LINEAR SLOT DIFFUSERS

Transcription

1 Supply, Reurn, Dummy Linear Slo Diffusers A OSLD OTIMA model OSLD is a supply linear slo diffuser wih inegral volume conrol damper and hi and miss air sraighening deflecors. h Hi and miss air sraigheners and inegral damper are fully adjusable from he of he diffuser. OSLD2 OTIMA model OSLD2 is a reurn or exrac linear slo diffuser wih air paern conrolling deflecors (Hi and miss damper). S S 2 B Hi and miss damper is fully adjusable from he face of he diffuser. OSLD OTIMA model OSLD is a dummy or non acive linear slo diffuser wih hi and miss damper and a blanking plae o replace inegral damper. Available from hrough slos wih differen slo widhs for low, medium and high capaciy requiremens. More han slos available on reques.

2 Supply, Reurn, Dummy Slo Diffusers A OSLD OTIMA model OSLD is a supply linear slo diffuser wih inegral volume conrol damper and hi and miss air sraighening deflecors. h Hi and miss air sraigheners and inegral damper are fully adjusable from he face of he diffuser. OSLD S B S OTIMA model OSLD is a reurn or exrac linear slo diffuser wih air paern conrolling deflecors (Hi and miss damper). Hi and miss damper is fully adjusable from he face of he diffuser. OSLD OTIMA model OSLD is a dummy or non acive linear slo diffuser wih hi and miss damper and a blanking plae o replace inegral damper. For T S and T ER ype models: N N W L A B S = Nominal size = Duc size = L x W = L x No. of Slos = Widh of he plenum, indicaed in No. of Slos = Lengh of he Slo Diffuser = Neck size = Widh of he slo diffuser neck = Overall widh from he face side of he slo diffuser (flange o flange widh) = Slo widh = mm / mm / 2 mm of models TL / TM / TH respecively Coding:. Slo diffuser 2. Slo widh. Inegral damper. Hi and miss damper. Diffuser flange

3 Consrucion Deails and Dimensions A S S 2 B Slo diffuser dimensions: No. of Slos Slo mm Slo mm Slo 2 mm A B A B False ceiling opening size = (B ) mm Error correcion = + % due o manual work N L W = = = Nominal size = L x W Lengh of linear slo diffuser Widh of linear slo diffuser indicaed in No. of Slos

4 Consrucion Deails and Dimensions A h 0 S S 2 B Slo diffuser dimensions: No. of Slos Slo mm Slo mm Slo 2 mm A B A B N L W = = = Nominal size = L x W Lengh of linear slo diffuser Widh of linear slo diffuser indicaed in No. of Slos False ceiling opening size = (B 2) mm. Error correcion = + % due o manual work.

5 Consrucion Deails and Dimensions 0 0 A wih End Cap 0 90 corner piece 0 0 B wih End Flange 0 corner piece C wih open ends D wih one side End Cap/Flange E wih boh side End Caps/Flanges For posiive alignmen of adjacen secions alignmen srips provided wih each diffuser.

6 Consrucion Deails and Dimensions lenum box deails: OTIMA acousically lined plenum box is used for evenly disribuing cool air over he surface of he linear diffuser wih minimum noise urbulence, hereby mainaining correc performance characerisics. I saves fabricaion and insallaion labor. lenums are manufacured o sui he full range if linear diffusers from o slos. All joins are welded and sealed for air igh funcioning which adds o mainain rigidiy. Inernal baffles are perforaed shee or spliers o sui he design, or a combinaion of boh in special cases. Maximum one piece lengh is 0mm. Above his lengh plenums are supplied in muliple secions of even lengh each provided wih an inle spigo. Maerial: lenum box is manufacured form galvanized shee seel of 0. mm hickness and inernally lined insulaion is of 2 mm hickness mineral fibre. Y D H X 2 lenum dimensions wih insulaion: lenum dimensions wih insulaion: No. of Slos D H x Y No. of Slos D H x Y 0 0 X X X X X X X X X X + 0 X + 00 X + 0 X + 00 X + 0 X + 00 X + 0 NOTE: NOTE: * A = slo diffuser neck size * A = slo diffuser neck size Thickness of he insulaion = 2 mm

7 Engineering and erformance Dae ossible combinaions of discharging of air by adjusing he Hi and miss damper. 0% horizonal along he ceiling 0% verically downwards 00% horizonal along he ceiling 00% verically downwards 00% horizonal along he ceiling 00% verically downwards 0% horizonal along he ceiling 0% verically downwards

8 Engineering and erformance Dae Air Inducion In ceiling applicaion, he air inducion raio for slo diffusers wihou any blade seing is low, compared o air inducion wih ceiling diffusers. Air inducion increases very rapidly wih he adjusmen of he deflecion blades. For such reason, no deflecion should be applied wih false ceiling heigh of more han.00 meer. 2 slo Air inducion Air flow m /h. 00 For low ceiling heigh he deflecion becomes necessary and hrow mus be adaped accordingly. slo,000 Wih slo diffusers, flow paern can be adjused o any local siuaion. Influence on air inducion wih and wihou blade seing is shown on opposie graphs and phoos are made under following condiions: sandard mode wih mm slo widh no deflecion seing 0 deflecion blades adjused o angle seing. no resricion on air flow diffuser lengh 00 mm per m. lengh Induced air raio o m /h supply air. slo slo,00 2,000 2, This model gives an air flow paern which is adjusable from full lef o full righ by simply adjusing he deflecion blades (Hi and miss damper). This can be easily done before or afer insallaion. This high capaciy uni has been designed o serve he performance oriened marke of oday. Air flow capaciy can be conrolled by he inegral volume damper or inle spigo damper in he plenum box. Technical daa Induced Air Flow Symbols V o Oule air velociy V Terminal air velociy V Supply air flow rae V i Induced air flow rae V L Toal air volume a end of hrow V L = V + Vi I Inducion raio o Supply air emperaure r Room emperaure x Air emperaure in he je axis a a disance X o Supply air emperaure differenial x Temperaure differenial a a disance X ( ) raio m/s m/s m /h or m /s m /h or m /s m /h or m /s O C O C O C K K Formulae i = V L V i = 0.. x ( ) = x o o V o V x x = r + 0 ( ) 0 = 0 + r x = x r

9 Engineering and erformance Dae Sound level The sound level of a linear slo diffuser is in direc raio o he velociy of he are passing hrough i. Due o he reduced sound level of SLD diffusers, air passing hrough a properly seleced oule will no add any appreciable noise o he sound level of he general air condiioning sysem. When hi and miss damper or inegral damper is parially closed for balancing purposes, noise level can increase in funcion of he imporance of he air disribuing nework. For disribuing nework exending more han 0 meer, basic balancing should be made by volume conrol dampers in he ducing. Adjusmen of deflecion blades does no add any complemenary sound level. Final sound aenuaion in he disribuing sysem can be obained by inside sound insulaion in he plenum boxes. In order obain reasonable sound level, velociy in he oule should be seleced as follows: Ceiling heigh m max m/sec. m max m/sec. m. max m/sec. Effec of damper adjusmen on noise generaion Symbols 2 Toal pressure drop hrough regiser, wih damper fully open (read from selecion diagram) Toal pressure drop hrough regiser, wih damper parially open a a 2 NR NR2 NR Raio of pressure drops Noise level wih damper fully open (c.f. selecion diagram) Noise level wih damper parially open Increase in noise level Formula NR2 = NR + NR

10 Engineering and erformance Dae Throw Tes Daa roduc: Linear Slo Diffuser Slo Run No. Air Volume L/s Disance from Oule (m) cm Velociy in m/s. Run No. 2 Air Volume L/s 00 Disance from Oule (m) cm Velociy in m/s.

11 Engineering and erformance Dae Sound Tes Daa Ocave Band Cener Frequency Herz Linear Slo Diffuser Slo Discharge Sound ower Level Lw 2 db re 0 Wa * 2.* * 2.* * * Toal Air Volume L/s Inle Toal ressure, a 2 **Noise Crieia 2 2 * ** Sound power level daa marked wih an aserisk has reached ambien levels in he es room. Acual levels are less han or equal o he levels indicaed. Noise Crieria raings were deermined by subracing 0 db (room effec) from he Sound ower Levels. Noise level for Linear diffusers Model T S TM /T ER Tm slo 2 slo slo slo slo slo 2 slo 2 slo slo slo slo slo TS TM T ER TM Air floe m /h

12 Opima Engineering and erformance Daa Selecion ables for Linear Slo Diffusers slo widh = mm No. of Slos Area Facor A k Liers / Second / Meer (a) (a) 0... < (a).. < (a) < (a)..2. < < (a) (a).0.. <

13 Engineering and erformance Dae Selecion ables for Linear Slo Diffusers slo widh = mm No. of Slos Area Facor A k Liers / Second / Meer (a) (a) (a)

14 Opima Engineering and erformance Daa Selecion ables for Linear Slo Diffusers slo widh = 2 mm No. of Slos Area Facor A k Liers / Second / Meer

15 Engineering and erformance Daa Easy selecion graphs for Linear slo Diffusers Slo Widh = mm V k V = 0.2 me./sec. = No. of Slos erformance characerisics are based on m. lengh. No. of Slos N.C. N.C. 0 Air volume V = L./sec. Toal ressure (a) ,,, 2,

16 Opima Engineering and erformance Daa Easy selecion graphs for Linear Slo Diffusers Slo Widh = mm V k No. of Slos 0 N.C. N.C. Air volume V = L./sec., Toal ressure (a), 2, V = 0.2 me./sec. = No. of Slos erformance characerisics are based on m. lengh