Air Conditioning

Air Conditioning: – Data Centre, Disaster Recovery Centre & Communication Centre.

air conditioning image 1 TechNocRacy understands the effect air conditioning and air distribution has on the performance and availability of information technology (IT) equipment and IT services delivery. Computer rooms are a component of the overall data centre environment. Their purpose is to shelter the network and server infrastructure as well as their related cabling, otherwise known as the computer room’s critical load. Our experts can recommend the best computer room air conditioning (CRAC) configuration for your computer room. Our solutions provide increased cooling system availability, minimised operational costs, and protection from equipment downtime and/or damage, reduce energy cost and environmentally acceptable.

TechNocRacy has design and implement a variety of computer room air conditioning configurations to solve a variety of computer room heat load conditions. All of our configurations work to displace heat from the computer room. However, there are many factors that contribute toward selecting the most suitable configuration for any particular computer room. These include ceiling height, access floor depth, equipment layout, and heat load, just to name a few. Additionally, there are various air conditioner equipment types including portable units, ceiling-mounted units, and floor-mounted units, not to mention, precision air conditioners versus comfort-cool air conditioners. Further complicating the issue, heat rejection can be accomplished via self-contained systems or ‘split-systems’. Finally, cooling can be accomplished using any combination of technology; refrigerant-cooled, chilled water-cooled and free cooling methods. Each has its own advantages and disadvantages.

air conditioning image 2There are a variety of air-conditioning systems on the market that are specifically designed for computer room applications. They are known as precision air conditioners. They are considered precision because they control the computer room temperature to within one degree of its’ set point as well as the ambient humidity.

The most common computer room cooling system is a two-piece system, often referred to as a, ‘split–system’. It is composed of two sections. In an air-cooled system, it includes an evaporator section, where the cold air is supplied from, and a condenser section, where the heat is rejected from. This system is known as a DX (direct expansion) system due to its use of a compressor as part of the refrigeration cycle. Refrigerant lines connect the computer room refrigeration unit to the outdoor, air-cooled, condenser unit. Conversely, in a self-contained system, these components are combined into a single system, located inside the computer room. The exhaust air is rejected above the computer room ceiling or within the confines of the surrounding spaces.

In a chilled water system, the refrigeration process is relocated from a computer room air conditioner to a water chiller. The liquid is cooled to approximately 8-degrees Celsius and pumped to indoor air handlers. Warm air circulates over the chilled coils. The absorbed heat is transported to the chiller and rejected via the condenser water loop. This system is most commonly found in larger computer rooms due to its high installation cost.

air conditioning image 3Very often, extensive ductwork and/or raised floor delivery systems are required with any of these systems. Many design factors influence the type of air conditioning set-up a computer room requires.

TechNocRacy can help you choose the right cooling system for your needs.

Effective environmental control improves the overall function and reliability of a computer room. With TechNocRacy as part of the development process from planning through to implementation and maintenance, your computer room cooling system is guaranteed to run at peak efficiency.

In order to avoid expensive and unnecessary downtime, a computer room cooling system must have precise control over temperature, relative humidity, airflow, and airborne contaminants. Poor ambient conditions, such as prolonged operation at high temperatures and variations in humidity, take a toll on computer equipment. Rapid temperature swings can also have a negative effect on hardware operation. This is one of the reason’s hardware is left powered up, even when not processing data.

In addition to regulating temperature and humidity using the cooling system, it is important to ensure temperature control by:

  1. Installing moderate- to high-efficiency air filters to eliminate airborne dust,
  2. Creating an effective vapour barrier to protect against seasonal humidity changes,
  3. Balancing outside air intake to limit the latent load brought into the computer room,
  4. Installing adequate heat rejection equipment to effectively remove the heat load from the computer room,
  5. Utilise a hot aisle / cold aisle equipment layout strategy to provide efficient cooling,
  6. Minimise air mixing by using blanking plates within cabinets as well as brush-grommets in floor penetrations,
  7. Install raised floor cooling distribution to provide sufficient CFM and static pressure to cool the critical loads,
  8. Incorporating 100-percent redundancy of computer room cooling system capacity in case of failures,
  9. Sheltering cooling units within the computer room, on the roof, or in a secure location to restrict access.

air conditioning image 4Unlike comfort-cool air conditioning systems, precision air conditioners are specifically manufactured as computer room cooling systems to maintain the temperature, within one (1) degree, and the humidity of a computer room within a very narrow range. This provides the environmental stability required by sensitive electronic equipment. In general, a computer room should be maintained at a desire temperature and relative humidity at all times.

The design and construction of the computer room, including its cooling system, should meet the specific environmental needs of your equipment. For results that match your scope, schedule and budget, contact TechNocRacy today.

Please contact us and tell us about your project. Give us the opportunity and we’ll provide you with the justification you need, to convince your management to take the next step – for TechNocRacy to be your preferred service provider.