Within the data center rooms—the digital heart of modern society—the stable operation of every server and cable determines 

the smooth flow of information. Among the myriad precise environmental control parameters, humidity—this seemingly benign 

physical quantity—actually plays a critical role. It functions like a silent guardian, and the wet membrane humidifier is the efficient, 

reliable tool in this guardian's hands, building an invisible barrier for data security and stable equipment operation.

Data center facilities impose extremely stringent humidity requirements, primarily to prevent static electricity and ensure equipment 

stability. Excessively dry environments readily generate intense static charges. These sudden discharges can cause minor issues like 

degraded electronic component performance and signal transmission errors, leading to elusive soft faults. More severely, they can 

directly damage delicate integrated circuit chips, resulting in permanent hardware failure. Simultaneously, persistent static adsorption 

accelerates dust accumulation within equipment, impairing heat dissipation efficiency. Conversely, excessively high humidity leads to 

condensation, posing risks such as equipment short circuits and corrosion of metal components. Therefore, maintaining humidity 

precisely within the optimal range of 40%-60% RH is a mandatory requirement for data center environmental control. The wet 

membrane humidifier is one of the key devices achieving this objective.

The core principle of wet-membrane humidifiers, also known as water-dripping humidifiers, lies in “isenthalpic humidification.” 

Dry air is forced by a fan through a specialized membrane uniformly saturated with water. Across this vast contact surface, moisture 

evaporates into the air, absorbing latent heat of vaporization. This process increases air humidity while slightly lowering air temperature 

without requiring additional heat sources, resulting in high energy efficiency. Compared to electrode/electric-heating humidifiers, it 

produces no white mineral dust during operation, preventing contamination of precision circuit boards. Its simple structure facilitates 

easy maintenance and operates with lower noise levels, making it particularly suitable for server room environments demanding high 

cleanliness and continuous operation.

In practical applications, scientifically selecting a wet membrane humidifier for a specific server room requires comprehensive quantitative 

calculations rather than simple area-based estimates. The core task is determining the required humidification capacity, which necessitates 

careful consideration of several key parameters:

Server Room Sealing and Air Exchange Rate: Fresh air intake is one of the primary pathways for moisture loss within the server room. 

Calculate moisture loss per unit time due to permeation and forced ventilation based on the facility's structural sealing grade and 

designed ventilation rate.

Equipment Heat Load: IT equipment like servers and switches generate significant heat. To maintain constant temperature and humidity, 

the air conditioning system continuously supplies large volumes of dry, cool air to counteract this heat. This cool air acts like a sponge, 

absorbing moisture from the facility and carrying it away. Higher total equipment heat output typically requires greater air conditioning 

airflow, resulting in increased latent moisture removal load.

Enthalpy Difference Between Initial and Target Conditions: Ultimately, the required humidification depends on the total water vapor needed 

to process the incoming air (including return and fresh air) from its current state to the target humidity condition.

Consider a typical case: a 200-square-meter data center with total equipment power consumption of 100kW. Professional calculations, 

factoring in its twice-per-hour air exchange rate and significant air-cooling dehumidification effects from equipment heat dissipation, 

may ultimately require a wet-membrane humidifier with a capacity of no less than 15kg/hour. Multiple units should be strategically 

deployed to ensure uniform and stable humidity across all areas of the room.

In terms of energy-efficient operation, wet-membrane humidifiers also demonstrate significant potential. First, their “evaporative cooling” 

effect can share part of the precision air conditioning's cooling load during transitional seasons or specific operating conditions, reducing 

compressor start-stop frequency. Second, implementing humidity zone control strategies—setting differentiated humidity targets based 

on equipment thermal density and criticality across different server room zones—prevents “over-humidification.” Furthermore, deep 

integration of the humidification system with Building Management Systems (BMS) or Data Center Infrastructure Management (DCIM) 

enables intelligent start/stop and power regulation based on real-time load forecasting. This further unlocks energy-saving potential, 

lowering the overall Power Usage Effectiveness (PUE) value of the data center.

In summary, within the precision-engineered world of data centers—a realm defined by 0s and 1s—wet membrane humidifiers excel as 

“humidity guardians” through their efficiency, cleanliness, and energy-saving properties. Through scientific selection calculations and 

intelligent energy-saving solutions, they not only effectively eliminate static electricity threats and ensure high availability of IT equipment 

but also make significant contributions to the green, low-carbon operation of data centers. They are an indispensable component in building 

modern, highly reliable digital infrastructure.