Air dehumidifier with desiccant rotor DFRD

Air dehumidifier with desiccant rotor. This range completes the B series with an additional fan to increase the specific drying capacity and the available wet air pressure. Other models air dehumidifier.

Air dehumidifier with desiccant rotor Features:

Drying capacities from 3 to 4.2 kg/h (*) and dry air currents from 300 to 700 m3/h.
Double fan for deep drying in closed circuit.
Stainless steel compact series, ready for operation.
Intelligent heaters.

Designed to occupy a minimum of space, these compact stainless steel units incorporate a silica gel dessicant rotor.

This provides maximum efficiency in retaining molecules of water vapour extracted from process air flow while the rotation assures continuous and uniform drying.

Air dehumidifier with desiccant rotor DFRD series

The compact solution

DFRD air dehumidifiers picture | Air dehumidifiers with deseccant rotor | Fisair

Commercial brochure

Technical Data Sheet

Related applications

Archives
Archives
Historical documents such as documentary archives, photographs and films are hygroscopic, and often made from organic materials.
When humidity is absorbed, microorganisms multiply and can cause serious damage.
Dehumidifiers are employed to create environments with low relative humidity levels to prevent attacks from microbes and avoid a need for heating, since they are only sensitive to the humidity content of the air.
Museums, archives and libraries (968,87 Kb)
A few references:
FNMT Ajuntament Barcelona Iron Mountain
Academia de Bellas Artes de San Fernando
Automotive industry
Automotive industry
Companies specialized in industrial painting processes applied to the automotive sector, aeronautics and other demanding fields, have placed their trust in FISAIR as the designer and manufacturer of units for controlling the humidity of the air during these processes.
More and more companies are opting for water-based painting, which requires high quality humidity controls for impregnation and drying.
Paint drying
A few references:
         Renault       Nissan       Dacia       Firestone
    Continental      Volkswagen       General Motors
     Volvo    Rolls Royce     Mercedes-Benz     Man
    Bridgestone         Magna       Taiki-Sha         Dürr
    Hella
Beer production
Beer production
The production of beer involves the growth of yeast in an environment suited to microbes that are harmful to the process.
Air dehumidifiers prevent product contamination.
Brewing industry (446,77 Kb)
Chemical industry
Chemical industry
Chemical industry requests many different and complex processes in which air humidity control is crucial. Low temperature drying, hygroscopic material processing, etc.
Fisair has the expertise of co-operating with many important firms of this sector.
A few references:
Yara Sipcam Inagra Solvay
Bayer Fertiberia Ercros
Cold storage chambers
Cold storage chambers
Humidity control is especially important in cold storage chambers. The temperatures in these spaces can be as low as -30ºC.
Chambers are often covered by a large quantity of frost, which reduces the quality of the process and increases energy consumption.
Our desiccant rotor air dehumidifiers are designed to solve this problem. For milder temperatures in smaller rooms, adiabatic humidification is usually the solution required to prevent weight loss in the stored products.
Humidity control in cold storage (461,65 Kb)
A few references:
H. Seabra       STEF       Clauger       GEA       ENGIE
       Johnson controls         Philip Dennis
Ramón Vizcaíno                Lidl logistics center
Commercial buildings
Commercial buildings
Relative humidity values for the air of between 40% and 60% are recommended in commercial and cultural buildings (cinemas, theatres, etc.), hotels, schools and colleges, and offices, etc.
A large number of studies have recommended these limits in the interests of the health and comfort of users, to avoid static electricity and to increase the durability of the buildings.
A few references:

Patentamt München

Minto Einkaufszentrum Mönchengladbach

MSD Tiergesundheit Schwabenheim - animal health

Haus der Zukunft Berlin

Friedrich-Schiller-Universität Jena

Eurodom Osijek - business and shopping center

CHEMIEZENTRUM DER UNIVERSITÄT WÜRZBURG

Berliner Schloss Humboldt Forum

Bergische Universität Griffeln Wuppertal

Hotel Korston Kazan

Ciudad financiera BBVA

Torre-Europa
Covered ice rinks
Covered ice rinks
Another sort of building typically requiring air humidity controls is ice-skating rinks.
The use of desiccant rotor air dehumidifiers in this kind of building prevents problematic mists and condensations from forming. These can turn into a kind of light drizzle falling on audiences, a consequence of the temperature of the ice being lower than the dew point of the ventilation air.
The units also play an important role in preventing the corrosion of the building and reduce the energy consumption of the facilities.
Humidity control in ice rinks (338,73 Kb)
Crop storage
Crop storage
A great many products derived from agriculture are also stored in unrefrigerated areas that do require humidity controls to prevent weight loss and a fall in quality resulting from very humid or very dry environments. Foodstuffs commonly stored with controlled humidity are coffee, dried fruits and nuts, drinks in hygroscopic wooden barrels, etc.
A specific example of these uses is the tobacco industry, in which the goal is for this hygroscopic material not to lose its aroma by keeping it in a dry environment throughout the production and storage process. A medium humidity also prevents it from losing its elasticity during production.
Crops grown in controlled humidity environments
Crops grown in controlled humidity environments
Many different crops are grown in controlled humidity environments.
Examples of crops grown with controlled humidity are flowers, mushrooms, and certain types of fruits and vegetables grown in greenhouses.
A few references:
Universidad Politécnica de Madrid - CSIC
Delicate foodstuffs
Delicate foodstuffs
Delicate foodstuffs are very sensitive to heat and must be dried at low temperatures to prevent the growth of bacteria and the breaking down of proteins.
Desiccant dehumidifiers are used to dry ham, fish, cheese, and dried meat products in general. Low temperature drying times would otherwise be too long to be economically viable.
Drying building work
Drying building work
Lastly, it is worth mentioning the drying out of building processes.
Desiccant rotor air dehumidifiers that can be transported easily from one room to another, can be used to speed up concrete and paint drying processes and thereby increase the productivity of processes, and in many cases reduce the end cost of buildings.
A few references:
De Beer Grupo Domingui
Film storage and manufacturing
Film storage and manufacturing
Many factors affect the air conditions of the film archive air humidity content: Length of the storage time, type of the films, type of image and their value. An excess of humidity could damage the film and their base in both black and white or color images. The film manufacturing process is also very demanding in air humidity conditions.
Film storage
A few references:
Filmoteca nacional española
Fototeca Pedro Guerra, U. Autónoma Yucatán (México)
Foodstuffs
Foodstuffs
The humidity content of the air must be controlled in the food industry for refrigeration, curing and fermentation processes, etc.
The objective is to lengthen the life of food items, to conserve their quality and aroma, and to prevent weight loss and decomposition.
A few references:
Navidul Argal El Pozo LDC Groupe
Campofrío Maitre Le Coq Bigard
Granulated material transport and storage – Silos
Granulated material transport and storage – Silos
Transport and storage of hygroscopic granulated material could be a serious problem if air humidity is not controlled. Either in the compressed air / worm gears or in silos, the air desiccant rotor dehumidifiers mean a standard for many companies specialized on advanced technology for solids transport.
A few references:
Solvay Bayer Galletas Guyol

Coca-cola Segura Viudas Refresco Iberia
Interior HVAC for ships
Interior HVAC for ships
Life on a modern ship requires HVAC suited to the levels of comfort required by the people aboard, the products stored, and the ship’s own complex machinery and facilities.
FISAIR designs and supplies units for controlling humidity for ships of all sizes with a wide range of different needs.
Laminated security glass
Laminated security glass
The manufacture of this kind of glass benefits greatly from the use of desiccant rotor air dehumidifiers.
There is a film of highly hygroscopic transparent plastic, which works as an adhesive, between each layer of glass.
In humid environments, the film can boil during the process and create steam bubbles which are trapped inside the laminated glass.
A few references:
Guardian AGP Essilor AB
Metal surface protection
Metal surface protection
Several coats of paint must be applied to exterior steel to protect it from corrosion in the naval industry and in large storage tanks for chemical products.
To apply the paint to the most vulnerable parts without leaving any kind of corrosion, the painting process requires the prior elimination of corrosion and cleaning, which makes the metal very vulnerable to corrosion until the protective paint is applied.
The humidity of the air surrounding the steel at this point must be controlled to ensure the manufacturer responsible for the coating can guarantee its useful life. FISAIR has developed its DFRC series for these processes, which it has supplied to large shipyards and prestigious firms working in this field.
Metal surface protection
A few references:
Dragados Off-Shore Navantia DCNS
Astilleros de Pasajes CNN    Ulstein verft as
Kleven verft as Havyard group Simek A/S
Bergen group asa Fiskerstrand verft as    Skarvik as
Vaagland båtbyggeri as Fitjar mekaniske verksted as
                                               Turku Meyer
Microcircuit manufacture
Microcircuit manufacture
The manufacture of microcircuits is another sector that requires the use of precision clean rooms. Light sensitive resins are employed to conceal circuit lines and protect them from chemical attack. These polymers are hygroscopic. If they absorb humidity, the microscopic lines of the circuits can be cut or bridged, causing short circuits.
The use of desiccant rotor air dehumidifiers in these processes increases the quality of products and the efficiency of the process.
A few references:
Eika Lab World
Vertex Antennentechnik La Reunion
Optoskand AB
Museums
Museums
Worthy of special mention as places in which people work and circulate in large numbers, are museums, galleries and exhibition centres, which exhibit works of art. These works are commonly made of organic materials.
Without quality humidity control, highly valued works of art can become cracked or fade. Wooden parts of works can, in extreme cases, break as a result of contraction caused by the differences between the humidity of the place in which they are made and the humidity where they are exhibited.
Museums and libraries
A few references:
Museo del Prado, Madrid
Museo Picasso, Barcelona
Nouveu Musee National, Mónaco
Museo Diocesano Bisbat, Lleida
Museo Frederic Marès, Barcelona
Museo Bellas Artes, Murcia
Projekthalle henning Ingoldstadt Lappeenranta City, Photos Museum
Pharmaceutical industry
Pharmaceutical industry
Precise humidity control is essential in the pharmaceutical industry, with highly hygroscopic components in the form of powder. Some production processes need the air to be thoroughly dried with specific units. Humidity control must be precise to prevent a loss in quality and durability of the products.
For more than fifteen years, FISAIR has been supplying and installing tailor-made units in the most prestigious firms to ensure environmental humidity controls in production, storage and transport processes.
Pharmaceuticals and Cosmetics industries (283,20 Kb)
A few references:
GSK       Rottapharm-Madaus       Merck
Alter       Sigma-Tau    Salvat     Roche

       Bayer    Lindopharm   Ely Lilly     Sanofi
Pfizer       Teva    CERN    Catalent
Pisa     MSD
Stockholms Universitet Institutionen
Plastics industry
Plastics industry
The plastics industry requires dry environments to prevent product imperfections making them unusable at humid times of year. Injection moulds commonly contain cooled water circuits to speed up the cooling of the pieces of plastic. If humidity condenses on the mould, the plastic pieces are not acceptable and the surface of the mould can suffer thermal shocks.
FISAIR has worked with the most demanding industrial companies in the field of plastics to supply dry air over the surface of moulds. The mould temperature is therefore reduced and the productivity of the bottling industry or plastic pieces manufacturer is increased.
Plastic Industry (667,53 Kb)
A few references:
Valeo       Faurecia       Jovi
APPE       Solan de Cabras      La Casera
       Aguas de Mondariz        Coca-Cola
Production of sweets
Production of sweets
Hard sweets contain hygroscopic components that turn the product sticky in the presence of high humidity levels. This change can slow up the industrial process and cause hygiene problems.
Desiccant rotor dehumidifiers are able to create controlled environments that increase productivity.
The productivity of the process of producing coated sweets is increased in a controlled dry environment.
High quality coated sweets and chocolates with a shiny finish are nearly always produced in this way.
Confectionery industry (769,94 Kb)
A few references:
Haribo       Cadbury       Nestlé       Damel       Arcor
       Super de Alimentos         Chupa-chups
Mars        Hispania        Hermanos Juan López
                                                      Ferrero
Pyrotechnics materials
Pyrotechnics materials
Pyrotechnic materials made in different factories and stored in a variety of locations must be kept at specific relative humidity levels to prevent product faults.
FISAIR has supplied companies specialised in this sector for decades.
Storage of arms and ammunition
Storage of arms and ammunition
The security and armed forces of the country undertake tasks requiring complex equipment and ammunitions ready for use at any moment.
Desiccant rotor air dehumidifiers guarantee the usability of this material and the correct storage of the ammunition used by the equipment. It also serves to prevent corrosion in the equipment and reduces electronic faults in control systems.
Chemical reactions that could have harmful effects are also prevented in the ammunition.
Storage of weaponry (648,95 Kb)
A few references:
Ertzaintza       Guardia Civil       Belgium Air Force
Spanish Army       New Zealand Royal Army
       Irak Army        Finnish Army
Storage of seeds
Storage of seeds
Seeds are one of the organic materials most sensitive to microbial attack. When humidity levels are high, microbes multiply and destroy important nutrients contained in the seeds.
Desiccant rotor air dehumidifiers can be used in research laboratories and for commercial uses, to greatly increase crop performance.
Storage and conservation of seeds (920,74 Kb)
A few references:
Hy Seeds Monsanto
INIA - UPM Madrid University
Thermal power stations
Thermal power stations
During thermal power station stoppages due to excess energy supply, or compulsory servicing, desiccant rotor air dehumidifiers can be installed to guarantee the protection of turbines and other parts of the circuit. This is an alternative to the method involving the flooding of the circuit with protective liquid containing corrosion inhibitors.
The dry method means the power station can be rebooted quicker than with the wet method. The current situation of excess supply from renewable energies and combined-cycle plants tends to make the dry air method more successful in terms of cost savings and ease of use by the maintenance team of the power station.
Thermal power stations conservation (602,08 Kb)
A few references:
Alstom       General Electric       Endesa
Iberdrola       Foster Wheeler      Enel
       Endel       Vantaa       Rolls Royce
Water treatment plants
Water treatment plants
Similarly, in water treatment plants, it is possible for underground water and temperatures of lakes to be lower than the dew point of the air, which can cause condensation on the outside of pipes, valves and controls of the plant. Supplying the plant with dry air prevents condensation leading to the growth of mould, and reduces costs such as painting pipes and regular replacement of controls and valves.
In addition, the health benefits of eliminating the mould and bacteria are increasingly important as consumers become ever-more sensitive to water quality problems.
Humidity control in water treatment plants (476,36 Kb)
A few references:
Consorcio de aguas de Bilbao MPWiK Lublin
Wind energy industry
Wind energy industry
The wind energy industry is faced with a range of challenges in which climatic conditions and environmental factors have a direct impact on the quality and performance of wind turbines.
Worthy of special mention are environments and conditions with excessive humidity levels, over and above the resistance levels of the materials employed.
The challenges resulting from excess humidity in the wind energy industry have an impact at every stage of the value chain:
Quality at the manufacturing, and storage and transport stages, and following installation.
Wind energy industry (350,14 Kb)
Wineries
Wineries
Wine is stored in wooden casks during the production process. Wood is a hygroscopic material that emits humidity if the relative humidity of the air in the surrounding environment is low. The container takes this humidity from its contents, that is to say, the wine. That is why, if the barrels containing the wine are stored in environments without any kind of humidity control, a major reduction in the quantity of product can occur, which leads directly to a fall in the quantity that can be sold.
The vast majority of wineries have adiabatic humidification systems. FISAIR has worked with a large number of them.
A few references:
Barbosa Jaume Serra Freixenet