Heat humidity independently controlled air conditioning system applied to IDC machine room and refrigeration method

Abstract

The present invention provides a heat humidity independently controlled air conditioning system applied to IDC machine room and a refrigeration method. The air conditioning system comprises a closed type cooling tower, a water-cooling refrigeration unit, a cold water tank, a refrigerated water pump, a cold water pump, a dry coil module, a fresh air dehumidification module, an exhaust device, an embedded control system, a closed cooling tower inlet air wet-and-dry-bulb temperature sensor, a dry coil module inlet water temperature sensor, and a dry coil module outlet water temperature sensor. The refrigeration method is as follow: when the dry bulb temperature of the outdoor air is lower than the criterion temperature 1, the closed type cooling tower operates in the dry conditions, the water-cooling refrigeration unit stops, and thus water and energy are saved; when the dry bulb temperature of the outdoor air is higher than the criterion temperature 1 and the wet bulb temperature is lower than the criterion temperature 2, the closed type cooling tower operates in the wet condition, the water-cooling refrigeration unit stops, and thus energy is saved; and when the wet bulb temperature of the outdoor air is higher than the criterion temperature 2, the water-cooling refrigeration unit operates and during the operation process the outlet water temperature is the criterion temperature 2, and thus energy is saved.

Description

technical field [0001] The invention relates to the field of air conditioning in IDC equipment rooms, in particular to an air conditioning system and a refrigeration method for independently controlling heat and humidity applied to IDC equipment rooms. Background technique [0002] In the IDC equipment room, due to the operation of the equipment, the heat dissipation is large. To ensure the normal operation of the equipment, the temperature of the equipment room needs to be controlled at 22°C ± 2°C all year round. [0003] The particularity of the IDC computer room: (1) It is a cooling load throughout the year, so the cooling system needs to be turned on throughout the year and run 24 hours a day; (2) The cooling load of the IDC computer room is large, and the energy consumption of the refrigeration system is very high; ( 3) In order to ensure the normal operation of the IDC room in the case of water cut-off, a water storage tank is required when the water-cooled refrigerati...

AI Technical Summary

Problems solved by technology

[0005] The main disadvantages of air-cooled precision air conditioners are as follows: (1) The energy efficiency ratio of the refrigeration system is low: the energy efficiency of the air-cooled system is lower than that of the water-cooled refrigeration system, and the energy consumption is large for the whole year; (2) Difficult to install: a large number of outdoor condensers need to be installed In a very large site, the copper pipe is too long, the cooling efficiency is low, the cost is high, the installation is difficult, and it affects the appearance of the building

(3) The installation position of the outdoor condenser is limited by space, and the heat island effect is likely to occur, which greatly reduces the cooling efficiency

(4) When the outdoor temperature is high in summer, the cooling capacity is seriously reduced or even shut down for protection

(5) The working temperature of the fan coil inside the precision air conditioner is much lower than the dew point temperature, which produces a large amount of condensed water. In order to maintain the humidity of the data center, the humidification function needs to be activated, and both dehumidification and humidification consume a lot of energy

(3) When using an open cooling tower, the volume of the storage tank that needs to be equipped is large, the floor area is large, and the water consumption is large

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