Chilled water air-con programs are generally utilized in functions that want giant cooling capability comparable to hypermarket, industrial course of and industrial air-con comparable to places of work and factories.
Increasingly properties are utilizing this method to air conditioned their complete home due to its cost-effectiveness and no hazard of getting refrigerant piped all around the home.
As its title recommend, this method makes use of water as its secondary refrigerant. Chiller is used to take away warmth from the water which is then circulated by way of different elements to soak up warmth from the area.
Water is non-corrosive, has particular warmth worth, fluid, non-toxic and is reasonable. This makes it a wonderful selection in comparison with different secondary refrigerants comparable to sodium chloride brines, propylene glycols, ethylene, methanol or glycerin.
How Chilled Water Air Conditioning Works
Chiller
The chiller is the part of the system the place an change of warmth occurred between the water that goes to the constructing and the evaporator. The water leaves the chilled water evaporator at 45°F or 7°C. This chilled-water is then circulated by way of your entire constructing by means of a pump.
In compression chiller, compressors are used to compress the refrigerant vapor within the condenser the place it turns into liquid. In water-cooled condenser, the warmth of the refrigerant liquid is rejected to the water utilizing the shell and tube, shell and coil or double tube warmth exchanger.
The heated water is then piped to the cooling tower the place it’s cooled by rejecting the warmth to the ambiance. The cooling tower is normally situated on prime of the constructing.
Cooling Tower
In most chiller functions, a water-cooled condenser makes use of a cooling tower to scale back the temperature of the condenser. On this case, the water loop system is separated from the chilled water that goes to the constructing. The water that has been cooled by the evaporated water on the cooling tower will enter the condenser at 85°F or 29°C. It picks up the warmth from the condenser and leaves at 95°F or 35°C, a rise of 10°F or 6°C.
The water is then despatched to the cooling tower by means of a pump to be cooled by evaporation of the water within the cooling tower. The cooled water temperature now drops to 85°F or 29°C and enters the condenser once more. This course of is repeated. Water is consistently added to the cooling tower by means of water piping to interchange people who has been evaporated into the air.
Fan Coil Models
The chilled water is piped into fan coil items which encompass fins & followers with giant floor space that absorbed warmth from the area by way of the air-heat change course of. Every fan coil unit has its personal thermostat that regulate the quantity of cooling wanted.
The chilled water received heated up and returns to the chiller at about 55°F or 13°C. The water temperature would has been heated up by 10°F or 6°C after cooling the area.
The water is then pumped again to the chiller evaporator the place it’s cooled again to 45°F earlier than being circulated again to all of the fan coil items. This course of is repeated.
See Additionally
Cooling Tower
See in better particulars the operation and rules of a cooling tower.
Again To Chilled Water Air Conditioning Dwelling Web page
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