SUSTAINABILITY
can be applied to significantly enhance security and traffic flows. A major challenge in any building is how to move staff and visitors around at busy periods. A traffic simulation programme – typically used for buildings of five storeys or more – will assess the expected numbers to develop a lift strategy and help avoid queues forming in lift lobbies at peak times.
A BREEAM credit can be awarded by demonstrating this analysis of transport demand and how it has been used to calculate the number, size and speed of lifts and that the lift solution with the lowest energy consumption has been specified.
After this, a second BREEAM credit can be achieved with the specification of at least three of the following energy-efficiency features for lift systems:
• A standby mode for use during off-peak and idle periods, for example, so car lighting and ventilation can be switched off. Modern lifts can consume up to 40% less energy when in standby mode and yet ‘wake up’ is instantaneous
• Energy-efficient lighting for the ceiling car and operating panels. A good lift manufacturer will offer LED lighting as standard, which has a service life up to 20 times longer than standard bulbs and consumes less energy. The lighting should also switch off when a lift has been static for a pre-determined length of time
• Variable frequency drives to control speed, voltage and frequency of the drive motor
• A regenerative drive system so any surplus energy generated by the traction lift is returned back to the electricity grid or used elsewhere in the building. This feature is most effective in high rise schemes.
CAPITAL ALLOWANCES FOR ENERGY-SAVING
EQUIPMENT The Enhanced Capital Allowance scheme was set up by the
www.tomorrowsfm.com
Government to encourage more businesses to invest in energy- efficient technology and help reduce carbon emissions. Available for all businesses that pay corporation tax or income tax in the UK, regardless of size, sector or location, the initiative provides 100% of first-year capital allowances on investment in new energy-saving equipment, such as lift systems.
When a building owner or occupier purchases a product that is specifically listed under the scheme – called the Energy Technology List – it can benefit from this tax saving. The variable speed components of a number of Schindler lift products, for example, have been assessed and meet the criteria to be included on this list.
VDI RATINGS VDI4707 Part 1 Lift Energy Efficiency
sets out a series of guidelines and categories which combine to give an overall energy efficiency rating for a lift system.
The ratings range from category ‘A’ to ‘G’, with ‘A’ being the highest level. Factors such as standby and travel energy, frequency of use, travel height and speed are combined to provide this useful assessment.
The most reliable and comparable performance can be achieved by using benchmark simulations that reflect the expected behaviour of a group of lifts under a wide range of traffic situations. By carrying out this assessment as part of the specification and design process, the energy efficiency of a building can be improved.
It would consider: Traffic performance,reducing time to destination, optimising space or tailoring the lift system to specific project requirements.
These factors all contribute towards reducing energy consumption and carbon emissions for new lift installations and will continue to increase in importance in the drive for global sustainability.
www.schindler.com/uk/cpd TOMORROW’S FM | 41
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