Units for suspended ceilings Type DID632

Transcription

1 Type with hinged induced air grille water connections Active chilled beam with two-way air discharge and horizontal heat exchanger in lengths from to 0 feet Active chilled beam for heating and cooling, with -pipe or 4-pipe heat exchanger, for integration with various ceiling systems Preferably for room heights up to 5 feet High heating and cooling capacity with a low conditioned primary air volume flow rate and low sound power level Six nozzle variants to optimize induction based on demand Hinged, removable induced air grille in four designs Primary airflow ragne from 5 to 360 cfm Side- or top-entry primary air connection Optional equipment and accessories Control package Also available as supply and extract air combination Adjustable air control blades to control the airflow Heat exchanger powder-coated black Powder coating in variety of RAL colors 0/08 US K.

2 General information TROX USA, Inc Settingdown Circle Cumming, GA Type Page General information. 5 Dimensional data. 6 Coil and casing arrangements. 7 Installation. 9 Attachments. 0 Nomenclature and performance notes. Quick sizing. 3 Comfort. 4 Selection example. 5 Specification text and order code. 6 Installation examples Installation into T-bar ceilings Variants -LR -GL Product examples K. 0/08 US

3 General information Description Application Active chilled beams of Type for the integration into various ceiling systems, preferably for room heights up to 5 ft -pipe or 4-pipe heat exchangers enable good comfort levels with a low conditioned primary air volume flow rate Energy-efficient solution since water is used as a medium for heating and cooling Adjustable air control blades (optional) allow for the manual adjustment of the air discharge direction The high water-to-airside cooling ratio with primary air volume means the is ideal for use with dedicated outdoor air system (DOAS) designs. Variants -LR: With induced air grille perforated sheet metal, circular holes -GL: With induced air grille longitudinal blades Construction Powder-coated RAL 900 P: Powder-coated in any other RAL color Nominal sizes 4, 5, 6, 7, 8, 9, 0 ft Attachments Primary air connection (45 connection) for supply and extract air combination Adjustable air control blades Useful additions Connecting hoses Control equipment consisting of a control panel including a controller with integral room temperature sensor; valves and valve actuators; and compression couplers Special features Adjustable air control blades to control the airflow Hinged, removable induction air grille in two designs Induction grille can be reversed in the field so that face opens in the direction providing easiest access in the field Horizontal heat exchanger as -pipe or 4-pipe system Water connections are plain-ended or ½ inch male NPT (cost option) Water connections on the top near either end of chilled beam Internal nozzle plate with punched nozzles (non-combustible) Construction features Primary air inlet is suitable for circular ducts 4 or 6 suspension points for on-site installation (by others) Six nozzle variants to optimize induction based on demand Integral extract air inlet (optional) Materials and surfaces Fixed hanging brackets, primary air plenum and spigot made of unpainted galvanized steel Nozzle plate and casing made of powdercoated steel Perforated induction grille (LR) made of powder-coated galvanneal Linear bar induction grille (GL) made of aluminum (cost option) Exposed surfaces are powder-coated white (RAL 900) as standard or alternative RAL color as cost option Heat exchanger natural finish or flat black as cost option Heat exchanger made of copper tubes and formed aluminum fins Air control blades made of polypropylene, UL 94, flame retardant (V0) Installation and commissioning Preferably for rooms with a clear height up to 5 ft Flush ceiling installation Provided with at least two fixed brackets along each side of the beam's length (for lengths 8 ft and greater, a third bracket is added on each side) for on-side installation (by others) Side entry primary air inlet] Installation and connections to be performed by others; fixing, connection and sealing material to be provided by others Heat exchangers are fitted with water flow and water return connections at the narrow side Installation into T-bar ceilings or continuous ceilings Weight of active chilled beam should not be supported by the ceiling grid (suspension points should always be used) Maintenance No moving parts, therefore low maintenance The heat exchanger can be vacuumed with an industrial vacuum cleaner if necessary 0/08 US K. 3

4 General information Technical data Nominal length 4, 5, 6, 7, 8, 9, 0 ft Length 4, 6, 8, 0 ft (other lengths on request) Width 4 in Height 8½, in (nozzle type dependent) Primary air connection, diameter 3 ⅞, 4⅞, 5⅞, 7⅞ in (nozzle type dependent) Primary air volume flow rate cfm Cooling capacity Up to 306 Btu/h Heating capacity Up to 977 Btu/h Max. operating pressure, water side 50 psi Max. operating temperature 65 F - 00 F Schematic illustration of Fixed hanging bracket Primary air inlet 3 Casing 4 Water connections 5 Induction grille 6 Nozzles K. 4 0/08 US

5 General information Function Functional description Active chilled beams provide conditioned primary air (fresh air) to the room from a central air handling unit (AHU). The air is required to maintain indoor air quality while providing additional cooling and/or heating using an integral heat exchanger. The primary air is discharged into the beam mixing chamber from the primary air chamber via induction nozzles. This causes room air to be induced through an induction grille before passing through a horizontally mounted heat exchanger and mixing with the primary air. The mixture is then discharged into the space through integral slot diffusers. There are two types of heat exchanger coils, a -pipe system for cooling or heating (using changeover mode) and a 4-pipe system which enables any room to be cooled or heated independently. Caution! The chilled water system must be designed to prevent the temperature of the water supplied to the heat exchanger from falling below the room dew point to ensure that the beam provides sinsible cooling only. Chilled beam systems should be not designed to condense. The primary air fed to the eams must be pretreated at the AHU to mbaintain the required ventilation and humidity control to the space. Principle of operation 3 Conditioned fresh air (primary air) Supply air 3 Room air (secondary air) 0/08 US K. 5

6 Dimensional data Dimensional data Standard construction with 4-pipe heat exchanger - Side-entry, Type 0 Border DØ H W L = L - ¼ N T-bar installation EM Installation* Length L = L N - ¼ L = L N Width 4 ¾ 36 Standard border (Type 0) shown is designed for flush mounting in a ⁹/₁₆ or ¹⁵/₁₆ T-bar grid ceiling. Optional Border Styles shown below. Height / Nozzle Type Table Beam Length L N Nozzle Type Z M G/J H/U H D H D H D H D 8½ 5⅞ 3⅞ 4⅞ 3⅞ 8½ 8½ 8½ 7⅞ 4⅞ 5⅞ 4⅞ T-Bar border style options Type B TIONS Width Type B IONS Width W - 7 ₁₆ W - 7 ₁₆ Length Length L N - 6 L N - 6 DID Ceiling tile Designed for flush mounting with tegular ceiling tiles for use in a ⁹/₁₆ wide t-bar ceiling. DID Ceiling tile Designed for flush mounting with tegular ceiling tiles for use in a ¹⁵/₁₆ wide t-bar ceiling. K. 6 0/08 US

7 Coil and casing arrangments Coil and casing options Side-entry (standard) active chilled beams are fitted with a -row coil, which can be supplied by a single set of water pipes (-pipe coil) or connected to a separate chilled and hot water piping circuit (4-pipe coil). The primary (larger) circuit in a 4-pipe coil commonly accepts chilled water, while the smaller secondary circuit is connected to a hot water supply. All piping connections are ½ straight copper pipe (⅝ OD). As a cost option, ½ male NPT fittings are available. active chilled beams are also subclassified as "-US" or "-HC" depending on coil circuitry. The -US variant is a single circuit. The -HC variant features a dual-circuit coil and allows water flow rates up to.4 GPM. The secondary piping circuit in 4-pipe versions in both variants is a single circuit. All water connections are plain ends as standard Male NPT fittings are available cost option (A) Chilled water Warm water Right hand water connections DID MR Left hand water connections DID ML Top-entry Coil handing can be left or right 0/08 US K. 7

8 Installation Installation active chilled beams are provided with at least two fixed brackets along each side of the beam's length. For lengths of eight feet and greater, a third bracket is added on each side. These brackets are fixed on the beam's housing and have slotted openings (see below), allowing some repositioning along the beam length. The beam is installed on site using wire or metal hangers (provided by others) according to applicable building codes. The hangers should allow the beam to be vertically adjusted in order to position with the ceiling grid. The induction grille can be hinged down to access the heat exchanger. If preferred, for ease of access, the induction grille can be removed and rotated to hinge down in the opposite direction. The coil connections can be plain-ended for soldered connections or provided with ½ male NPT fittings (cost option) for connection with flexible hoses (recommended). Using NPT fittings and flexible hoses allows for adjustments of minor misalignment of the beam and supply/return ductwork and movement of the beam to align with modular ceiling. Each coil is factory tested for leakage and provided clean and capped off. TROX USA offers high quality stainless steel braided hoses in, 8 or 4 lengths with NPT fixed and swivel joints. Caution: Weight must not be supported by ceiling grid! Fixed hanging bracket. Flexible Hose Kit For fast, easy connection, contact TROX USA for information on available hose kits. For water connection ½ NPT 3 Female swivel thread connection to beam ½ Available lengths:, 8 or 4 Male fixed thread for connection to pipe header Min. bending radius T-bar installation Ceiling installation with T-bars Ceiling installation with concealed T-bars 593 / 68 DID Ceiling tile Installation into T-bar ceilings with ⁹/₁₆ or ¹⁵/₁₆ flat T on 4 in centers, border type - 0. DID Ceiling tile Installation into T-bar ceilings with ⁹/₁₆ or ¹⁵/₁₆ T-bar with tegular tile on 4 inch centers, border type - B and B. K. 8 0/08 US

9 Installation example Installation example Moses H. Cone Memorial Hospital - Installed in patient rooms, hallways and nursing stations 0/08 US K. 9

10 Attachments Description Set of air control blades If a high cooling capacity is required in a very small space, optional air control blades allow for adjustment of air discharge direction to maintain acceptable air velocity in the occupied zone. The airflow of each active chilled beam is spread and discharged according to the room geometry. If the use of a room changes, the air distribution can be optimized by adjusting the air control blades accordingly. It is possible to adjust several sets of air control blades together For fine adjustment, the sets of air control blades can be disconnected from each other To adjust a set of air control blades, use both hands to move the two outer blades of the set as required Maximum possible adjustment is 45 to the right or left in steps of 5 The blade elements are factory set to straight air discharge If the air discharge is not straight, the water-side capacity will be slightly affected. Blades set at 45 may cause a loss of up to 5 %. Set of air control blades Straight air discharge 4 3 Locking Blade 3 Coupling strip 4 Connection Angled air discharge Divergent air discharge K. 0 0/08 US

11 Nomenclature and performance notes Nomenclature L A Pr Pr tpr HW thw S HW thw R CW tcw R CW tcw S X SE N in Btu/h: Space sensible load LAT in Btu/h: Space latent load Pr in cfm: Primary airflow rate to offset latent load HW in gpm: Water volume flow rate, heating CW in gpm: Water volume flow rate, cooling supply in cfm: Discharge flow rate Pr in Btu/h: Primary air cooling capacity HW in Btu/h: Water heating capacity CW in Btu/h: Water cooling capacity tot in Btu/h: Net beam thermal capacity W ROOM in gr: Room humidity ratio WPr in gr: Primary air humidity ratio ΔW in gr: Difference between room and primary air humidity ratio ΔtPr in F: Difference between room air and primary air temperature ΔtW in F: Supply to return water temperature difference ΔtRW in F: Difference between room air and water supply temperature Δpt in in H 0: Air pressure drop Δp w in ft H 0: Water pressure drop tr in F: Room air temperature thw S in F: Water supply temperature, heating thw R in F: Water return temperature, heating tcw S in F: Water supply temperature, cooling tcw R in F: Water return temperature, cooling tpr in F: Primary air temperature L in fpm: Air velocity distance L H₁ in fpm: Air velocity distance H A in ft: Spacing between two diffusers with opposing blow patterns L in ft: Horizontal and vertical distance (x+h ) discharge to the wall H₁ in ft: Distance from ceiling to top of occupied zone (5' 6" above the floor) Coil water flow rate, GPM Multiply CW or HW by: Multiply Δp w in table by: Table : Corrections for other water flow rates t R - t CWS Multiply CW by: Table a: Corrections for other chilled water supply temperatures Useful equations: Pr =.09 x Pr x (tr - tpr) ΔtW = W / (500 x CW) t HWS - t R Multiply HW by: Table b: Corrections for other hot water supply temperatures 0/08 US K.

12 Quick sizing Quick sizing L N 4 6 Z M J G H U Z M J G H U Reference values Primary air Cooling mode Heating mode Isothermal -pipe system 4-pipe system 4-pipe system Throw Pr Δp t Q tot ¹ Q CW ² Δp W ³ Q tot ¹ Q CW ² Δp W ³ Q NET ⁴ HW ⁵ Δp W ³ ft. CFM in H₂0 Btu/h Btu/h ft H₂0 Btu/h Btu/h ft H₂0 W K kpa ,685,50,504,068 3, ,97,653,609,5 3, ,6,968 3,39,739 4, ,55,97,354,80, ,398,636 3,9,49 4, ,078 3,098 3,84,86 5, ,88,066,660,898 3, ,857,768 3,64,55 4, ,66 3,47 4,46 3,00 5, ,49,70 3,067,087 3, ,394,979 4,64,749 5, ,307 3,457 5,049 3,98 5, ,606 3,86,40 4, ,34 4,854,895 5, ,508 5,750 3,46 5, ,465,73 4,5,50 4, ,587 3,9 5,344,949 4, ,576 3,58 6,33 3,65 5, ,57,7 3,044,500 3, ,339 3,547 4,045 3,83 5, ,093 4,3 4,798 3,88 7, ,74 3,94 4,05 3,045 5, ,33 4,007 5,04 3,78 6, ,47 4,55 5,833 4,00 8, ,56 3,058 4,0,84 5, ,489 3,856 5,08 3,575 7, ,478 4,40 6,68 4,00 8, ,647 3,796 5,369 3,58 6, ,585 4,300 6,8 3,995 7, ,40 4,689 7,087 4,366 8, ,878 3,70 5,606 3,49 6, ,445 4,397 7,35 4,088 7, ,79 4,874 8,46 4,54 7, ,784 3,954 6,497 3,667 6, ,47 4,554 8,56 4,37 7, ,980 4,973 9,644 4,637 7, Parameter Cooling Heating t R 75 F 70 F t Pr 55 F 55 F (isothermal) t WV 57 F 0 F CW.0 GPM NC⁷ K. 0/08 US

13 Quick sizing Quick sizing L N 8 0 Z M J G H U Z M J G H U Primary air Cooling mode Heating mode Isothermal -pipe system 4-pipe system 4-pipe system Throw Pr Δp t Q tot ¹ Q CW ² Δp W ³ Q tot ¹ Q CW ² Δp W ³ Q NET ⁴ HW ⁵ Δp W ³ ft. CFM in H₂0 Btu/h Btu/h ft H₂0 Btu/h Btu/h ft H₂0 W K kpa ,359 3,597 4,09 3,330 5, ,74 4,66 5,394 4,305 7, ,708 5,93 6,359 4,944 0, ,446 4,40 5,50 3,844 7, ,49 4,796 6,0 4,468 8, ,47 5,88 6,898 4,939 0, ,878 4,37 5,58 3,84 7, , 4,936 6,888 4,60 9, ,333 5,503 7,975 5,45 0, ,038 4,643 6,77 4,3 8, ,359 5, ,009 9, ,503 5,80 9,34 5,433 0, ,790 4,74 7,464 4,46 8, ,598 5,46 9,4 5,05 9, ,86 5,96 0,8 5,587 9, ,847 4,58 7,59 4,64 7, ,350 5,44 9,859 5,069 8, ,3 5,968,907 5,594 9, ,83 3,960 4,544 3,673 6, ,68 5,3 6,68 4,96 9, ,865 6,3 7,486 5,744, ,75 4,65 5,854 4,330 8, ,454 5,494 7,096 5,37 0, ,489 6,095 8, 5,76, ,887 4,70 6,735 4,558 9, ,377 5,547 8,0 5,380, ,6 6,39 9,445 5,96, ,6 4,999 7,75 4,66 9, ,99 5,77 8,66 5,36 0, ,8 6,63 9,798 5,879, ,989 5,88 8,86 5,5 9, ,067 6,060 0,89 5,884, ,905 6,59,7 6,409, ,97 5,79 8,849 4,930 9, ,53 6,089,53 5,7 0, ,600 6,634 3,06 6,39 0, ¹Q tot includes Q CW plus sensible cooling provided by primary air 0 F below room temperature at the flow rate indicated ² Q CW is coil sensible using.0 GPM of chilled water supplied 8 F below the room temperature ³Δp W is the water head loss at the referenced water supply flow rate ⁴Q NET is coil heating using referenced hot water flow rate supplied 50 F above the room temperature ⁵ HW is hot water flow rate limited to the lesser of.5 GPM or that which results in a supply to room air temperature ⁶Isothermal throw values presented to 50, 00 and 50 FPM indicated at VH₁ in selection program ⁷NC values are based on a room absorption of 0 db (per octave band) re 0 - watts (-) indicates NC value less than 5 Maximum 5 % reduction of water-side capacity has to be considered if the air control blades have been adjusted by up to 45. NC⁷ 0/08 US K. 3

14 Comfort Comfort TROX USA selection software can be used to predict the value of local velocities and temperatures at critical locations where the air stream enters the occupied zone. Room air distribution with active chilled beams Active chilled beams distribute air within the room in a manner consistent with that of linear slot diffusers. As such, the relationship between air stream terminal velocities and thermal decay of the supply air stream that applies to linear slot diffusers also applies to active chilled beams. Upon discharge to the open space, velocity and temperature differentials between the supply air mixture and the room begin to diminish due to room entrainment. As with linear slots, chilled beams exhibit relatively long throw characteristics and their velocity and temperature differentials diminish at a rate that is directly proportional to the distance the air has traveled within the space. Most manufacturers present throw data using isothermal air for terminal velocities of 50, 00 and 50 FPM. This data can be used to map the airstream and predict the local velocity at the point where it enters the occupied zone. As the room to supply air differential decays at similar rate, its temperature can also be predicted at the entry point based on the initial temperature differene (Δt₀) between the beam discharge temperature and that of the room into which it is introduced. As the region near outside walls is not defined as part of the occupied zone, local velocities and temperatures do not generally affect occupant thermal comfort. Care should still be taken that velocities down walls are not too high that they affect processes (e.g. fume hoods) on outer walls and that they are sufficient to provide adequate heating where applicable. The area of greatest draft risk usually occurs directly below the point where two opposing air streams collide. Figure indicates that at a temperature difference of.5 F (i.e. air is.5 F cooler than the occupied space temperature measuring point), the velocity ( H ) entering the occupied zone below the collision point should be 50 FPM or less to prevent draft complaints by more than 0% of the occupants. Throw mapping techniques can be used to determine the minimum centerline spacing of those beams that will limit the velocity ( H ) entering the occupied zone to 50 FPM or less. The selection example that follows illustrates the use of mapping to determine minimum beam spacing. Other temperature differences can also be used to vary the air velocity to keep draft complaints below the 0% criteria NECK REGION 80 FEELING OF COOLNESS 70 AIR VELOCITY, fpm % 30 % 0 % 0 % 30 0 FEELING OF WARMTH TEMPERATURE DIFFERENCE, F Figure : Percentage of Occupants Objecting to Drafts (Source: 009 ASHRAE Handbook - Fundamentals) K. 4 0/08 US

15 Selection example Selection sofware Selection Example: The 630 ft laboratory space shown in figure has a sensible cooling load of 6 Btu/h-ft (39,000 Btu/h) and a latent gain of 4,350 Btu/h. beams will be used to serve the space. A space ventilation airflow rate (00% outdoor air) of 6 ACH- (630 cfm) minimum is to be maintained. The room will be controlled at 75 F and 50% RH (65 grains) allowing the supply of chilled water at 57 F. Primary air is delivered at 55 F with a humidity ratio of 54 grains (approximately 50 F dew point temperature). The beams will be mounted flush in a 0 foot high ceiling and the occupied zone is considered to be the lower six (6) feet of the space. Determine the required space primary airflow rate and select/locate the beams such that no velocities exceeding 50 fpm will enter the defined occupied zone. Solution: The primary airflow rate must be sufficient to cool and ventilate the space while providing sufficient latent heat removal to maintain the required space dew point temperature (55 F). The primary airflow rate required to maintain the design space dew point is calculated as: LAT = LAT / (.68 x ΔW) = 4,350 / [(0.68 x (65 54)] = 58 cfm Therefore the airflow needed to meet the latent requirements is 58 cfm (less than the space ventilation rate) and 630 cfm becomes the predominant minimum primary airflow rate needed under these design conditions. If we consider 6 beams ( pipe coils) for this space, by referring to the table on page 8, six (6) six foot beams with G nozzles, delivering 05 cfm each and a water flow rate of.0 GPM (model -US) will provide a total sensible cooling of: 6,585 Btu/h each (Q Pr + CW ) six beams = 39,50 Btu/h and 630 cfm.sensible cooling and latent air volume is achieved As this airflow requirement exceeds the space sensible and latent cooling requirements at the minimum ventilation airflow rate, the selection is confirmed. The individual acoustical level of each beam is NC30. The beams throw (at 05 cfm) to a terminal velocity of 50 fpm is 0 feet. The thro w to 50 fpm should not exceed half of the beam s (center line) spacing, plus the distance from the ceiling to the top of the occupied zone. In this case, the vertical distance is five (5) feet, so the beams should be spaced at least ten (0) feet apart. 0 ft o.c. 0 ft o.c. ft 30 ft Figure : Chilled beam locations for selection example SEN = 6 Btu/h - ft LAT = 7.5 Btu/h - ft Pr = 630 cfm 0/08 US K. 5

16 Specification text and order details Description This specification text describes the general properties of the product. Contact TROX USA for texts for variants. Furnish and install TROX series active chilled beams in the quantities, sizes and configurations shown on the project plans and schedules. The assembly shall consist of a primary air inlet and upper chamber, a series of high induction nozzles and lower chamber housing with hydronic heat exchanger coil, with intake grille and discharge slots. Primary air is supplied thorugh the integral nozzles, creating induction of room air through the induction grille and heat transfer coil, where it is reconditioned and mixed with the primary air before being discharged through linear slots located along the sides of the assembly. Special features Adjustable air control blades to control airflow Hinged, removable induction air grille in two designs Induction grille can be reversed in the field so that face opens in the direction providing easiest access in the field Horizontal heat exchanger as -pipe or 4-pipe system Water connections are plain-ended or ½ inch male NPT (cost option) Water connections on the top near either end of chilled beam Internal nozzle plate with punched nozzles Materials and surfaces Fixed hanging brackets, primary air plenum and inlet made of unpainted galvanized steel Nozzle plate and casing made of powdercoated steel Perforated induction grille (LR) made of powder-coated galvanneal Linear bar induction grille (GL) made of aluminum (cost option) Exposed surfaces are powder-coated white (RAL 900) as standard or alternative RAL color as cost option Heat exchanger natural finish or flat black as cost option Heat exchanger made of copper tubes and formed aluminum fins Air control blades made of polypropylene, UL 94, flame retardant (V0) Technical data Nominal length: 4, 5, 6, 7, 8, 9, 0 f ft Length: 4, 6, 8, 0 ft (other lengths on request) Width: 4 in Primary air inlet, diameter: 3 ⅞, 4⅞, 5⅞, 7⅞ in (nozzle type dependent) Primary air volume flow rate: CFM Cooling capacity: Up to 306 Btu/h Heating capacity: Up to 977 Btu/h Max. operating pressure: 50 psi Max. operating temperature: 65 F - 00 F Order code LR G ML A B / / 0 RAL... / G / I / 0 Order options K. 6 Type -US Active chilled beam -HC Active chilled beam Face options LR Perforated metal, circular holes GL Linear bar Heat exchanger -pipe 4 4-pipe Nozzle options Z Small plus M Small J Medium plus G Medium H Large U Extra large Arrangement of casings and connections ML Left side entry MR Right side entry T Top entry Coil connections 0 Plain (standard) A Male NPT Border type 0 T-bar flush B Tegular ⁹/₁₆ T-bar B Tegular ¹⁵/₁₆ T-bar EM Exposed mount Nominal length x active length x inlet size L N x L ACTIVE x inlet size Face finish 0 Standard finish, powder-coated RAL 900 P Powder-coated, specify RAL color Face color Specifiy RAL color Coil finish 0 Standard self finish G Flat black Insulation 0 Standard no insulation I Internal insulation Hanging brackets 0 Fixed brackets standard S Sliding brackets 0/08 US