Active Chilled Beams (Metric)

(2-way) ACB40 (1-way) ACB50 ACTIVE CHILLED BEAMS (METRIC)

Active Chilled Beams Our Mission…

“To be the leading specialist in energy efficient and environmentally sustainable HVAC technologies and technical expertise, with the aim of delivering the most efficient and value added solution.”

Going Beyond Conventional Wisdom…

In the design of a typical HVAC system, many decisions are made based largely on past experience and conventional wisdom. While this often results in a satisfactory system, it may not result in an optimal “green” design. With the movement toward sustainable building designs, there is an increased emphasis on improving both the energy efficiency and comfort level of all HVAC systems.

The general design intent of an active chilled beam system is for the central system to circulate only the amount of primary air needed for ventilation and latent load purposes, with the active chilled beams providing the additional sensible cooling (and heating) and air movement required through the induced room air and secondary water coil. Active chilled beam systems transfer a large portion of the cooling (and heating loads) from the less efficient air distribution system (fans and ductwork) to the more efficient water distribution system (pumps and pipes). The net result of this shift in loads is lower energy consumption and operating costs.

DADANCO Active Chilled Beams offer an opportunity to improve both the energy efficiency and comfort level over conventional ‘All-Air’ HVAC systems in many market sectors including Schools and Universities, Healthcare and Hospitals, Hotels, Laboratories, Commercial offices, Government, Institutional and Defense buildings, either for New build or Green refurbishment.

Contents…

Dadanco Technology Page 3 What is an Active Chilled Beam? Page 4 Why are Active Chilled Beams “Green” & Additional Benefits Page 5 & 6 Application Considerations Page 7 Computerized Selection Method & Performance Page 8 ACB40 & 50 Dimensional Data Sheets Page 9 Air & Coil Configuration Keys Page 10 to 12

2 DADANCO Technology

DADANCO Active Chilled Beams utilize unique nozzle and unit fluid dynamics technology. This patented technology provides very high air entrainment ratios at low pressure drops.

A major benefit ofDADANCO’s technology is that this superior performance is delivered at the lowest noise levels.

DADANCO Active Chilled Beams can typically provide higher secondary to primary airflows as compared to others, often providing unit selections with either greater capacity or reduced size. This often results in cost savings due to a smaller number of units being installed or the use of smaller units.

DADANCO Active Chilled Beams have been tested both in-house and independently at ETL Laboratories.

3 What is an Active Chilled Beam?

Active chilled beams are continuously supplied with primary air by the central air handling system. This primary air is supplied to the active chilled beams at a constant flow and pressure and its volume is typically above the minimum ventilation requirement for the space.

The primary air must be dehumidified sufficiently to handle all of the room latent loads and can also be cooled or heated to handle a portion of the room sensible loads.

2 3 3 1

7 7

Operation of an ACB40 (2-way) ACB50 (1-way) operation is similar, however, only 1 slot 4 discharges mixed (cooled or heated) air back into the space.

Conditioned primary air (1), from the central AHU, is ducted to the chilled beam’s upper air plenum (2) and introduced into the active chilled beam lower air chamber (6) through a series of induction nozzles (3). Due to the fluid dynamic properties of the nozzles, room air (4) is drawn upwards into the active chilled beam’s heat exchange coil (5) by an induction process. The heat exchanger coil has either elevated temperature chilled water or low temperature hot water piped to it from the central plant via secondary pipework distribution systems.

As induced room air crosses the coil, it is cooled or heated dependent on the demand of the space (set via the room temperature sensor operating the chilled water or hot water control valves) to the extent needed to control the room temperature. Induced room air (now either cooled or heated) is then mixed in the lower air chamber (6) with the primary air and the mixed (supply) air (7) is then discharged into the room. The return water from the coil is recirculated back to the central plant where it is either re-chilled (under cooling) or re-heated (under heating).

4 Why are Active Chilled Beams “Green”?

In general, the design intent is for the central air handling system to circulate only the amount of air needed for ventilation and latent load purposes, with the active chilled beams providing the additional air movement and sensible cooling and/or heating required through the induced room air and secondary water coil. In this manner, the amount of primary air circulated by the central system is significantly reduced (often 75% - 85% less than conventional “all air” systems).

Active chilled beams transfer a large portion of the cooling and heating loads from the less efficient air distribution system (fans and ductwork) to the more efficient water distribution system (pumps and piping).

The net result of this shift in loads with active chilled beam systems is lower energy consumption and lower operating costs. Studies have shown that fan energy is the largest HVAC energy consumer in a typical commercial building. With active chilled beam systems, the fan energy is significantly reduced due to the relatively low quantity and pressure of the primary air being circulated by the central air handling system.

Additional Benefits

Improved comfort through excellent air movement and uniform air temperatures throughout the room, with little concern about potential drafts and dumping at part load conditions. As the airflow and resulting air movement is constant at all load conditions and the induced room air is typically 3 - 4 times the amount of primary air, the temperature of the mixed air being continuously discharged into the room is moderate (generally 15 to 17 °C in the cooling mode and in the 28 to 30 ° C in the heating mode). Air velocity in the room is also comfortable and constant.

Excellent indoor air quality and odour control as the full ventilation air requirements are delivered to the zones at all times and at all load conditions.

Superior humidity control at all sensible load conditions is also assured as the constant volume primary air is delivered with the proper moisture content to satisfy the room latent loads.

5 Very low noise levels are achieved when the active chilled beams are sized at the typical inlet static pressures of around 125 Pa or lower. DADANCO nozzles are whisper quiet as they rapidly induce secondary air to reduce the momentum and length of the primary air jet (penitential core zone) which significantly reduces the noise generated by the nozzles. As there is no terminal unit fan or motor in or near the occupied spaces, the noise is further reduced when compared with the more conventional systems. Conventional Nozzles DADANCO Nozzles

Space savings in the ceiling plenums and vertical air shafts simplify the system installation. The ductwork system size is greatly reduced and in some cases, the building’s floor to floor dimension can be reduced, lowering the building’s installed cost or yielding more rentable floors with the same building height. Additionally, the size of the mechanical room can often be reduced due to the smaller central air handlers required to serve the chilled beams.

DADANCO Active Chilled Beams have significant performance advantages which often result in less beams required, enabling architects to achieve “cleaner” ceiling layouts while providing the engineer with a high degree of design flexibility in positioning the beams..

6 APPLICATION CONSIDERATIONS Primary Air System There are a number of important issues affected by the primary flow rates, pressure and temperature chosen in the primary air system design including: • Ventilation Air Requirements • Primary Air Latent Cooling Capacities • Risk of Over-cooling/Reheating • Building Pressurization Control

Choosing the primary air flow rates and Airflow requirement reduced by 70% temperature requires considerable thought and judgment. Decreasing the primary air temperatures offers the opportunity to decrease fan energy consumption (within the limits of the ventilation air requirement) and increasing latent 70% of sensible heat removed cooling capacities, while potentially increasing the by chilled beam water coil risks of over-cooling/reheating.

Other design concerns with the primary air system design include: • Air Handler/Ductwork Zoning and Resetting of Primary Air Temperatures • Air Distribution Considerations • Noise Level Requirements • Heating Secondary Water System The elevated chilled water temperature entering the active chilled beam secondary water coils must be above the room design dew point temperature to avoid formation of condensate on the coil. Using the room design temperature of 24 °C db/ 17 °C wb (50% relative humidity), the room air dew point temperature is 12.8 °C. In this case, the minimum entering chilled water temperature to the active chilled beams should be above 12.8 °C (typically 14 to 16 °C is used in practice).

Choosing the secondary chilled water temperature is another area requiring considerable thought and judgment. A higher chilled water temperature will add to the margin of safety relative to condensation concerns and increase the hours when a water-side economizer can be used to serve the active chilled beams, but could have the effect of increasing the fan and pump energy requirements and unit costs. Heating The suitability of the use of overhead heating in any system (Active Chilled Beam, Fan coil, CAV or VAV, etc.) is dependent on the extent of heat losses along the perimeter and this loss determines which discharge arrangements may be appropriate. In general, overhead heating is acceptable if the heat losses are less than 384 W/m along the perimeter.

When using overhead heating, it is also important to minimize the temperature differential between the supply air and the room air, temperature differentials of 8.5 °C or less are recommended.

7 COMPUTERIZED SELECTION METHOD

The DADANCO computerized selection program can be accessed and downloaded from our website @ (www.dadancoeu.com).

The first step in making chilled beam selections is to define the Global Design Conditions of the project. This is done in the box at the top of the selection software, all parameters in red and blue are inputs. The beam model and coil type (2 or 4-pipe) must be manually chosen for each selection, but all other

parameters (beam length, primary air flow rate and pressure drop, water flow rates) can be automatically selected by the software. In the box below the Global Design Conditions, you input the upper limits to allow the program to make ‘auto’ selections without exceeding this criteria.

The goal of each selection is to satisfy the zone loads which are input in the section below:

The auto select function will find the optimal selection that satisfies the sensible load, heating load, and minimum primary air requirement, while not exceeding any of the maximum values set in the auto- selection criteria. By default, the software sets the number of units in each zone to be one beam for every 1500 W of sensible load. If a different number of beams is desired, a new quantity can be manually entered. The selection software contains the full range of performance data for all available nozzle configurations, allowing the optimal beam selection to be found quickly and easily for every zone.

8 TABLE 1

CODE LENGTH WIDTH REF L REF W ACB40-600 595 595 355 577 ACB40-1200 1195 595 955 577 ACB40-1800 1795 595 1555 577 ACB40-2400 2395 595 2155 577 ACB40-3000 2995 595 2755 577

TABLE 2 AVAILABLE OPTIONS Ø1/2'' O.D.SWT CONNECTION

Ø1/2'' FEMALE NPT CONNECTION

Ø1/2'' MALE NPT CONNECTION

TABLE 3 AIR INLET CONNECTION 1 2'' COIL CONNECTION (SEE TABLE 3 FOR (SEE TABLE 2 FOR REF. DIAMETER DIMENSION OPTIONS) AVAILABLE OPTIONS) ROUND 102.4

ROUND 153.2

OVAL 152.4x241.3

ACB 40/ACB50 SUBMITTAL DRAWING

DADANCO EUROPE

DESIGN: TITLE: REVIEW: ACB 40 (2WAY) CERTIFED: ACB 50 (1WAY)

DATE 22. 3. 2016. UNLESS NOTED OTHERWISE ALL DIMENSION IN mm PROJECT NAME A3 ANGULAR TOL: 1.0° LINEAR TOL:±1.50mm Draw 1 MATERIAL: SCALE: SHEET 1 OF 1

Note: While every effort is made to ensure the details contained in this publication are current and up-to-date, in the interest of ongoing product development DADANCO EUROPE reserves the right to alter the same without notice AIR & COIL CONFIGURATION KEY – ACB 40 Notes: • Air handing is represented by digit 13 in the model number • Coil handing is represented by digit 17 in the model number • Non-Standard configurations represented by "Z"

Air Handing: C Coil Handing: C

Air Handing: D Coil Handing: D

Air Handing: E Coil Handing: E

10 AIR & COIL CONFIGURATION KEY – ACB 50 Notes: • Air handing is represented by digit 13 in the model number • Coil handing is represented by digit 17 in the model number • Non-Standard configurations represented by "Z" • *NOTE: Red arrow denotes direction of airflow

Air Handing: F Coil Handing: A

Air Handing: F Coil Handing: B

Air Handing: G Coil Handing: A

11 AIR & COIL CONFIGURATION KEY – ACB 50 Notes: • Air handing is represented by digit 13 in the model number • Coil handing is represented by digit 17 in the model number • Non-Standard configurations represented by "Z" • *NOTE: Red arrow denotes direction of airflow

Air Handing: G Coil Handing: B

Air Handing: H Coil Handing: A

Air Handing: H Coil Handing: B

12 Government, Institutional & Defense Buildings

Hospital & Healthcare………………

Schools & Universities……………

Commercial Offices……………

Green Renovations………

Laboratories………

Hotels…… E U R O P E

Bulevar Mihajla Pupina 16V 11070 Novi Beograd Republic of Serbia Tel: +381 11 367 57 64 Tel: +381 11 367 57 82 www.dadancoeu.com [email protected]