A chilled beam is a type of convection heating, ventilation and air conditioning (HVAC) system designed to heat or cool large buildings.It is now regarded as the most space efficient and environmental friendly method of heating and cooling a building.The primary advantage of the chilled beam system is its lower operating cost.Chilled beams reduce energy consumption.It is now regarded as the most space efficient and environmental friendly method of heating and cooling a building.It improves the comfort levels by cutting out the intrusive noise and aesthetic problems.It provides good energy efficiency and reduction in carbon dioxide emission. Since they do not require high forced air flows, chilled beam systems also require reduced air distribution duct network.

1. CHILLED BEAM
GUIDED BY:
Ms. Meera G Mohan
Assistant Professor(Civil)
SBCE
PRESENTED BY:
Neelima Suresh J
Roll No : 39
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2. OVERVIEW
 Introduction
 Literature review
 Components of chilled beam
 Types of chilled beam
 Advantages of chilled beam
 Disadvantages of chilled beam
 Case study 1
 Case study 2
 Conclusion
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3. INTRODUCTION
 A chilled beam is a type of convection HVAC system
designed to heat or cool large buildings
 Developed in Norway in 1975
 Emerging technology in the U.S. as an alternative to
conventional systems such as VAV
 Primarily used in locations where the humidity can be
controlled
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4. LITERATURE REVIEW
SL
NO.
TITLE AUTHOR, YEAR CONTRIBUTION
1 Chilled Beams Selection
Dan int-hout and
W.Lilli , 2014
Describes the process
for selecting chilled
beams.
2
Applying chilled beams to
reduce building total carbon
footprint
Tim Dwyer, 2014
Applications of chilled
beams for energy and
carbon reduction
3
Chilled Beams Performance
Research
John Tomkin,2013
Analysed the
performance of hvac
system.
4
Chilled beam study claims
potential for 20 per cent
energy savings over fan coils
Andrew Gaved,2013
Shows a major energy
benefit for the
technology against
other systems
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5. COMPONENTS OF CHILLED BEAM
1) Air handling units
 Major component within any chilled beam or chilled ceiling
system
 Role - to clean and condition the air as it enters the building
 Distribute it through the terminal devices
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6. 2) Mixing boxes
 Dampers are used in mixing boxes to regulate the mixture
of fresh air and re-circulated air
3) Coils
 Heat exchangers designed to transfer the energy from a
medium (usually water) to the air
 Individual coils for heating and cooling
6
COMPONENTS OF CHILLED BEAM
(contd..)

7. TYPES OF CHILLED BEAMS
 Active chilled beams
 Passive chilled beams
 Multi purpose chilled beams
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8. ACTIVE CHILLED BEAMS
 Have ductwork supplied to them
 Through duct work specific amount of primary air is
provided to the pressurized plenum within the device
 The air is discharged through induction nozzles
 Mix with entrained air, and ventilate the room
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Fig.1 Active chilled beam
(Source: John Murphy -understanding Chilled Beam Systems,2012)

10. OPERATION OF ACTIVE CHILLED
BEAM
 Fresh air from the air handler via duct work is supplied
into the pressure chamber
 Pressure in the chamber causes the air to rush out
through the nozzles at a high velocity into the mixing
chamber
 Due to nature of the nozzles, a low pressure system is
created above the coil
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11.  Inducing more air through the coil into the mixing
chamber
 Conditioned air from the space mixes with the fresh air
 Supplied back into the room through linear slots located
along the casing of the beam
 The air gets supplied back to the space through the
linear slots at a higher velocity and at its coldest state
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OPERATION OF ACTIVE CHILLED
BEAM (contd…)

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Fig .2. Gordon House renovated using chilled beam
(Source: claremoorearchitect.blogspot)

13. PASSIVE CHILLED BEAMS
 Chilled beams work using natural convection
 Good air circulation is essential for the operation of
passive chilled beams
 Good solution to provide sensible cooling in labs or
other spaces where processes generate high heat
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Fig.3 Passive chilled beam
(Source: John Murphy -understanding Chilled Beam Systems,2012)

15. OPERATION OF PASSIVE CHILLED
BEAM
 Arranged at regular intervals along the ceiling plane
to provide uniform cooling to the occupied space
below
 Consists of a fin-and-tube heat exchanger, contained
in a housing , that is suspended from the ceiling
 Chilled water passes through the tubes
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16.  Warm air from the space rises toward the ceiling
 The air surrounding the chilled beam is cooled
 It descend back toward the floor
 This allows a passive chilled beam to provide space
cooling without the use of a fan
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OPERATION OF PASSIVE CHILLED
BEAM (contd…)

17. Fig .4 Peabody Hall renovated with passive chilled beam
(Source: Chilled beams maintain comfort, look of historic hall-
SEMCO)
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18. MULTI-SERVICE CHILLED BEAMS
 Comes in both passive and active types
 Incorporate other building systems into the beam in a
prefabricated unit
 This prefabricated unit can be brought to the project site
 Reduces the amount of time required to install all the
building systems
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19. MULTI-SERVICE CHILLED BEAMS
(Contd…)
 Light fixtures and controls, speakers, occupancy sensors,
smoke detectors, and even fire sprinklers can be incorporated
into the beam
 The site delivery can be regulated to site requirements
 Reduces the total amount of space required for onsite storage
 Enables rapid installation and services connections with a
major saving in onsite time
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20. 20
Fig.5 Multiservice chilled beam
(Source: An Introduction to Chilled Beams and Ceilings,2012)

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Fig.6. Multiservice chilled beam
(Source: An Introduction to Chilled Beams and Ceilings,2012)

22. ADVANTAGES OF CHILLED BEAM
 Quieter than air based HVAC systems due to the lack of
moving parts and slower air velocities
 Maintenance is also reduced due to the lack of moving
parts
 High indoor air quality resulting from air recirculated
within the zone versus mixed air from other zones
 Lower energy consumption
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23.  Space savings resulting from reduced ductwork size
 This air conditioning unit provides excellent thermal
comfort with good energy efficiency
 Lower operation costs throughout the lifecycle of the
building
23
ADVANTAGES OF CHILLED BEAM
(Contd…)

24. DISADVANTAGES OF CHILLED BEAM
 Initial cost of chilled beams is typically higher than
when compared to other all air systems
 Chilled beams require more ceiling area than diffusers
of a conventional system
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25. CASE STUDY 1
RENOVATION OF AN INDUCTION SYSTEM
WITH ACTIVE CHILLED BEAMS
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26. CASE STUDY 1(contd…)
 250 S. Wacker in Chicago is a multi-tenant 15 story
office tower
 The first and top floors had dedicated HVAC systems
separate from the system serving the 2nd through 14th
floors
 These intermediate floors had a floor-mounted induction
perimeter system and a constant volume-variable
temperature interior system
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27. CASE STUDY 1(contd…)
 The existing induction units and enclosures would have
to be replaced as they were at the end of their useful life
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Fig.7. 250 S. Wacker chicago
(Source: Renovation of an induction system with active chilled beams,
air/pro associates)

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COMPARISON
Perimeter System Existing Induction Active Chilled Beam
Design Cooling Load
262 tons
(382 sq. ft./ton)
156 tons
(641 sq. ft./ton)
Primary Airflow
from Central AHUs
47,135 CFM
(0.47 CFM/sq. ft.)
31,760 CFM
(0.32 CFM/sq. ft.)
Fan Energy at
100% of Design
64 kW 22 kW
Pump Energy 28 kW 12 kW
Table 1. Comparison before and after renovation

29. CASE STUDY 2
UC DAVIS SEGUNDO STUDENT SERVICES
CENTER
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30. CASE STUDY 2(contd…)
 It is a new 34,500 square foot community center/
administrative center
 Located within the Segundo Precinct of the University of
California – Davis campus
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31. CASE STUDY 2(contd…)
ENERGY EFFICIENCY
 The project was able to achieve 42.3% energy savings
 Heat recovery and direct evaporative cooling systems
on the main air handling unit
 Chilled beam-VAV system: AHU was used to provide
primary air to the chilled beams for the perimeter
spaces
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32. CASE STUDY 2(contd…)
ENERGY EFFICIENCY (contd…)
 Demand control ventilation strategy which was possible
by having a VAV box upstream of the chilled beams
 High performance glazing systems with integrated
shading systems
 Thermally broken insulating wall system
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33. CASE STUDY 2(contd…)
 INDOOR AIR QUALITY
 The chilled beam system operates close to the outdoor air
requirements for occupancy
 This allowed the design to be based on 100% outside air
 The internal spaces had their cooling airflows close to the
outdoor air requirement which allowed them to be fed from
the same unit
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34. CASE STUDY 2(contd…)
 COST EFFECTIVENESS
 The energy efficiency measures and innovative systems
selected proved to be very cost effective
 ENVIRONMENTAL IMPACT
 The Segundo Service Center was able to reduce invasive
piping and energy consumption
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35. CASE STUDY 2(contd…)
 ENVIRONMENTAL IMPACT (contd..)
 The building was able to achieve an annual CO2
reduction of 241.8 metric tons
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Fig.8. Uc davis segundo student services centre
(Source: Case study on uc davis segundo student services center, guttmann
and blaevoet)

37. CONCLUSION
 Chilled beams remove large amounts of sensible heat
 Active chilled beam reduces primary air flow requirement
 The lifecycle cost of chilled beam system is lower than in
other cooling systems
 The energy consumption of beam system is low
 The chilled beam system reduces carbon dioxide emission
to a greater extent
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38. REFERENCES
 Chilled Beam System Market by Design (Active, Passive, &
Multi-Service) worth $406.8 Million by 2020, digital journal,
June 2015.
 Dan int-hout and W.Lilli , Chilled Beams Selection, ASHRAE
Journal, November 2014, Vol. 56 Issue 11, page58.
 Chilled Beams Performance Research- Ceiling the Deal, CIBSE
Journal, November 2013, page 21.
 CBCA article on An Introduction to Chilled Beams and
Ceilings, RAC Journal February2013, page 16.
 Chilled beam study claims potential for 20% energy savings
over fan coils - RAC Journal, Augest2013
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