There are two options for installing a containerization system in an already operating machine room (I will discuss the installation of isolation systems in building machines in the next part). In the first case, isolate the cold, and in the second - the hot corridor. Each of the options has its own characteristics, pros and cons.


Cold Aisle Isolation


Operating principle: Perforated plates installed in front of the front cabinet door are used to supply a cold air stream to the corridor. Hot air "spills" into the total volume of the room.


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Installation of racks: to isolate the cold corridor, cupboard air conditioners are located around the perimeter of the room and blow a cold stream of air under the raised floor. In this case, the enclosures are in a row facing each other.


Pros:


  • relatively low cost,
  • ease of scaling: the cabinet air conditioner can be installed in any free space around the perimeter of the hall.

Cons:


  • complexity of scaling: within several corridors, problems may arise with the uniformity of air supply in different rows,
  • in the case of highly loaded equipment, it is difficult to increase the local flow of cold flow, because for this you need to install additional perforated raised floor plates,
  • not the most comfortable working conditions of the staff due to the fact that the whole room is in a hot zone.

Design Features:


  • you need an additional reserve in height for installing a raised floor and additional space for installing a ramp at the entrance,
  • since the container is insulated along the inner perimeter of the corridor, in the racks, insulation of the front front and a cap-base for the rack in front are required.

To suit: small server rooms, or to halls with a low load (up to 5 kW per rack).


Hot corridor


Principle of operation: in case of isolation of a hot corridor, inter-row air conditioners are used to blow cold flow into the total volume of the room.


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Installation of racks: cabinets are installed in rows, with the back to each other. At the same time, air conditioners are installed in a row with the cabinets in order to minimize the length of the air flow and thereby increase the performance of the refrigeration system. Hot air is discharged into a closed container and then flows back to the air conditioner.


Pros:


  • a reliable, productive solution that can be used with highly loaded racks, as well as in rooms with a low ceiling, since it does not require a raised floor or an upper plenum,
  • easy scalability due to the fact that each corridor is independent,
  • comfortable staff indoors.

Cons:


  • price: in this option, more air conditioners are needed, while each container needs its own backup air conditioning,
  • inter-row air conditioners take up space that could be used for server cabinets,
  • scaling difficulties: adding air conditioners is possible only if additional connection points are provided in advance.

Design Features:


  • the room does not require additional headroom,
  • the container itself is isolated along the outer perimeter of the corridor,
  • insulation of the front front and the base/plinth, as well as insulation of all roofs of the cabinets are necessary in the cabinets,
  • for end cabinets of the corridor, isolation of the sides of the cabinet and the basement on the outer perimeter is needed.

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Suitable for: small and medium server rooms with high load (up to 10 kW per rack).


Special case: containerization systems for cabinets with a closed cooling circuit.


Principle of operation: air conditioners are installed next to or inside cabinets, forming single closed hot and cold zones.In this case, air exchange occurs inside the cabinet (or a small group of cabinets).


Pros:


  • a high-performance solution that is used with loaded racks or in a room not designed to accommodate IT equipment (the container also acts as a protective shell for IT equipment),
  • can be used in rooms with a low ceiling.

Cons:


  • the high cost of the solution eliminates the possibility of mass placement of cabinets,
  • limited scalability: separate air conditioning is required for each set,
  • complication of the fire extinguishing system: each closed cabinet turns into a separate compartment, requiring its own set of monitoring sensors and a local fire extinguishing system.

Design Features:


  • the room does not require additional headroom,
  • cabinet design provides for a completely enclosed circuit, including with the possibility of protection over IP.

Suitable for: those who need to place highly loaded computing systems (up to 20 kW per rack).

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