The function of the precision air conditioning unit is cooling and dehumidification. The control is performed by heating and humidification, and it is wanted that the refrigerator is in constant operation at a stable and continuous speed. Care needs to be taken to suppress modifications due to the surrounding environment.
Temperature and Humidity Design Conditions
The maintenance of the temperature level and humidity design conditions is crucial to the smooth operation of a technology room. Design conditions must be 72-75 ° F and 45-50% relative humidity (R.H.). As damaging as the wrong ambient conditions can be, rapid temperature level swings can likewise have an unfavourable effect on hardware operations. This is one of the reasons hardware is left powered up, even when not processing data. Precision air conditioning is developed to keep temperature level at ± 1 ° F and humidity at ± 3-5% R.H. 24 hours a day, 8760 hours a year.
On the other hand, comfort systems are developed to maintain 80 ° F and 50% R.H. only throughout summertime conditions of 95 ° F.
and 48% R.H. outside conditions. There is generally no dedicated humidity control, and the basic controllers can not preserve the setpoint tolerance required for temperature level, allowing potentially harmful temperature and humidity swings to happen.
Issues Caused by the Wrong Environment
A badly preserved technology room environment will have a negative impact on data processing operations. The outcomes can range from data corruption (mumbo jumbo) to total system shutdowns and failures.
1- High & Low Temperature.
A high or low ambient temperature or rapid temperature level swings can corrupt data processing and shut down the whole system. Temperature variations can modify the electrical and physical characteristics of electronic chips and other board elements, causing malfunctioning operation or failure. These problems might be transient or may last for days. Even short-term issues can be very hard to diagnose and repair.
2 – High Humidity
High humidity can result in tape and surface deterioration, head crashes, condensation, corrosion, paper dealing with issues, and gold and silver migration resulting in component and board failure.
3 – Low Humidity
Low humidity considerably increases the possibility of fixed electrical discharges. Such static discharges can corrupt data and damage the hardware.
Differences Between Precision Air and Comfort Air Conditioning.
1- Sensible Heat Ratio
A heat load has 2 different components: sensible heat and latent heat. Reasonable heat is the boost or reduction in air-dry bulb temperature level. Latent heat is the boost or decrease in the moisture content of the air.
The total cooling capacity of an ac system is the amount of the practical heat removed, and the latent heat is eliminated.
Total Cooling Capacity = Sensible Cooling + Latent Cooling.
The Sensible Heat Ratio is the percentage of the overall cooling that is sensible.
Sensible Heat Ratio (SHR) = Sensible Cooling / Total Cooling.
In a technology room, the cooling load is comprised practically completely of sensible heat originating from I.T hardware, lights, assistance equipment, and motors. There is really little latent load since there are few people, limited outdoors air, and generally a vapour barrier. The required SHR of an air conditioning unit to match this heat load profile is very high, 0.95-0.99. Precision cooling is created to meet these very high reasonable heat ratios.
On the other hand, a comfort ac system typically has an SHR of 0.65-0.70 and provides too little practical cooling and excessive latent cooling. The excess latent cooling indicates that excessive moisture is constantly being eliminated from the air, and an energy-expensive humidifier is needed to replace wetness.
2- Precise Temperature and Humidity
Precision a/c units have the sophisticated, fast-acting, microprocessor-based controls necessary to respond quickly to altering conditions and maintain the tight tolerances required for a stable environment. Precision air systems typically consist of numerous stages of cooling and heating, a humidifier, and a dedicated dehumidification cycle, permitting them to satisfy any temperature and humidity control requirements.
Convenience air conditioning unit normally has fundamental, restricted controls unable to react quickly enough to keep the needed tolerance. Comfort systems do not normally include heat or the humidification/dehumidification cycles required for a steady technological environment. The elements, if offered, are regularly “add ons” and not part of an integrated system.
3 – Air Quality
Accuracy, a/c unit, operate at a high CFM, 600-1000 CFM/ton. This high CFM moves more air through the area, enhancing air distribution and reducing the opportunity of localized locations. It also enables more air to move through filters, guaranteeing a cleaner environment. Accuracy a/c unit usually use a moderate- to high-efficiency filter bank, deep-pleated, to minimize airborne particles. Comfort a/c unit run at a much lower CFM, 300-400 CFM/ton. Low CRMs can lead to bad air circulation and more airborne pollutants. Filters for comfort a/c are typically flat, low-efficiency media that do not remove a sufficient percentage of airborne particles.
4 – Hours of Operation
A precision ac system is designed and developed to run non-stop 8760 hours a year. The systems are created – with components picked and redundancy bundled – to ensure zero downtime. System controls preserve space conditions for the full series of outside ambient conditions, summer season or winter.
Convenience a/c are developed to run during summer season days, approximately an expected optimum of 1200 hours annually. The system is not developed or expected to operate non-stop, year-round. Neither the controls nor the refrigeration system is developed for zero downtime or winter operation.
Why Do I Need Precision Air Conditioning?
Since information processing is the lifeblood of all important operations, dependability in your innovation room is essential
to your company’s health. I.T. hardware produces an unusual, concentrated heat load, and at the same time, is conscious changes in temperature or humidity.
A temperature level and/or humidity swing can produce issues ranging from processed “gibberish” to a total system shutdown. This can produce high costs for the company, depending upon the length of the disruption and the value of time and information lost.
Standard comfort cooling is not designed to manage the heat load concentration and heat load profile of technology spaces, nor is it designed to offer the accurate temperature and humidity set point needed for these applications.
Accuracy air systems are created for close temperature and humidity control. They offer high dependability for year-round operation, with the ease of service, system flexibility and redundancy needed to keep the innovation space up and running 24 hours a day.