DC axial fans cool telescopic primary mirrors
Small fan for a wide view
The Orion Nebula with its huge hydrogen clouds is around 1,500 light years away from Earth. Compact fans from ebm-papst cool the primary mirror of the telescope at the Weikersheim Observatory, allowing a view of the almost infinite expanse.
A Richtey-Chrétien telescope from Alluna Optics, which is located in the observatory in Weikersheim, provides a view of this unique spectacle from Earth. Three compact fans from ebm-papst are also crucial for a clear view of the starry sky. These are installed directly behind the main mirror of the telescope, from where they cool the mirror to ambient temperature before the telescope is used. They also prevent the air from billowing when heat rises from the mirror by providing a continuous flow of air during use.
Reliability and robustness
Wolfram Felber, Managing Director of Alluna Optics, explains the decision in favor of ebm-papst primarily in terms of the quality and durability of the fans. "We sell our telescopes worldwide, including to Tibet, Kazakhstan and the Australian outback. Reliability is extremely important because customers don't want to wait two weeks for a replacement fan." In addition to robustness, high performance in a small space is also an advantage. Felber: "There is not much space in the telescope, as other components also have to be accommodated there. Nevertheless, the compact fans manage to cool down the mirror quickly, even on hot days."
Durable and flat
The DC axial fans used have a size of 92 x 92 x 25 millimetres and are made of glass fiber reinforced plastic. Such a compact fan weighs just 100 grams, is quiet in operation and energy-efficient. It is also durable with a calculated life expectancy of 135,000 operating hours. Axial fans are suitable for high air performance with medium pressure build-up. The air flows through the fan blades parallel to the axis of rotation. as
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