Cooling and humidity

DRAABE NanoFog In-Room High Pressure Humidifiier

In-room humidity

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Cooling with air humidification: save energy and costs

High temperatures in the workplace place a strain on staff, materials and machinery. The right indoor climate is a key factor not only for quality assurance and the standardisation of many production processes, but also for staff performance and health. Heat stress is constantly increasing due to a lack of air conditioning, machine waste heat and global climate change.

Cooling production and work areas usually requires high cooling capacity and results in high energy costs. Using the principle of adiabatic evaporative cooling, the costs of operating air conditioning units can be reduced significantly. Humidifiers that generate an ultra-fine mist in the room provide energy-efficient cooling and protect both health and materials.

Right: Explanatory video ‘Advantages of adiabatic evaporative cooling’

Cooling and humidity

Advantages Solutions for cooling with air humidification

Adiabatic cooling effect: energy-efficient cooling with air humidification

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Advantages of adiabatic evaporative cooling

High temperatures in the workplace put a strain on staff, materials and machinery. The right indoor climate is a key factor, not only for quality assurance and the standardisation of many production processes.

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Advantages of adiabatic evaporative cooling

The principle of adiabatic evaporative cooling is one of the most sustainable and effective ways to cool. Cooling occurs when cold water evaporates into the surrounding air. The change of state from liquid to gas requires energy, which is extracted from the air in the form of heat. The air cools down as a result of the water evaporating. As this process takes place without any exchange of thermal energy with the surroundings, it is referred to as adiabatic (heat-sealed) evaporation.

In high-pressure nozzle air humidification, cold water is sprayed directly into the room air without dripping. With the appropriate technology and design, the use of this in-room air humidification can significantly reduce the costs of an air conditioning system or lower the room temperature independently of an existing air conditioning system. The principle of adiabatic evaporative cooling results in an exceptionally economical reduction in room temperature: 100 litres of water in a high-pressure nozzle air humidification system absorb around 70 kW of heat whilst consuming only 0.6 kW of energy. This enables an average reduction in room temperature of between 2 °C and 5 °C.

Cooling at virtually no cost

100 litres of water in a high-pressure nozzle air humidifier absorb around 70 kW of heat whilst consuming just 0.6 kW of energy. This can significantly reduce the costs of air conditioning.

Adiabatic cooling effect: energy-efficient cooling with air humidification

The effect of adiabatic evaporative cooling

In-room humidifiers spray microfine water droplets, thereby generating evaporative cooling.

Adiabatic evaporative cooling

In-room humidifiers spray microfine water droplets, thereby generating evaporative cooling.

Start of air humidification

The in-room humidifier is installed on the hall ceiling.

Start of adiabatic cooling

Complete absorption of the sprayed water droplets begins.

Cooling the air using high pressure

In terms of energy consumption and cooling capacity, air humidification using high-pressure nozzles is one of the most efficient methods of adiabatic evaporative cooling. Easy installation, reliable control, low energy costs and good accessibility for maintenance are features that make high-pressure air humidification a compelling choice for a wide range of industrial applications.

In-room air humidification using high-pressure nozzles, the humidifiers are installed directly in the room to be cooled. The high-performance nozzle systems, usually installed on hall ceilings, spray a micro-fine mist there, which is immediately absorbed by the room air and distributed evenly throughout the room. The micro-fine atomisation, with a droplet size of less than 15 μm (15 thousandths of a millimetre), is achieved using high-pressure technology that forces the water through high-performance nozzles at a pressure of up to 85 bar. Evaporative cooling is achieved through the complete, immediate absorption of the micro-fine atomised water droplets into the air. At 700 W, the energy consumption of the high-pressure pump and nozzles is very low compared to other humidification technologies.

Easy installation of in-room humidification

High-pressure nozzle humidifiers can be used either directly within a room or in combination with direct free cooling. In this case, the outside air is first humidified and cooled before being fed into the rooms to be cooled. The simple and flexible installation is independent of any existing ventilation system, making both applications particularly suitable for retrofitting .

Hygiene and the quality of the humidification are ensured by an integrated, multi-stage water treatment system: before the water reaches the high-pressure nozzles, it is purified and disinfected, thereby removing bacteria, germs, suspended particles, salts and other minerals. The connection between the water treatment system and the air humidifiers is formed by special high-pressure hoses, each only as thick as a finger, as well as the power and control cables.

Right on the mark

The level of humidity required for the adiabatic cooling effect is controlled by digital control systems that continuously monitor the climate conditions in the rooms. The high-pressure nozzles are activated with pinpoint accuracy as soon as the humidity falls below the setpoint. Once the maximum setpoint is reached, the humidifiers switch off automatically to ensure that over-humidification is ruled out.

As individually defined humidification zones are established for in-room air humidification, different setpoints can also be implemented for rooms or hall areas with different uses.