What Types of Precision Air Conditioners in Computer Rooms?

The refrigeration forms of precision air conditioning in computer rooms can be simplified into: air-cooled type, chilled water type, heat pipe type, indirect natural cooling type, and others are mostly used in combination with the above types.

Precision Air Conditioners

So, what are the main types of precision air conditioners in computer rooms?

1. Air-cooled computer room precision air conditioner (air-cooled type)
That is, the refrigerant of the air conditioner passes through the wind to cool the condenser installed outdoors (precision
The air conditioner outdoor unit) takes away the heat of the refrigerant, causing the refrigerant to release heat. this
This is the most common device.

Air-cooled computer room precision air conditioner

2. Water-cooled computer room precision air conditioner (water-cooled type)
The structure of the water-cooled computer room precision air conditioner is not much different from the air-cooled type. The main difference is that the water-cooled computer room precision air conditioner has a water-cooled plate or shell and tube heat exchanger. The refrigerant passes through the water-cooled plate or shell and tube heat exchanger. When the heat is released, the cold water in the water-cooled plate or shell-and-tube heat exchanger absorbs the heat and is discharged to the cooling tower of the building through the water pump, and then the cooling tower discharges the heat into the air. Since the cooling tower is a heat and moisture exchange device (air and water are in direct contact), dry-cooling outdoor condensers are also used.

Water-cooled computer room precision air conditioner

3. Chilled water type machine room precision air conditioner (chilled water type)
The indoor unit of the chilled water type precision air conditioner in the computer room is mainly composed of a chilled water coil, a fan, and a water valve. The chilled water directly enters the indoor unit coil. Simple understanding: the terminal refrigeration system of the air conditioner does not have a compressor. At the same time, the cooling capacity of the single unit at the end of this type of air conditioning system is not fixed and is closely related to the inlet and return water temperature and return air conditions in the system. The cooling capacity of the same unit may vary several times under different working conditions.

Chilled water type machine room precision air conditioner

4. Double cooling source type computer room precision air conditioner (dual cooling source type)
The dual cooling source system is to ensure the reliability of precision air conditioning in the computer room. Double cooling source precision air conditioning in the computer room can be used. There are generally 2 combinations:
a. Air cooling + chilled water, with the chilled water system as the main use and the air cooling system as backup.
b. Water cooling + chilled water, with the chilled water system as the main use and the water cooling system as backup.

Double cooling source type computer room precision air conditioner

5. Ethylene glycol cooling machine room precision air conditioning (ethylene glycol cooling refrigeration)
This type of machine is mainly used in cold northern areas and can also be regarded as a water-cooled machine room precision air conditioner. Once the outdoor temperature is below 0 degrees Celsius, add ethylene glycol solution to the water (to ensure that the water does not freeze) to ensure that the cooling water does not freeze.

Ethylene glycol cooling machine room precision air conditioning

6. Chilled water double coil type computer room air conditioner (double coil)
This type of refrigeration method has two independent sets of chilled water coils in a chilled water unit, and they are connected to different chilled water sources, which improves the safety of the system and saves the unit’s floor space in the same structure. A 2N design is formed within the system.

Chilled water double coil type computer room air conditioner

7. Heat pipe type computer room precision air conditioner (heat pipe air conditioner)
Heat pipe type computer room precision air conditioning is a very large air conditioning system. It has many names depending on the terminal form and the cooling medium of the unit, such as gravity back plate, cold water back plate, ceiling type heat pipe air conditioner, heat pipe row room, etc.…

Heat pipe type computer room precision air conditioner

8. Various other direct natural cooling or indirect natural cooling type computer room precision air conditioners (natural cooling) that utilize natural cooling
There are many such devices, and they are basically customized refrigeration system solutions, such as Tencent’s t.block, Amazon’s indirect evaporative natural cooling system solution used globally, etc.

Various other direct natural cooling

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