Dry coolers are a natural supplement to our programme of Wacond Standard and Module cooling towers. In a cooling tower the water is in direct contact with the air. Cooling of the water happens by evaporation. It is the wet bulb temperature which is the lower limit and in practice the water can be cooled down under the ambient air temperature.
In a dry-cooler there is a finned tube wall between water and air and cooling of the water is made by heating up the air. In this case the air temperature is the lower cooling limit.
Advantages by the air cooled system
no consumption of water
no consumption of chemicals
a minimum of service
it is easy to prevent frost by using anti-freeze liquids.
no evaporation clouds at low air temperature
Effective high-quality radiatior coolers
The dry-coolers of Vestas Aircoil are based on many years of experience and a well-tested calculation programme. The production is controlled according to ISO 9002.
When to use dry-coolers
Dry-coolers are usable in all the plants where water is used in a process to remove the excess heat and where the temperature range between the water and the air is adequate. The temperature range should be at least 5 °C. It is recommandable that the range is 8 - 10 °C above the design ambient air temperature.
Often it can be an economical advantage to use dry-coolers for cooling/chilling during the cold period of the year and another type of cooling system during the warm period/summer.
Dry-coolers - also known as radiator coolers - are used in power-plants, diesel- or gas generator plants, waste treatment plants, biogas-plants, but also in other segments as for instance plastic-production, hydraulic processes, glassworks, gardenings, the machine industry, and the wood industry.
Low energy comsumption and low noise level.
The decisive factor when talking about low operation costs is a low energy comsumption. Thus we have focused a lot on the fan arrangement:
The inlet profile - on the noise absorbing fan casing made by formshaped UV-protected plast, is moulded as an ellipsis bue in order to conduct the air to the fan with a minimum of turbolence.
The outlet opening is constructed with a diffusor in order to regain pressure. The result of the two initiative is a lower energy consumption and a lower noise level compared with a standard sharp-edged fan house made of thin plate.
The broad bladed fans of polypropylene are aerodynamically moulded to get a low noise level and a low energy consumption.
Low energy motors are applied.
Temperature controlling systems, which minimizes the working hours, are supplied as accessories.
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SMED HANSENS VEJ 13