In heating applications, this technique can be utilized advantageously to convey heat from the ceiling in a better way and attain good comfort in the occupied zone.
A comfort module differs from a climate beam by distributing air in four directions instead of two. This maximizes the area for the mixture of supply air with the room air, which enables you to take out a high capacity, but without occupying more ceiling space than necessary.
|
PARASOL Classic |
PARASOL Zenith |
PARASOL Zenith DCV |
Cooling |
X |
X |
X |
Heating |
X |
X |
X |
Supply Air |
X |
X |
X |
Air Flow |
| ||
Constant (CAV) |
X |
X |
|
Variable (VAV) |
X | ||
Installation | |||
Integrated |
X |
X |
X |
*Please consult Swegon NA for suspended installation options
PARASOL Classic |
PARASOL Zenith |
PARASOL Zenith DCV | |
Primary Airflow |
Up to 117 cfm |
Up to 233 cfm |
Up to 233 cfm |
Pressure Range |
0.2 – 0.6 in.wg |
0.2 – 0.8 in.wg |
0.2 – 0.8 in.wg |
Cooling Capacity |
Up to 7018 Btuh |
Up to 7012 Btuh |
Up to 7012 Btuh |
Heating Capacity |
Up to 9200 Btuh |
Up to 9213 Btuh |
Up to 9213 Btuh |
Sizes: | 24″ module: 24 x 24 in. 48″ module: 48 x 24 in. | 24″ module: 24 x 24 in. 48″ module: 48 x 24 in. 72″ module: 72 x 24 in. | 24″ module: 24 x 24 in. 48″ module: 48 x 24 in. 72″ module: 72 x 24 in. |
Heights |
8.66 in. |
9.8 in. (PF+11.4) in. |
9.8 in. (PF+11.4) in. |
4 way Comfort Modules provide full coverage vs. 2 way chilled beams
Swegon PARASOL comfort modules have 4-way air discharge airflow with induction function. PARASOL comfort modules are active type using the primary air to induce room air through a coil to heat or cool the space without the need for fans. This delivers very quiet operation and minimal maintenance requirements. Unlike a 2-way air discharge chilled beam, air distribution to the room occurs from all 4 sides of the unit providing excellent mixing to all parts of the room. This ensures comfort level throughout the occupied zone. The PARASOL comfort modules are designed for dry systems, i.e. without condensation and therefore do not require any condensate drainage system or any filter. The minimum number of moving parts and lack of filter guarantees very little need for maintenance.
The PARASOL comfort modules are also optimized to quickly mix the discharge air with room air providing better comfort in the room. In heating applications, this technique can be advantageously utilized to efficiently provide heat from the ceiling. The PARASOL comfort modules are available in three basic variants:
Variant A: Primary air and water-based cooling from a coil (2 pipes)
Variant B: Primary air and water-based cooling and heating from the coil (4 pipes)
Variant C: Primary air only utilizing the PARASOL’s 4-way diffuser to mix additional ventilation air into space.
Swegon PARASOL comfort modules have 4-way air discharge airflow with induction function. PARASOL comfort modules are active type using the primary air to induce room air through a coil to heat or cool the space without the need for fans. This delivers very quiet operation and minimal maintenance requirements. Unlike a 2-way air discharge chilled beam, air distribution to the room occurs from all 4 sides of the unit providing excellent mixing to all parts of the room. This ensures comfort level throughout the occupied zone. The PARASOL comfort modules are designed for dry systems, i.e. without condensation and therefore do not require any condensate drainage system or any filter. The minimum number of moving parts and lack of filter guarantees very little need for maintenance.
The PARASOL comfort modules are also optimized to quickly mix the discharge air with room air providing better comfort in the room. In heating applications, this technique can be advantageously utilized to efficiently provide heat from the ceiling. The PARASOL comfort modules are available in three basic variants:
Variant A: Primary air and water-based cooling from a coil (2 pipes)
Variant B: Primary air and water-based cooling and heating from the coil (4 pipes)
Variant C: Primary air only utilizing the PARASOL’s 4-way diffuser to mix additional ventilation air into space.
The PARASOL comfort modules operate according to the induction principle. Primary air (A) from the air handling unit provides PARASOL with supply air via a supply air duct and builds up positive pressure in the unit’s plenum. The supply air is forced out at high speed through nozzles (PARASOL Classic) or small slots (PARASOL Zenith). The high speed means that the surrounding air is drawn in and mixed with supply air, which generates negative pressure above the unit’s integrated heat exchanger (C). Room air (D) is continuously drawn up from the room through the water-based heat exchanger where, if necessary, it is cooled or heated before it mixes with the supply air.
The mixed air is then distributed to the room via aerodynamically designed outlets. The outlets are designed to ensure that the distributed air follows the suspended ceiling by utilizing the Coanda Effect (E). The supplied air is then mixed with additional room air, which further lowers the air velocity and reduces the temperature difference before it reaches the occupied zone.
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Active chilled beams utilize the induction process to cause room air to pass through the chilled beam to heat and cool the air and create a comfortable environment.
PARASOL Classic Nozzles
The unique built-in nozzle control in the PARASOL classic means that each of the four sides can be set individually. Depending on the unit’s location and the room’s primary air requirement, the primary air can be guided in all the desired direction. The direction of the airflow can be easily optimized using the Swegon ProSelect Sizing Program.
All units are preset to the same nozzle setting on all four sides. The airflow direction can be easily commissioned when installing the unit. This provides logistic advantages since the installer does not have to take specific room markings into account.
Each nozzle setting has a specific k-factor. There are four nozzle ranges (LF, MF, HF and PF) and each range has three nozzle settings.
A total k-factor for the unit can be determined by adding together the k-factors for the nozzle settings on each side. The relevant k-factor for an optimized nozzle setting can also be obtained in ProSelect.
Optimizing nozzle settings can be preset in the factory or field changed.
PARASOL Zenith provides unique advantages with its slot control and through this a large working range on the airside. PARASOL Zenith is designed to handle a large airflow range in one model. This gives benefits such as easy sizing and a straightforward product upgrade path. PARASOL Zenith can be easily set to the required k-factor with the help of the knob located on the short side opposite the short side with water connections. A special strip can be field added to block off one of the sides if required.
PARASOL Zenith Nozzles
PARASOL Zenith Nozzle Adjustment Knob
ADC in PARASOL Zenith
Both PARASOL classic and Zenith include ADC as standard. ADC enables the diffusion pattern of the air being distributed to be set to avoid the risk of draught. ADC can also be used to reduce the throw length. By setting ADC to L-shape, the distance between two units can be reduced to a minimum and still ensure a good comfort level.
A number of ADC sections with nine air deflections per section are arranged on each side of the unit. Each section is adjustable from a straight setting to 40-degree air deflection to the right or left in increments of 10 degrees. This provides great flexibility and can be adjusted without having to affect the system as a whole.
The direction of the air can be easily adjusted and gives future-proofing, offering a simple measure on location for any change to the furnishings and layout. The ADC does not affect the sound level or static pressure at all
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Delivering a comfortable environment is more than just heating and cooling the space, it requires well distributed air. Swegon Anti Draught Control (ADC) helps change air flow patterns for the best comfort level.
PARASOL Comfort Module Adjusts to Meet Changing Space Requirements
The return air grille on the PARASOL can be easily released to allow access to the coil for inspection and cleaning. The grille is secured to the beam with a cable for added protection.
PARASOL Coil Access
Custom hole patterns in the grilles are available with PARASOL comfort modules. A range of standard colors is also available for PARASOL comfort modules For more information Contact Swegon or your local sales office.
PARASOL Custom Return Air Grilles
PARASOL comfort modules are available in multiple colors
The Swegon PARASOL Classic and Parasol Zenith are Eurovent certified, which is your guarantee that all specified data has been confirmed by tests and has been validated. This includes data provided in Swegon’s selection software, Proselect Web. Click here to learn more about Chilled Beam Certification.
In Addition, the PARASOL Classic and Zenith comfort modules are certified by Intertek to UL 1995- Heating and Cooling equipment and CAN/CSA C22.2
The PARASOL comfort modules are designed for use in most T-bar ceiling systems and clip-in ceilings in terms of length and width. PARASOL is a good fit in standard suspended ceiling grids. In addition, there is a mounting frame for drywall ceilings.
PARASOL classic chilled beams
PARASOL Chilled Beam installed in Drywall Ceiling
PARASOL Classic can be fabricated with EX casing for suspended installation in open ceilings. The EX casing has an integrated coanda wing for proper mixing of room and supply air. Casing covers with the same finish are available to cover the primary air duct and water lines.
PARASOL classic EX Comfort Module
PARASOL EX Flow Pattern
PARASOL EX Flow Pattern
For PARASOL Zenith and PARASOL Zenith DCV, beam casings can be built with finished painted casing and coanda wings for open ceiling applications.
PARASOL Zenith with Coanda Wings
For applications with elevated hygiene demands such as labs and healthcare, the PARASOL comfort module can come with an optional drop coil so both sides of the coil can be accessed for cleaning. The water connections are not interrupted.
PARASOL Zenith with optional drop coil
PARASOL Classic 2×2 and 2×4 Comfort Modules
PARASOL classic is supplied as standard with an open air connection on the right-hand side (seen from the side where the water is connected). The air connection piece is supplied and must be installed so that it can be connected to the primary air duct. A cap is fitted at the factory to the left-hand air connection, but the connections can easily be switched if the air connection inlet has to be fitted to the left.
Parasol classic air connection piece
PARASOL Zenith and Zenith DCV are equipped with alternative air connections to simplify the duct installation and reduce the number of duct bends which save installation time and material cost while the pressure drop and noise generation are also reduced. Air connection can be on either long sides or one of the short sides.
PARASOL Zenith installation example: air connection on the short side of the beams for straight air connection on site.
When ordering, depending on the length, it is possible to choose connection side 1, 2, 3 or 4 as set out in the table below
PARASOL Zenith alternative air connections (view from above)
Position 1 = Short side connection
Position 2 and 4 – Long side connection.
The PARASOL Zenith product can be used in either a constant volume or Demand Control Ventilation (DCV) primary air system. Demand Control Ventilation means the primary airflow can be varied (Variable Air Volume or VAV) offering many advantages over constant volume systems including energy savings, improved thermal comfort without sacrificing IAQ and the ability to apply diversity to the primary air system design to reduce capital cost. For more information on Demand Control Ventilation (DCV) chilled beam design click here.
To convert the PARASOL Zenith comfort module from constant volume to DCV the K factor adjustment knob is replaced with an actuator. This can be done at the time of order or after the product has been installed allowing the future option of converting to a DCV system.
PARASOL Zenith with Manual K factor Adjustment Knob
PARASOL Zenith with K factor Adjustment Actuator (DCV)
The PARASOL DCV comfort module is designed for easy integration with any BMS system. The BMS system typically has one zone controller per control zone. A control zone may be a single office space with one comfort module or a larger areas such as a classroom with multiple comfort modules. The Zone controller will have sensors (temperature, CO2, humidity etc.) monitoring the space and will operate one or all comfort modules in unison to meet the space requirements. The actuator requires 24 VAC and accepts a 0-10Vdc signal from the BMS system. The power supply and 0-10Vdc signal are wired to a terminal strip to simplify connections for the BMS contractor.
Multiple PARASOL VAV Comfort Module with Field Mounted BMS Zone Controller
Increasing the voltage signal will open the nozzles and allow more primary air to pass through the comfort module. Being able to vary the primary airflow, chilled water flow and hot water flow to a control zone offers the maximum flexibility to deliver the best IEQ at the lowest energy cost. The primary airflow is typically varied to meet the most demanding requirement for:
When DCV chilled beams are used, the primary air system will be variable air flow. The fans in the primary air handling unit will be variable and typically controlled by duct static pressure. When there is lower demand in the building and the DCV chilled beams reduce the primary airflow requirement, the primary air handling unit will also reduce the flow offering significant energy savings through the year.
React M Airflow Sensor
Varying the primary airflow rate also means that the inlet static pressure to the chilled beams will change throughout the day. To provide stable air flow to a control zone, Swegon offers the React M primary airflow sensor that can be used to measure the airflow entering the control zone. It can be used for a small zone with a single comfort module or a large space with multiple comfort modules. The React M sensor is available for rectangular and round ducts.
Multiple PARASOL VAV Comfort Modules in a Control Zone
The React M sensor is connected to the BMS zone controller allowing the sensor to measure the primary air entering the control zone. The BMS can then open or close the Comfort Module nozzles to maintain a constant primary airflow regardless of main duct static pressure. This delivers true independent control to the space.
Recommended limit values | PARASOL Classic, PARASOL Zenith & PARASOL Zenith DCV |
Pressure Levels | |
Max recommended coil operating pressure : | 230 PSI |
Max. recommended coil test Pressure: | 350 PSI |
Water flow (ensures evacuation of any air pockets in the system) | |
Min. cooling water flow: | 0.475 GPM |
Min. heating water flow: | 0.206 GPM |
Temperature differentials | |
Chilled Water Delta T | 3.6 – 9 degree F |
Hot Water Delta T | 7.2 – 18 degree F |
PARASOL chilled beam performance can be calculated using Swegon’s Proselect Software. The Swegon application team can assist with your chilled beam applications ranging from selections to full system design review with our DesignEdge service. The following are recommended operating ranges for PARASOL chilled beam selections.
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Web-based software for easy dimensioning and selection of room products: induction units, air diffusers, displacement units and products for demand-controlled ventilation.
Recommended limit values | PARASOL Classic, PARASOL Zenith & PARASOL Zenith DCV |
Pressure Levels | |
Max recommended coil operating pressure : | 230 PSI |
Max. recommended coil test Pressure: | 350 PSI
|
Water flow (ensures evacuation of any air pockets in the system) | |
Min. cooling water flow: | 0.475 GPM |
Min. heating water flow: | 0.206 GPM
|
Temperature differentials | |
Chilled Water Delta T | 3.6 – 9 degree F |
Hot Water Delta T | 7.2 – 18 degree F |
Parasol Classic Installation
The PARASOL Classic and Zenith are designed for installation flush-mounted in the majority of false ceilings available in the market.
T-section grid systems with IP units (NA)
T-section grid systems with 600 mm c-c and gypsum ceiling
T-section grid systems with 625 mm c-c and gypsum ceiling
T-section grid systems with 650 mm c-c and gypsum ceiling
T-section grid systems with 675 mm c-c and gypsum ceiling
Clip in ceiling / sheet metal modules 600 c-c mm
Clip in ceiling / sheet metal modules 625 c-c mm
PARASOL Suspended by Cables
The PARASOL climate module is supplied with four mounting brackets and self-tapping screws for each unit. The mounting brackets are field installed in the corners. The pre-punched holes in each mounting bracket simplify the fastening work. The mounting brackets are designed to be turned in any optional direction depending on the type of suspension system selected. Turned inward, the mounting brackets offer simple installation by means of mounting strips. Turned outward, the mounting brackets work at their best for suspending the beams by means of threaded rods. Cable suspension is also a common means to suspend chilled beams.
PARASOL Drywall Ceiling Frame
A drywall plaster flange kit is available for installing PARASOL comfort modules in a drywall ceiling. The kit snaps to the module hiding the plaster edge and providing a clean, finished look.
PARASOL Classic 2×2 Air Connections
PARASOL Classic 2×4 Air Connections
The PARASOL Classic comfort module can have the air connection on either the right or left side as seen from the water connection end. This can be changed in the field. The air connection size is 5 inch diamter for LF, MF and HF and 6 inch for PF.
PARASOL Classic 2×2 Water Connections
PARASOL Classic 2×4 Water Connections
The PARASOL Classic water connections have 12 mm copper tubing connected to a 1/2 NPT threaded fitting. The coil can be either 2 pipe or 4 pipe as required. Stainless steel flex hoses are available to quickly connected the comfort module to the building heating and cooling systems.
The PARASOL Zenith air connections can be on any of the 4 sides for simpler field installation. The connection location can be changed between L1 (water connection end), L2 and L4. It is not possible to change the connection location if L3 (opposite water connections) is selected. The connection size is 5”, 6” or 8” round depending on the beam size.
PARASOL Zenith Air Connections
PARASOL Zenith Water Connections
The PARASOL Zenith water connections have 12 mm copper tubing connected to a push on 1/2 NPT threaded fitting. The coil can be either 2 pipe or 4 pipe as required. Stainless steel flex hoses are available to quickly connected the comfort module to the building heating and cooling systems. The hoses include a 12 mm push on connection for the comfort module end and either 1/2 NPT, compression or 1/2 inch push on connection for the building side.
PARASOL Zenith Quick Bracket
Swegon offers an additional installation method for Zenith to help reduce installation labor and ease comfort module installation. The Quick Bracket comes in a pair per comfort module. The comfort module will click into the bracket without the need for tools. further adjustment allows the module to be quickly adjusted to align with the suspended ceiling system. Parasol Zenith’s unique shape allows it to be installed through most ceiling systems without the need to remove the grid thus saving valuable time and cost.
Parasol Zenith Installation
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Active Chilled Beam Cross Section
An active chilled beam is basically a cabinet with a water coil. There are no moving parts such as a fan and motor (i.e. fancoil). To get air in the space to pass through the coil, the induction principle is applied using primary air from a main air handling unit. The room air is “induced” to pass through the coil by creating a low pressure zone above the coil. As air passes through the coil, it can be heated or cooled using hot or chilled water. The induced air and the primary air mixed and delivered to the room via diffusers that are designed into the chilled beam to optimize mixing and take advantage of the coanda effect.
Induction Ratio
The ratio of induced air to primary air is the Induction Ratio. For example, if 1 cfm of primary air induces 3 cfm or room air to pass through the coil, the induction ratio would be 3 to 1 and 4 cfm would be delivered through the diffuser to the space.
Induction Process
The reason the induction process works can be seen in Bernoulli’s principle.
Said in words, if you increase the kinetic energy (the speed) of a fluid then its pressure must go down. In a chilled beam, the primary air passes through a nozzle bank and its speed increases, thus its pressure goes down and low pressure area is created downstream of the nozzle bank (above the coil).
This principle is how perfume atomizers and carburetors work, why sail boats can sail into the wind and of course, why airplanes fly.
To get room air to pass through a coil, work is being done and energy used. In a fancoil, the energy is electricity that the fan motor consumes to operate the fan. In a chilled beam the energy source is the primary air handling unit. The primary air must be delivered to the chilled beam and overcome the pressure drop of the nozzle bank. The nozzle bank requires more external static pressure at the air handling unit. Typically the fans and motors in air handling units are much more efficiency that mall fans and motors used in terminal products.
One way to look at the energy usage in a chilled beam is to consider the air flow rate (cfm) as equal to electrical current and the pressure drop of the nozzle bank as equal to voltage. Some combination of airflow are and pressure drop (i.e. voltage and current) will provide the necessary energy to draw room air through the coil.
Modern chilled beam design has advanced to the point where the pressure drop across the nozzle bank is less than a 0.25 inches w.c. and typically around 0.5 inches w.c. for the whole chilled beam (which includes the diffuser components.)
Induction Process in Swegon PACIFIC Chilled Beam
Induction Process in Swegon PARASOL Chilled Beam
Chilled Beam Slot Nozzle
Chilled Beam Round Nozzle
Nozzles come in all sorts of shapes and sizes. A orifice plate is a nozzle. Nozzle design in chilled beams has evolved to create the best induction result with the lowest pressure drop and noise level.
Nozzle selection is based a specific operating conditions and is very sensitive to changes in the design conditions. As primary air passes through a small opening it accelerates. In a very complicated fluid dynamics process, the shape of the jet profile, plenum geometry, jet velocity and other properties will create a low-pressure area I the plenum that will cause room air to be drawn into the plenum via the coil and then pass out through the diffuser slots back to the room.
If the building design requires a small amount of primary air (i.e. “low current”) then the chilled beam selection will use small nozzles to induce more room air but requiring a larger pressure drop (i.e. “high voltage”) to get enough room air to pass through the coil to meet the cooling and heating demands. In short, the induction ratio will go up.
Nozzle K Factor
Changing the nozzle size and properties is known as changing the k factor. k factors are listed on the chilled beam printouts and can be used by the balancing contractor to measure the amount of primary air entering the chilled beam.
Where
q = (primary) airflow in cfm or l/s
K = k factor (note the k factor has a different value for SI or IP units)
P = the pressure drop across the nozzle bank in Pa or inches w.c.
If the chilled beam is manufactured with a fixed nozzle size (fixed k factor), then any changes in the design conditions in the future will be very limited. For example if the space ventilation rate, cooling or heating loads change appreciably, adjustments in the beam performance will be very restricted to the point where the beam may need to be replaced.
Adjustable Nozzles
Adjustable nozzles solve this issue by allowing the nozzle design to changed as the needs of the space evolve. You can change the K factor in the field. Adjustable nozzles must be built into the product at time of manufacture. Most nozzle adjustments can be achieved by hand or with hand tools.
Modulating Nozzles
The ultimate form of adjustability is a Demand Control Ventilation or VAV chilled beam where the nozzle adjustment is motorized and varies based on the amount of primary air entering the chilled beam. DCV chilled beams have variable k factors than maintain the induction process over a large primary airflow rate. As the primary airflow rate is reduced to save energy, the k factor changes and the induction process continues allowing space control. Click here to learn more Chilled Beam Design.
Swegon Test Lab set up to check air distribution mimicking computer and occupant heat sources
Chilled beams not only provide heating, cooling and ventilation air, they are the air distribution component that delivers good thermal comfort. Being able to adjust the airflow pattern from the chilled beams is critical to delivering optimal occupant comfort. As the building use evolves (re-purposing) the space loads and layouts change often requiring air pattern adjustments to maintain thermal comfort.
ADC in Swegon PARASOL Chilled Beam
To achieve air pattern control Swegon chilled beams can adjust the airflow pattern by means of Anti Draught Control (ADC). ADC consists of a number of sections with adjustable fins arranged in the outlet of the unit with a simple grip of the hand, the fins can be set to an appropriate angle in 10 degree increments to direct the discharge air and in this way create the desired air distribution pattern.
ADC in PACIFIC Chilled Beam
ADC in ADRIATIC Chilled Beam
ADC in PARAGON Chilled Beam
The ADCs are adjusted to spread the primary and induced airflow evenly in all directions across the ceiling for maximum even air distribution.
The ADCs deliver an X pattern airflow that avoids the airflows from to adjacent beams running into each other and breaking away from the ceiling resulting in “dumping”. The X pattern allows more chilled beams in the ceiling for increased cooling capacity (i.e. a computer classroom) without compromising thermal comfort.
The ADC biases the airflow pattern in one direction to increase throw and focus cooling or heating capacity yin a particular part of the room such as an exterior wall. Alternatively, if the space is repurposed and a new partition is built near the chilled beam, the airflow pattern can be directed away from the partition avoiding relocating the chilled beam.