Every employ­er must pro­vide its employ­ees with appro­pri­ate work­ing con­di­tions. This is espe­cial­ly impor­tant in var­i­ous types of indoor envi­ron­ments where poor air qual­i­ty expos­es occu­pants to adverse health con­di­tions. What can be done to ensure opti­mal indoor air para­me­ters?

Air humid­i­ty and human health

Air qual­i­ty is of great impor­tance for the health of a per­son in enclosed spaces. A room that is too dry or damp can not only cause dis­eases, but also reduce well-being, and there­fore, work­ing capac­i­ty. It is best when the air tem­per­a­ture is in the range of 20–22°C, and its humid­i­ty is between 40 and 60% rel­a­tive humid­i­ty. The last fac­tor is espe­cial­ly impor­tant, because the cor­rect humid­i­ty of the air:

  • reduces elec­tro­sta­t­ic stress,

  • min­i­mizes the risk of infec­tion

  • and also pre­vents the spread of mold, bac­te­ria and microor­gan­isms.

How to main­tain suf­fi­cient humid­i­ty?

One of the ways to main­tain opti­mal indoor air humid­i­ty is adi­a­bat­ic air humid­i­fi­ca­tion. Such sys­tems use adi­a­bat­ic con­ver­sion, mean­ing that the heat of vapor­iza­tion is tak­en direct­ly from the humid­i­fied air.

This is a very sim­ple yet extreme­ly effec­tive solu­tion. A spe­cial­ly designed pump com­press­es the water to a pres­sure of around 75 bar and high pres­sure noz­zles atom­ize it in the form of a water mist that evap­o­rates into the air.

High pressure nozzle

Since no addi­tion­al ener­gy is required for evap­o­ra­tion, the aver­age con­sump­tion is about 4 watts per liter of water, mak­ing the entire sys­tem very ener­gy effi­cient and cheap to run. Its advan­tage is also that the equip­ment does not need to be cleaned and main­tained fre­quent­ly — and spe­cial chem­i­cals are not used dur­ing such treat­ments. Effi­cient oper­a­tion of the sys­tem does not require the use of spe­cial flu­ids, as it is adapt­ed to work with tap water, pre­vi­ous­ly soft­ened or com­plete­ly dem­iner­al­ized.

Humid­i­fi­ca­tion and cool­ing in one

High pres­sure humid­i­fi­ca­tion is not the only way to take advan­tage of the adi­a­bat­ic effect.

Because the air changes adi­a­bat­i­cal­ly, it is also ide­al for cool­ing the return air. Then it is nec­es­sary to use a cross heat exchang­er or heat recov­ery rotors.

Adi­a­bat­ic cool­ing reduces the air tem­per­a­ture by sev­er­al degrees Cel­sius. Thus, it can suc­cess­ful­ly sup­port the exist­ing cool­ing sys­tem, pro­vid­ing addi­tion­al sav­ings, or even work inde­pen­dent­ly. In places where sum­mer tem­per­a­tures are not as high, an adi­a­bat­ic cool­ing sys­tem is often suf­fi­cient.

Things to remem­ber when installing an adi­a­bat­ic humid­i­fi­ca­tion sys­tem

In order for the high pres­sure humid­i­fi­ca­tion sys­tem to func­tion prop­er­ly, it must be prop­er­ly installed. This is obvi­ous, but also very impor­tant, because, as experts empha­size, the bet­ter the high pres­sure ele­ments are locat­ed, the more ben­e­fit can be obtained from the opti­mal oper­a­tion of the entire sys­tem.

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