Ventilators are the key ingredient of the HVAC (Heat, ventilation and air conditioning) systems. More than 50% of household Energy is used to run packaged air conditioners [1]. Hence the the improvement of the aerodynamic performance ventilators results in large electricity savings.

Apart from perfomance improvement, one also can accountfortheeffects such as noise generation. It turns out that some subtle changes such as the clearance between the blade and the casing, influence the noise level significantly. In one of our previous desings the reduced clearance accounted for the 15% difference in the noise intensity!


Did you know that more than 90% of the life-time costs of a pump are due to the energy consumption [2]? Or that more than 20% of the electric motors all over the world are used to run pumps [3]?

That proves that even slightest improvements in the pump design would result in massive cost saving overall. However, at some level of advancement only fine CFD flow simulations would give enough insight. Using CFD analyses you would be able to:

- increase the energy efficiency of the system by rdusing the unnecessary pressure drop inside the pumping system

- decrease the noise level – when the flow is not smooth, extra turrbulence and separation induce noise generation – thta can be dealt with at the design stage

- test wether already existing pump designs are suitable for different operating conditions (for instance by changing water to oil) without resorting to expensive experimental testing


[1] D. Westphalen and S. Koszalinski, "Energy Consumption Characteristics of Commercial Building HVAC Systems Volume I: Chillers, Refrigerant Compressors, and Heating Systems," Final Report to the Department of Energy (Contract No. DE-AC01-96CE23798), 2001

[2] Hovstadious, G., Industrial Energy Efficiency Project: Pump Systems Optimization – End User Training. Cape Town, March 2012

[3] LØchte, J: “Energy Savings With Pumping Operations”, Water Institute of South Africa (WISA) Conference 2012, Cape Town, May 2012, pp.1