BNA. PLENUM FAN with Backward Wheels

Transcription

1 BNA PLENUM FAN with Backward Wheels

2 BNA Series PLENUM FAN with Backward Wheels

3 BNA Series BNA Series Plenum Fans Backward wheels Kruger Plenum Fans are designed for air handling applications where the fan operates unhoused within a pressurized plenum. This results in a saving of space normally occupied by the fan housing, transitions and diffusers. The fan wheel pressurizes the entire surrounding air plenum in which the fan is installed. This allows air ducts from any direction to be directly connected to the air handling unit enclosure. The compact size of the plenum fan makes it an excellent selection for retrofit and replacement application and for variable air volume systems. Type / Operating Limit Each fan type has its maximum operating speed and power due to its mechanical design. The operating limit of BNA series - fan type is design to meet the requirement of class I, II and III limit as defined in AMCA standard The BNA series is available in Direct Driven and Belt Driven, Type D, T or U as small letter Shown: Type D This type is supplied with motor support minimal maintenance with no belts or pulley. It is a compact, space saving design with motor directly connected to wheel. This construction is mainly for cleanroom, with or without VFD, since there is an absence of belt residue which may contaminate the airstreams. Fan Size : 315 to 1400 Volume : 1000 to m 3 /h Total Pressure : up to 4000 Pa Type T Compact design of reduced shaft length with a bearing located in the inlet. It requires separate base for motor mounting. Fan Size : 315 to 1400 Volume : 1000 to m 3 /h Total Pressure : up to 4000 Pa Drawing and dimension of type T available upon request. Type U No bearings in the fan inlet to effect performance, requires separate base for motor mounting. Fan Size : 315 to 1400 Volume : 1000 to m 3 /h Total Pressure : up to 4000 Pa Drawing and dimension of type U available upon request. Wheel TECHNICAL SPECIFICATION The wheel of BNA series has backward curved blades manufactured in cold rolled sheet steel with polyester powder coating finish. Shaft Shafts are manufactured from C45 carbon steel using an automatic process for positioning and cutting of the keyways. All dimensional tolerances of the shaft are fully checked to ensure a precision fit and then coated with an anti-corrosion varnish after assembly. 2

4 BNA Series Bearings Bearings used are either deep groove ball bearing type with an adapter sleeve, or spherical roller bearings type sealed at both sides for different duty application. The bearings are lubricated for life and maintenance-free. If relubrication is necessary, it is recommended to use lithium base grease suitable for all temperatures within the operational limits. Balancing Quality All wheels are statically and dynamically balanced to ISO1940 and AMCA 204 G2.5 standards. All fans after assembly are trim-balanced to ISO1940 and AMCA G2.5 standard. Clean room application fans with balancing grade of G1.0 are available upon request. ACCESSORIES Inlet Guards Inlet guards may be a requirement stated in some industrial safety regulations. These are available on request. Motor Selection The power curve shown on each performance curve represents the absorbed power at the shaft of the fan measured in kw. To determine the power of the motor to be installed, a correction factors should be applied to compensate for transmission losses. For conversion to horsepower (HP), use multiplying factor Correction Factor, % motor power output Pole 4 & 6 Pole Motor power output (kw)

5 BNA Series Performance The performance data shown on each diagram has been tested and measured in accordance to AMCA Standard 210 Fig 12 installation type B (free inlet and ducted outlet condition). The performance is achieved under test conditions of radial discharge, smooth air flows with the aid of proper transitions from plenum outlet to duct, and in a plenum which meets the recommended minimum distance for plenum fans installation. An outlet duct of appropriate size, which gives a reasonable outlet velocity to overcome losses, has also been employed. Rating is referred to the standard air density with the total pressure as a function of the air volume, using logarithmic scales. It is essential that, the same installation type and test standards are used at all times, when comparing fan performances. Noise The noise level shown on each diagram refer to the sound power "Aweighted" and the data on the inlet side has been measured in accordance with AMCA Standard 300. The noise levels of the fans are determined as follows: Sound power level - ("A" scale): Lw (A) as catalogue Octave band spectrum: Lw = Lw(A) + Lw rel. db [refer to Kruger for more details] Sound pressure level: a) free field Lp(A) = Lw(A) - (20log 10 d) -11 b) room conditions Lp(A) = Lw(A) - (20log 10 d) -7 where d = distance of fan (m) SELECTION GUIDELINES To assure optimum performance and be able to use plenum effect pressure loss indicated in the next section, the following guidelines should be adhered to in the plenum fan selection. Minimum Distance Recommended minimum distances for correct plenum fan installation. D = Impeller Diameter

6 BNA Series Plenum Radial Duct Discharge Axial Duct Discharge PLA = K* x Pd Discharge Direction Plenum Effect Loss Fan performance is developed from test conditions of radial discharge. The pressure loss associated with the duct take off, from the plenum, at a different location must be added to the static pressure required of the fan. The correction factor, K*, for pressure loss for axial discharge can be obtained below. Pressure Loss Coefficient, K* Worked Example: Required duty Air volume Q, 8m 3 /s and static pressure P s, 1500Pa with Discharge duct A=1m², For Axial Duct Discharge:- Outlet Velocity, V = Q/A = 8/1 = 8 m/s From chart, at outlet velocity, 8m/s, pressure loss coefficient, K* = 1.4. Pressure loss = K* x Dynamic Pressure, P d = K* x (V/1.3)² = 1.4 x (8/1.3)² = 53 Pa Actual Required static pressure P s = = 1553 Pa Fan Outlet Velocity (m/s) Required Plenum fan selection is to be done with the below duty: Q = 8 m 3 /s and Static Pressure P s = 1553 Pa

7 K R U G E R G R O U P ( V E N T I L A T I O N ) SINGAPORE SINGAPORE KRUGER VENTILATION INDUSTRIES PTE LTD KRUGER ENGINEERING PTE LTD No. 17, Tuas Avenue 10 No. 17, Tuas Avenue 10 Singapore Singapore Tel Fax Tel Fax mktg@krugerasia.com mktg@krugerasia.com MALAYSIA THAILAND KRUVENT INDUSTRIES (M) SDN BHD KRUGER VENTILATION IND. (THAILAND) CO. LTD Lot 8, Jalan Perusahaan 2 Batu Caves 1/19 Moo 2 Rama II Rd, Tasai Industrial Area, Batu Caves Selangor Mueng Samuthsakorn 74000, Thailand Tel Fax Tel / Fax /377 mktg@kruger.com.my mktg@kruger.co.th BEIJING GUANGZHOU BEIJING KRUGER VENTILATION CO. LTD GUANGZHOU KRUGER M&E INDUSTRIES LTD No. 1A South Industry Area No Maogang Road, Huangpu Beijing Economical And Technological Guangzhou, P.R. China Development Area, Beijing China Tel Fax Tel Fax gzkruger@krugerchina.com krugerbj@krugerchina.com HONG KONG SHANGHAI KRUGER VENTILATION (HONG KONG) LIMITED SHANGHAI KRUGER INDUSTRIES CO. LTD Flat C, 9/F, Yeung Yiu Chung (No.8) Industrial Building, No. 500 Yuanguo Road, Anting, Jiading, 20 Wang Hoi Road, Kowloon Bay, Kowloon, Hong Kong Shanghai P.R. China Tel Fax Tel Fax cfyau@kruger.com.hk shkruger@krugerchina.com WUHAN TAIPEI WUHAN KRUGER INDUSTRIES CO. LTD KRUGER VENTILATION (TAIWAN) CO. LTD No. 12 Heping Tieji Industries Parden Hongshan No. 157, Ping-an Rd, Hengfeng Village, Economic Zone, Wuhan P.R.China Dayuan Shiang Taoyuan County 337, Taiwan(ROC) Tel Fax Tel Fax whkruger@krugerchina.com kyyang@krugertwn.com.tw PHILIPPINES AUSTRALIA KRUGER M&E INDUSTRIES CORPORATION KRUGER VENTILATION (AUSTRALIA) PTY LTD FAPI Compound, E. Rodriguez Ave. 4 Blackfriar Place, Wetherill Park Tunasan, Muntinlupa City, Philippines 1773 NSW 2164, Australia Tel Fax Tel Fax mktg@krugerph.com krugerfans@bigpond.com INDONESIA INDIA P.T. KRUGER VENTILATION INDONESIA KRUGER VENTILATION INDUSTRIES (INDIA) PVT LTD JL. Teuku Umar No.20, Kruger Centre, Mumbai-Nashik Highway, Karawaci - Tangerang 15115, Indonesia Atgaon, Shahapur, Thane , India Tel Fax Tel /008/275 - Fax kia@krugerindo.co.id sales@krugerindia.com Chennai: Delhi: Bangalore: Mumbai: Kolkatta: KOREA NEOMATE TECHNOLOGY & CONSULTING CO. LTD , Ace High Tech City B/D, Mullae-dong 3-ga Yeongdeungpo-gu, Seoul, Korea Tel /3 - Fax neomatetnc@chol.com VIETNAM KRUGER VENTILATION INDUSTRIES PTE LTD (Vietnam Representative Office) 4 th floor, HHM Office Building, Xuan Hong St, Tan Binh Dist, Hochiminh City, Vietnam Tel Fax mktg@krugervn.com The company is always improving and developing its products, therefore the company reserves the right to make changes to the illustrated products. Certified dimension will be provided upon request. Edition 1 Printed on June 08

8 Kruger Ventilation Industries Pte Ltd No. 17 Tuas Avenue 10 Singapore Tel Fax CNo. - CAT012.E1 December 2007