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WHY IS HUMIDITY CONTROL IMPORTANT:
Humidity control is an essential aspect of HVAC systems as it affects indoor comfort, health, and energy efficiency. High humidity levels can lead to discomfort, mold growth, and poor air quality, while low humidity can cause dry skin, respiratory problems, and damage to furniture. HVAC systems use humidifiers and dehumidifiers to maintain proper indoor humidity levels, which can improve indoor air quality, reduce the risk of mold growth, and increase energy efficiency. Proper humidity control is crucial in ensuring a comfortable and healthy indoor environment.
Atomisers – evaporative cooling
This product is available in CAREL CPQ, the sizing and selection tool that lets you independently find the right CAREL solutions for you, download the related documentation, receive support, and generate quotes and orders.
“Evaporative Cooling” is the process in which water cools the air through evaporation. For this to happen spontaneously, without the contribution of external energy, the water must be atomised in the air as very fine water droplets which, having a lower surface tension than the surrounding air, evaporate into the air.
Why does the air cool down?
No contribution of external energy is necessary, however, owing to its nature, the water evaporation process requires a certain amount of energy. This energy is removed from the air itself which, in order to absorb the water must release sensible heat, thus lowering its own temperature.
Every kilogram of water that evaporates absorbs 0.69 kW of heat from the air. This is how the dual humidification and cooling effect of the air is obtained through the Evaporative Cooling process, which in many air handling applications represent two desired effects.
Energy Saving
The rapid development of evaporative cooling in HVAC applications is surely due to its very low energy impact. If we compare the cost for energy regarding Evaporative Cooling with that of other types of air transformations (e.g. humidification with steam emission or air cooling via chiller), it can be seen that the energy saving is considerable. The only energy required is for water pressurisation, which is sent to the atomiser nozzles by a pump. Consumption is about 4 to 8 W for every l/h of atomised water. Optimist atomisers CAREL supplies a complete range of products that make use of the principles of evaporative cooling and all its advantages. The standard composition of these products is:
- cabinet, containing the pump for pressurising the water, an inverter and an electronic controller for modulating the production of atomised water instant by instant;
- atomiser nozzles, able to atomise the water into very fine water droplets (in the order of a few hundredths of a millimetre), extending the heat exchange surfaces.
- distribution system, composed of stainless steel manifolds, atomiser nozzles and drain valves, in order to guarantee emptying.
Optimist atomisers CAREL supplies a complete range of products that make use of the principles of evaporative cooling and all its advantages. The standard composition of these products is:
- cabinet, containing the pump for pressurising the water, an inverter and an electronic controller for modulating the production of atomised water instant by instant;
- atomiser nozzles, able to atomise the water into very fine water droplets (in the order of a few hundredths of a millimetre), extending the heat exchange surfaces.
- distribution system, composed of stainless steel manifolds, atomiser nozzles and drain valves, in order to guarantee emptying.
Centralised steam distributors
This product is available in CAREL CPQ, the sizing and selection tool that lets you independently find the right CAREL solutions for you, download the related documentation, receive support, and generate quotes and orders.
ultimateSAM is a pressurised or atmospheric-pressure steam distributor, designed to distribute dry steam uniformly and efficiently in ducts or air handling units. SAM stands for Short-Absorption Manifold, meaning a steam distributor with a short absorption distance (even less than 200 mm).
It has been designed to be “made to measure” for the AHU or duct, while ensuring low air heat gain (max. 2 °C/4 °F). All of the metal parts installed inside the AHU or duct are made from AISI 304 steel, so as to guarantee hygiene and a long operating life.
The features of the ultimateSAM steam distribution system make it the perfect system for all AHU/duct humidification needs, providing designers, installers and service personnel with the best possible solution.
The wide range of products, with a vast choice of steam flow-rates and numerous options, make it the ideal system for various applications, including hospitals and the pharmaceutical industry.
Centrifugal humidifiers
This product is available in CAREL CPQ, the sizing and selection tool that lets you independently find the right CAREL solutions for you, download the related documentation, receive support, and generate quotes and orders.
humiDisk is a small yet sturdy humidifier that uses a spinning disk to atomise water and transform it into millions of very small droplets that, blown by a built-in fan, are introduced into the environment, where they evaporate, humidifying and cooling the air.
Very low power consumption
humiDisk is a simple, economic and easy to maintain humidification system, with an energy consumption of just 220 W for 6.5 kg/h of capacity (31 W for the 1.0 kg/h model).
Guaranteed hygiene
The water tank inside the humiDisk contains just 0.055 litres of water, which is atomised, at maximum capacity, in just 30s for the 6.5 kg/h model and 3 minutes for the 1 kg/h model. The water in the tank is therefore changed very rapidly, meaning the humidifier substantially works with non-stagnant running water, so as to guarantee the best hygiene conditions.
Adjustable capacity (humiDisk65 only)
Operation of humiDisk65 controlled by an electronic board fitted with a trimmer for setting humidifier capacity, from 1.1 to 6.5 kg/h, making it suitable for all applications.
Automatic washing cycles (humiDisk65 only)
The board, as well as managing normal unit operation, also performs a tank washing cycle when starting the unit, and an emptying cycle when humidification is no longer required. This avoids having stagnant water inside the unit.
Important: to ensure a higher level of hygiene, when using the CAREL electrical control panels, the humidifier also washes the water tank at the start of each humidification cycle.
Water used
humiDisk can operate on both mains water or treated water. The quantity and quality of the minerals dissolved in the water affect the frequency of the routine maintenance operations and the amount of dust generated. For best operation, use demineralised water (do not use softened water, as this does not reduce the content of minerals dissolved in the water). In any case, observe the requirements of UNI8884 standard “Characteristics and treatment of the water in cooling and humidification circuits”, according to which the main characteristics of the water are conductivity < 100 μS/cm and total hardness <5 °fH (50 ppm CaCO3). Similar requirements are also specified in standards VDI6022, VDI3803.
Compressed air water atomisers
This product is available in CAREL CPQ, the sizing and selection tool that lets you independently find the right CAREL solutions for you, download the related documentation, receive support, and generate quotes and orders.
Compressed air humidifiers are the ideal humidification solution whenever a compressed air supply is available, as is the case in many industrial applications, even if humidification systems are often fitted with a dedicated air compressor. The humidifier essentially consists of a cabinet fitted with electronic controller that, using two independent connection pipe networks, supplies the spray nozzles with compressed air and water at the ideal pressure for instant operating conditions.
The units can be installed inside an AHU or directly in the room where humidity needs to be controlled. The greatest advantage of these atomisers is the minute dimensions of the droplets produced and their thorough mixing in the compressed air that, due to its speed, distributes the aerosol in the room and consequently allows quick absorption. These units can therefore be readily used for direct cooling in rooms, and are ideal for the textile industry, wood and paper processing, and storerooms, where there is almost always a supply of compressed air.
mc multizone features an electronic controller that manages the supply of water and compressed air to the nozzles.
Water atomisation is managed by an external control signal or, in the case of stand-alone control, so as to maintain the humidity/temperature set point. The unit also manages a series of automatic cycles, such as nozzle cleaning and washing.
The system has the ability to control humidity independently in multiple zones (rooms, AHUs, cold rooms) using a main/secondary layout. The layout has one master and multiple clients (up to 5) connected in a pLAN. The master is fitted with a display for accessing the readings, viewing the status and messages on the master and clients. The clients have their own internal controller and can be set to continue operating even if connection to the master is interrupted.
Dehumidifiers
Dehumidification is vital for many industrial processes, and desiccant is considered the most effective method. Most dehumidifiers look the same, but what sets them apart is the desiccant wheel – the heart of the system. This critical dehumidifier component efficiently removes moisture from the air.
FD160 – 980
The Fral industrial dehumidifiers of the series FD are suitable for humidity control in commercial and industrial spaces. Particularly sturdy and durable, they can be easily installed and are easy to maintain. They can also be placed in environments for the preservation of food products or in industrial processes where humidity control is necessary.
They feature a washable air filter and must be connected to a fixed drain. They are equipped with an onboard mechanical dehumidostat. Is it possible to connect a remote digital dehumidostat. The Fral fixed dehumidifiers of the series FD can be equipped with an optional HOT GAS defrosting system, with electronic and thermostatic control, and can work with temperatures close to 0 °C.
FDK44 – 100
The Fral professional fixed dehumidifiers of the series FDK are high-performance, compact, easy to install appliances and can be used in multiple applications. They feature a high-efficiency filter in polyurethane, washable and easily replaceable, which can be connected to a fixed drain. They are equipped with strong handles for easy handling, rubber feet and an onboard mechanic humidistat. The Fral industrial dehumidifiers of the series FDK are equipped as standard with a Hot Gas defrosting system, with electronic and thermostatic control, and can work with temperatures close to 0 °C.
FDNP33 – 96
The Fral portable professional dehumidifiers of the series FDNP are high-performance appliances, equipped with robust galvanized steel frame coated with epoxy resins and mounted on 2 big wheels that make it easy to move even in yard environments or in case of obstacles. They have a high efficiency air filter in polyurethane, washable and easily replaceable, and a very large condensate collection tank with the possibility of direct drain. It is possible to install a condensate lifting pump instead of the collection tank, allowing condensate pumping up to a height of 3.5 meters from the machine positioning level.
FR1050 – 3150T
The FR series dehumidifier are equipped with a high capacity rotor wheel and is designed for the larger and more challenging applications than the smaller series FR. The special design layout that allows very easy access to all of the components for service and installation. The FR range is able of ensuring dehumidification process even in extreme conditions from -20°C to +40°C and reaching dew points down to -60°C tdp therefore ensuring a continuous and controlled treatment.
Compact Design; Open design layout allows Extremely Easy Service, Stainless Steel for long term reliability, PLC control with display terminal. As optional the machne can be equipped with Recovery regeneration heat, Pre-cooling water coil, Post-cooling water coil, Post-heating water coil. RS485 ModBus Interface or other protocols and other accessories or special customisation on request or different voltage.
FR120 – 1280
The series FR Dehumidifiers are perfect for smaller applications that require hard working humidity control and long term performance reliability. The special design layout that allows very easy access to all of the components for service and installation.
FR3050 – 5050
The FR series dehumidifier are equipped with a high capacity rotor wheel and is designed for the larger and more challenging applications than the smaller series FR. The special design layout that allows very easy access to all of the components for service and installation. The FR range is able of ensuring dehumidification process even in extreme conditions from -20°C to +40°C and reaching dew points down to -60°C tdp therefore ensuring a continuous and controlled treatment.
Compact Design; Open design layout allows Extremely Easy Service, Stainless Steel for long term reliability, PLC control with display terminal. As optional the machne can be equipped with Recovery regeneration heat, Pre-cooling water coil, Post-cooling water coil, Post-heating water coil. RS485 ModBus Interface or other protocols and other accessories or special customisation on request or different voltage.
FR7000 – 26000
The FR series dehumidifier are equipped with a high capacity rotor wheel and is designed for the larger and more challenging applications than the smaller series FR. The special design layout that allows very easy access to all of the components for service and installation. The FR range is able of ensuring dehumidification process even in extreme conditions from -20°C to +40°C and reaching dew points down to -60°C tdp therefore ensuring a continuous and controlled treatment.
Compact Design; Open design layout allows Extremely Easy Service, Stainless Steel for long term reliability, PLC control with display terminal. As optional the machne can be equipped with Recovery regeneration heat, Pre-cooling water coil, Post-cooling water coil, Post-heating water coil. RS485 ModBus Interface or other protocols and other accessories or special customisation on request or different voltage.
Humidification
Dehumidification
HVAC Measuring instruments
HVAC Sensors & Field Devices
Air Particles Counting
Microbial Air Sampler