Reference of several dehumidification methods commonly used in underground engineering

The underground is different from other environments, and its humidity is usually very high, so the use of the underground space must be effectively dehumidified first, so the industrial dehumidifier has become an indispensable part. What kind of dehumidification method should be used for special occasions such as underground?
At present, the dehumidification methods commonly used in underground engineering include heating and ventilation dehumidification, cooling and dehumidification, compression dehumidification and hygroscopic dehumidification. Among them, the heating, ventilation and dehumidification method is to use the ventilation method to input the air on the ground into the underground project, and then discharge the moisture absorbed by the air. This method is relatively simple.
The law of cooling and dehumidification is to use the cooling and dehumidification equipment at the temperature of the ground, so that a part of the water will condense on the surface of the equipment and be discharged, and the air coming out is relatively dry, which is enough to meet the requirements of underground engineering . Since the air is compressed, the temperature will rise, so the purpose of dehumidification of underground works can also be achieved by taking advantage of this.