This paper proposes a novel potential energy regeneration system (PERS) using a hydraulic accumulator and a valve–motor–generator for a hybrid hydraulic excavator (HHE).
Fig. 1 shows that the time required to regenerate the potential energy of the boom is approximately 3 s, while a typical working period is about 20 s. Moreover, the regeneration power changes quickly and periodically. The peak power is approximately 35 kW, while the average power is 15 kW.The total regeneration energy in one working cycle is approximately
Processes 2023, 11, 2459 3 of 20 saving ability, and proposed speed control are tested through the test rig. Conclusions are given in Section6. 2. Throttling Loss Energy-Regeneration Scheme
Then, consid-ering the energy recovery efficiency as well as the characteristics of the loader from the V-type duty cycle, the parameters for several major parts of the energy regeneration system
A new energy regeneration system for BLDC motor-driven electric vehicles has been proposed in [15] and found to increase the efficiency of the EV motor drives. Optimal scheduling of smart micro
braking in EVs driven by a BLDC motor using a hybrid energy storage system, which includes a battery, a super capacitor, an artificial neural network, and a PI controller is proposed in [ 8], and the energy regeneration efficiency as compared to a single-boost method. In the remainder of this study, the following sections are discussed.
At present, the hydraulic systems of electric forklifts and traditional internal combustion forklifts are mostly valve-controlled speed-regulation systems, which have large throttling losses and potential energy waste. To further improve the energy-saving ability of electric forklifts, the forklift''s common working conditions are analyzed in this paper. A
A new energy regeneration system for A BLDC motor driven electric vehicle (R. Palanisamy) 2989 For determining the switching sequence, first step is to convert the high and low signals from hall
Relief valves are widely used in industrial machinery. Due to the outlet of the relief valve being connected to the tank, the pressure drop of the relief valve is frequently equal to the inlet pressure. Accordingly, the energy loss of the relief valve is very high in some cases and this will worsen with an increase in the rated pressure of the hydraulic system. In order to
In summary, this research involved the development and evaluation of environment classification and energy regeneration systems to improve the automated control and energy-efficient actuation of
The Energy Efficiency Directive (EED) came into force in 2012 and is the most comprehensive directive on energy efficiency. The EED establishes a common framework of measures for improving energy efficiency throughout the European Union (EU) Member States and to ensure that the EU achieves its energy saving target of 20% by 2020.
Autospies says that they''ve gotten their hands on the first picture of "BMW regenerative brake technology in action on a USA model" (a 550i GT). Well, we''re interested in the technology, but
For construction machinery, energy regeneration is an effective measure to save energy. Combining the advantages of the battery and the hydraulic accumulator, a novel hybrid regeneration system is proposed for electric forklifts. The gravitational potential energy and braking energy can be regenerated by the hydraulic accumulator and the battery respectively
special energy regeneration system should be designed prop-erly to be able to work compatibly with both emulsion fluid and hydraulic oil. And more importantly, mutual contamina-tion between emulsion fluid and hydraulic oil must be strictly prohibited in this system. A novel energy regeneration system for emulsion pump tests is proposed and
Exoskeletons are limited by the amount of electrical energy on board which limits operating duration. A possible solution to increase the operating duration of exoskeletons is energy regeneration through regenerative braking. Existing exoskeletons with regenerative braking are limited by high transmission ratios and low backdrivability. This paper presents a novel energy
The control strategy for the energy regeneration system (ERS) is discussed. Simulations are carried out in AMESim to validate the effectiveness of the novel PERS. The results demonstrate that the dynamic performance of the PERS is close to that of a throttle-governing system. The efficiency of the PERS is about 58%.
18.2.1 Electrical regeneration properties. Electrical energy recovery systems are the dominant form of energy recovery due to the prevalence of hybrid and electric vehicles. They are, at their core, based on a motor/generator (electric machine) that either drives the vehicle or is driven by the kinetic energy of the moving vehicle.
HRPES was first proposed for hybrid hydraulic excavators (HHEs) [8], and soon the research on boom HRPES became a focus for the HHEs [9] fluenced by the energy regeneration structure of a hybrid electric vehicle (HEV) [10], most boom HRPES employ oil-electric hybrid technology [11].This type of HRPES usually adopts a parallel hybrid
An new energy recovery system that combines the advantages of an electric and hydraulic accumulator is proposed. The control strategy and the parameter matching for the MERS and the AERS are studied. It is possible to increase the efficiency of the generator and downsize the generator with the hydraulic accumulator in the AMGERS. The AMGERS
Hydraulic regeneration systems have been considered by the automotive industry for implementation in hybrid vehicles for a number of years. The combination of an internal combustion engine and an energy storage device has great potential for improving vehicle performance and fuel economy as well as reducing brake wear.
Based on the simulation and experimental results, the two-boost method results in more energy regeneration, and therefore, an increase in the energy regeneration efficiency as compared to a single-boost method. In the
Energy regeneration of APS in high-rise buildings is addressed in this paper. 2-A joint structural control/energy regeneration scheme is proposed and implemented in a benchmark model subjected to wind loads. The System includes an EMS, an active structural controller, and energy regeneration subsystems. 3-
Abstract: Though the traditional energy regeneration system(ERS) which used a hydraulic motor and a generator in hybrid excavators can regenerate part of the energy, the power of the motor and the
Potential energy regeneration is an important hydraulic energy-saving technology in construction machinery. However, the existing hydraulic regenerative potential energy system (HRPES) is still limited by its large size, high cost, circuit interference, and so on. To solve the above problems, this paper intends to study novel HRPES by optimizing the
system is that the energy regeneration system (ERS) becomes efficient. However, the overflow loss through the relief valve due to the frequent start-stop function and rotary, such as the swing of a hydraulic excavator, still exists and consumes a large amount of energy [13]. Furthermore, there are few studies examining this loss.
This secures Gibraltar’s energy supply economically, environmentally and sustainably. The associated closure of the three old plants represents the largest measure taken to improve air quality and reduce greenhouse gas emissions. The new power plant consists of six engines; 3 of which run on natural gas and 3 of which are dual fuel.
In May, 2016, EWP and the Government of Gibraltar held an official opening ceremony of the newly constructed wave energy power station on the east side of Gibraltar. Now, at a former World War II Ammunition Jetty, sits the initial 100KW of a 5MW power station.
The people and businesses of Gibraltar will have better air quality, a quieter environment, and see the rewards of better energy efficiency. Michael Caetano, Chief Operational Officer of the Gibraltar Electricity Authority (GEA) When Gibraltar upgraded its nearly 40-year-old power system, they opted for a unique LNG solution.
There are currently three installations in Gibraltar producing energy. Two of these installations namely Waterport and OESCO power stations supply electricity to the civil population,...
Until recently, Gibraltar’s electricity supply was dependent on some 40 diesel‑powered engines and turbines distributed across Gibraltar. In 2019 a new, modern power station situated at the North Mole commenced operation running long term on liquid natural gas (LNG).
At present, Gibraltar is very dependent on the importation of fossil fuels for energy production and in order to reach the 2020 targets, strategies and measures based on sustainability, improved efficiency and security need to be implemented. Guidance documents are also available to aid in the implementation of Articles within the EED.
