Disturbing vibrations and noise of electrical machines are gaining impact. Therefore, it is necessary to estimate the electromagnetic, structure-dynamical, and acoustic behavior of the machine during designing and before prototyping. An adequate tool is numerical simulation applying the Finite-Element Method (FEM) and the Boundary-Element Method (BEM) allowing for the structured analysis and evaluation of audible noise also caused by manufacturing tolerances.Read full article
Red metal in midst of a green countryside helps to sustain the nature. When a railway or tram line is newly built, it can be seen that trolley wires are actually made of copper, as can be seen here from a bird's perspective down the Stuttgart TV tower. Unfortunately the wires are blackened very soon after going into operation because the pantographs of locomotives have a contact piece made of carbon.Read full article
Is it presumptuous to take stock of this year's development (towards sustainability) only halfway through? Yes, it is, but anyway!
Something remarkable has happened this year: sustainability and climate change are on the agenda and will remain so, no matter what. No doubt the trigger (or the ratchet) was Sir Nicholas Stern's review and the way it framed the issues in both political and economic terms. A framework that also enabled businesses to see their role in the game, their threats and their opportunities.Read full article
Can long-term economic effects be accurately assessed?
On June 5th, representatives from CE Delft presented the Green4sure plan to the Dutch environment minister Jacqueline Cramer. CE Delft is an independent research and consultancy organisation. It has put together the plan at the request of a coalition of six major Dutch trade unions and environmental NGOs.
All emission allowances auctioned
Green4sure targets an emission reduction of 50% by 2030. The main concept is to extend the system of emission allowances. They will be attributed to individual companies (industry, electrical power generation, and aviation), or to a sector as a whole (built environment and transport sector). All allowances will be auctioned. Given the need for urgent action, the plan also includes a few temporary measures, for instance a cap of 375 gCO2/kWh for all new generating plants.Read full article
Energy policies that involve utilities (the old DSM-way) were never totally out, but are coming back strong. ACEEE has them highest on their list in a fresh study for Florida.Read full article
The Draft Regulatory Framework for Air Emissions
On April 27 Canada released a first draft version of its Regulatory Framework on Air Emissions. The framework confirms Canada’s departure from the Kyoto protocol. It establishes a Greenhouse Gas (GHG) emission reduction target of only 150 MT by 2020 (-19% compared to 2006), while Kyoto requires that Canada saves 220 MT by 2020 (-28% compared to 2006).Read full article
Making use of all the benefits of Distributed Generation (DG)
Distributed Generation (DG) technologies such as photovoltaic cells, wind-power, micro-turbines and fuel cells have the potential to significantly reduce emissions and ultimately perhaps the production cost as well. Connecting them to the distribution grid however is a subject of major concern.
One way of dealing with this could be to take a systems approach, viewing the generator and the associated loads as a subsystem or ‘microgrid’ that can be separated from the main grid. Such a microgrid would operate in parallel with the grid (when connected) or in island mode (when disconnected). It would disconnect from the grid during significant events (faults, voltage collapses), providing UPS services to its loads. If desired, it could also disconnect when the quality of power from the grid fell below certain standards.Read full article
The Europeans, to an overwelming majority (close to 90%), are concerned with climate issues and demand action now! This is the conclusion o f the latest Eurobaromoter. There are differences between the countries, but strangely enough not with a geographic pattern of the type we are used to (north vs south, east vs west or even new members vs old).Read full article
They are striving hard at IEC to tell the practicing electrician the substantial difference between a PE and a PEN conductor, but as long as the same coloured adhesive tape can be used to mark either of them, it doesn't matter at all, and the IEC people themselves can feel free use said tape for any other purpose.Read full article