Evaporative cooling is when the air around a fluid is cooled due to the fluid’s evaporation into the surrounding air. The latent heat from the surrounding air is utilized to bring about this process of evaporation of the liquid. The Dry Bulb temperature and the Wet Bulb temperature are both anticipated to be quantified to determine the degree to which evaporative cooling is effective. This will allow one to assess the amount of water evaporated into the air.
Since evaporative cooling uses significantly less power—almost one-seventh as much as the conventional usage strategy—it is vital that our environment would contribute to the management and emission of glasshouse gases.
Evaporative cooler units consist of a cube-shaped box made of sheet metal that houses enormous vertical channel pads, a fan operated by an electric engine, a framework for water distribution, and a water pump located at the unit’s base. Coconut coir, stainless steel, and wood wool are the three materials used for pads.
The efficacy of the evaporative cooler in terms of cooling, the rate of water use, and air velocity were considered when conducting the performance study.
The following is a description of the three primary pad materials and the salient qualities of each:
- Aspen tree shavings are the primary ingredient in producing the most well-known pad made of wood fibers. Some people who own bog coolers say they prefer cushions made with aspen strands because they feel that this material creates the optimum balance between air and water. It allows more air to move through what is becoming progressively a partially submerged cushion, resulting in cooler air being produced within the house. The wood only partially absorbed the water, preventing an oversaturation that would lead to the water being trapped in the pad and warming up due to the water’s inactivity. They are not as pricey, but they have shorter life and need a lot of support.
- Cellulose: These pads are manufactured using cellulose paper that is then molded into a honeycomb structure. Because of the thick material, it can store significantly more water. This might be ideal in arid climates, where the water might evaporate all the more quickly, or in a scenario where your cooler has a powerful fan that generates more significant air speed across the pad, resulting in lower temperatures.
- Plastics generally are hydrophobic, pushing water out rather than absorbing it. Hence they are not absorbent in their natural state. In addition, they are economical and have a slim profile. Plastic pads can be utilized for a shorter period than their metal counterparts.
The Cooling Pads’ Role In An Evaporative Cooler
- The evaporative cooler pad is the most important part of an evaporative cooler since they produce a cooling effect.
- Water can pass through the cooling pads contained within an evaporative cooler.
- The water that travels through the pad will be pumped to complete the circulation process.
- After the water has passed through the pad, a fan will blow over it, releasing the air infused with water into the surrounding atmosphere.
- The surroundings will get cooler due to the little water droplets evaporating from the air.
A limited amount of electricity is required to power an evaporative cooler since the cooling pads handle the bulk of the work.