Critical cooling load refers to the load in a server room or datacentre environment of the usable cooling capacity. The critical cooling load does not include equipment in support areas outside the datacentre or server room floor.
In Row Cooling Units
In row cooling units provide targetted cool to nearby server cabinets in a datacentre environment. An in-row precision cooling system can be installed as a floor mounted or overhead suspended system and ensures faster load heat dissipation as neither the cool or hot air have far to return to the cooling system. In-row precision cooling systems are scalable and improve cooling and in return energy efficiency within a datacentre.
Efficiency and Capacity Gains From In-row Cooling Systems
Using in-row air conditioners provides both efficiency and capacity gains. The close proximity to the load provides a smaller distance for cool and warm air to flow, making in-row units suitable for hot-aisle/cold-aisle containment. In-row units are modular in format allowing a scalable architecture that can be scaled to suit growth of the server room or datacentre aisles.
The Server Room Environments team work with a number of leading cooling system manufacturers and can supply in-row air conditioner for use with chilled water or a refrigerant and will require connection to chilled water supply or remote condenser. Our team of cooling experts provide a free site survey, design, installation and maintenance service.
What is In-Row Cooling?
In-row cooling systems are a type of air conditioner and placed between server cabinets or at the end of a row of server racks where they provide local and precision cooling to protect the critical IT servers. In-row cooling units typically occupy a half-rack of space and generally require no additional side clearance space.
In-row cooling technology makes use of the hot-aisle/cold-aisle cooling technique. The units draw warm/hot exhaust air directly from the hot-aisle and distributes cool air into the cold-aisle. This is a form of precision air conditioning as the critical IT servers’ inlet temperatures are steady and a ‘closed coupled cooling’ technique which improves energy efficiency (lowers fan speed and usage) and prevents hot and cold air return paths from mixing.
An in-row cooling unit consists of fans and a coiling coil which will use chilled air/water/glycol or a pumped refrigerant as a cooling medium. The units may require remote connection outside the datacentre environment to a condenser (refrigerant) or chiller (liquid) system. Typical cooling system sizes range up to 70kW or more.
Types of In-Row Installation
The units can be installed on a raised access floor, onto a solid floor or suspended via overhead fixings:
- Floor Mounted: between server cabinets or at the end of a row of cabinets and may use the under floor plenum of a raised access floor to provide cool air to the server cabinets.
- Overhead Mounted or Suspended: these units can be installed on top of server cabinets or suspended from an overhead from to release floor space within a datacentre.
In-row cooling units provide an alternative to direct expansion of a computer room cooling system when high density server racks are installed that require localised and precision cooling.
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