scholarly journals Feature Focus: Offshore Innovations: Teaching Rover New Tricks

2002 ◽  
Vol 124 (05) ◽  
pp. 47-51
Author(s):  
Michael Valenti
Keyword(s):  
Energy Efficiency ◽  
Optical Fiber ◽  
Electric Vehicles ◽  
Telemetry System ◽  
Electric Motors ◽  
Remotely Operated Vehicles ◽  
Net Communication ◽  
Surveying And Mapping

This article highlights that manufacturers have been designing remotely operated vehicles (ROVs) that are directly powered by electric motors to improve their energy efficiency, and to reduce their weight and size. Alstom Schilling Robotics developed the Quest to compete with 100- to 150-hp hydraulic ROVs in such underwater tasks as offshore construction support, remote tool deployment, object recovery, salvage, surveying, and mapping. The Quest’s Sea Net communication and telemetry system carries signals over a single optical fiber to and from modular hubs affixed to the ROV, TMS, and accessories, including sensors, cameras, lights, thrusters, and tools. The greater mass of hydraulic-powered ROVs gives them an advantage over electric vehicles in rough seas, where greater stability is needed. To operate in looser soil that cannot support the trencher, the tracks can be removed and replaced with skids, so that the trencher’s power can be directed to its thrusters.

Monitoring the energy efficiency of buildings with Raman DTS and embedded optical fiber cables

2014 ◽  
Author(s):  
P. Ferdinand ◽  
M. Giuseffi ◽  
N. Roussel ◽  
S. Rougeault ◽  
O. Fléchon ◽  
...  
Keyword(s):  
Energy Efficiency ◽  
Optical Fiber

scholarly journals Eco-Driving for Different Electric Powertrain Topologies Considering Motor Efficiency

2021 ◽  
Vol 12 (1) ◽  
pp. 6
Author(s):  
Alexander Koch ◽  
Tim Bürchner ◽  
Thomas Herrmann ◽  
Markus Lienkamp
Keyword(s):  
Dynamic Programming ◽  
Electric Vehicles ◽  
Quadratic Functions ◽  
Simultaneous Optimization ◽  
Speed Profile ◽  
Power Demand ◽  
Electric Motors ◽  
Car Following ◽  
Motor Efficiency ◽  
Computationally Expensive

Electrification and automatization may change the environmental impact of vehicles. Current eco-driving approaches for electric vehicles fit the electric power of the motor by quadratic functions and are limited to powertrains with one motor and single-speed transmission or use computationally expensive algorithms. This paper proposes an online nonlinear algorithm, which handles the non-convex power demand of electric motors. Therefore, this algorithm allows the simultaneous optimization of speed profile and powertrain operation for electric vehicles with multiple motors and multiple gears. We compare different powertrain topologies in a free-flow scenario and a car-following scenario. Dynamic Programming validates the proposed algorithm. Optimal speed profiles alter for different powertrain topologies. Powertrains with multiple gears and motors require less energy during eco-driving. Furthermore, the powertrain-dependent correlations between jerk restriction and energy consumption are shown.

scholarly journals Towards DC Energy Efficient Homes

2021 ◽  
Vol 11 (13) ◽  
pp. 6005
Author(s):  
Daniel Villanueva ◽  
Moisés Cordeiro-Costas ◽  
Andrés E. Feijóo-Lorenzo ◽  
Antonio Fernández-Otero ◽  
Edelmiro Miguez-García
Keyword(s):  
Energy Efficiency ◽  
Electric Vehicles ◽  
Energy Efficient ◽  
Electricity Consumption ◽  
Real Data ◽  
Mean Values ◽  
Led Lighting ◽  
Shed Light

The aim of this paper is to shed light on the question regarding whether the integration of an electric battery as a part of a domestic installation may increase its energy efficiency in comparison with a conventional case. When a battery is included in such an installation, two types of electrical conversion must be considered, i.e., AC/DC and DC/AC, and hence the corresponding losses due to these converters must not be forgotten when performing the analysis. The efficiency of the whole system can be increased if one of the mentioned converters is avoided or simply when its dimensioning is reduced. Possible ways to achieve this goal can be: to use electric vehicles as DC suppliers, the use of as many DC home devices as possible, and LED lighting or charging devices based on renewables. With all this in mind, several scenarios are proposed here in order to have a look at all possibilities concerning AC and DC powering. With the aim of checking these scenarios using real data, a case study is analyzed by operating with electricity consumption mean values.

scholarly journals A review of Energy Efficiency Measures Within Electric Motors Systems

2019 ◽  
Vol 158 ◽  
pp. 3346-3351 ◽  
Author(s):  
Andrea Trianni ◽  
Enrico Cagno ◽  
Davide Accordini
Keyword(s):  
Energy Efficiency ◽  
Electric Motors ◽  
Energy Efficiency Measures ◽  
Efficiency Measures

scholarly journals Energy efficiency trade-offs in small to large electric vehicles

2020 ◽  
Vol 32 (1) ◽  
Author(s):  
Martin Weiss ◽  
Kira Christina Cloos ◽  
Eckard Helmers
Keyword(s):  
Energy Efficiency ◽  
Electric Vehicles ◽  
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