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Influence of secondary source technologies and energy management strategies on Energy Storage System sizing for fuel cell electric vehicles Int J Hydrogen Energy, 43 ( Issue 25 ) ( 21 June 2018 ), pp. 11614 - 11628
uses liquid air or liquid nitrogen as energy storage media, hence also known as Liquid Air Energy Storage. The basic working principle of the CES is shown in Fig. 1, which includes air
The working device is the most important component of an excavator. It directly determines the longevity, stability, and economy of an excavator. With the Denavit–Hartenberg convention and the virtual
Aiming at the large hydraulic excavator of which the boom is driven by dual hydraulic cylinders, the principle of double hydraulic-gas energy storage cylinders driving the
Electrochemical energy storage devices such as supercapacitors attracting a significant research interest due to their low cost, highly efficient, better cyclic stability and reliability. The charge storage mechanism in supercapacitors are generally depends upon absorption/desorption of charges on electrode-electrolyte interface while
The aim of this article is to propose a control strategy for energy recovery system of hydraulic excavator driven by the parallel hybrid system. The mathematical
The first excavator was invented by Mr. William Smith Otis in the United States in 1837, which was powered by the steam at that time. The first swing mechanical excavator was invented in 1895, a milestone in the excavators history. The first hydraulic excavator was created in 1960s, in Germany, than it was introduced to Japan and other
Request PDF | On Jan 1, 2004, T. Nanjo and others published Power simulation for energy saving in hybrid excavator | Find, read and cite all the research you need on
With the increasing proportion of renewable energy in the power system, energy storage technology is gradually developed and updated. The mechanical elastic energy storage is a new physical energy storage technology, and its energy storage form is elastic potential energy. Compared with other physical energy storage forms, this kind of energy
Ge et al. [45, 46] proposed a ERS scheme with a hydraulic accumulator and an energy conversion cylinder as presented in Fig. 19. In this configuration, the ERS of the excavator''s
This paper presents an innovative powertrain design and an energy regeneration system for hybrid hydraulic excavators to reduce energy consumption and emissions. The proposed system is designed to maximize engine efficiency and make full use of the energy gained from boom and arm retraction. The powertrain features an
Construction machines are heavy-duty equipment and a major contributor to the environmental pollution. By using only electric motors instead of an internal combustion engine, the problems of low
Upon charging, hydrogen interacts with a metal (M) and forms a metal hydride (MH x) at the negative electrode (as represented in Eq. (1)).The formation of the MH x results from hydrogen absorption by the M (i.e., the host material in Fig. 2 a), which is a multi-step process and can be electrochemically reversed (Section S2).
Based on the descriptions of the working principle of the digital pump and the whole energy recovery system, the mathematical models of the digital pump, the
The hydraulic accumulator has the advantages of high power density, fast response, stable operation and high cost performance. However, compared with the electric energy storage method, the hydraulic accumulator has low energy density and large pressure fluctuation while absorbing and discharging energy, which severely limits its
Hybrid energy storage systems (HESSs), which combine energy- and power-optimised sources, seem to be the most promising solution for improving the overall performance of energy storage.
In the existing electric excavators, the energy efficiency of the hydraulic system is less than 30% due to a large amount of throttling loss and waste of potential energy. In order to improve excavator energy efficiency, an electric excavator scheme using a hydraulic-electric dual-power drive boom system is proposed. A linear actuator,
To reduce the energy consumption and emission, an innovative powertrain and the energy management strategy are proposed for hydraulic excavator in this paper. The novel powertrain consists of the engine, motor/generator, planetary gear, gearbox, and variable hydraulic pump. The energy regeneration system is also applied on the system
Energy regeneration and energy reuse of drive mode are important for deciding the energy-saving efficiency. The existing research has not optimized energy working points, considering pump
Table 2. Some thermodynamical values of nitrogen and argon relevant for ESU purposes and typical volume and mass for a 1800 J energy storage unit working at the triple point. The minimum cell volume, Vmin, is calculated as 1800 J = VminLSL ( LSL: volumic Solid–Liquid latent heat). Empty Cell.
Mobile machinery energy efficiency and emission pollution are the national and worldwide issues. This paper contributes in solving these problems by applying a speed variable power source. Unfortunately, almost all of the speed variable systems have the dynamic response problem when the motor starts with full load or heavy load. To address
1. Introduction. With increasingly stringent emission regulations and energy shortage, it is necessary to make the construction machinery, especially the widely used
Energies 2022, 15, 4757 3 of 17 storage component, the accumulator plays an important role in low processing cost and high power density, while the battery has the advantages of low power density and high energy storage density. However, the
When the energy storage hydraulic cylinder [10,11] or energy storage chamber [12][13] [14] is used to recover the gravitational potential energy, the gravity of the working device can also be
First, potential recoverable energy sources in excavator mechanisms are analyzed. Next, energy regeneration systems are classified according to energy storage
Schematic Diagram of Ground Principle Demonstration and Verification Test of Booster Storage Device. Figures - available via license: Creative Commons Attribution 3.0 Unported Content may be
Implementing an energy recovery system (ERS) is an effective solution to improve energy efficiency for hydraulic excavators (HEs). A flywheel energy recovery system (FERS) is proposed based on this concept. A hydraulic pump motor (PM) is employed as the energy conversion component and a flywheel is used as the energy
Excavator operator. Functions of an excavator operator: Make material start and load it in transport units. It also performs trenching, load handling, as well as demolition and breaking of blocks when a hydraulic hammer is incorporated. It can be adapted to different arm ranges, bucket capacities, soft or hard floors.
Hybrid technology applied to vehicles and construction machineries is one of the promising technologies to address environmental challenges. The energy storage
Some of the options for energy storage in energy regeneration Energies 2020, 13 devices include flywheels, compressed air, electrical energy storage systems (EESS), and hydraulic energy storage
The ESS (Energy Storage System) is very important in a hybrid system with ICE (Internal Combustion Engine) and motors/generators. Due to the different power requirements and ESEs (Energy Storing Element) used in hybrid systems, different structures of ESS are proposed. The goal of this paper is to give a review of the ESS in
The basic working principle of the novel series hybrid power is the engine drives the electric generator to provide average load power. Because of the severe load fluctuation, when the load is
This paper presents an innovative powertrain design and an energy regeneration system for hybrid hydraulic excavators to reduce energy consumption and
A novel energy regeneration swing system is proposed for hydraulic excavator in this paper to reduce the energy consumption. Two independent accumulators are proposed for use in the hybrid swing system. The combined control of hydraulic motor displacement and flow control valve and a variable accumulator control strategy were
The working principle of the system is analyzed in detail. The introduction of flow regeneration has two benefits; one is downsizing the displacement of PM and the
Based on the result 1.84/1.2842 = 1.4328, it can be concluded that the energy storage density of the TCA is 1.4328 times higher than that of conventional accumulators. This implies that the energy storage density has increased by 43.28 %. 3. Design of energy
Based on the structure and working principle of the digital pump, the mathematical model is established and three working modes are detailed. To verify the feasibility and correctness of control methods, a performance simulation testing platform including a digital pump, load module, hydraulic energy to be recovered, and controller
The energy storage system with higher power density, higher energy density, small size, long lifetime and low cost is essential for the hybrid system. This paper firstly analyzes the difference among the energy storing elements especially for battery and super capacitor (SC). Secondly, the advantages and disadvantages of different structures
As shown in Fig. 2, a speed controlled electric servo motor and accumulator are used to drive an asymmetric pump which has three ports this system, the servo motor is used to regulate the speed of the asymmetric fixed displacement pump. The ports A 1 and B 1 of this pump are directly connected to the single rod cylinder, and port C
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