Dehumidification Technologies: Basic Methods and Emerging Trends

by Lisa Hayden
Humidity written on Glass

Treating air is a necessary procedure in many standard and non-standard processes, whether in manufacturing or other industries. Part of the practice is humidity control, which is essential for moisture can have a detrimental impact on building materials. Not only that, it can have a massive negative effect on the comfort of the occupants of the building.

A more severe impact that improper humidity control may have is to derail the performance of workers in a facility where hygroscopic materials are handled. It goes to say that humidity is one of the critical aspects of a building that many overlooks. It affects the health, comfort, and performance of people and the building itself.

It is no wonder commercial dehumidifiers are an essential part of buildings and factories’ operational systems. An industrial dehumidifier is there to extract the particles of water in the ambient air, thus preventing condensation. Such equipment is essential for businesses, saving them from costly machine repairs, interior maintenance, or furniture replacement.

At the same time, dehumidifiers help workers have much better working conditions. However, that is not to say that the process involved doesn’t face any difficulties. Fortunately, the technologies used for the dehumidification process significantly improved in the last few years. Today, controlling indoor humidity has become much easier.

Basic Dehumidification Methods

There are three basic methods of dehumidification. They are heating and ventilation, adsorption, and condensation. The dehumidifying process involves the unit reducing the steam contents, water particle, or moisture contained in the air. It seems like a simple process, but there are several ways how it is done. They are:

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Heating and Ventilation Method

The heating-and-ventilation method involves increasing a room’s air temperature, followed by intense ventilation applied. The thing is it is not as efficient as other methods since both its possibility of use and effectiveness depend on external conditions. This method achieves the best results during winter.

It is because the method is most effective when the dehumidified room has a higher temperature while the external environment has a lower temperature. Thus, it is not ideally applied during spring and autumn, much more so during summer. Dehumidifying humid walls with this method is tricky while using gas heaters is not ideal.

Another critical consideration in deciding to use this method is the high costs connected to it. This method is expensive, mostly because the dehumidifying takes a long time. Also, achieving the best results is only possible at the highest temperatures. Thus, it is going to need plenty of heating power.

Adsorption Method

Adsorption method is as it sounds – the hygroscopic materials remove humidity from air by adsorbing it. The application of this method employs adsorptive dehumidifiers. They are devices constructed with a rotor often made with properly profiled aluminum sheets. With that, the rotor has axial capillaries with a hygroscopic-covered surface.

It results in the dehumidifier having a large humidity-absorbing area. An electric motor by a (usually) belt-type transmission drives the rotor. The air is dehumidified behind the rotor, which is called the dehumidifying sector. Another section of the device is the regeneration sector, where the hot air flows and then sent outside.

One of the good qualities of this dehumidifier is its rotor is washable, highly durable, and can even self-clean. Thus, there is little chance of bacteria developing. Moreover, absorption dehumidification allows dehumidifying air at sub-zero temperatures and even without cooling. Therefore, it is widely used in the food and pharmaceutical industries.

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Condensation Method

This method removes humidity using condensation air dehumidifier, which cools moisture in the air that causes out-dropping of humidity. The dehumidifier consists of an extractor fan, heat exchangers, compressor, and expanding element. With the extractor fan, humid air is forced out through the heat exchangers.

Because the evaporator temperature is below the dew point temperature, the steam condenses. These condensates gather on the walls of the dehumidifier tank, which are removed often through the sewage system. The air passes through the evaporator, which cools and dries it then heated again when it flows through the condenser.

The dry air goes back to where it came from, thus effectively improving the humidity in that room.  Just like the heating-and-ventilation method, a few things affect the efficiency of this method. Specifically, they are the type of machines used and operating conditions. Still, it is more economical and practical than other dehumidification ways.

Emerging Trends on Dehumidification

The market outlook for the global dehumidifiers market is said to have a projected growth rate of 7.3% from 2018 to 2023. More and more consumers show increased inclination towards having better air quality at home, thus fueling the significant growth of the market.

Dehumidifiers used to be crucial devices in commercial and industrial facilities. Today, it has also been an essential appliance in residential buildings for maintaining a specific level of moisture. It plays a vital role in controlling moisture content in food packaging and many other industries, given the ever-changing weather and seasons.

Increased Online Demand Among Consumers

Among the top emerging trends in the dehumidifier market is its increasing online demand. In the global residential dehumidifier market, it is the e-retailing that is the quickest segment to grow. What fuels this growth is a simple process for purchasing products from the market’s key retailers.

The process for buying online is now cost-effective and time-saving that most consumers look online for whatever product they need. Given that numerous websites offer a wide array of dehumidifiers, it is unsurprising that demand increased. Residential dehumidifiers are particularly popular with consumers who look for convenience and accessibility.

Desiccant Dehumidifier Expected to Grow 3.8% and Reach 650M US$ in 2024

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In a recent market report, vital statistics on the status Desiccant Dehumidifier Manufacturer has in the market shows there will be an increasing demand for the product in the coming years. The market is said to expect more advanced dehumidifiers in the future, which will be driven by the North American and European markets.

There will be an increase in industrial field expenditures. The market will be locked in fierce competition with new product launches, renovation and retrofitting of old technology, as well as developing countries accepting desiccant dehumidifiers. All these will drive the global dehumidifier market’s growth.

Some enterprises will always be hesitant as the global economy in the coming years is uncertain. Because of this, the growth rate may not keep as fast as some would expect, but it will still be promising. Its global growth at a CAGR is estimated to be around 3.8% and will reach 650 million US$ in the next five years.

Electrostatic Dehumidifier Will Witness the Fastest Growth

More and more consumers become aware of the side effects of poor indoor air quality on health. This increasing awareness supports the dehumidifier’s market growth, particularly in residential applications. One of the trends expected to experience fast growth in the coming years is the use of electrostatic dehumidifiers.

The growing problem of respiratory illnesses around the world due to pollutants in the air will fuel this growth. While electrostatic dehumidification is still in the laboratory, it excites the industry for the possibility of decreasing the energy consumed for dehumidification amidst the increasing demand.

Development of Innovative Techniques and Technologies

With homeowners becoming more health-conscious, new technologies and techniques meant to improve the current dehumidifiers are underway. Besides electrostatic dehumidifier, there is the membrane technology that can reject humidity from spaces along with providing ventilation. It is a unique technology for controlling the indoor environment.

Technology Development Supports Decrease of Prices

The more demand that the dehumidifier market experience, the more technology is being developed to keep up. With that, the market will also enjoy more products that will support a decrease in prices. Now that more consumers are concerned about their health, they will look more for quality, but inexpensive dehumidifiers.

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The dehumidifier market is easily one of the markets in the coming years that will enjoy steady growth. It is not likely that the need for better indoor air quality will let up, and thus, consumers will need more dehumidifiers.

Contractors and retailers will be the ones to receive the most profits, specifically from the replacement market. They will be making huge profits, given that residential dehumidifiers have an average lifespan of 1 to 5 years.

Moreover, the market is not only the residential sector but the industrial and commercial sectors too. People will replace their dehumidifiers for more sustainable options to save household energy consumption and enjoy the convenience that these devices have to offer. 

Dehumidification technologies greatly improved in the last few years. Now that more new devices, techniques, and methodologies are emerging, it will be much easier to control humidity and have a better indoor environment for improved quality of life.

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