Humidification energy costs
Humidification and energy costs
Comparison of energy costs!
Aside from the cost of acquisition and maintenance, the energy costs must be taken into account when comparing the various humidification systems. In an overall comparison, steam humidification systems score least favourably in terms of energy and cost. Electrically heated steam humidifiers use about ten times more energy than nozzle humidifiers, which has a significant impact on the cost-benefit ratio. Furthermore, steam humidifiers also have the undesired side effect of adding heat to the room due to "evaporation".
Nozzle humidifiers have a better energy balance
Compressed air and high-pressure nozzle systems are clearly superior in terms of energy consumption. Compressed air nozzle humidifiers are widely used; water is atomised by using compressed air. Despite their sophisticated technology, these systems are not without their drawbacks when it comes to energy. In particular, the high consumption of compressed air and the energy costs resulting from that, compressor maintenance and repairs, all add up to operating costs running on the high side. Nevertheless, especially for smaller production facilities (up to approx. 4000 m³) using compressed air technology certainly can make economic sense.
Compared with systems operating with compressed air, air humidification systems run with high-pressure create a much larger humidification area of the atomisers (max. 54 kg/h) with only a fraction of the energy costs. These systems use a high-pressure pump (75 bar) and special titanium nozzles to atomise the water into fine mist and without noise. The often frequency controlled high-pressure pump only uses 700 W to operate.
Adiabatic cooling effect
A positive side effect of direct room humidification is the added cooling of adiabatic evaporation. A humidification performance of 100 kg/h provides approx. 63 kW cooling capacity. It is therefore possible to lower the room temperature by between 2°C and 5°C and can thereby lead to reduced utilisation of the air-conditioning system.
Advantages of high-pressure nozzle humidification