Everyone who has learned refrigeration knows that the principle of refrigeration is so simple. There are just a few forms of constant temperature and humidity precision air conditioning in the computer room . The refrigeration industry has basically not experienced excessive technological changes in recent years. According to the current development of the industry, the precision air conditioners in the computer room mainly have the following categories:
1. Water-cooled machine room precision air conditioner (water-cooled)
The structure of the water-cooled machine room precision air conditioner is not much different from the air-cooled type. The main difference is that the water-cooled machine 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 The heat is released from the heater, and the cold water of 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 heat is discharged into the air by the cooling tower. Since the cooling tower is a heat and moisture type exchange equipment (the air and water are in direct contact), some dry-cooled outdoor condensers are also used.
2. Constant-temperature and constant-humidity precision air conditioner for chilled water machine room (chilled water type)
The indoor unit of the constant temperature and humidity precision air conditioner of the chilled water machine room is mainly composed of a chilled water coil, a fan, and a water valve. The chilled water directly enters the indoor unit coil. It is simply understood that there is no compressor in the air conditioning terminal refrigeration system. At the same time, the individual unit cooling capacity 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 outlet and return air conditions in the system. Under the different operating conditions of the same unit, the unit cooling capacity may differ by several times.
3. Air-cooled precision air conditioner (air-cooled)
That is, the refrigerant of the air conditioner is cooled by the wind, and a condenser (precision air conditioner outdoor unit) installed outdoors takes away the heat of the condensate and causes the refrigerant to release heat. This is the most common, so I will not talk much about it.
4. Precision air conditioning in glycol cold machine room (glycol cooling)
This type of machine is mainly used in the cold area in the north, and it 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.
Fifth, precision air conditioning in heat pipe machine room (heat pipe air conditioner)
The precision air conditioner of the heat pipe machine room belongs to a very large air conditioning system. It has many names according to different terminal forms and different refrigeration media of the unit, such as gravity back panel, cold water back panel, ceiling type heat pipe air conditioner, heat pipe row, etc ...
Six, dual cold source type machine room constant temperature and humidity precision air conditioner (dual cold source type)
The dual cold source system is to ensure the cooling reliability of the constant temperature and humidity precision air conditioner in the computer room. The dual cold source machine room precision air conditioner can be used. There are generally the following 2 combinations:
1. Air cooling + chilled water, the chilled water system is mainly used, and the air cooled system is reserved.
2. Water cooling + chilled water is mainly used for chilled water system, and water cooling system is reserved.
Computer room precision air conditioning , computer room precision power distribution cabinet , computer room micro-module
