Energieeffizienz durch Oberschwingungsreduzierung*/Energy efficiency through harmonic distortion reduction – Harmonics-minimized control strategy in production machines

2019 ◽  
Vol 109 (10) ◽  
pp. 793-800
Author(s):  
S. Ju ◽  
N. Hanenkamp
Keyword(s):  
Energy Efficiency ◽  
Energy Consumption ◽  
Power Electronics ◽  
Control Strategy ◽  
Harmonic Distortion ◽  
Wird Eine ◽  
Motor Speed ◽  
Increase Energy Efficiency ◽  
Fundamental Oscillation ◽  
Distortion Reduction

Oberschwingungen durch frequenzgeregelte Antriebe wirken sich stark negativ auf den Energieverbrauch aus. Diese Oberschwingungen verstärken sich immer dann, wenn schnelle Drehzahländerungen aus Produktivitätsgründen notwendig sind. Zur Kompensation dieser Effekte müssen Steuerungsstrategien optimiert und weiterentwickelt werden. Durch die Erhöhung des Grundschwingungsanteils im Motorsteuersignal lässt sich die Energieeffizienz um bis zu 20 % steigern. Um dieses Ziel zu erreichen, wird eine Bibliothek standardisierter Steuerungsbausteine entwickelt.   The effect of harmonic distortions triggered by frequency-controlled power electronics on energy consumption is non-negligible. These distortions increase when productivity-related accelerations and decelerations occur. A new control strategy has been developed. By increasing the fundamental oscillation ratio in the motor speed changing process, it is possible to increase energy efficiency by up to 20 %. A library model has been developed.

Study and Simulation on the Energy Efficiency Management Control Strategy of Ship Based on Clean Propulsion System

2015 ◽  
Author(s):  
Kai Wang ◽  
Xinping Yan ◽  
Yupeng Yuan
Keyword(s):  
Energy Efficiency ◽  
Energy Consumption ◽  
Control Strategy ◽  
Control Strategies ◽  
Management Control ◽  
Propulsion System ◽  
Power Requirement ◽  
Doubly Fed ◽  
System Configurations ◽  
And Control

Nowadays, with the higher voice of ship energy saving and emission reduction, the research on energy efficiency management is particularly necessary. Energy efficiency management and control of ships is an effective way to improve the ship energy efficiency. In this paper, according to the new clean propulsion system configurations of 5000 tons of bulk carrier, the energy efficiency management control strategy of the clean propulsion system is designed based on the model of advanced brushless doubly-fed shaft generator, propulsion system using LNG/diesel dual fuel engine and energy consumption of the main engine for reducing energy consumption. The simulation model of the entire propulsion system and the designed control strategy were designed. The influence of the engine speed on the ship energy efficiency was analyzed, and the feasibility of the energy efficiency management control strategies was verified by simulation using Matlab/Simulink. The results show that the designed strategies can ensure the power requirement of the whole ship under different conditions and improve the ship energy efficiency and reduce CO2 emissions.

scholarly journals Real-Time Decision Making in First Mile and Last Mile Logistics: How Smart Scheduling Affects Energy Efficiency of Hyperconnected Supply Chain Solutions

Energies ◽  
2018 ◽  
Vol 11 (7) ◽  
pp. 1833 ◽  
Author(s):  
Tamás Bányai
Keyword(s):  
Energy Efficiency ◽  
Supply Chain ◽  
Energy Consumption ◽  
Real Time ◽  
Real Time Scheduling ◽  
Improve Energy Efficiency ◽  
Increase Energy Efficiency ◽  
Last Mile ◽  
Time Scheduling ◽  
Last Mile Delivery

Energy efficiency and environmental issues have been largely neglected in logistics. In a traditional supply chain, the objective of improving energy efficiency is targeted at the level of single parts of the value making chain. Industry 4.0 technologies make it possible to build hyperconnected logistic solutions, where the objective of decreasing energy consumption and economic footprint is targeted at the global level. The problems of energy efficiency are especially relevant in first mile and last mile delivery logistics, where deliveries are composed of individual orders and each order must be picked up and delivered at different locations. Within the frame of this paper, the author describes a real-time scheduling optimization model focusing on energy efficiency of the operation. After a systematic literature review, this paper introduces a mathematical model of last mile delivery problems including scheduling and assignment problems. The objective of the model is to determine the optimal assignment and scheduling for each order so as to minimize energy consumption, which allows to improve energy efficiency. Next, a black hole optimization-based heuristic is described, whose performance is validated with different benchmark functions. The scenario analysis validates the model and evaluates its performance to increase energy efficiency in last mile logistics.

Influence of Volumetric Capacity on Energy Consumption in Oil-Lubricated Compressed Air Systems

2016 ◽  
Vol 8 (4) ◽  
Author(s):  
Pawel Olszewski ◽  
Claus Borgnakke
Keyword(s):  
Mathematical Model ◽  
Energy Efficiency ◽  
Energy Consumption ◽  
Potential Energy ◽  
Uncertainty Analysis ◽  
Control Strategy ◽  
Energy Savings ◽  
Compressed Air ◽  
Numerical Code ◽  
Volumetric Capacity

The aim of this research is to estimate the influence of compressed air volumetric capacity on the energy consumption in systems equipped with oil-lubricated screw compressors. A mathematical model of oil-lubricated screw compressors has been proposed. The model is verified by comparing with real measurements, and overall uncertainty analysis is estimated. An in-house developed numerical code (c++) is used to calculate the energy consumption in 252,000 combinations. The final result can be used to estimate the energy efficiency of existing air systems and to assess potential energy savings due to changes in the operation of the system and its control strategy.

Rail Transportation Energy Efficiency-Oriented Technologies

2012 ◽  
Author(s):  
Pamela E. Alexander
Keyword(s):  
Energy Efficiency ◽  
Energy Consumption ◽  
Power Systems ◽  
New Technologies ◽  
Rail Transportation ◽  
Transportation Energy ◽  
Increase Energy Efficiency ◽  
Rail Systems ◽  
Sustainability Initiatives ◽  
Carbon Dioxide Co2

Rail transportation is playing a very important role in the effort to keep the world’s expanding major cities safe and mobile. Travel by rail can move people and cargo with higher levels of energy efficiency, greater safety, lower cost and greater reliability than any other mode of transportation. On average, trips by train can generate between one third and one fifth of the carbon dioxide (CO2) produced by the equivalent automobile or airplane travel. Environmental awareness plus reduced operating costs are primary considerations in decision making for new transit programs around the globe. Energy consumption is a major part of rail operation costs and has been at the focus of rail systems sustainability initiatives. The majority of energy consumed by metropolitan and urban rail systems is used to move the trains. In recent years, energy saving technologies for rail vehicle power systems have been implemented on many rail systems worldwide. Improving railway energy efficiency results in not only a reduction in energy consumption and cost, but also a reduction in pollution due to power generation. In an effort to promote environmental quality and energy efficiency, energy usage in rail systems is analyzed to identify new technologies, developments, and procedures for increased efficiency. This paper provides an overview of the various strategies and solutions used to increase energy efficiency in rail systems and highlights the key technologies needed for their implementation.

scholarly journals Current and Voltage Imbalances at BPTIK Universitas PGRI Semarang

2021 ◽  
Vol 3 (1) ◽  
pp. 0210104
Author(s):  
Margono Margono ◽  
Irna Farikhah
Keyword(s):  
Energy Efficiency ◽  
Energy Consumption ◽  
Energy Conservation ◽  
Neutral Current ◽  
Energy Audit ◽  
Current Development ◽  
Electrical Parameters ◽  
Increase Energy Efficiency ◽  
Current Voltage ◽  
Unbalanced Voltage

Energy conservation is an effort to increase energy efficiency. This research conducted an energy audit in the BPTIK (Badan Pengembangan Teknologi Informasi dan Komunikasi) department room at the Universitas PGRI Semarang, observing the value of electrical parameters, especially unbalanced voltage and current that have the potential to cause neutral currents. In this study the calculated unbalanced voltage value is 0.64% and unbalanced current is 20.25%. From the current development, the neutral current produces an average of 1.72 Amperes. From the value of the neutral current can be calculated the energy lost in the conductor neutral wire per day is about 0.01% of energy consumption by the load per day.Keywords: current, voltage, imbalance

EnergIT

2013 ◽  
Vol 4 (1) ◽  
pp. 83-111 ◽  
Author(s):  
Eugenio Capra ◽  
Paolo Cremonesi ◽  
Chiara Francalanci ◽  
Francesco Merlo ◽  
Nicola Parolini
Keyword(s):  
Energy Efficiency ◽  
Energy Consumption ◽  
Data Centers ◽  
Cooling System ◽  
Increase Energy Efficiency ◽  
Incremental Approach ◽  
Flow Circulation ◽  
System 2 ◽  
Reduction Of Energy Consumption

Researches on green data centers have defined guidelines and end-to-end methodologies to increase energy efficiency. Most of these approaches require a disrupting reengineering of the infrastructure and significant upfront investments. Smaller data centers need to reach green objectives with a more incremental approach. The EnergIT project proposes a methodology and related tools that support the incremental redesign of data centers toward greater energy efficiency based on three main levers: 1) physical repositioning of servers to optimize air flow circulation and cooling, enabling higher set temperatures of the cooling system; 2) replacement of server models; and 3) virtualization. This paper describes the approach and provides evidence on the effectiveness of the methodology by showing how the combined effect of the three levers has led to 62% reduction of energy consumption in a real case study.

A Voronoi- Ant Colony based Routing (VoR-Ant-R) Algorithm for WMSNs

2022 ◽  
Vol 13 (2) ◽  
pp. 0-0
Keyword(s):  
Energy Efficiency ◽  
Energy Consumption ◽  
Ant Colony ◽  
Delivery Ratio ◽  
Wireless Multimedia ◽  
Energy Hole ◽  
Packet Delivery ◽  
Multimedia Sensor Networks ◽  
Increase Energy Efficiency ◽  
Simulation Results

Wireless Multimedia Sensor Networks (WMSNs) have been used in many applications and powerful distributed systems. But the performance of WMSNs is suffering from the occurrence of energy holes. To improve the performance of the network and packet delivery ratio, a Voronoi-Ant colony based Routing (VoR-Ant-R) algorithm is proposed for WMSNs to discover the energy holes and finds the shortest path from the source to destination in the WMSNs even though faces some obstacles. The WMSNs are constructed using the Voronoi structure to bypass energy holes. After bypassing the energy hole in the path; an ACO is introduced to select a neighborhood node for data forwarding. This ACO constructs the shortest optimized path to enhance the performance of the WMSNs. The proposed work is experimentally compared with other algorithms such as IEEABR, EEABR, SC, and BEES. The simulation results show that VoR-Ant-R can increase energy efficiency, success rate, reduces energy consumption, and latency.

Energy efficiency in the design of buildings

2007 ◽  
Author(s):  
Gerhard Dell ◽  
Christiane Egger
Keyword(s):  
Energy Efficiency ◽  
Energy Consumption ◽  
Energy Demand ◽  
Building Design ◽  
Space Heating ◽  
Design Strategies ◽  
External Energy ◽  
Increase Energy Efficiency ◽  
Energy Technologies ◽  
Private Households

The buildings sector accounts for 40% of European energy requirements. Two thirds of the energy used in European buildings is consumed by private households, and their consumption is growing every year as rising living standards lead to an increased use of air conditioning and heating systems. Research shows that more than one-fifth of the present energy consumption and up to 30–45 million tonnes of CO2 per year could be saved by 2010 by applying more ambitious standards both to new and refurbished buildings–these savings would represent a considerable contribution to meeting the European Kyoto targets (European Council, 2002). Without comprehensive measures, energy consumption and CO2 emissions from the building sector will continue to grow. Sustainable energy strategies for buildings will therefore increase in importance. Even today, so-called ‘zero emission buildings’ can be realized with existing planning approaches and technologies. Such buildings do not need an external energy input (for example from oil, gas or supplied electricity) other than solar energy. This is achieved by a combination of a high-level of energy efficiency and renewable energy technologies. This chapter focuses on buildings in the housing and service sectors, presents new building design strategies, technologies, and building components as well as the new legal framework set by the European Buildings Directive. It also discusses the question of raising awareness, and presents some thoughts on how changing life patterns may impact the buildings of the future. Residential buildings mainly need energy for space heating; with present building standards, space heating represents about 70% of the overall energy demand of existing buildings. In many European countries there are substantial efforts to increase energy efficiency—nevertheless, not all the potential for energy savings has been realized by far, and oil is still a major energy source for heating. In recent years, heat demand for new buildings was reduced significantly by technical measures. However, the number of low energy or passive buildings in Europe is still very limited, despite the fact that they can be constructed at acceptable costs.

Solar Powered Automatic Controlled Advertising Light Box System

2011 ◽  
Vol 148-149 ◽  
pp. 101-105
Author(s):  
Qing Yuan Zhu ◽  
Cheng Lu Wen ◽  
Wen Yi Xie ◽  
Jun Jun Ye ◽  
Hui Yin
Keyword(s):  
Energy Efficiency ◽  
Energy Consumption ◽  
Control Strategy ◽  
Tracking System ◽  
Hierarchical Control ◽  
Weather Condition ◽  
High Energy ◽  
Rotation System ◽  
Cable Laying ◽  
Solar Powered

This paper introduces a solar powered automatic controlled advertising light box system functioning box rotation and poster cycling displaying of each panel, which overcomes the disadvantages of ordinary advertising light boxes of humdrum displaying and high energy consumption. The system includes three parts which are box rotation system, poster scrolling system and single-axis sun tracking system which can improve the solar energy efficiency and reduce energy consumption. Sun tracking system which effectively combined the sun angle tracking and photoelectric tracking method can automatically switch between the work mode and hibernate mode according to time and weather condition so as to maximize energy efficiency. A hierarchical control strategy which contained main control system and sun tracking system is adopted to control light box rotation, panel displaying and sun tracking at the same time. The solar advertising light box system was verified by tests that with the hierarchical control strategy the power generated by solar panel increased 38.2% than fixed panel. Experiment results show that the light box works stably and has potential to apply under the situations where cable laying is not convenient.

scholarly journals FEEdBACk: An ICT-Based Platform to Increase Energy Efficiency through Buildings’ Consumer Engagement

Energies ◽  
2021 ◽  
Vol 14 (6) ◽  
pp. 1524 ◽  
Author(s):  
Filipe Soares ◽  
André Madureira ◽  
Andreu Pagès ◽  
António Barbosa ◽  
António Coelho ◽  
...  
Keyword(s):  
Energy Efficiency ◽  
Energy Consumption ◽  
Energy Savings ◽  
Peak Load ◽  
Quality Parameters ◽  
Information And Communications Technology ◽  
Renewable Energy Consumption ◽  
Horizon 2020 ◽  
Increase Energy Efficiency ◽  
Flexible Devices

Energy efficiency in buildings can be enhanced by several actions: encouraging users to comprehend and then adopt more energy-efficient behaviors; aiding building managers in maximizing energy savings; and using automation to optimize energy consumption, generation, and storage of controllable and flexible devices without compromising comfort levels and indoor air-quality parameters. This paper proposes an integrated Information and communications technology (ICT) based platform addressing all these factors. The gamification platform is embedded in the ICT platform along with an interactive energy management system, which aids interested stakeholders in optimizing “when and at which rate” energy should be buffered and consumed, with several advantages, such as reducing peak load, maximizing local renewable energy consumption, and delivering more efficient use of the resources available in individual buildings or blocks of buildings. This system also interacts with an automation manager and a users’ behavior predictor application. The work was developed in the Horizon 2020 FEEdBACk (Fostering Energy Efficiency and BehAvioral Change through ICT) project.

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