gradd - 2 Stage evaporative cooling
Two-stage evaporative cooling, also known as indirect/direct cooling, is a technique which combines both indirect and direct cooling methods to cool the air. In the first stage, cold recirculated water is used in a heat exchanger to pre-cool the ambient air. This process does not add any additional moisture and results in lower dry bulb and wet bulb temperatures than those of outside air when leaving the heat exchanger. The second step involves direct adiabatic cooling through wet evaporative media which brings down the temperature even further. This two-step method allows for much lower temperature levels that are unable to retain high amounts of humidity.
Oxycom's IntrCooll utilizes a two-stage evaporative cooling process that offers numerous advantages compared to traditional single-step evaporative cooling systems. This advanced system works by drawing in outside air and passing it through two successive stages of evaporation before the cooled air is circulated throughout the building. The first stage removes large particles, dust, pollen, and other airborne contaminants from the incoming air while also reducing its temperature slightly. The second stage further reduces the temperature of this filtered air before it is directed into interior spaces for ventilation and climate control.
Benefits of Oxycom's two-stage evaporative cooling system
Up to 60% less moisture in the supplied air than single stage Evaporative cooling systems
Up to 30% less water consumption than single stage Evaporative cooling systems
Up to 90% lower energy consumption when compared to compressor-based air conditioning
Energy-efficient cooling vs
power-surging cooling
Many people are still hesitant to switch from conventional air conditioning to evaporative cooling despite its effectiveness and environmental benefits. Evaporative cooling is a much more efficient option in terms of energy usage, with two-stage systems providing an even greener solution than the single-stage variety. The result is a cooler environment that uses significantly less electricity, meaning lower costs for businesses and reduced emissions into the atmosphere. Furthermore, evaporative coolers provide better indoor air quality through natural humidity control. Evaporative cooling should be seen as an attractive alternative to conventional air conditioning due to its efficiency, cost savings, improved indoor air quality and minimal carbon footprint. It provides a sustainable climate solution for any industry looking to reduce their energy consumption while maintaining comfortable working conditions.
Optimal air humidity vs dry indoor air
Evaporative cooling is a process that relies on the evaporation of water to cool an environment. Its effectiveness depends largely on the relative humidity of the climate in which it operates; systems are more effective in hotter, drier climates. In tropical regions, evaporative cooling may not be as efficient as in other areas. However, indirect/direct evaporative cooling systems have proven to perform better than direct systems even during humid hours and in more humid coastal regions.
2 Stage, Indirect-Direct Adiabatic cooling vs. Conv. Air conditioning
Minimize your carbon footprint!
Air conditioning is a good way to keep comfortable in any climate. It is not affected by relative humidity, but the hotter it gets outside, the more energy it takes to provide adequate cooling. This means you have to decide whether you want to spend 90% more on consistent cooling all year round or save up and settle for slightly less efficient cooling only during a few hours of high temperatures each year with evaporative cooling instead.
If you are striving to create a zero-emission world and wishing to provide your employees with an environment that promotes health and comfort, evaporative cooling is the answer. Our product page offers additional information on the potential for sustainable industrial cooling solutions.
The airborne spreading of COVID-19
Humidity levels in the air can affect how long a virus stays alive and how far it travels. Low humidity dries out these droplets, making them easier to spread. On the other hand, high humidity keeps droplets from evaporating quickly and makes them heavier so that they drop to the ground faster. The recommended indoor relative humidity level is between 40-60%. To ensure this ideal range of indoor humidity is achieved, consider investing in an air humidifier or dehumidifier. These tools help regulate the amount of moisture in your home or office environment and keep you safe from airborne viruses.
"The right humidity level can slow the spread of the Coronavirus"; according to Yale scientists.
According to Prof. Dr. Akiko Iwasaki of Yale, when the relative humidity is around 50%, viruses are repelled and our immune system can generate stronger responses. In dry air, however, our body's ability to defend itself against pathogens is weakened. To protect us from illness, our bodies rely on mucous membranes in the respiratory tract and other means; however, with dry air these mechanisms become less effective as it causes the mucus in our mouth to be "sticky", preventing cilia (the hairs that cover the mucous membrane) from vibrating properly and thus inhibiting their ability to remove unwanted intruders from entering our bodies.
In the past, it was common to place a pan of water on the stove in order to maintain an appropriate level of humidity in living spaces. However, nowadays, most homes and buildings focus more on temperature than air humidity. Fortunately, there are modern indoor climate solutions that help keep the air in these spaces at a healthy 40% relative humidity. One such solution is indirect/direct adiabatic evaporation, which utilizes 100% fresh air and a small amount of water for maximum efficiency and sustainability.
Maximum ventilation for a safe workspace
Temperature is widely considered to be a key factor in ensuring human comfort. However, ventilation and air humidity are often overlooked. Often, legislation only requires the necessary amount of fresh air per person due to higher energy consumption associated with increased ventilation rates. Recently, though, as the coronavirus pandemic has taken hold, more and more scientists have come to recognize that maximum ventilation is essential for staying healthy in addition to maintaining relative humidity levels at 50%. When it can be done efficiently, ventilating rooms should be encouraged.
Ventilation is a key factor in air purification and reducing the amount of virus particles present, according to REHVA. Bringing clean air from outside into buildings helps to dilute and displace contaminated air, making it cleaner. The more often a room is ventilated each hour, the better quality of air it will have.
Ventilation solutions for industry
The HVAC industry has an important task ahead of them: optimizing the technology to meet environmental observations without increasing energy consumption. This presents a unique challenge for all producers, as controlling energy usage often requires limiting the amount of fresh air added into existing cooling systems.
Ventilating rooms with fresh air and keeping humidity levels optimized can drastically reduce the risk of pathogens spreading, creating a healthier and more comfortable working environment. To maximize ventilation while bringing temperatures to a pleasant level, indirect/direct adiabatic evaporation systems should be used. These systems are up to 90% more efficient than traditional methods.
Our advanced two-stage evaporative coolers offer a significant advantage in terms of energy efficiency over conventional refrigerant-based AC systems, as the American Society of Heating and Engineers (ASHRAE) estimates they can use up to 75% less electricity. This makes them an especially great choice for those living in warm, dry climates like the American Southwest, in cities like Phoenix and Tucson, Arizona, as well as Las Vegas, Palm Springs, and other cities in California.
