Chiller is a cli­mate con­trol unit that is focused on indus­tri­al appli­ca­tions. High pow­er equip­ment is used to cool liq­uids or main­tain a set tem­per­a­ture in large rooms.

Where are chillers used?

The func­tion­al fea­tures of the chillers deter­mined the scope of their appli­ca­tion:

  • Indus­tri­al pro­duc­tion and work­shops that need seri­ous cool­ing to work;
  • Phar­ma­ceu­ti­cal, med­ical and relat­ed fields where a cer­tain tem­per­a­ture of equip­ment and goods is need­ed;
  • Pro­duc­tion of food and drinks that require refrig­er­a­tion accord­ing to tech­nol­o­gy;
  • Main­tain­ing low tem­per­a­tures on skat­ing rinks and ice sports grounds.

Thanks to the unit’s per­for­mance, which reach­es 9 MW, one out­door unit is enough to pro­vide a com­fort­able micro­cli­mate in a small office build­ing or a pri­vate house. When used for indus­tri­al pur­pos­es, sev­er­al sep­a­rate devices will be need­ed.

What is the working principle of the chiller?

The oper­a­tion of the equip­ment is based on phys­i­cal prin­ci­ples sim­i­lar to the func­tion­ing of stan­dard split sys­tems: ener­gy con­sump­tion for heat exchange.

Chillers, unlike home air con­di­tion­ers, use water, a solu­tion of eth­yl­ene gly­col, cal­ci­um chlo­ride or sodi­um instead of fre­on.

First, the refrig­er­ant is com­pressed and the evap­o­ra­tion process begins. The mix­ture of the remain­ing liq­uid and vapor moves to the con­denser, which directs the gen­er­at­ed heat out­ward, cool­ing the com­pound and con­vert­ing it back into a liq­uid state.

At the next stage, the refrig­er­ant enters the low pres­sure cham­ber, where it again pass­es into a gaseous state. For this process, the ther­mal ener­gy con­tained in the refrig­er­ant is used. Dur­ing boil­ing, heat is tak­en away by the evap­o­ra­tor, and the liq­uid is cooled.

What is a water chiller?

Stan­dard cli­mate sys­tems use air to remove excess heat from the con­densers, but a num­ber of chillers are water-cooled. Such devices have the fol­low­ing char­ac­ter­is­tics:

  • A num­ber of design dif­fer­ences, the main among which is the design of the heat exchang­er;
  • Con­sume less refrig­er­ant due to reduced inter­nal vol­ume;
  • Improved heat trans­fer effi­cien­cy com­pared to air-cooled mod­els;
  • Small­er dimen­sions allow them to be placed indoors.

Despite the advan­tages, it is impos­si­ble to com­plete­ly aban­don the air heat removal sys­tem. Water sys­tems require the instal­la­tion of addi­tion­al fil­ter­ing equip­ment and cool­ing ele­ments, which increas­es the ini­tial cost of the instal­la­tion.

What is a non-condensing chiller?

The design of the devices in this group allows you to use the space with greater ben­e­fit. The con­denser in them is a sep­a­rate unit, which is tak­en out sep­a­rate­ly from the body of the main equip­ment. This allows you to install it out­side the build­ing and use the ambi­ent air for cool­ing. There are two mod­i­fi­ca­tions of non-con­dens­ing chillers: with an inte­grat­ed ven­ti­la­tion sys­tem and based on water cir­cu­la­tion.

The first option is equipped with an axi­al fan that pumps air that low­ers the tem­per­a­ture. Mod­els of this type are char­ac­ter­ized by rel­a­tive­ly low cost and the pos­si­bil­i­ty of instal­la­tion in open areas or in tech­ni­cal rooms. A remote con­denser reduces the load on the roof or allows the use of chillers in con­di­tions where it is impos­si­ble to install on the roof of a build­ing.

For water-cooled chillers, third-par­ty run­ning water sources are used. Devices are inde­pen­dent of envi­ron­men­tal con­di­tions or sea­son. The gen­er­at­ed heat can be used for space heat­ing. The dis­ad­van­tage is the high cost and demand­ing qual­i­ty and fre­quen­cy of main­te­nance.

What is a freecooling chiller?

Free cool­ing (Eng­lish nat­ur­al cool­ing) — air con­di­tion­ing sys­tems that use the ambi­ent tem­per­a­ture. The design pro­vides for the replace­ment of the evap­o­ra­tor with a drycool­er, which com­bines nat­ur­al cool­ing with the oper­a­tion of axi­al fans, and the instal­la­tion of an addi­tion­al cool­ing cir­cuit, where an antifreeze liq­uid cir­cu­lates.

Equip­ment of this type is the best option for cold cli­mate con­di­tions. It reduces ener­gy con­sump­tion by 50–80%. Elec­tric­i­ty is required only to main­tain the func­tions of the fans. Installing a fre­quen­cy con­vert­er allows you to adjust the speed of rota­tion of the blades accord­ing to the need to reduce the tem­per­a­ture.

If you still have ques­tions, please con­tact us. Our experts will help you choose the best equip­ment for your needs.

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