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Chilled Beam Presentation Cooling Load Profile Chilled Beam Systems Advantages of Chilled Beam vs VAV Sample Project Photos Summary & Questions.

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Presentation on theme: "Chilled Beam Presentation Cooling Load Profile Chilled Beam Systems Advantages of Chilled Beam vs VAV Sample Project Photos Summary & Questions."— Presentation transcript:

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2 Chilled Beam Presentation

3 Cooling Load Profile Chilled Beam Systems Advantages of Chilled Beam vs VAV Sample Project Photos Summary & Questions

4 Cooling Load Profile

5 Sensible Heat Heat which is measured by a thermometer. No Moisture added to the space. Latent Heat Heat which is measured by a humidistat. Moisture added to the space.

6 Sensible Heat

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8 Latent Heat Sensible Heat

9 Latent Heat Sensible Heat Latent Heat Air Infiltration Sensible Heat And Latent Heat 70% Sensible Heat and 30% Latent Heat

10 Cooling Load Profile

11 Water = Efficient Transport ¾” diameter water pipe 1 Ton of Sensible Cooling (12,000 BTU/HR) Requires 550 CFM of Air or 2.4 GPM of water 10” 12”

12 Air Horse Power vs Water Horse Power

13 Three Types of Chilled Beam Systems Chilled Ceilings (Radiant Chilled Ceilings) Passive Chilled Beams Active Chilled Beams

14 Chilled Ceilings

15 Chilled Ceilings Radiant Effect 76°F Dry Bulb 74°F radiant temperature (dry bulb)

16 Passive Chilled Beams

17 Passive Chilled Beams Operation Principle Perforated tile Water coil Suspension rod Soffit Fabric skirt

18 Passive Chilled Beams Airflow Pattern

19 Active Chilled Beams

20 Active Chilled Beam Operation Principle Suspended ceiling Primary air plenum Primary air nozzles Heat exchanger Induction air flow Primary Air From Energy Recovery Unit 55 Deg F to 65 Deg F 72 Deg F 100 CFM 300 CFM 200 CFM Water Temp 52 Deg F 2 Deg F Above Dew Point Temp

21 Active Chilled Beam Airflow Pattern

22 Active Chilled Beams Benefits Very high cooling capacity –Up to 100 BTUH/FT 2 floor space –Up to 2000 BTUH per LF Integrated cooling, ventilation and heating –All services in the ceiling cavity Suitable for integration into all ceiling types –Reduces ceiling costs compared to Passive Beams

23 Active Chilled Beams Benefits (Continued) Significant space savings –Smaller ductwork saves space in shafts, mechanical rooms and ceilings Can be installed tight up against the slab –Reduced floor to floor heights –Reduced construction costs on new buildings Low noise levels Low maintenance –No moving or consumable parts

24 Energy Savings* Compared to VAV *Table Data Provided by Dadanco

25 LEED Certification LEED NC V3.0 Optimize Energy Performance - up to 48% (new) or 44% (existing) more efficient than ASHRAE 90.1 (EA Credit 1) -up to 19 points Increased Ventilation - 30% more outdoor air than ASHRAE 62 (IEQ Credit 2) - 1 point Controllability of Systems - individual temperature control (IEQ Credit 6.2) - 1 point Thermal Comfort - meet ASHRAE 55 (IEQ Credit 7.1) - 1 point (Minimum 40 points needed for certification out of 100 maximum)

26 Passive Chilled Beams Variants Recessed Passive Beams Exposed Passive Beams

27 Active Chilled Beams

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29 Active Chilled Beam Design Considerations

30 Building Suitability Building Characteristics that favor Active Chilled Beams Zones with moderate-high sensible load densities –Where primary airflows would be significantly higher than needed for ventilation Buildings most affected by space constraints –Hi – rises, existing buildings with induction systems Zones where the acoustical environment is a key design criterion Laboratories where sensible loads are driving airflows as opposed to air change rates Buildings seeking LEED or Green Globes certification

31 Characteristics that less favor Active Chilled Beams Buildings with operable windows or “leaky” construction –Beams with drain pans could be considered Zones with relatively low sensible load densities Zones with relatively low sensible heat ratios and low ventilation air requirements Zones with high filtration requirements for the re- circulated room air Zone with high latent loads Building Suitability

32 Floor heights reduced 10”-14” Overall height reduced by 6 ’ Construction Costs Reduced height

33 HVAC Advantages Savings Compared to VAV Smaller AHU’s Smaller Ductwork Less Noise Low Maintenance Lower Electrical Infrastructure Cost Less Fan HP Lower Operating Cost

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39 Questions? STORIES FROM THE AUDIENCE?


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