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Energies, Volume 10, Issue 5

May 2017 - 153 articles

Cover Story: Energy-optimal kinematic redundancy resolution is required for future robotic closed-loop controlled applications of heavy-duty hydraulic manipulators. Kinematic redundancy of typical four-degrees-of-freedom hydraulic manipulators was thus effectively resolved as an optimal control problem with respect to minimum energy consumption of the widely popular constant-pressure (CP) and load-sensing (LS) hydraulic systems. The performance of the proposed energy-optimal redundancy resolution was compared with other redundancy resolutions along three Cartesian paths by measuring the hydraulic energy consumption of a forestry manipulator along these paths. With the significantly reduced energy consumption of the forestry manipulator using joint motions of the proposed redundancy resolution compared with those of conventional redundancy resolutions, the energy-inefficiency problem of valve-controlled hydraulic systems was addressed. View this paper

Articles (153)

  • Article
  • Open Access
6 Citations
5,854 Views
18 Pages

21 May 2017

This paper presents a novel switching frequency optimized space vector pulse width modulation (SVPWM) scheme for cascaded multilevel inverters. The proposed SVPWM is developed in a α′β′ coordinate system, in which the voltage vectors have only intege...

  • Article
  • Open Access
11 Citations
6,073 Views
22 Pages

Anomaly Detection in Gas Turbine Fuel Systems Using a Sequential Symbolic Method

  • Fei Li,
  • Hongzhi Wang,
  • Guowen Zhou,
  • Daren Yu,
  • Jiangzhong Li and
  • Hong Gao

20 May 2017

Anomaly detection plays a significant role in helping gas turbines run reliably and economically. Considering the collective anomalous data and both sensitivity and robustness of the anomaly detection model, a sequential symbolic anomaly detection me...

  • Article
  • Open Access
10 Citations
6,249 Views
18 Pages

Simulation Modeling Method and Experimental Investigation on the Uniflow Scavenging System of an Opposed-Piston Folded-Cranktrain Diesel Engine

  • Fukang Ma,
  • Zhenfeng Zhao,
  • Yangang Zhang,
  • Jun Wang,
  • Yaonan Feng,
  • Tiexiong Su,
  • Yi Zhang and
  • Yuhang Liu

20 May 2017

The scavenging process for opposed-piston folded-cranktrain (OPFC) diesel engines can be described by the time evolution of the in-cylinder and exhaust chamber residual gas rates. The relation curve of in-cylinder and exhaust chamber residual gas rat...

  • Article
  • Open Access
10 Citations
7,183 Views
18 Pages

Modeling and Optimization of a CoolingTower-Assisted Heat Pump System

  • Xiaoqing Wei,
  • Nianping Li,
  • Jinqing Peng,
  • Jianlin Cheng,
  • Jinhua Hu and
  • Meng Wang

20 May 2017

To minimize the total energy consumption of a cooling tower-assisted heat pump (CTAHP) system in cooling mode, a model-based control strategy with hybrid optimization algorithm for the system is presented in this paper. An existing experimental devic...

  • Article
  • Open Access
8 Citations
5,345 Views
13 Pages

20 May 2017

Climate change caused by global warming has become a serious issue in recent years. The main purpose of this study was to evaluate the effectiveness of the above system to quantitatively supply CO2 or CO2 hydrate from industrial to agricultural areas...

  • Article
  • Open Access
15 Citations
7,501 Views
19 Pages

20 May 2017

Inter-turn short circuit of field windings (ISCFW) may cause the field current of a generator to increase, output reactive power to decrease, and unit vibration to intensify, seriously affecting its safe and stable operation. Full integration of mech...

  • Article
  • Open Access
15 Citations
5,116 Views
13 Pages

20 May 2017

In order to effectively recover the residual coal resources, such as coal pillars and irregular coal blocks induced by large-scale extensive mining, in this study, we proposed a shortwall block mining (SBM) technology and examined the development pat...

  • Review
  • Open Access
27 Citations
10,356 Views
29 Pages

A Critical Review on Processes and Energy Profile of the Australian Meat Processing Industry

  • Ihsan Hamawand,
  • Anas Ghadouani,
  • Jochen Bundschuh,
  • Sara Hamawand,
  • Raed A. Al Juboori,
  • Sayan Chakrabarty and
  • Talal Yusaf

20 May 2017

This review article addresses wastewater treatment methods in the red meat processing industry. The focus is on conventional chemicals currently in use for abattoir wastewater treatment and energy related aspects. In addition, this article discusses...

  • Article
  • Open Access
31 Citations
7,960 Views
15 Pages

20 May 2017

This research aims to improve the operational efficiency and security of electric power systems at high renewable penetration by exploiting the envisioned controllability or flexibility of electric vehicles (EVs); EVs interact with the grid through g...

  • Article
  • Open Access
5 Citations
6,574 Views
17 Pages

A New Methodology for Building-Up a Robust Model for Heliostat Field Flux Characterization

  • Nicolás C. Cruz,
  • José D. Álvarez,
  • Juana L. Redondo,
  • Jesús Fernández-Reche,
  • Manuel Berenguel,
  • Rafael Monterreal and
  • Pilar M. Ortigosa

20 May 2017

The heliostat field of solar central receiver systems (SCRS) is formed by hundreds, even thousands, of working heliostats. Their adequate configuration and control define a currently active research line. For instance, automatic aiming methodologies...

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Energies - ISSN 1996-1073