The Working Principle of Rundongfang Cooling Water Curtains

Rundongfang water-based cooling mainly relies on the physical principle that water absorbs heat from the air during evaporation, thereby lowering the air temperature. In practice, it is used in conjunction with negative pressure exhaust fans. The wet curtain is installed on the gable or side wall at one end of an enclosed building, while the fan is installed on the gable or side wall at the other end. The cooling fan extracts indoor air, creating negative pressure that forces outdoor air to flow through the surface of the porous wet curtain, transferring a large amount of heat from the air. This lowers the temperature of the air entering the room by 10-15℃, which is continuously introduced indoors for heat relief and cooling.

Water evaporation and heat absorption is a very common physical phenomenon in nature. This principle is also used in cooling water curtains. The integrated application of the Rundongfang wet curtain cooling system with negative pressure fans is based on the thermal principle that water evaporation absorbs heat and cools the air, fully demonstrating the three key elements of the water evaporation heat absorption principle: 1. The surface area of contact between water and air; 2. The speed of air circulation; 3. The temperature of the water itself. The efficiency of water evaporation and heat absorption is directly proportional to these factors. 1. Driven by the water pump and gravity, water flows from top to bottom, forming a corrugated water film on the surface of the wet curtain’s corrugated fibers with a total area equivalent to more than 10 times the apparent surface area of the water curtain, so the contact area between the water film and the air is extremely large. 2. Due to the “air pressure difference” created by the exhaust of the negative pressure fan, outdoor air passes rapidly through the cooling water curtain and collides with the water film, allowing the heat in the air to be quickly absorbed by the extensive water film. 3. As the water temperature rises, evaporation intensifies, and the amount of heat carried away by the water increases. In other words, the more pronounced the cooling effect.

Cooling water curtain / wet curtain wall cooling equipment is installed at one end of the factory windows, and negative pressure fans are installed at the opposite end. The negative pressure fans extract hot air from inside the factory. While ventilating, dissipating heat, and removing dust, an air pressure difference is created between the inside and outside, prompting outside air to pass through the water film formed by the cooling Rundongfang water curtain / wet curtain wall, where evaporation absorbs heat and cools the air instantly. The cooled air is continuously blown into the factory, thereby creating a comfortable, cool, and fresh working environment. No matter how hot the summer is, the cooling wet curtain + negative pressure fan ventilation and cooling system can keep your factory temperature consistently between 24℃ and 29℃, circulate air inside and out, increase the oxygen content of the air, greatly reduce the occurrence of occupational diseases, and thereby improve work efficiency!