High-Efficiency Evaporative Cooling Pad

I. Working Principle

Plastic evaporative cooling pads utilize the principle of heat absorption through water evaporation to lower air temperature. When air passes through the moist plastic pad, the evaporating water carries away heat from the air, thus lowering the air temperature. This process not only effectively reduces the temperature in the farm but also increases air humidity, improving the growth environment for livestock and poultry.

II. Material and Structure

Plastic evaporative cooling pads are typically made of high-strength, corrosion-resistant plastic materials, such as PP (polypropylene). These materials have good UV resistance and anti-aging properties, ensuring stable performance during long-term use. The pads have a special corrugated structure inside, which increases the contact area between water and air, improving evaporation efficiency.

III. Comparison with Other Types of Pads

Compared to paper pads, plastic evaporative cooling pads have the following significant differences:

Water Flow Characteristics: The larger corrugations on plastic pads allow airflow to easily pull water from the outer surface to the inner surface, resulting in a large amount of water flowing over the inner surface. Paper pads, on the other hand, retain most of the water on the outer surface, with virtually no water flowing over the inner surface.

Wetting Difficulty: Plastic pads don’t absorb water, requiring a larger volume of water to ensure complete wetting. Paper pads, on the other hand, absorb and retain a relatively high amount of water, making wetting easier.

Drying Speed: The reduced water retention of plastic pads means they dry faster than paper pads when the circulation pump is off. This can negatively impact cooling efficiency when timed operation.

Dirty Impact: The larger ripples on plastic pads mean that small amounts of dirt on the inner surface of the grooves have little effect on static pressure. Paper pads, however, are prone to rapidly increasing static pressure on the tunnel fan due to dirt/mineral buildup on their inner surfaces, thus reducing airflow velocity.