Adiabatic evaporative cooling
In-room humidifiers spray microfine water droplets, thereby generating evaporative cooling.
Advantages of adiabatic evaporative cooling
In-room humidity
Cooling at virtually no cost
Cooling production and work areas usually requires significant cooling capacity and results in high energy costs.
Costs can be reduced through in-room air humidification and the principle of adiabatic evaporative cooling.
Can replace air conditioning
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A fresh indoor climate
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Energy-efficient cooling
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Adiabatic evaporative cooling
Cooling effect of direct air humidification
Adiabatic evaporative cooling
Temperature is a key process parameter for many manufacturing stages. For example, the temperature of the materials being processed must not exceed certain maximum limits. Furthermore, excessively warm indoor air has a direct impact on humidity: as the temperature rises, relative humidity falls, with all the associated negative consequences (e.g. for ESD protection). Last but not least, high temperatures are also a strain on staff.
An interesting and cost-effective benefit of in-room air humidification for specific applications is the reduction in room temperature achieved through adiabatic evaporative cooling. The complete absorption of the micro-fine water droplets in the air causes heat to be extracted from the room. The principle of adiabatic evaporative cooling is the same as that of ‘sweating’. Sweat evaporates on the skin. The heat required for this is drawn from the surroundings. The skin cools down.
The effect of adiabatic evaporative cooling
In-room humidifiers spray microfine water droplets, thereby generating evaporative cooling.
Humidification can take the strain off the air conditioning system
The adiabatic cooling effect achieved through air humidification can complement the use of air conditioning and, depending on local conditions, may even replace it. An average reduction in room temperature of between 2°C and 5°C is possible. For every kilogram of water that evaporates into the air via the nozzle humidification system in one hour, a cooling capacity of 640 W can be achieved. Applied to a humidification system with a capacity of 100 kg/h, this results in a cooling capacity of 64 kW.
Compared with the energy consumption of the 0.6 kW high-pressure pump used for high-pressure nozzle air humidification, the energy balance of adiabatic cooling is extremely positive and economically attractive.
Right: Explanatory video ‘Adiabatic cooling’
Latest whitepaper: "Cooling"
Advantages of adiabatic evaporative coolingHigh 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.
A fresh indoor climate with humidification
In-room humidification has the added benefit of pleasantly refreshing the indoor climate. The very fine, almost invisible mist of water released directly into the room ensures that the air absorbs moisture quickly and immediately.
The result is a pleasantly fresh indoor climate that revitalises and has a beneficial effect on the skin, the respiratory tract and the entire body. This reduces stress and enhances well-being in the workplace. In addition, high humidity cleans the air of dust particles and fine dust. An optimal humidity level of between 40 and 60% causes dust particles to settle more quickly and reduces the risk of inhalation.
Case study: Energy-efficient cooling at Argelith
To reduce the high heat loads at Argelith caused by the thermal processes involved in production, the company uses the ML Flex high-pressure nozzle system. Compared to chillers and recirculation fans, the adiabatic cooling effect of air humidification lowers the temperature in the production area with minimal energy consumption—just —whilst simultaneously capturing dust.
The Condair ML Flex air humidification system is powered by a high-pressure pump and cools the ambient air via a stainless steel nozzle array. By positioning the humidification units individually, heat loads and stress on employees can be specifically reduced. The energy costs involved are negligible.
Argelith Bodenkeramik H. Bitter GmbH, Bad Essen (Germany)
“100 litres of water from a high-pressure jet humidifier absorb around 70 kW of heat whilst consuming just 0.6 kW of energy. Adiabatic in-room humidification is a manageable investment with a significant impact.”
Markus Aulbert, Energy and Environmental Management at Argelith
Volkswagen Nutzfahrzeuge AG, Hannover (Germany)
The Volkswagen plant in Hanover is the main plant of Volkswagen Commercial Vehicles, an independent brand of the Volkswagen Group. With a total area of 120 hectares and over 14,000 employees, it is the largest production facility for the Transporter and Amarok series.
Facebook / Meta, Sweden
This data centre in Lulea Sweden is one of the world™s most efficient and sustainable data centres. It is powered with locally generated hydro-electric energy and uses the cold Nordic air to cool the servers that store Facebook users˜ photos, videos, comments and likes.
Condair evaporative humidifiers add up to 22,800 litres per hour to the air in the penthouse ventilation systems to maintain the humidity to ASHRAE standards across the data halls.
Condair evaporative humidifiers add up to 22,800 litres per hour to the air in the penthouse ventilation systems to maintain the humidity to ASHRAE standards across the data halls.
Hella GmbH & Co. KGaA, Recklinghausen (Germany)
In-room humidification can be used both for conditioning the room air and for process cooling. The automotive supplier HELLA in Recklinghausen makes use of the principle of adiabatic cooling with additional air humidification.
Argelith Bodenkeramik H. Bitter GmbH, Bad Essen (Germany)
Argelith Bodenkeramik H. Bitter GmbH (Bad Essen) is one of the world's leading companies as a manufacturer of high-quality industrial tiles. In order to reduce the high heat loads caused by the thermal processes of production, the company uses direct room air humidification.
Find out more about cooling with in-room humidification
DRAABE high-pressure system
In-room humidification for any room size with full-service maintenance
Basics and retrofitting
Condair Direct Room Humidification: The solution for existing buildings and every application
Indoor evaporative cooling
Adiabatic evaporative cooling lowers the room temperature, saves energy and improves the indoor climate.
Safe: Humidify directly in the room
Maximum hygiene, safety and performance for air humidification systems: service and maintenance packages including unit replacement, extended warranty and VDI certification
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