electrical power supply. All these system components are

In this Review we discuss on-going efforts towards energy-ef ficient spintronic devices related to ICTs, incoming technologies, and open ques-tions. We start our discussion with a summary of

The beam pumping units applied in oilfield for more than 150 years, because it had the advantages of simple structure, reliable and durable. At present, it is still one of the most important artificial lift methods in the world. Due to the inherent structure of the beam pumping units, the balanced torque curve of gearbox has a bigger fluctuation

Considering both dwelling at stations and running in the inter-station sections, the paper proposes an integrated optimization model for reducing net energy consumption from the

Section 7 summarizes the development of energy storage technologies for electric vehicles. 2. Energy storage devices and energy storage power systems for BEV Energy systems are used by batteries, supercapacitors, flywheels, fuel

On-board energy storage device is considered in speed profile optimization to reduce energy consumption. • Increased train mass is taken into account with installation of onboard energy storage device. • Relevant running time is adjusted to maximize regenerative

Integrating the electrochromic (EC) with energy storage devices (EC-ESDs) can considerably drop the energy-storing cost. In this direction, Nickel oxide (NiO) is considered a potential electrode material for EC devices owing to its superior coloration efficiency (CE), wide dynamic range, excellent cycling capability, and cost-effectiveness.

The Zn anode-based electrochromic energy storage devices (EESDs) provide a promising strategy to overcome the contradiction of electrochromism and energy storage for efficient devices. In this regard, the device configuration can endow the electrochromic devices with superior electrochromic performance and excellent energy

The paper presents a control strategy for the system of belt conveyors with adjustable speed drives based on fuzzy logic control. The proposed control structure is developed and tested on the detailed mathematical model of the drive system with the rubber belt. The presented algorithm is implemented on the new variable speed belt conveyor system

6.5 Conclusions. This chapter tackles the application of energy storage systems in railways to maximise the use of regenerated energy and the influence in train efficient-driving. The main technologies applied, the modelling of these energy storage systems and its control has been discussed.

In this paper, a small power generation energy storage test device based on pneumatic motor and compressed air is built. The effects of regulator valve pressure and electronic load current on temperature difference, pressure difference, expansion ratio, rotating speed, torque, power output of pneumatic motor, and efficiency

The improvement of the energy efficiency of belt conveyor systems can be achieved at equipment and operation levels. Specifically, variable speed control, an

According to the viscoelastic characteristics and the resistance effect, the speed of conveyor belt is not changed immediately. Hence, the speed of the belt could be assumed to be constant because the two frame interval for Δt = t k+ 1 − t k is quite short, where Δt = 1/(f speed − 1). 1).

In this paper, an optimal switching control and a variable speed drive (VSD) based optimal control are proposed to improve the energy efficiency of belt conveyor

Because the coal storage ability of the silo can transform the electricity used by BC into the coal potential energy, which acts as a similar role with the traditional battery energy storage system. Hence, the BC, silo and train shown in Fig. 1 are constructed as a VES, whose input is the Q t and output is the Q train, t .

This device shows synergic performance of solar energy harvest and storage, as well as light and thermal transmission control. Dense and mesoporous WO 3 thin films are incorporated as electrochromic and energy storage layer. The device with mesoporous WO 3 film exhibits modulation of ∼40% in visible light range and ∼50% in

1. Introduction With the high demand in the sphere of electrochemical energy storage technologies for stationary and transportation applications, the ESD, i.e. secondary batteries are the best choice. They are safe,

With the rapid development of energy storage devices (ESDs), this paper aims to develop an integrated optimization model to obtain the speed trajectory with the constraint of on

This new stretchable device is portable, has a high operation potential (up to 1.8 V), a long life, high self-charging efficiency, and a high rate-capability. Its self-power conversion/storage efficiency is unprecedented at 13.3%. Additionally, an 89.34% retention capacity can be obtained after 100 cycles, and a surprisingly low-capacity decay

The storage devices featured 600 Wh and 180 kW of rated energy and power, with a total weight of 430 kg and consequent specific energy and power of 1.4 Wh/kg and 418 W/kg, respectively. Experimental tests on the catenary/EDLC hybrid units showed a modest 1.6% reduction in the peak power demand from the overhead wire during

On-board energy storage device is considered in speed profile optimization to reduce energy consumption. Increased train mass is taken into account with installation of onboard energy storage device. Relevant running time is adjusted to maximize regenerative energy and guarantee transit capacity.

Electric traction system is the most energy efficient traction system in railways. Nevertheless, not all railway networks are electrified, which is due to high maintenance and setup cost of overhead lines. One solution to the problem is battery-driven trains, which can make the best use of the electric traction system while avoiding the high costs of the

Thus, the need of energy storage devices is reduced since every time regenerative braking power is generated, there is one available load that can absorb it. This approach has been widely studied in many works and in light railways [[20], [21], [22]] it

The objective of this research was to optimize the number of locations of the energy storage devices and speed profiles. First, kinematic equations were applied to simulate energy consumption. Then, a genetic algorithm (GA) was developed to optimize the speed profiles that minimize the energy consumption with and without a wayside energy

The objective of this research was to optimize the number of locations of the energy storage devices and speed profiles. First, kinematic equations were applied to

Aiming at reducing high energy consumption in the rated-speed operation of a belt con-veyor, the present paper establishes an energy-saving belt-speed model of a belt

The energy efficiency of belt conveyor systems can be improved at equipment or operational levels. In literature, variable speed control is proposed as an effective way to improve operation efficiency of belt conveyors. However, the current strategies most focus on lower control loops without considerations at the system level. In this paper, an optimal

Speed control is used to improve the energy efficiency of belt conveyors on handling bulk solid materials. • The ECO method is proposed to determine the

With the increasing application of railway transportation, energy consumption of railway transportation rises dramatically, which in turn undermines its sustainability. Optimization on train speed profile and use of regenerative energy is becoming a feasible and applicable approach to achieve an energy-efficient operation without changing existing

In literature, variable speed control of belt conveyors is recommended to save energy consumption. However, the current implementations mostly focus on lower level control loops without operational considerations at the system level. This paper intends to take a model based optimization approach to improve the operation efficiency of belt

Application of hybrid energy storage devices in multi-speed BEV. The intention of this paper is to cover a wide range of configurations for BEVs considering both transmission arrangements and various forms of energy storage. To achieve this the remainder of the papers is divided into the following chapters: 1) the alternative

1. Introduction Harvesting and storing energy is a key problem in some occasions [1], [2], [3].Let us consider the most widely applied form of energy—electricity—as an example. An electrical grid can meet most needs

Focusing on the energy-conservation train operation issues, this paper proposes an effective real-time train regulation scheme for metro systems with energy storage devices. Specifically, to minimize train timetable deviation, passenger waiting and energy consumption, we formulate a mixed-integer nonlinear programming model to