Uninterruptible power supply from Caterpillar
Caterpillar Inc. has developed a new flywheel-based uninterruptible power supply (UPS). The system can be used for a wide range of applications, including internet data centres, telecommunications, broadcasting facilities and critical manufacturing processes.
The system provides stored energy that is immediately available to cover utility-power voltage sags, surges or outages. When the UPS is combined with a Cat generator it can protect from brownouts and blackouts. When the system senses a power disturbance, the flywheel instantaneously supplies power in place of the utility.
A standby engine generator can be used to supply power for an extended period. To increase total system reliability, the UPS also has the ability to send a start signal and provide redundant starting power to a standby genset. After the event, the UPS returns to a normal standby state and the flywheel recharges, either from utility power or the standby generator.
The Cat UPS is contained in a clean, safe flywheel that eliminates the temperature restrictions, hazards, space and failure potential associated with battery-based UPS systems, and because the system is battery-free it is therefore a more environmentally friendly system.
The UPS has an unlimited life cycle, high overload capability, minimal heat rejection, higher efficiency, minimal maintenance, greater heat tolerance, and fast recharge. Because of the high effecency and low maintenance of the system the operating costs for the UPS are significantly reduced.
The system contains a easy to read LCD panel, audible alarms, paging, e-mail notification, and a micro processor-based operation that allows for programmable gen set walk-in and other set-up parameters.
The recently constructed Najima pumping station in Dubai has installed two Cummins Power Generation gensets.
The two gensets will provide automatic power on a mains failure, and will be powered by the Cummings KTA50G2 diesel engines. They have been installed for automatic paralleling duties and both sets include twin silencers to ensure noise levels are reduced. Each set is rated at 1.28 MW.
The pumping station is located in the Al Quos district, 25 km east of Dubai, and supplies the southern part of the city and the expanding Najima industrial complex. Constructed by Ghantoot General Contracting for Dubai Electricity and Water Authority (DEWA), the new station is an extension to an existing pumping facility.
New integrated controllers from DEIF
Danish company DEIF has introduced a new generation of integrated genset controllers.
They have used the experience gained from their first generation of multi-function products to produce a flexible modular hardware platform. This means that different products in the line are based on the same hardware platform configured to different options using plug-in modules.
Consumer surveys carried out before production showed that most clients wanted “a perfect matching solution”. This new product meets that need as users will always deal with the same product, whether it is used just for protection, synchronization or load sharing. To make the process easier, the design has included an optional display unit to navigate through the menu of the product.
New gensets launched by Volvo Penta
Volvo Penta, one of Europe’s leading suppliers of genset engines, has now extended its range to include four new units. The new units, which feature in the 5-7 litre range, are modern, direct injection diesels with low emissions and noise levels, and are economic in operation.
This means that the Volvo Penta range now covers 80 to 500 kVA/50 Hz prime power and 80 to 500 kWe/60 Hz standby power.
The TD520GE and TAD520GE are 4.8 litre in-line four cylinder direct injection diesel engines with turbo charging. The TD720GE and TAD720GE are 7.2 litre, in-line six cylinder diesels, also with turbo charging. The TAD units feature an aftercooler.
The 520GE and 720GE have smaller external dimensions and lower weight compared to other engines with the same power output.
The four new engines all fulfil the TA-luft and EPA/CARP, D2-cycle emission regulations as the sturdy and rigid design means low vibrations and reduced noise levels. Low fuel consumption is achieved by single injection pumps, high pressure injection, low swirl combustion and closed crank case ventilation.
Other technical features include a crankshaft with integrated counterweights, spray cooled three ring aluminium pistons, wet cylinder liners and an integrated oil cooler.
Low cost heating
A new scheme to provide over 400 flats with low cost heating as been set up in Manchester in the UK. The project, which has cost £11 million ($16.5 million) is part of the ‘affordable warmth’ strategy set up by Manchester City Council, and will use combined heat and power (CHP) engines supplied by the Gleeson group.
Gleeson is also the parent company of Powerminster Limited, which provided the technical and build expertise for the scheme.
Powerminster Limited removed the electric heating systems from six 1960s residential tower blocks. These heating systems were out of date, inefficient and expensive to run and have been replaced by the CHP systems that will provide electricity at £0.024/kWh – well below the price of electricity for heating, and will also reduce CO2 emissions.
Six standby sets for European network
Six Cummins Power Generation standby generating sets have been installed at German switch centres as part of a European-wide fibre optic network development project.
Cummins’ KTA19G4 diesel engines power the CP500-5 genset, which is rated at 500 kVA. These standby sets have the ability to supply power within 15 to 20 seconds of an outage.
The switch centres are based in Cologne, Dortmund, Bremen, Liepzig, Dresden and Nuremburg. They are part of Viatel’s pan-European fibre optics network which covers 42 major cities in Belgium, France, Germany, the Netherlands, Switzerland and also the United Kingdom.
This fibre optic network is capable of supporting voice, e-commerce, and advanced data services as well as multi-media applications.
The project began back in 1998, when Bechtel European telecommunications won the contract for the construction management, programme management and engineering for the fibre optics project. The scope of Bechtel’s contract included cable laying under the North Sea and procuring standby gensets.
By the end of 1999, Bechtel had completed three out of five cable laying rings, connecting the UK, Germany and France.
The final two rings will link up Southern and central France, as well as Switzerland.
Sainsbury’s award-winning millennium supermarket store in Greenwich, near London in the UK, has installed the new RandTech GEM (green energy module) combined heat and power (CHP) system.
The CHP engines can be fuelled by either natural gas or by diesel oil. The engine driven alternator generates electricity, while the engine heat is reclaimed via integral heat exchangers.
This allows the GEM210 engine to produce £204 ($361) worth of electricity, and £74 worth of hot water for every £100 of gas consumed.
The CHP systems are also exempt from the UK’s proposed climate control levy, which is due to come into force from April 2001.
The green energy module systems range from the GEM44, which has a electrical output of 44 kWe, to the GEM300, which is rated at 3 MWe.
The CHP system has a number of applications, for example, process machinery, heating equipment or air conditioning systems. It is also available on short or medium-term rental agreements