Ziehl-Abegg.has showcased the new generation of ZAplus fan units which feature significantly reduced sound emission levels and energy consumption.
Chief technical officer, Dr Sascha Klett said these features eliminate the need for additional sound insulation.
“This will please supermarket operators just as much as industrial operators of systems fitted with chillers,” he said.
Klett said the company is calling it a new development because the modifications are of a fundamental nature.
“The experts have once again put their faith in models drawn from the natural world and incorporated a number of biomimetic aspects into the technical design,” he said.
“We are reducing noise by up to four dB(A).”
For comparison: six dB(A) represents a doubling of the noise. This is achieved with the help of a further development of the familiar biomimetic fan blade with a serrated trailing edge.
The previously standard guide vane for the more targeted handling of the airflow (keyword throw distance) has been fine-tuned: the smaller guide vane now has 17 struts instead of the usual 11. And the spacer ring has been biomimetically enhanced.
Klett said technicians will be amazed at the installation dimensions.
The outside dimensions remain standard (1070 millimetres) but the inner diameter is increased from 910 to 960 millimetres.
Also the rotor and blades, which were previously manufactured out of solid aluminium, will now be replaced by a high-strength composite material.
Readings taken from a first customer device have shown energy savings of nine per cent, according to Ziehl-Abegg.
Mass production will commence mid-2023.