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Motor stators, supplied free of charge by ABB, are helping children with bone cancer to walk again.
The children being treated at the Royal Orthopaedic Hospital, Stanmore, have lost part of their leg bones to cancer. Because a large amount of bone has been lost, a prosthesis is implanted in the patients leg to support the remaining bone. As the child grows, the implant must be extended to keep pace with the skeletal growth. This typically involves three or four operations a year over a five-year period.
Eliminating the need for painful surgery, a research team at the University College London (UCL) has pioneered a non-invasive procedure that involves placing a small magnetic rotor in the patient?s leg. This is linked to the prosthetic implant by a gearbox and is turned by an external stator. To increase the length of the prosthesis, the patient?s leg is placed inside the stator core.
When energized, the stator turns the rotor at 3,000 rpm, which drives the gearbox and extends the prosthesis by one millimetre every four minutes. A typical treatment will extend the prosthesis by four millimetres over the course of four minutes.
Quick and painless, the procedure can be performed in a clinic
A combined heat and power plant will be built in Sweden to provide electricity and district heat for the city of Gothenburg.
The plant, to be provided by Demag Delaval Industrial Turbomachinery, will comprise three 43MW gas turbines and a 141MW steam turbine. It will have an overall efficiency of 92.5% and will feed 260MW of electricity into the Swedish grid. The work should be completed by the end of 2006.
The deal forms one of four orders that will make the company a total of ?230m.
The second order is for two 29MW gas turbines, to be supplied to a combined heat and power plant that will provide power for the Russian town of Sochi. The contractor is JSC City Energo, Moscow, and the end customer is RAO UESR (Unified Energy System of Russia). The plant is scheduled for completion by autumn 2004.
The EPC contractor, Technip of Italy, has placed an order on behalf of end customer Motor Oil Hellas. Demag Delaval Industrial Turbomachinery will provide a 17MW gas turbine to a refinery in Corinth, Greece.
The firm will also supply a 100MW industrial steam turbine, with instrumentation, control system and spare parts, to Jindal Power Private Limited in the Belleray District in Karnataka State, India.
American Superconductor has supplied the Tennessee Valley Authority with the first SuperVAR dynamic synchronous condenser, which stabilises grid voltages, boosts service reliability and could help to maximise transmission capacity. The product is said to reduce the threat of power outages by ensuring that supply voltage is properly regulated. The condenser acts as a shock absorber for the grid. It absorbs or generates reactive power, depending on the voltage level of the transmission system. The product also protects against voltage transients caused by lightning storms and other unforeseeable occurrences. The need for utilities to ensure balanced reactive power on their grids has become an urgent priority since the recent blackouts highlighted their vulnerability. ?In today?s digital economy, keeping voltage levels constant and stable is vital,? says the executive vice president of Transmission Power Supply Group, Terry Boston. ?That?s what TVA?s customers expect, and we believe that?s what this new technology will help us deliver.? The SuperVAR synchronous condenser has been installed at TVA?s electrical substation, which serves a steel mill operated by the Hoeganaes Corporation in Gallatin, Tennessee. The company will buy five more condensers if the original purchase proves successful.
Powergen has announced that it will raise its electricity and gas prices from 5 January as a result of pressures facing suppliers.
The price increase is largely due to the sharp increase in wholesale costs, which have risen by over 25% for electricity and 18% for gas in the last twelve months. Other difficulties include the rising cost of gas transportation, system balancing and costs incurred by the Renewables Obligation.
The increase will be an average of 6.9% for electricity and 4.9% for gas. Prices will remain the same for small business contract customers and customers on capped price products until their contracts expire.
In an attempt to help its more vulnerable customers, Powergen says it will not increase the prices for prepayment meter customers until April, with Age Concern and Staywarm customers paying the same prices until the situation is reviewed in spring.
The managing director of Powergen Retail, Nick Horler, says: ?Powergen is not alone in facing these increasing costs but it is the only leading energy supplier not to have raised its consumer electricity prices in seven years. Even as our competitors? electricity prices have gone up over the course of this year, we have held off. With this change, these prices are still 12% cheaper in real terms than they were in 1996 while, for gas, at least eight out of 10 households would be better off with us than British Gas.?
The U.K. renewable energy industry may not reach the government-set target of providing 10% of the country's energy by 2010, according to a report released today by Standard & Poor's Ratings Services. Wind power, which is expected to be the main means of reaching this target, may suffer from under investment. "The Renewables Obligation scheme, introduced in April 2002, may not provide sufficient incentives for investments in renewables," said Standard & Poor's. Infrastructure Finance credit analyst, Jan Willem Plantagie, comments: "The U.K. scheme appears less supportive than in other EU countries. This and other factors mean that the U.K. lags considerably behind countries such as Denmark, Spain, and Germany, despite having a greater abundance of windy weather." The report, entitled "U.K. Blows Hot and Cold Over Wind Power", outlines the challenges faced by the wind power sector in the U.K and examines the current U.K. regulatory framework for wind power projects. It accompanies a more general report, also published today, entitled "Are European Wind Power Projects on their way to Investment Grade?" covering the major credit concerns of wind power projects in Europe. Both reports are available to subscribers of RatingsDirect, Standard & Poor's Web-based credit analysis system, at www.ratingsdirect.com
The use of gas turbines for power generation is well established. The risks associated with it arise from the use of fuel under pressure, often in an enclosure, the high speed rotating equipment, noise, and electrical hazards. There have been a number of major incidents, and a larger number of lesser incidents in recent years. HSE was concerned over these risks and the dangers to personnel.
HSE published the first edition of PM 84 in 2000 as a means of providing guidance to manufacturers, suppliers and operators, and to its Inspectors, on the principles that should be applied to reduce these risks so far as possible.
The first edition of PM 84 was well received and has been widely applied. Following comments from the industry, requests for additional information and references, technical developments, and incident experience, HSE has revised and expanded the guidance.
The risk assessment section has been revised to take account of recent legislation, in particular the requirements of DSEAR, the Dangerous Substances and Explosive Atmospheres Regulations 2002 which implement the Atex "Workplace" Directive.
It is anticipated that the revised document will represent a clear and comprehensive set of guidelines, and will help to improve and maintain a high safety standard in this industry pending the publication of ISO 21789, a new Gas Turbine Applications Safety Standard, which is currently being drafted.
Newey & Eyre has launched a new range of personal protective equipment (PPE) for electrical contractors and installers.
The free catalogue also includes a range from US-based PPE firm, Vallen, and Newey's believe that the selection of core products cover most hazardous scenarios.
For a free catalogue, contact Newey & Eyre on freephone 0800 783 6909.
A new ASDA distribution centre at Lutterworth, part of a ?200m investment in the company?s distribution network, is now protected by an intelligent fire detection system. The Apollo-based fire detection system was designed and installed by Contract Fire Systems to protect merchandise and staff and includes over 400 Apollo Discovery intelligent fire detectors. The Magna Park centre at Lutterworth required a high level of protection but unnecessary interruptions caused by false alarms was unacceptable. The Discovery range includes ionisation and optical smoke detectors, a heat detector, a multisensor (combined smoke and heat) and manual call -point. The five panel-selectable bands available with the range are useful in warehouse environments, where high ceilings mean access to fire detectors for setting and maintenance would be difficult. Programming from the panels enables an installer to stay at floor level during commissioning. The networked, five-panel fire detection system, containing in excess of 400 Apollo Discovery devices arranged over 17 loops, offers a multi-stage evacuation sequence to ensure the safety of the site?s staff, and also has a four-hour fire wall.
Given the recent disturbances on the National Grid, UPS system manufacturers are justifiably expecting a boost to sales. The essential component of their product is the battery and UK?s largest valve-regulated lead acid battery manufacturer Yuasa already devotes 50% of its local output to the UPS market. Its factory in Ebbw Vale, South Wales, produces up to 5.5 million VRLA batteries a year. Managing director of Yuasa Battery Sales UK, Malcolm Howes, says that the death of lead acid batteries has been predicted for the past three decades but the technology goes from strength to strength. ?We change the chemistry of the batteries to suit specific customer requirements. For cyclic operation where long life and reliability is expected, such as wheelchairs and golf carts, we designed a range from 8Ah to 65Ah at a 20-hour rate which provides a high cycle life. The metallurgy, plate design and electrolyte make up a unique chemistry to give the user a reliable low-maintenance product. No-one wants to be stuck on the eighth green and have to carry the clubs home.? Apart from UPS and mobility applications the VRLA battery is widely used in the telecomm sector. The latest models have front terminals, which is a common requirement for that industry, and a float service life of up to 15 years. Although the major part of our production Worldwide is VRLA batteries, Yuasa also make Nickel Metal Hydride (NiMH) and Nickel Cadmium (NiCd) cells for the electronic and instrumentation sectors. Yuasa also expands through acquisition and famous names such as Lucas, Oldham, Crompton and Tungston are part of the group. ?Automotive batteries account for an increasing part of our European sales,? says Howes. ?The modern car is more like a hotel with air conditioning, communications and entertainment systems as well as the traditional starting, lighting and control systems. The requirement of the automotive battery has changed. Here again we look at changing the chemistry to suit the requirement. We are fortunate that our experience of making batteries for our industrial customers allows us to use the knowledge to design and produce more powerful, more suitable batteries for today?s cars.? There is much research into the automotive battery market and applications with voltage changes, new materials and shapes of batteries are being proposed.
Market forces down prices Market forces down prices The majority of local authorities are awarding contracts on the basis of lowest cost, according to a report from the Specialist Engineering Contractors (SEC) Group. The SEC Group conducted the survey among members of the Association of Plumbing and Heating Contractors, The Electrical Contractors' Association and the Heating and Ventilating Contractors' Association. Some 88% of respondents said that the majority of their local authority work continued to be let on lowest price alone, while 60% indicated that quality had not been a deciding factor in the award of any of their contracts. This pattern was repeated by first-line contractors subletting local authority work, with 64% confirming that all of their sub-contracts were awarded on lowest price. Almost 90% reported that most of their direct contracts with local authorities did not involve a partnering element. SEC Group chief executive Rudi Klein urged local authorities to