Analysis of Paper Evaporative Cooling Pads

I. Core Advantages

Cooling Efficiency: Evaporative cooling pads achieve cooling through the absorption of heat through water evaporation. When air flows over the moistened paper pad surface, the water evaporates and removes heat, significantly lowering the air temperature. With appropriate design (e.g., a pad thickness of 100-150mm and an air speed of 1-2m/s), cooling efficiencies can reach 70%-90%, with ventilation resistance as low as 10-60Pa, achieving both high efficiency and energy savings.

Applications: Widely used in agricultural buildings such as livestock and poultry houses and greenhouses, they are particularly effective in dry or low-humidity areas.

Corrugated Honeycomb Structure: The interlaced corrugated design increases the heat and mass exchange surface area while maintaining low ventilation resistance, ensuring uniform air flow and sufficient contact with moisture.

Uniform Water Distribution: The top plastic pipe or water trough is uniformly distributed with small holes for uniform spraying from top to bottom, preventing dry spots or water accumulation.

II. Performance Limitations

Lifespan Limitation: Paper is susceptible to environmental influences and can shrink, deform, or break after long-term use. The typical lifespan is 1-3 years.

Dirt Accumulation: Dust in the air and salts in the water easily deposit on the surface of the paper pad, reducing water absorption and increasing ventilation resistance. Regular cleaning or replacement is required.

Scale Risk: Minerals in hard water easily form scale on the surface of the paper pad, clogging pores and affecting cooling efficiency. Softened water treatment or regular acid cleaning is required.

Maintenance Frequency: The circulating water tank, spray lines, and paper pad surface require regular cleaning to prevent the growth of biological fouling (such as sphagnum moss).

Humidity Dependence: Reduced effectiveness in high humidity environments: When air humidity approaches saturation, the evaporation rate decreases, significantly reducing the cooling effect. Therefore, in humid areas, other cooling methods (such as mechanical refrigeration) may be necessary.