Adiabatic cooling NL-VK

Adiabatic cooler NL-VK - summer freshness for your buildings, inexpensive and environmentally friendly

Production machines, ovens etc. generate high heat loads in hall buildings. Room temperatures of over 30 °C are quickly reached, making it difficult for employees to concentrate and work productively. But even in warehouses and logistics halls, a temperature level is quickly reached during the summer months that makes it increasingly difficult to work properly.

The nordluft adiabatic cooler NL-VK is a highly efficient and effective solution, providing fresh and cool air in a natural way. While the warm outside air flows through the moistened cooling combs, the water absorbs the heat from the air and cools it significantly (evaporative cooling / adiabatic cooling). 30 °C warm air can thus be cooled down by up to 10 °C. The warmer and drier the air is, the more efficient the system works. And the costs of evaporative cooling are up to 85% lower than with conventional air conditioning, with significantly lower investment costs at the same time.

The Molier h-x diagram in the gallery illustrates, in regards of the evaporation cooling efficiency, the relationship between the supply air temperature and the heat and humidity of the outside air. It is assumed, for example, that the outside temperature will be 32 °C and the relative humidity 40 %. Under these conditions, a supply air temperature of 22.8 °C can be achieved. Evaporative cooling works without coolant and is therefore environmentally friendly. The systems supply 100% fresh outside air and thus increase the air quality in the buildings.

The advantages of evaporative cooling at a glance:

  • Significantly lower investment costs in comparison with conventional air conditioning
  • The system provides 100 % fresh outside air
  • Evaporative cooling works without coolant
  • Can be used in production halls and warehouses, shopping malls or exhibition halls, etc.
  • Main device including supply air temperature controller
    • Remote panel (touch) 4'
    • External air: temperature and humidity sensor
    • Inside air: temperature and humidity sensor
  • Slave device, regulation via master device

FAQ - adiabatic cooler NL-VK

How sustainable is the cooling process with an adiabatic cooler?

In comparison to other ventilation options, the adiabatic cooler needs less power to achieve more performance (1kW electricity for up to 40kW cooling power). The ratio of other cooling options is only 1kW for 5kW of power. Even on hot summer days, the consumption of the NL-VK remains low.

What does it cost me to cool my building with an adiabatic cooler?

When you compare it to other ventilation options, you can save up to 80% by using an adiabatic cooler. On top of that, our NL-VK is more beneficial in terms of purchase and maintenance costs. That is because the adiabatic cooling needs 90% less electric energy then the mechanical cooling process.

Which temperature reductions can be achieved with the adiabatic cooler?

During the summer, production halls can get heated up very quickly through high outside temperature and high inside thermal loads. Depending on the outside temperature, there will be reductions of more than 13K. By using more tools like ceiling fans and by reducing inside thermal loads, the reductions can be even higher. Furthermore, pollutants are transported to the outside and fresh air comes to the inside.

Can adiabatic cooler increase the air humidity inside a room?

Many customers fear that a tropical climate with high humidity is the result of using nd adiabatic cooler. This wil be prevented with the right concept. First, cold air comes into the room and absorbs hot air. This then gets transferred away by using a ceiling fan for example. By doing this, we prevent the increase of air humidity inside the room.

How are Legionella prevented on the adiabatic cooler NL-VK?

The cooling pad that is made out of cellulose inside our adiabatic cooler NL-VK could potentially be beneficial for bacteria and fungi. To prevent that, the VDI 6022 states: " Recirculating air humidifier. The spread of pathogens such as Legionella and Pseudomonas aeruginosa through the humidifier water has to be prevented. [...] During times of operation when no humidification of the air is required, the water-carrying system parts shall automatically be emptied completely and dried after 48 hours at the latest. [...]"

nordluft makes sure that the water-carrying system and the cooling pad is exchanged in intervals of less than 24 hours to ensure that there will not be stagnant water. The exchange therefore happens in intervals that are even shorter than required by the VDI 6022.

Furthermore, because of the present system in our cooler, no aerosols are transported through the air. The water evaporates on the surface of the combs and increases the air humidity of the supply air. The combs possess a bi surface area to increase the evaporation. Because of this and the therefore slow passing speed of the air (< 1,5 m/s), the aerosols are not carried away.

If you have more questions, feel free to call or message us and we will be happy to help you.