Power Generator Hire Company Provides Carbon Neutral Energy
Prompted by customers’ environmental concerns, Mather and Stuart Generators Limited, one of the largest generator hire companies in the UK, is to make all hires green. In a deal with Crown Oil UK all diesel for the temporary generator sets it supplies throughout the UK will be totally carbon offset.
Mather and Stuart specialise in providing temporary power to clients in construction, industry and commerce where mains supplies are not available as well as areas like education, leisure and retail. The company fill the gap when new mains are not installed in time, if there are other outages due to cables being severed or stolen, or if there are other faults on the distribution network.
“With a hire fleet of over 800 generator sets, we believe that this is a significant
move for Mather and Stuart and a big win for the
environment,” explained director Mark Stuart. “We have been looking for some time for ways to respond to customer concerns about the environmental impact of our temporary generators and using the carbon offset diesel product from Crown Oil UK provided a straightforward solution.”
The Crown Oil UK carbon offset product is commercial diesel for which they have bought high quality carbon offsets. The offsets support world-wide energy conservation projects, such as the planting of trees to create carbon sinks, or other programmes to actively reduce carbon emissions. This means that the carbon released by the burning of the diesel is effectively cancelled out. “Offset diesel is
available for use in any on-site plant that is normally fuelled with red diesel. This may include not just generators but pumps, site vehicles, excavators, cranes, piling rigs and any other site plant,” explained Mark Andrews, group general manager at Crown Oil UK.
Bio-Diesel was considered as an alternative to carbon offset diesel but was rejected for technical and ethical reasons. “Generators are often a distress hire and the last thing the customer needs is further technical glitches. Obtaining fuel from what is essentially a food resource also has ethical implications that make us uncomfortable,” Mark Stuart explained.
www.crownoiluk.com
Food Industry Technical installs ABB drives at Claridges, London to offer substantial savings
Luxury hotel Claridges, London is benefiting from a 30 percent reduction in energy costs after the installation of two 11 kW ABB variable speed drives (VSDs) to control air supply and extraction in its kitchen.
The VSDs are installed by ventilation control system specialist Food Industry Technical (FIT) to lower energy costs and reduce CO2
output as part of the hotel’s
total kitchen refit. The upgrade will see total energy savings of over £10,000 per year.
FIT supplied a cooker hood system that automatically reacts to conditions in the kitchen, ramping up extraction during busy times and reducing flow in quieter times. By controlling the extraction and supply fans to match the needs of the application, significant energy savings are achieved. Previously the cooker hood system was consuming over 450 kWh per day, but after the installation of FIT’s system incorporating ABB drives, energy consumption fell to 315 kWh per day. The installation will save the hotel just under 50 tonnes of CO2
per year and achieve return on investment in 1.8 years.
The fans were running at 100 percent at all times prior to the installation of the FIT system. However this method wastes energy, but using VSDs to control fan speed brings more accurate control and
18 energy solutions
uses less energy. VSDs match the speed of the fan to the demands of the application so just enough energy is supplied to extract and supply fans at all times, saving money.
FIT installed its Cheetah™ cooker hood extraction system into the kitchen. At the heart of the system are two 11 kW, IP54 ABB standard drives for HVAC controlling the extraction and supply fans. The system incorporates a range of sensors measuring temperature, smoke, steam and airflow in the extract and supply ducts in order to determine the fans optimum flow rates, enabling conditions in the kitchen to remain constant at all times. To enhance safety the system also incorporates a gas isolation module for cutting off the gas supply in case of emergencies.
“The sensors measure activity in the kitchen and constantly send signals to the drives adjusting the fans to meet demand,” says Peter Evans, sales director FIT. “As a safety measure, the system also monitors flow in the exhaust duct and supply duct. If the extract or supply duct loses air supply, the gas isolation module automatically shuts down the
Building & Facilities Management – October 2010
gas supply, ensuring that gas levels do not build up in the kitchen.”
The system also features a fail safe mechanism to further enhance safety – in the event of a control cable being severed, or a sensor failing, the drives will automatically ramp up to 100 percent and stay there until the fault is rectified, ensuring air supply to the kitchens remains at safe levels.
For more information on ABB drives, freephone 07000 374 837 or email
energy@gb.abb.com quoting reference “drives”.
www.abb.co.uk/energy For further information about FIT and their energy control system, please contact 0118 973 9310 or email:
enquiries@foodindustrytechnical.com
Energy Solutions
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