2
CONTENTS
• INTRODUCTION• TYPES OF CHILLED BEAMS• CASE STUDY• ADVANTAGES AND DISADVANTAGES• CONCLUSIONS• REFERENCES
30/9/2014
330/9/2014
INTRODUCTION
• HVAC system to heat or cool buildings• Pipes of water passed through a heat exchanger• Air around beam chills and denser air falls to the floor• Warmer air moves up • Water can carry more energy than air• A metal pipe of water 1 inch dia can carry same
energy as a 18 by 18 inch metal duct of air
430/9/2014
TYPES OF CHILLED BEAMS
• PASSIVE CHILLED BEAM
• ACTIVE CHILLED BEAM
• MULTI SERVICE CHILLED BEAM
530/9/2014
PASSIVE CHILLED BEAM• Simple device• Natural convection and radiation• Air flow based on temperature difference• Cooling output regulated by flow of chilled water• Not connected to ventilation system
630/9/2014
ACTIVE CHILLED BEAM• Grater cooling capacity• Primary air flow introduced• Control humidity and temperature hence high IAQ• Very quiet operation• High ventilation rate
730/9/2014
MULTI SERVICE CHILLED BEAM• Active or passive type• Integrate services like lighting, speaker systems ,sprinkler heads • Different services can be pre-fabricated off-site• Plug and play connections• Save time and hence cost of project
830/9/2014
CASE STUDY-ASTRA ZENECA,BOSTON
• In operation since 2000• Serve offices, laboratories, cafeteria ,atrium• No condensation issues• Cleaning was rarely required• 100% outside air system provides ventilation • They are planning for a new building using chilled beam
930/9/2014
ADVANTAGES AND DISADVANTAGES
• Simple to design and control• Constant volume supply air system• Almost no maintenance• Minimum cleaning• Reduction in energy use
• Not well known in our Industry• Higher construction cost• Affects traditional ceiling Appearance• Dew point concerns
1030/9/2014
CONLUSIONS
• The initial cost is higher• Construction cost and type of building
decides type of chilled beam to be used• The operating and maintenance cost are
less• Provides high thermal comfort• Suitable for energy efficient and green
buildings • Not well known to our industry• Huge scope in India
1130/9/2014
REFERENCES1. Can Chen, Wenjian cai, Youyi Wang, Chen Lin(2014),Energy and
Buildings: Performance comparison of heat exchangers with different circuitry arrangements for active chilled beam applications, vol.79,pages 164-172
2. Can Chen, Wenjian Cai, Karunakaran Giridharan, Youyi Wang(2014),Applied energy: A hybrid dynamic modeling of active chilled beam terminal unit, volume 128 , pages 133-143
3. ashrae.org4. Trane Engineers Newsletter volume 38–45. www.rehva.eu 6. www.reuters.com 7. www.semcoinc.com8. www.halton.com
12
THANK YOU
30/9/2014
Recommended
