Power Factor Articles

  • DOB: De-power LED lighting

    Everyone knows that driving power is the core of LED lighting. LED lighting lamps are known as energy-saving, intelligent and long service life. But these basically rely on good driving power. There has been a joke in the industry: If 100 LED lamps broke, 99 ascribe to the driving power supply. As the "heart" of LED lighting, its quality directly affects the quality of LED lighting. LED driver ...

  • Renewable Energy Systems - Case Study

    Overview Generating renewable electricity is an important way to reduce carbon dioxide (CO2) emissions and many countries are installing wind and solar power plants to help meet targets for cutting CO2. One drawback of these energy sources is their ...


    By Fuel Cell Today

  • Micro Combined Heat and Power Market to hit $13bn by 2024

    The Micro CHP Market is set to grow from its current market value of more than $2 billion to over $13 billion by 2024; as reported in the latest study by Global Market Insights, Inc. Positive outlook toward changing climatic conditions, energy security along with government regulations to curb GHG emission will ...


    By Global Market Insights, Inc.

  • Spin Doctors: How GE’s Service-Savvy Approach Squeezes the best from a fleet of 900 Wind Turbines

    Over 150 years ago, a budding English economist named William Stanley Jevons warned that a policy of energy efficiency might not be sufficient to conserve Britain’s dwindling coal reserves. His argument, now known as the Jevons paradox, was simple: Squeeze more energy from less coal, and people will just want more coal. ...


    By GE Renewable Energy

  • Annular Motor Design - Oil and Gas - Case Study

    Problem: An oil field application required a rotary motor for downhole actuation of a proprietary device.Requirements included a design with a large open bore through the center and use of a rechargeable battery pack that would be recharged through periodic inductive charging from the surface. Results: Using in-house proprietary motor topology, PCDworks created and modeled a number of candidate ...


    By Product Concept Development

  • Modified Sine Wave Inverters vs Pure Sine Wave Inverters

    Most everyday appliances and commercial tools run on AC power. This is fine if you’re connecting the device to a wall outlet that provides AC power. But what if you want to use power from a DC source, like a solar-powered generator or a car battery? In such cases, individuals need to use an inverter – a device that converts DC power to AC power. There are several types of ...


    By Larson Electronics LLC

  • Does Wind Turbine Blade Length Really Matter?

    Simply put: Longer wind turbine blade length means greater power production. Blades capture the wind which forces the rotation of the rotor; longer blades means more area for the wind to push against, which means greater force and rotational power. However, how much difference does blade length make overall, in comparison to other factors? There is a standard formula that can be used to apply the ...

  • Universal Input LED Lamps – How do they work?

    In commercial lighting applications with HiD or older 2 pin fluorescent lamps, a magnetic ballast is used to control the energy in the arc lamp. In the first generation of LED replacement lamps, two kinds were available: LED lamps that only worked with the ballast – such as Lunera’s Gen1 & Gen2 Susan families – known by DLC as a “type-A” lamp; LED Lamps ...


    By Lunera, Inc.

  • No Place Is Too Far

    The remote location of hydropower stations is often a great challenge when major repair work is necessary. The refurbishment of a large generator in the Scottish Highlands shows how Sulzer finds cost-effective service solutions even in places miles from nowhere. Much of the UK hydroelectric capacity was built during the 1950s. These installations have performed extremely well, especially ...


    By Sulzer Ltd.

  • Step by Step CHP: the Pitfalls to Avoid Between Planning and Design

    There are many pitfalls in between planning and designing a cogeneration project. Find out how to avoid them. Cogeneration can save money, conserve energy, and reduce emissions - but specifying the right combined heat and power (CHP) unit for ...


    By Centrica Business Solutions

  • Global CSP capacity forecast to hit 22 GW by 2025

    New CSP capacity is expected to dip in 2016 and bounce back in 2017 to resume steady growth over the next decade as national energy policies stabilise market conditions, according to the newly released CSP Today Markets Forecast Report: 2015-2025. The CSP industry has come a long way over the last 10 years, demonstrating the technology’s use for a wide range of applications and ...


    By New Energy Update

  • Context–independent centrality measures underestimate the vulnerability of power grids

    Power grids vulnerability is a key issue in society. A component failure may trigger cascades of failures across the grid and lead to a large blackout. Within complex network analysis, structural vulnerabilities of power grids have been studied mostly using purely topological approaches, which assumes that flow of power is dictated by shortest paths. However, this fails to capture the real flow ...


    By Inderscience Publishers

  • A perspective overview of topological approaches for vulnerability analysis of power transmission grids

    Vulnerability analysis is a key issue in power systems since power transmission grids play a crucial role as a critical infrastructure. The power grid structure (number of nodes and lines, their connections, and their physical properties and operational constraints) is one of the main factors to assure power system security. Complex network theory as a promising topological approach for the ...


    By Inderscience Publishers

  • Exergy analysis of a thermoelectric power generator: influence of bi–tapered pin geometry on device characteristics

    The thermal characteristics of bi–tapered thermoelectric generator are investigated. The influence of the dimensionless shape parameter, associated with the device pin geometric configuration, on the first– and second–law efficiencies and device output power is examined. The study is extended to include the effects of the external load parameter and the device operating temperature ratio on the ...


    By Inderscience Publishers

  • A high power factor and low crest factor Cuk converter for lighting systems

    This paper deals with the analysis, design and simulation of power factor corrected (PFC), low crest factor (CF) electronic ballast for a compact fluorescent lamp (CFL). The proposed electronic ballast employs a Cuk buck-boost AC-DC converter as a power factor regulator (PFR) operating in discontinuous conduction mode (DCM). In the proposed electronic ballast, a half bridge series resonant ...


    By Inderscience Publishers

  • How some climate “wins” can lead to other uphill battles in the clean energy fight

    Proponents should consider all possible reactions in order to create a smoother path forward for clean energy. As the adage goes, following every action is a reaction. As elsewhere, this is true in politics, where every move is followed by a series of countermeasures. Lately, climate and energy have increasingly been at the political fore. It follows then, that climate policy ...


    By Ensia

  • Cooperation with micca - Case Study

    The Customer Seated in Vienna, Austria, the micca informationstechnologie gmbh is an expert for industrial metrology. micca is focusing on the fields of energy supply with a strong emphasis on metrology for electrical substations and high-voltage power lines. micca cooperates with a network of partners and in the technology field also has a close cooperation with the Austrian ...

  • Oil refinery vapour gas case study

    1.0 Evaluation of Refinery Gases Various refinery gases are generated in the process of oil refining. These vary, depending upon the type of crude oil being distilled, such as Reduced Crude distillation, or Naphtha cracker. For the purposes of this case study the description and range of refinery gases are those gases produced from refining Crude Oil and Reduced Crude only. Crude ...

  • Mirrors in Space for Low-Cost Terrestrial Solar Electric Power at Night

    ABSTRACT — A constellation of 18 mirror satellites is proposed in a polar sun synchronous dawn to dusk orbit at an altitude of approximately 1000 km above the earth. Each mirror satellite contains a multitude of 2 axis tracking mirror segments that collectively direct a sun beam down at a target solar electric field site delivering a solar intensity to that terrestrial site equivalent to ...


    By JX Crystals

  • Economic Potential for Thermophotovoltaic Electric Power Generation in the Steel Industry

    ABSTRACT - A steel mill extrudes steel billets at temperatures above 1400 °C continuously 24 hours a day. The steel billets then go to cooling beds where they slowly cool down to below 1100 °C. JX Crystals Inc makes Gallium Antimonide (GaSb) thermophotoyoltaic (TPV) cells that can generate over 1 W/cm when exposed to infrared radiant energy from glowing steel at temperatures above 1100 ...


    By JX Crystals

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