Industrial Fans. 52nd North Carolina Industrial Ventilation Conference BA Centrifugal Fans. Axial Fans. Other Types

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1 5nd Noth Caolina Indutial Vntilation Confnc INDUSTRIAL FANS Indutial Fan ntd by Bill Howath Vic idnt Illinoi Blow, Inc. Cay, Illinoi MODULE TOICS FAN IN AIR SYSTEM FAN TYES FAN TESTING AIR DENSITY FAN SAFETY 1 FAN S ROLE IN AIR SYSTEM Th pupo of a fan i to upply an ai ytm with ngy (in th fom of pu) ncay to maintain aiflow. Cntifugal Fan Ai tun 90 though th fan. FAN TYES Axial Fan Ai Flow taight though th fan. Oth Typ Spcial Dign Fan. 4 CENTRIFUGAL FAN TYES Diffnt Dign typ a ud to match Sytm ai flow and tatic pu quimnt. Th Inlt and Outlt Siz dca lativ to houing diamt a th pu dvlopd inca. CENTRIFUGAL FAN TYES Cntifugal Fan ud in high pu low flow, cooiv, o matial handling ytm. Th Inlt and Outlt Siz dca lativ to houing diamt a th pu dvlopd inca. Gnally outlt vlocity Rang of 150 to 6000 FM Outlt Vlocity Cntifugal Fan pu capabiliti: Backwad Cuvd Cntifugal up to 0 S Indutial Exhaut up to 46 S u Blow up to 14 S Tubo u Blow up to 100 S 5 6 BA-5-1 1

2 5nd Noth Caolina Indutial Vntilation Confnc AXIAL FAN TYES AXIAL FAN TYES Diffnt popll typ a ud to match Sytm ai flow and tatic pu quimnt. Th popll hub diamt inca lativ to th fan diamt a th pu dvlopd inca. Axial Fan ud in high flow low pu ytm. Gnally outlt vlocity Rang of 1000 to 4000 FM Outlt Vlocity Axial Fan u capabiliti: Gnal Vntilation Fan to 1/ S Duct Fan to 1 1/4 S Duct Axial to 5 S Van Axial to OTHER AIR MOVING DEVICES FAN SYSTEM CALCULATION Spcial Dign In Lin Cntifugal Mixd Flow Cntifugal ow Roof Vntilato Axial ow Roof Vntilato Ejcto ACGIH Vlocity u Mthod Calculation Sht Calculat th quid flow though th ytm. Calculat l th tatic ti pu quid to mov th quid flow. SYSTEM S S out S in V in SYSTEM S povid th Fan S SYSTEM CFM = FLOW CFM & S will dvlop a Sytm Cuv u Sytm Lo CFM CFM C x V C Aa x 1097 Sytm Calculation Flow o Capacity u Rquimnt Sytm Ritanc Cuv Sytm Lo lottd x 75 Contant x CFM u S v. CFM H v. CFM Rquid S Aiflow Did CFM Sytm Cuv Slct a fan which will gnat th quid pu at th did aiflow. o w 11 1 BA-5-1

3 5nd Noth Caolina Indutial Vntilation Confnc Oth Conidation Aitam Matial though th fan Exploiv o Flammabl Matial Contaminatd o Cooiv Elvatd Tmpatu hyical Limitation Fan Siz and Typ Blt Div v. Dict Div Mounting Aangmnt Matial Fit Cot, Opating Cot, Maintnanc Cot Oth Facto including colo 1 RATING TABLES AND ERFORMANCE ROGRAMS Slction and ating aa a dfind by th Manufactu, Uually only good lction a hown. Fan fomanc tabl a at Standad Condition (75 lb./ft. ai dnity.) Comput Softwa i availabl to povid lction and pfomanc cuv. Th AMCA Ctifid Rating ogam inu manufactu ating. 14 Rating will includ not on how th fan wa ttd Opn o Ductd Inlt Opn o Ductd Outlt Blt lo may not b includd in th pfomanc ating. Accoi includd in th tt ROBLEM Fan Slction Sytm Handling Standad Ai Givn: A ytm with th following dign condition. Sytm tatic pu (SS) of 1.8 w.g. and volumtic flow at (Q) of 560 cfm. If a fan with th attachd tabl i lctd, u th tabl to find Find: Th appopiat pm and hopow quimnt fo th fan tatic pu (FS) lctd fo you dign ROBLEM FAN ERFORMANCE Manufactu povid fan pfomanc at many pd and pu. Th Fan Law a ud to calculat pfomanc uing wll tablihd mthod. Th Aodynamic fomanc Tt Th a many typ of fan. Fo ach typ, th may b many iz. All fan hav on thing in common: Accuat pdiction of aodynamic pfomanc qui a tt at: Contant Spd, Known Dnity BA-5-1

4 5nd Noth Caolina Indutial Vntilation Confnc FAN ERFORMANCE Th Aodynamic fomanc Tt AMCA Standad 10 - "Laboatoy Mthod of Tting Fan fo Ctifid Aodynamic fomanc Rating AMCA Standad 0 - "Fild fomanc Maumnt of Fan Sytm" Tt Equipmnt Mau Flow (indictly) itot tub tav Flow Nozzl Flow Maumnt Station Mau Fan u Inlt u Outlt u Mau Fan ow Mau Fan Spd Mau Tmpatu Dy Bulb Tmp. Wt Bulb Tmp. Baomtic u Sytm Ai Tmp. 19 FAN LAB EXERCISE Dvlop Fan Cuv fo th Lab Fan. Givn: A fan and tt quipmnt in th fan lab dvlop a fan pfomanc cuv fo th fan Fan fomanc Tt Ambint DB Tmp. Wt Bulb Tmp. Baomtic u oint Flow u ow Spd FAN LAB EXERCISE THE FAN LAWS Fan fomanc Tt Ambint DB Tmp. Wt Bulb Tmp. Baomtic u oint Flow u ow Spd Fan fomanc Cuv Flow (CFM) Th Fan Law a ud to calculat fan pfomanc at: Oth Spd, Oth Dniti, Oth Fan Siz DIA RM Fit Law: CFM CFM 1 DIA1 RM DIA RM Scond Law: S S1 DIA1 RM 1 Thid Law: DIA RM H H1 DIA1 RM1 1 1 THE FAN LAWS u Aiflow Chang in Spd o w Slct fan fo Stabl Opating oint Intaction of Fan fomanc Cuv and Sytm Cuv Th i only on intction btwn th fan cuv and ytm cuv. Fan a load matching dvic. Fan handl ACFM only. u Aiflow o w 4 BA-5-1 4

5 Flow (CFM) Fan fomanc Cuv Flow ( C FM ) 5nd Noth Caolina Indutial Vntilation Confnc FAN RATING ROBLEM Fan Adjutmnt Sytm Handling Toxic Ai Givn: In a hood ytm additional vlocity may b quid whn handling highly volatil o toxic matial. If th vlocity mut b doubld uing a VFD what i th impact on th fan? Find: CFM S BH RM Rquid Fan fomanc Rq CFM Rq S Rq BH Rq RM Fan fomanc Cuv oint Flow u ow Spd Act CFM Act S Act BH Avg RM , oint Flow u ow Spd , , , , ,70 u (in WG) FAN RATING ROBLEM Fan Adjutmnt Sytm Handling Toxic Ai Givn: In a hood ytm additional vlocity may b quid whn handling highly volatil o toxic matial. If th vlocity mut b doubld uing a VFD what i th Rquid Fan fomanc Fan fomanc Cuv impact on th fan? Rq CFM Rq S Rq BH Rq RM Find: CFM S BH RM ,701 Flow u ow Spd oint , , , , ,69 CFM S BH Avg RM Act Act Act ,79 Flow u ow Spd oint , , , , , FAN ARRANGEMENT STANDARD AIR AMCA Standad Div Aangmnt: Cntifugal o Axial Blt Div, Dict Div, and Dict Coupld Aangmnt Standad ai i th fnc ga fo: Fan fomanc Rating Ai Sytm Dign Standad Dnity i 75 lb. / ft. SCFM i not qual to ACFM 7 8 AIR DENSITY Dnity ffct Fan and Sytm fomanc. Dnity at a givn tmpatu and baomtic pu can b calculatd: lbm Ab. p. 75 x ft 9.9 x in.hg 460F 70F 460F Tmp. AIR DENSITY Indutial Vntilation Manual calculat dnity uing Dnity Facto: df df dfp df T dfm df [1 (6.710 )(z)] df p (407 S) (407) df T (50) (T 460) df (1 ) ( ) m BA-5-1 5

6 5nd Noth Caolina Indutial Vntilation Confnc FAN DENSITY ROBLEM Fan Dnity Sytm Handling Ai Givn: A Fan opating at 450 F. at 1000 ASL on a day whn th local aipot wath tation pot th baomtic pu of 0.0 Hg. find FAN DENSITY ROBLEM Fan Dnity Sytm Handling Ai Givn: A Fan opating at 450 F. at 1000 ASL on a day whn th local aipot wath tation pot th baomtic pu of 0.0 Hg. find Find: Th dnity of th ai going though th fan. If th fan i poducing 8 p and qui 10 H what will th pu and pow b at 70 F.? df df df df df p T m df [1 (6.710 )(z)] df (407 S) (407) p df (50) (T 460) T df (1 ) ( ) m dft=(50)/( ) ) df df df p df T df m dft= Df=[1-(6.7*10-6 )()] 5.5 df [1 (6.710 )(z)] Df= df p (407 S) (407) Dfp df T (50) (T 460) Sp/df df m (1 ) ( ) hp*/df FAN FLOW RATE ROBLEM FAN FLOW RATE ROBLEM Effct of tmpatu on flow at Givn: 0,000 cfm of ai, with no moitu, i flowing in a duct. Th ai i hatd to 450 o F. Configuation i locatd at a lvl. Find: Th dnity (), dnity facto (df) and flow at (Q) downtam fom th hat input. Effct of tmpatu on flow at Givn: 0,000 cfm of ai, with no moitu, i flowing in a duct. Th ai i hatd to 450 o F. Configuation i locatd at a lvl. Solution 4 Lo In A Ral Ai Sytm: Fan a pfomanc ttd und laboatoy condition with manufactu atd inlt and dichag connction. Sytm Effct a th timatd lo in fan pfomanc fom nonunifom aiflow. SYSTEM EFFECT SYSTEM EFFECT A Sytm Effct Facto i addd to th calculatd ytm itanc and th fan i lctd fo a high pu point. Th fan will opat at th oiginally calculatd ytm itanc. Indutial Vntilation and Fan and Sytm AMCA ublication 01 contain additional infomation on Sytm Effct. 5 6 BA-5-1 6

7 5nd Noth Caolina Indutial Vntilation Confnc SYSTEM EFFECT What i th Sytm Effct and incad opating cot aociatd with intallation lik th? FAN SAFETY Fan contain moving pat and can b dangou. Intall guad. Know th Hiddn Dang Suction and u Windmilling Tmpatu Noi and Envionmnt Stobocopic Effct Spcial upo Fan and Sytm Hav a lock out pocdu. AMCA ublication , "Rcommndd Safty actic Fo U and Intall of Indutial and Commcial Fan" i an xcllnt ouc. 7 8 ROBLEM ROBLEM U of tabl fo fan lction fo non-tandad ai condition Givn: A ytm ha a flow at of 560 acfm and a dignd ytm tatic pu of and i to opat at an lvation of 7,666 ft. Compaativ fan iz fo diffnt hat location Find: SS and lct appopiat fan (FS, RM, BH) fo th two ytm aangmnt. U Catalog. Sytm locatd at a lvl. Find: Th FS and H and pm (in th accompanying fan tabl) which mut b lctd to div th ytm a dignd CONCLUSION INSECTION & MAINTENANCE op Fan Application, Slction, Intallation, and Maintnanc will ult in xcllnt Fan Sytm opation. Inpction and outin maintnanc on a piodic chdul of fan quipmnt i ncay. Hitoical cod of fan condition and maintnanc hould b maintaind and compad with cunt condition a thy a indicato of upcoming poblm. Monito and cod vibation lvl. Suddn chang in fan pfomanc, noi, o vibation lvl a oftn a pcuo to bakdown. Fan hould b inpctd fo condition, matial buildup, and oion BA-5-1 7

8 5nd Noth Caolina Indutial Vntilation Confnc Indutial Fan ntd by Bill Howath hon: (847) Fax: (847) Illinoi Blow, Inc., 750 Indutial Div Cay, Illinoi BA-5-1 8