In response to this situation, after continuous exploration and research by the technicians in the hydropower industry, it was discovered that the simplest and most effective way to solve the problems of dampness and condensation is to use a dehumidifier. The dehumidifier is currently the most professional type of moisture-proof and dehumidification equipment, which can quickly extract the excess moisture from the air and control the moisture content in the air within an ideal range. At the same time, it can conduct indirect dehumidification for various items or equipment. The damp underground space not only affects the service life of electrical and mechanical equipment, but also has adverse effects on the health of the staff. Some large hydropower generating units have water turbine generator shaft surfaces that are prone to water droplets during operation. These water droplets will enter the water guide bearings through the oil basin cover, posing potential risks to the safe operation of the generating units. The pipeline and electrical equipment in the large water pump pump room are numerous, and when condensation occurs on the surfaces of the pipelines and electrical equipment, after forming water droplets, it significantly accelerates the damage rate of the sealing materials, metal components, and electrical components of the pumps, posing safety hazards to the stable operation of the pumps.

The internal environment of the communication room has extremely strict requirements for temperature and humidity. The optimal humidity level should be maintained within the range of 40% to 60%. If the humidity is too high, the components will be affected and eventually cause a short circuit; if the humidity is too low, static interference will occur in the mechanical friction parts, damaging the components and affecting the normal operation of the equipment. The environmental humidity in the communication room needs to be controlled by a dedicated dehumidifier. When selecting the dehumidifier equipment, professional calculations based on its working conditions should be carried out for selection. The dehumidification of the communication room varies in selection due to different usage environments, room area, environmental temperature, and ventilation conditions. Generally, it is configured at a rate of 1KG of dehumidification per 60-120 cubic meters of space, which can basically meet the humidity requirements of about 60%. If the power distribution room has a more complex working condition, it must be strictly calculated to achieve the best effect.