Principles and Benefits of Multiservice Chilled Beams

Frenger supplies, manufactures and installs multiservice chilled beams (MSCB's). These integrated building service units provide flexible space conditioning that can be tailored in terms of appearance and the services provided, in order to meet specific requirements. In this way they help to create attractive, comfortable and productive working environments.

A full range of building services can be incorporated within an multiservice chilled beam, including:

 

  • heating & cooling
  • fresh air supply
  • uplighting, downlighting and emergency lighting
  • fully addressable lighting solution (DALI)
  • PIR, Photocells etc
  • BMS sensors, control valves & condensation detectors
  • fire alarms and sprinkler heads
  • acoustic insulation
  • pipework, ductwork & compartmental trunking


Bringing several services together in a single integrated MSCB unit means that the physical dimensions of the unit can be optimised; to enable use in spaces where the floor-to-slab height is minimal. The concept also provides the specified with a single source of responsibility for the design, supply and integration of all services, ensuring reduced costs and on-site installation time.

Operations

Active MSCB Installation

The cooling unit is integrated into a perforated architectural casing with central or side-mounted lighting, and the MSCB is tested and delivered to site for mechanical and electronic connection (often "Plug & Play").


Where there is a need to use the MSCB to deliver fresh air into the space, then Frenger's Active range of chilled beams will form the basis for the company's active MSCB's. Active chilled MSCB's utilise the delivery of supply air to induce warmer recirculated room air through the unit's cooling battery. The technology employed in Frenger's active chilled beams 

ensures high cooling capacity even with minimal supply air volumes, coupled with a quiet and controlled delivery of air for optimal comfort.

 

Passive MSCB Installation

Active MSCB's are designed for simple installation; electrical, water and air connections can be inter-linked from unit to unit ("Plug & Play") to reduce on-site time to a minimal.

Frenger's passive MSCB utilises the company's Passive beam range to provide comfortable cooling through a combination of convective and radiant heat transfer processes; warm room air is cooled through contact with the chilled beam and diffused into the space through the perforated underplate, the beam casing is also cooled via radiant exchange and this cooling is then directed to the warmer occupants. This type of passive cooling provides the best possible combination of high cooling capacity and exception levels of occupancy comfort with minimal maintenance.

 

Finish and appearence

MSCB's offer an alternative to the monolithic ceilings that have become commonplace in office developments, providing attractive yet extremely functional building services installations. The appearance of each beam can be customised in terms of shape, dimensions, colour and perforation pattern to meet the client's particular preferences.

 

Technical support

  • Frenger can draw upon many years experience in the design and manufacture of cooling systems which combine the highest levels of occupancy comfort with class-leading design, and offers clients a range of support services.
  • climate simulations to predict comfort levels
  • full lighting design including light level calculations and luminaire development to LG3 or LG7 requirements
  • "Fly-through" graphical animations for building operations
  • CAD drafting and 3D rendering of MSCB's in the environment
  • full climatic testing in the company's BSRIA calibrated testing facility in Derby
  • return air temperature sensors guidance
  • integrated control valves guidance

 

Benefits of MSCB's

  • ideal where floor-to-slab heights is minimal
  • low running costs with minimal maintenance requirements
  • integration of several services in a single unit reduces cost and overall installation programme period
  • high cooling/heating capacities
  • low noise and draft risk makes for high comfort levels
  • beam aesthetics can be customised to client requirements
  • single point of responsibility for the design, integration, manufacture and testing of all services, plus Frenger's installation as an option taking the project from concept to completion.

 

Frenger's unique benefits

  • "in-house" lighting design and luminaire development
  • patented design active MSCB's deliver high cooling capacities with minimal supply air velocities
  • considerable experience in the design, supply and installation of both types of MSCB and associated service bulkheads
  • in house testing facility large enough to test the most complex MSCB installation

 


 

Active Multiservice Chilled Beams

 

Compact

 

Description

 

The Frenger compact unit is a slim line active chilled beam that uses a supply of fresh ventilation air to draw warm room air to the unit’s cooling battery. This warmer room air is cooled as it passes through the finned tube cooling batteries, which comprise aluminium fins with copper channels through which cool water passes. The heat of the room is taken in through the aluminium fins, and transferred into the water circuit through the copper tube and on to a central chiller.

The unit is able to induce and condition 4-5 times as much room air as fresh air supplies. Conditioned air is then quietly reintroduced into the room, entraining to the ceiling rather than being dumped directly below the beam, thanks to patented nozzle and air chamber design that produce a coanda effect-even with as little as 3.0 l/s/m2.

 

    • Cooling
    • Fresh air
    • Air supply rate up to 30l/s/m per unit.
    • All recirculated air is contained within the product casing

 

Optional features

 

  • Heating
  • Integrated lighting
  • Integrated control valves

 

Dimensions

Length: Modules from 1.2m up to 3.6m

Width: 592mm

 

Connection

Water: Horizontal or vertical, same end or opposite.

 

Performance

Watts per meter total cooling (based on 10dTK and 26ltrs/sec/m for a 1.8m long beam, supplied at 16°C with a 100pa).

 

Maintenance

The unit has no moving parts and therefore maintenance requirement is limited to periodic cleaning of the finned tube batteries. All sides of the batteries can be accessed from below via the removable perforated faceplate.

 

Installation

Beams are designed to be supported by 2 or 3 sets of threaded rod hangers, dependent on product length.

 

MSCB typical details, Air movement

MSCB Fan Shaped Distribution

The Frenger active chilled beam uses the supply of ventilation air to draw warmer room air up and across the unit’s cooling battery. The image above illustrates the air movement pattern and cooling mode.

Conditioned air is then quietly re-introduced into the space, entertaining to the side profiles of the multiservice chilled beam rather than being dumped directly below the beam, thanks to the patent pending built nozzle strip and air chamber design that developed a Coanda effect at the air discharge point. The nozzle technology also allows the company to determine and factory-set the airflow dispersion characteristics of each unit.

 

Compact MSCB Design Examples

Compact Multiservice Chilled Beams can be designed to fit with a wide variety of bespoke architectural design aesthetics. Below are a few examples of how Compact MSCBs can be tailored specifically for a project:

 

Example A - Curved Underplate and Aluminum Lighting Louvers

Compact MSCB Project with Lighting LouversCompact MSCB Graphic with Lighting Louvers

 

 

Example B - Flat Underplate and Continuous Lighting Diffusers

Compact MSCB Project with Continuous LightingCompact MSCB Graphic with Continuous Lighting

 

 

Example C - Indirect Only Lighting

Compact MSCB Project with Indirect Only LightingCompact MSCB Graphic with Indirect Only Lighting

 


 

 

Ultima

Description

The Frenger Ultima unit is an active chilled beam that uses a supply of fresh ventilation to draw warm room air to unit’s vertically mounted cooling batteries. The warmer room air is cooled as it passes through the finned tube cooling batteries, which comprises aluminium fins with copper channels through which cool water passes. The heat of the room is taken in through the aluminium fins, and transferred into the water circuit through the copper tube and onto a central chiller.

The unit is able to induce and condition 4-5 times as much room air as fresh air supplies. Conditioned air is then quietly reintroduced into the room, entraining to the ceiling rather than being dumped directly below the beam, thanks to patented nozzle and air chamber design that produce a coanda effect even with as little as 3.4 l/s/m.

 

  • Cooling
  • Fresh air
  • Air supply rate upto 80l/s per unit
  • All recirculated air is contained within the product casing


Optional features

  • Heating
  • Integrated Lighting
  • Condensation sensors
  • Integrated control valves


Dimensions

Length:

Modules from 1.2m up to 3.6m

Width :

592mm

Connection posibilities

Water:

Horizontal or vertical, same end or opposite.

Air:

Horizontal or vertical or either side for 1x125, horizontal for 2x100.

 

Performance

Ultima Active Multiservice Chilled Beam Project1050 watts per meter total cooling based on 10dTK and 26 Itrs/sec/m for a 2.4m long beam supplied at 16°C with a 100Pa).


Maintenance

The unit has no moving parts, and therefore maintenance requirement is limited to periodic cleaning of the finned tube batteries. All sides of the batteries can be accessed from below via the removable perorated faceplate.


Installation

Beams are designed to be supported by 2 or 3 sets of threaded rod hangers, dependent on product length.

 

Ultima MSCB Design Examples

Ultima Multiservice Chilled Beams can be designed to fit with a wide variety of bespoke architectural design aesthetics. Below are a few examples of how Ultima MSCBs can be tailored specifically for a project:

 

Example A - Angled Underplate and Prismatic Lighting Diffuser

Ultima MSCB Project with Prismatic DiffusersUltima MSCB Graphic with Prismatic Diffusers

 

 

Example B - Curved Underplate and Prismatic Lighting Diffuser

Ultima MSCB Project with Curved UnderplateUltima MSCB Graphic with Curved Underplate

 

 

Example C - Flat Underplate and Angled Lighting Extrusion

Ultima MSCB Project with Angled Lighting ExtrusionUltima MSCB Graphic with Angled Lighting Extrusion

 

 

Example D - Flat Faced Design

Flat Faced Ultima MSCB ProjectFlat Faced Ultima MSCB Graphic

 


 

 Passive Multiservice Chilled Beams 

 

 X-Wing

 

Introduction

Passive MSCB installed in an office buildingFrenger’s X-Wing chilled beam represents the very latest development in passive beam technology. X-Wing employs connective and radiant cooling principles and is designed to deliver high cooling duties (Up to 170 W/m2 when concealed behind S5046 perforated metal ceiling) with no noise and minimal air movement.

X-Wing can be installed above a perforated metal ceiling system or integrated into a multiservice chilled beam. It is ideal for use in high-spec offices where there is a requirement to provide the best possible occupancy comfort levels with minimal environmental impact. X-Wing achieves this whilst integrating into aesthetically stunning ceiling systems or chilled beam casings.

 

Benefits

  • Life expectancy in excess of 30 years
  • No moving parts equates to reduce maintenance cost
  • Capital costs now comparable with more traditional air systems
  • Unobtrusive solution- concealed units
  • Lower running costs than traditional air conditioning systems
  • Environmentally friendly solution
  • High cooling effects (up to 170 W/m2)
  • Small underplate perforations make X-Wing beams invisible inside the MSCB casing
  • Technology proven over 25 years
  • Smooth painted surfaces are simple to clean
  • 50% more cooling with no draft risk
  • Lightweight product, easy to install, uses less material resource
  • Radiant cooling effect delivers higher comfort levels
  • MSCB Optional Features
  • Integrated Lighting
  • Condensation sensors

 Passive MSCB installed in a University

Dimensions

    • Length: Modules from 1.2m up to 4.0m
    • Width: 1200mm max (Assembled unit)

 

Connection posibilities

  • Water: Horizontal, same end or opposite

 

Performance

  • Cooling up to: 370watts per linear meter

 

Maintenance

 

  • The unit has no moving parts, and therefore maintenance requirement is limited to periodic cleaning of the cooling surfaces. All sides of the X-Wing can be accessed from below via the removable perforated faceplate

 

 

Installation

Beams are designed to be supported by 2 to 5 sets of threaded rod hangers, dependent on product length.

The X-Wing chilled beam is of a “Passive” type offering cooling through a natural buoyancy process as well as via radiant exchange. Beam can be positioned above a perforated metal ceiling or integrated into a Multiservice Chilled Beam.

 

X-Wing Chilled Beam installed above a perforated ceiling

 

Passive Chilled Beam Cooling Principles

Cooling Principles

As cold water passes through the chilled beam, the warm room air is cooled against the beams surfaces. This cooled air, which is heavier due to its higher density, then streams through the perforated underplate in the beam and percolates through the small ceiling perforations into the room space below. In this way air is circulated within the room, with warm air from the room being continually replaces by cool air.

Passive Chilled Beam Design Features

The efficiency of the convection proves, couples with the ability of the product to exchange energy by way of long-wave radiation, means that X-Wing retains a high cooling effect even when the air temperature in the room is relatively low (e.g. at night or when the building is unoccupied). In this way large amounts of cold energy can be stored in the building structure during low load periods, and used to offset heat gains when the need arises.

Cooling performance for the chilled beam elements is based on their positioning above the MSCB’s metal slot-perforated underplate (normally 50% open area with 5.0mm holes). Smaller perforation hole sizes and free areas can be used, although there will be a consequent reduction in product cooling capacity.

 

MSCB Typical Arrangement

Passive Multiservice Chilled Beam Typical Arrangement

 

Passive

 

Passive

 

Passive