scholarly journals A Novel Energy Recovery System for Parallel Hybrid Hydraulic Excavator

2014 ◽  
Vol 2014 ◽  
pp. 1-14 ◽  
Author(s):  
Wei Li ◽  
Baoyu Cao ◽  
Zhencai Zhu ◽  
Guoan Chen
Keyword(s):  
Mathematical Models ◽  
Energy Saving ◽  
Energy Recovery ◽  
Simulation Models ◽  
Hydraulic Excavator ◽  
Recovery Efficiency ◽  
Hydraulic Motor ◽  
Energy Recovery System ◽  
Recovery System ◽  
Main Components

Hydraulic excavator energy saving is important to relieve source shortage and protect environment. This paper mainly discusses the energy saving for the hybrid hydraulic excavator. By analyzing the excess energy of three hydraulic cylinders in the conventional hydraulic excavator, a new boom potential energy recovery system is proposed. The mathematical models of the main components including boom cylinder, hydraulic motor, and hydraulic accumulator are built. The natural frequency of the proposed energy recovery system is calculated based on the mathematical models. Meanwhile, the simulation models of the proposed system and a conventional energy recovery system are built by AMESim software. The results show that the proposed system is more effective than the conventional energy saving system. At last, the main components of the proposed energy recovery system including accumulator and hydraulic motor are analyzed for improving the energy recovery efficiency. The measures to improve the energy recovery efficiency of the proposed system are presented.

Modeling and Simulation of Boom Potential Energy Recovery System in Hybrid Hydraulic Excavator

2013 ◽  
Vol 437 ◽  
pp. 217-221 ◽  
Author(s):  
Bao Yu Cao ◽  
Wei Li ◽  
Zhe Tong
Keyword(s):  
Potential Energy ◽  
Modeling And Simulation ◽  
Energy Saving ◽  
Energy Recovery ◽  
High Energy ◽  
Excess Energy ◽  
Hydraulic Excavator ◽  
Energy Recovery System ◽  
Recovery System ◽  
Hydraulic Cylinders

Hydraulic excavator energy-saving is important to relieve source shortage and protect environment. This paper mainly discusses the energy saving for the hybrid hydraulic excavator. By analyzing the excess energy of three hydraulic cylinders in the conventional hydraulic excavator, a new boom potential energy recovery system is proposed. At last, the model of the proposed system has been built by AMESim. The simulation result shows that the proposed boom potential energy recovery system has a high energy saving efficiency.

Overview and Optimized Design for Energy Recovery Patents Applied to Hydraulic Systems

2019 ◽  
pp. 256-285
Author(s):  
Marwa Elhajj ◽  
Rafic Younes ◽  
Sebastien Charles
Keyword(s):  
Energy Saving ◽  
Energy Recovery ◽  
Optimization Technique ◽  
Hydraulic Systems ◽  
Energy Recovery System ◽  
Construction Machinery ◽  
Recovery System ◽  
Hydraulic Excavators ◽  
Complete Study ◽  
Low Efficiency

Due to their large application quantities with extremely low efficiency, pollutant emissions, high fuel consumption, and oil price, researches on the environment protection and the energy saving of construction machinery, especially hydraulic excavators, become very necessary and urgent. In this chapter, the authors proposed a complete study for the excavators' hydraulic energy recovery systems. This study is divided into two parts. In the first one, an overview for the energy saving principles is discussed and classed based on the type of the energy recovered. In the second part and once the energy recovery system is selected, the authors proposed a new approach to design the energy recovery system under a typical working cycle. This approach, the global optimization method for parameter identification (GOMPI), uses an optimization technique coupled with the simulated model on simulation software. Finally, results concluded that applying GOMPI model was an efficient solution as it proves its accuracy and efficiency to design any energy recovery patent applied to hydraulic systems.

An electro-mechanical braking energy recovery system based on coil springs for energy saving applications in electric vehicles

Energy ◽  
2020 ◽  
Vol 200 ◽  
pp. 117472 ◽  
Author(s):  
Lingfei Qi ◽  
Xiaoping Wu ◽  
Xiaohui Zeng ◽  
Yan Feng ◽  
Hongye Pan ◽  
...  
Keyword(s):  
Energy Saving ◽  
Electric Vehicles ◽  
Energy Recovery ◽  
Energy Recovery System ◽  
Recovery System ◽  
Braking Energy Recovery

Research on the Energy Recovery of the Excavator Slewing System Based on Hybrid Technology

2014 ◽  
Vol 986-987 ◽  
pp. 952-955 ◽  
Author(s):  
Dong Yun Wang ◽  
Yu Zhang
Keyword(s):  
Electric Motor ◽  
Energy Recovery ◽  
High Energy ◽  
Hydraulic Excavator ◽  
Recovery Efficiency ◽  
Hydraulic Motor ◽  
Recovery Method ◽  
Hybrid Technology ◽  
New Energy ◽  
Super Capacitors

In the traditional excavator, the slewing braking energy cannot be recovered and eventually became heat. As the hybrid technology was introduced into the hydraulic excavator, it makes energy recovery possible. In this article, a new energy recovery method based on hybrid, using an electric motor instead of a hydraulic motor to drive the swing mechanism. When braking, the electric motor will enter the generator mode and the energy will be recovered and stored in super-capacitors. This method has been proved to have high energy recovery efficiency.

Thermodynamic Analysis of Hydraulic Braking Energy Recovery Systems for a Vehicle

2015 ◽  
Vol 138 (1) ◽  
Author(s):  
Satyam Panchal ◽  
Ibrahim Dincer ◽  
Martin Agelin-Chaab
Keyword(s):  
Thermodynamic Analysis ◽  
Energy Recovery ◽  
Hydraulic Fluid ◽  
Hydraulic Motor ◽  
Hydraulic Pump ◽  
Energy Recovery System ◽  
Environment Temperature ◽  
Recovery System ◽  
Hydraulic Accumulator ◽  
Braking Energy Recovery

In this study, a thermodynamic analysis of a hydraulic braking energy recovery system used in vehicles is performed for newly developed systems. The present system is related to the field of energy efficiency in vehicles. The energy recovery system comprises a first pump, a hydraulic accumulator, and a hydraulic motor. The first pump is a variable displacement hydraulic pump (VDP). The hydraulic accumulator is connected to the first pump which operates to store hydraulic fluid under pressure. The hydraulic motor is hydraulically connected to the accumulator to receive hydraulic fluid. The motor is adapted to drive a second hydraulic pump, which is hydraulically connected to the auxiliary system, using hydraulic energy stored in the accumulator. The overall charging and discharging efficiencies, and the overall system efficiency is calculated and presented in this paper. For the purpose of the analysis, EES (engineering equation solver) is used. In addition, parametric studies are performed to observe the effects of different substantial parameters, namely, the inlet pressure and temperature of the accumulator, and the reference environment temperature, in order to investigate the variations in the system performance in terms of the efficiencies. Two systems are developed and it is found that the charging and discharging efficiencies for one system are 83.81% and 87.73%, while for the other system the charging and discharging efficiencies are 81.84% and 85.67%, respectively.

scholarly journals Design, Selection and Application of Energy Recovery Device in Seawater Desalination: A Review

Energies ◽  
2020 ◽  
Vol 13 (16) ◽  
pp. 4150
Author(s):  
Bin Huang ◽  
Kexin Pu ◽  
Peng Wu ◽  
Dazhuan Wu ◽  
Jianxing Leng
Keyword(s):  
Energy Consumption ◽  
Recovery Rate ◽  
Energy Recovery ◽  
Operating Conditions ◽  
Recovery Efficiency ◽  
Seawater Desalination ◽  
Energy Recovery System ◽  
Recovery System ◽  
Design Selection ◽  
Selection Of

In the seawater desalination system, the energy recovery system is a crucial part, as it consumes a lot of energy and plays a guiding role in the recovery efficiency. Therefore, in the energy recovery system, the recovery rate and energy consumption are the key factors to guide the system design. In order to make the energy recovery device achieve a high recovery rate under conditions of low energy consumption, the design and selection of each device in the system are particularly important. At the current stage, system matching optimization, device design optimization, and function objective optimization are widely used to improve the energy recovery system. In this paper, the design principle of the energy recovery integration system is analyzed, methods of reducing energy consumption and improving recovery efficiency are presented. The study provides guidance for the design and selection of energy recovery devices under different operating conditions.

A Small-Scale ORC Energy Recovery System for Vehicular Application: Feasibility Analysis and Preliminary Components Design

2013 ◽  
Author(s):  
Roberto Capata ◽  
Enrico Sciubba
Keyword(s):  
Energy Recovery ◽  
Small Scale ◽  
Thermal Source ◽  
Preliminary Design ◽  
Energy Recovery System ◽  
Compact Heat Exchangers ◽  
Main Challenge ◽  
Recovery System ◽  
Main Components ◽  
System Layout

The paper analyses the feasibility of an “on-board” innovative and patented (patent ID RM2011 A 000671) ORC recovery system. The vehicle thermal source can be either a typical diesel engine (1400 cc) or a small gas turbine set (15–30 kW). The sensible heat recovered from the exhaust gases feeds the energy recovery system that can produce sufficient extra power to sustain the conditioning system and other auxiliaries. The concept is suitable for all types of thermally propelled vehicles, but it is studied here for automotive applications. The characteristics of the organic cycle-based recovery system are discussed, and a preliminary design of the main components, such as condenser, evaporator and pre-heater is presented. The main challenge are the imposed size and weight limitations that require a particular design for this compact heat exchangers. A possible system layout is analysed and the requirements for a prototypal application are investigated. At this stage of the project, no components costs evaluation is provided, in part because our scope is to demonstrate feasibility, and secondly most of the components are built in our own shop.

scholarly journals Flywheel-Based Boom Energy Recovery System for Hydraulic Excavators with Load Sensing System

Actuators ◽  
2021 ◽  
Vol 10 (6) ◽  
pp. 126
Author(s):  
Jiansong Li ◽  
Yu Han ◽  
Shaohui Li
Keyword(s):  
Energy Efficiency ◽  
Potential Energy ◽  
Energy Saving ◽  
Energy Recovery ◽  
Mechanical Energy ◽  
Control Circuit ◽  
Energy Recovery System ◽  
Load Sensing ◽  
Sensing System ◽  
Recovery System

A hydraulic excavator (HE) is a typical piece of construction equipment and is widely used in various construction fields. However, the poor energy efficiency of HEs results in serious energy waste and has aroused the attention of researchers. Furthermore, rising fuel prices and increasing stringent waste gas emission legislation sparked demand for ways to improve energy efficiency. Recovering the otherwise wasted boom potential energy of a conventional HE by proper methods offers the potential to improve the fuel efficiency of HEs. In this paper, a mechanical energy recovery system consisting of a pump/motor and a flywheel is presented for HEs using a load sensing system. When the boom moves down, the boom potential energy is converted into mechanical energy by the boom cylinder and the pump/motor to accelerate the flywheel. When needed, the captured energy stored in the flywheel is converted back into a form of pressure energy to directly drive the boom cylinder up without throttling the main valve. In the lifting process, a compound circuit that consists of a throttling control circuit and a displacement control circuit is presented. A control strategy is proposed to optimize the energy recovery and reuse procedure. A 4-t HE is used as a study case to investigate the energy-saving potential of the proposed system. Numeric simulations show that the proposed system, when compared with a conventional load sensing system, can reduce as much as 48.9% energy consumption in a non-loaded cycle of boom lifting and lowering process. As to a fully loaded case, the energy-saving rate is 16.9%. This research indicates the flywheel-based scheme is promising for developing an energy-efficient fluid power system for HEs and reducing energy consumptions.

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