Plant Management
Fig. 1. Installing new lighting technologies, together with lighting controls, can result in savings of over 50 per cent in terms of energy consumption and cost.
Using the latest lighting control technology to cut energy bills can save engineering industries significant unnecessary expenditure. Dr Andy Davies, brings us up to date on the latest developments.
Die Verwendung der neuesten Lichtsteuerungstechnik, um die Stromrechnung zu senken, kann der Elektronik-Industrie wesentliche unnötige Ausgaben sparen. Dr. Andy Davies informiert über die neuesten Entwicklungen.
Utiliser les technologies de contrôle de l’éclairage les plus récentes pour réduire les factures d’énergie peut éviter aux industries d’ingénierie des dépenses inutiles considérables. Le Dr Andy Davies nous informe des dernières évolutions en la matière.
Good lighting control prevents energy wastage
T
he International Energy Agency has reported that the installation of energy efficient lighting systems across the world could cut global energy consumption
by as much as 10 per cent, providing opportunities for financial savings. Lighting is, on average, responsible for as much as 40 per cent of electricity costs in offices and 50 - 60 per cent in factories and warehouses. Of course, lighting is not only heavy on
the pocket but also has a major impact on the environment. The amount of carbon dioxide produced globally from generating electricity for lighting is three times higher than the emissions produced by aviation. With carbon dioxide the largest of the trace gases and currently responsible for 60 per cent of the ‘enhanced greenhouse effect’, anything that contributes to lowering this figure is welcome. Recent advances in LED technology have
led to more sophisticated lighting control solutions being available than ever before. The inherent controllability of LEDs – being easy to dim and instantly switchable – offers significant opportunities for energy savings. Dimming lights, for instance, saves energy even though the difference in, say, a lux level
of 100 per cent and 90 per cent is usually imperceptible to the human eye. Installing new lighting technologies,
together with lighting controls, can result in savings of over 50 per cent in terms of energy consumption and cost, which is likely to lead to a dramatic growth in the lighting controls market. Industry analysts expect this sector to more than double by 2020.
Technologies and control strategies Lighting control systems can typically be divided into two categories: those that are integrated with Building Automation Systems (BAS) and those that are dedicated lighting systems such as DALI or Analogue 1–10V control for dimming. A growing trend towards complete building automation, however, means that even standalone systems can now be connected to the BAS via a gateway device. The most common strategies for lighting control installations are:
■ Daylight harvesting, where natural daylight is used to contribute to the lighting in the building and lights are dimmed accordingly based on measurements from photocell sensors;
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