Return on Investment
In the case of IG Blower, Eriksson says “The solution obtained from TURBOdesign1 was completely new to us but optimising the fan impeller design may reduce the noise generation by 5 to 6dB.”
In this case the key aim was to reduce the fans diameter while maintaining performance. Eriksson says “The fan impeller diameter was reduced considerably without compromising performances and, very important, efficiency.”
FLEBU delivers ID fans with power of up to 3 MW to all major manufacturers of Exhaust Gas Cleaning System (EGCS). ID Fans are used to extract the exhaust gases from the boiler in modern power plants. The present legislation regarding emission control from these plants has considerably increased the requirement on the EGCS of which the ID Fan is a part of. To stay competitive, FLEBU has constantly been looking for new solutions to reduce costs and improve performance.
“In this case, we used TURBOdesign1 to solve two challenges” says Eriksson. “First we want to reduce the size, these fans can be of up to 3.5 meters in diameter and manufactured in expensive materials, therefore even a small reduction in impeller size can lead to a large reduction in manufacturing costs. We also want to slightly increase the rotation speed in order to make it possible to implement the use of motors with a lower number of poles that in turn reduces the total cost of the motor significantly. The problem is quite complex, strength, resistance to fatigue, critical speed and natural frequencies are all conflicting parameters that had to be addressed. One unique strength of TURBOdesign1 is the ease by which you obtain a new optimized blade shape for each modification of the wheel design. This way we can experiment with different designs to solve strength and fatigue problems and still very quickly obtain the optimum blade shape. Once again, the capacity tests made on the first prototype were very convincing. The fan impeller diameter was reduced considerably without compromising performance and, very importantly, efficiency”.
“TURBOdesign1 has given new answers to really challenging problems” concludes Eriksson “it also raises new questions… Now we realise that it is only our own imagination that sets the limits to how we can develop optimum solutions for coming projects. With TURBOdesign1 we will raise the concept of ‘tailor-made’ fans to a new and much higher level.”