Precision AC

[iiternalfire]

What exactly is precision AC technology?
How different is it from conventional window ACs?
Where is it required?

[Brian_UK]

I suppose that is what we would call "Close Control" systems.

To provide close-control air conditioning you have to control both temperature and humidity levels.

To accomplish this you often have to cool the air to reduce the humidity, then re-heat it so that the temperature is comfortable, then put more water vapour into the air to return the humidity back to acceptable levels.

[sourabhs]

Precision cooling is all about sensible cooling. it provides about 95% sensible cooling. it is manily used for electronic cooling such as datacenter, telecom units,etc

[sourabhs]

how can we calculate total cooling capacity & sensible cooling capacity of the unit. Is there any formula for calculating this?

[Volander]

It depends of size of the unit, coil temperature, room temperature and relative humidity in the room. For standard conditions % hum(50% or 40%) and room temp (Db 24C) you may find in technical manual of any manufacturer of close control systems.

[Kaka]

normally close control units use EXV or TXV?

[stevewood]

normally CRAC's use TXV's
EXV's are available as an option for most manufacturers

[dedi sunardi]

hi everybody, precisian ac is provide for utility cooling not for human comfort, its maintain temperatur and humidity so precisian.depend on setting utility.

[tom.smart71]

Precision air-conditioning systems regulate temperature and humidity for sensitive technology.
Its continuous operation reliably ensures the high availability of computer systems.