2. OVERVIE
W
2
● 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
3. INTRODUCTION
3
•A chilledbeam is a type of convection
HVACsystem 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
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
4
5. COMPONENTS OF CHILLED BEAM
5
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
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
7
Active chilled beams
Passive chilled beams
Multi purpose chilled beams
8. ACTIVE CHILLED BEAMS
8
⚫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
10. OPERATION OF ACTIVE CHILLED
BEAM
10
● 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
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
11
OPERATION OF ACTIVE CHILLED
BEAM (contd…)
13. PASSIVE CHILLED BEAMS
13
● 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
15. OPERATION OF PASSIVE CHILLED
BEAM
15
⚫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
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
16
OPERATION OF PASSIVE CHILLED
BEAM (contd…)
18. ADVANTAGES OF CHILLED BEAM
18
● 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
19. ● 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
19
ADVANTAGES OF CHILLED BEAM
(Contd…)
20. DISADVANTAGES OF CHILLED BEAM
20
● 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
21. REFERENCES
21
⚫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
22. CONCLUSION
22
⚫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
