LEDs ♦ news digest
Chief Technology Officer at Aixtron. “This second award within a short period of time again confirms the high degree of innovation of Aixtron’s R&D work in close cooperation with our customers.”
With the AIX G5+, Aixtron has created a novel 5 x 200 mm technology package for the existing AIX G5 HT for production of GaN-on-Si devices, offering the industry’s largest multi 200 mm MOCVD reactor. Manufacturers such as the US company Transphorm will build on Aixtron’s advanced GaN-on-Si expertise, expanding productivity from 150 to 200 mm diameter wafers, with the goal of fully exploiting economies of scale from the AIX G5+.
The well-known challenges of GaN-on-Si MOCVD processes are met by the novel features of the G5+ reactor, including modified temperature management, a new gas inlet and a chamber reset procedure. This results in minimization of wafer bow and elimination of so-called melt back effects, maximum process stability and highest uniformity due to a specifically designed rotational symmetry pattern.
Osram LEDs save Parking garage 70 percent in energy Osram Opto’s pilot project
The fluorescent lamps in the Nuremberg parking garage at Jakobsmarkt have been exchanged for intelligent LED luminaires from SchahlLED Lighting as part of a pilot project.
Modules with Duris E 3 LEDs from Osram Opto Semiconductors are installed in each luminaire. An integrated presence detector only switches the illumination from the default basic illumination to maximum output where this is actually required. Combined with the energy efficiency of the LEDs, this function saves an impressive 70 percent on power consumption.
Modern LED luminaires from SchahlLED Lighting’s IPL series have been illuminating the Nuremberg parking garage at Jakobsmarkt since November 2012, replacing the fluorescent lamps previously used.
The LED luminaires were specially designed for applications in low-ceilinged spaces such as parking garages or warehouses. One luminaire has five modules, each fitted with 120 Duris E 3-LEDs, which provide high- quality, energy-efficient light.
“The combination of the luminaires and our low- power LEDs has enabled the operator to slash energy consumption in the parking garage,” explains Andreas Vogler, responsible product manager at Osram Opto Semiconductors. “Whereas one fluorescent lamp with a typical system power draw of 75 W was formerly required for the active illumination of two parking spaces, this is now achieved by just one LED luminaire with 35 W or 15 W in the basic illumination mode.”
Intelligent control reduces the activation period
Using a presence detector, an intelligent control system in the luminaires activates the lighting in the building, only selecting maximum output in the locations where this is currently required. Only if a vehicle is driving through the garage or a pedestrian is moving do the luminaires installed in the vicinity increase their brightness to the maximum output of 35 W. If not activated by the presence detector, they operate at a very much lower basic illumination output of 15 W, saving energy and costs.
As a result, the activation period per parking deck is cut to a third of the former value - or less. “By the time the project had been under way for just a few months, we had already saved a great deal of energy and hence also costs - despite it being the busy winter months. We expect the activation period to sink further in the Osram GmbH summer.
The acquisition costs for the connected luminaires will thus have paid off within as little as about three years,” says Erich Obermeier, Managing Director of SchahlLED Lighting GmbH.
Light solution for the future Osram’s Duris E 3 LED
“After extensive comparative tests, replacing the fluorescent lamps in the parking garage with intelligent LED system luminaires was an easy decision to make, as we consider the LED technology to be a pathbreaking system. We were looking for a future-oriented, energy- saving solution that would cut operating costs, not least because our company also operates other parking facilities,” says Gerald Stuible, Managing Director of the parking garage company.
July 2013
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