Sound and its effect on people is increasing pressure on the requirement for building and industrial sites to lower sound emissions. Cooling towers needing to be exposed to the atmosphere and allows free movement of air, can present a problem in achieving the required sound levels. Attenuation is expensive and increases energy consumption.
With the majority of sound energy being created by the fan of a cooling tower the selection of a low noise fan is paramount in achieving the desired sound levels for the cooling tower.
At CHTS we feel that achieving the desired sound levels requires that the fans for each project be selected individually. We do this for two reasons:
What this may mean is that we will purposefully oversize the cooling tower to achieve the required sound levels from the fan and in doing this we will also achieve a cooling tower which can then easily achieve more than the specified thermal load with reduced energy input. This proves useful in providing additional thermal performance for future changes or additions.
To be able to confidently select fans at varying loads we need to be sure of the information provided by the fan manufacturer. The (FAN DATA) shown is typical for every fan selected by CHTS for low noise applications and this information allows optimisation of the tower and fan selections.
CHTS make this type of concise and detailed information freely available to its clients so they can compare real information against our competitors. Other information is also provided such as resonant frequencies and torque requirements.
This information allows us to accurately know if the fan can achieve not only the sound levels but also if the motor and drive are suitable for the project. This allows refinement beyond just a duty point selection.
While everyone else is looking at the price we are looking for the benefits for the client.
An example of this:- with these low noise fans we use Stainless Steel hardware which makes future maintenance an easy procedure and makes the fans easily adjustable in situ. The blades are either FRP or aluminium in a true aerofoil shape. All designed to keep future costs to a minimum as well asensure ongoing operating efficiencies.
Each fan is delivered with a balance test certificate to show that the fan has been individually balanced to less than 6.3 m/s.
All this allows CHTS to confidently approach any new or existing project where sound may be an issue. It allows cost effective reduction in sound levels and minimises energy consumption. Reducing operating and maintenance costs.
AT CHTS we consider the whole picture not just one small part of the puzzle to give the best possible outcome for our clients.
