WINDER. Impellers with higher efficiency and less sound level
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- Lucinda Barbra Higgins
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1 WINDER Impellers with higher efficiency and less sound level
2 Winder Solutions The last new generation impeller With the Serrated Novovent Concept (S.N.C.), NOVOVENT, S.A. has developed a new blades generation. The S.N.C. is the result of three different research lines. Firstly, we get higher performance due to the sickle blades, secondly, due to the winglet applied at the end of the blade we debug turbulences and thirdly, in order to reduce the sound level we designed a serrated profile at the rear of the blades. The S.N.C. blade compared with the traditional ones gets better performance in airflow and pressure; decreasing the power needs and sound levels about 15%. The new impeller will be applied to all our axial product range. Applied with the Multiflow Novovent System (M.N.S.) gives to NOVOVENT an exclusive range of products and the possibility to offer unique solutions. R+D+I Our technical department is using for the designs and advanced applications the Computational Fluid Dynamic (CFD) and Finite Element Analysis (FEA). Those systems get us pre-designed units, like Winder ones, to delimitate the first steps to check mechanical resistance avoiding possible mechanical failures and to pre-define fluid dynamics performance. These first data are exported to our laboratory to test, check and validate the final design. Acoustic Novovent is equipped with the latest technologies for measuring noise under the norm AMCA (BS848 part 2). Laboratory It is a long process where our R&D department develops new prototypes, tests them in our own laboratory so that we can finally offer them in our catalogue once we are sure that they guarantee the level of quality that our costumers and the market are expecting. Our Laboratory tests all acoustic, electrical and fluid dynamics performance of all fans within two cameras and nozzle entrance test for fans up to 1. mm in diameter, 15. m3/h and 3. pa of static pressure following the international standards, ISO 581:1997, BS 848-1:198 and ANSI / AMCA 21-85:1985.
3 General characteristics AXIAL WINDER Polypropylene frame reinforced with fiber glass for diameters 56 and 63. For bigger diameters, the mounting plate is made of galvanized metal sheet, integrated bell mouth. High efficiency impellers made of aluminum cast according to SERRATED NOVOVENT CONCEPT and MULTIFLOW NOVOVENT SYSTEM, as a high efficiency option, dynamically balanced and closed hub. All the models include epoxy painted grill. Motors class F, protection IP 65 up to 75W, others IP 55. Working temperature: -3 C to 7 C. Airflow: motor - impeller. AXITUB WINDER and AXITUB PIROS WINDER Hot dip galvanized tubular long cased. Including inspection door for models with motor bigger than 7.5kW High efficiency impellers made of aluminum cast according to SERRATED NOVOVENT CONCEPT and MULTIFLOW NOVOVENT SYSTEM, as a high efficiency option, dynamically balanced and closed hub. Airflow: motor - impeller. Axitub Winder: Motors class F, protection IP 65 up to 75W, others IP 55. Working temperature: -3 C to 7 C. Axitub Piros Winder: Motors class H, protection IP 55. Fan certified according to EN (F, F, F). Working temperature: S1: -3 C to 7 C, S2: -3 C to C-2hs / to C-2hs / to C-2hs axi box winder y PIROS BOX WINDER Galvanized metal sheet cabinet with 5 mm rock wool class M. High efficiency impellers made of aluminum cast according to SERRATED NOVOVENT CONCEPT and MULTIFLOW NOVOVENT SYSTEM, as a high efficiency option, dynamically balanced and closed hub. Airflow: motor - impeller Axi Box Winder: Motors class F, protection IP 65 up to 75W, others IP 55. Working temperature: -3 C to 7 C. Piros Box Winder: Motors class H, protection IP 55. Fan certified according to EN (F, F, F). Working temperature: S1: -3 C to 7 C, S2: -3 C to C-2hs / to C-2hs / to C-2hs Options AXIAL WINDER AXITUB WINDER AXITUB PIROS WINDER PIROS BOX WINDER AXI BOX Different tensions, speed and frequencies, 2 speed motors. Another configuration with different performance. Airflow: impeller - motor. Made in stainless steel. Short cased. For max. temperature of C 2h, C 2h. How to get the octave bands from the graphic? Static pressure Pa Airflow m 3 /h , LPA db (A) For instance, we would like to calculate the octave bands for a fan working at 2.5 m 3 /h at 45 Pa. Firstly, we need to get the working point (Q = 23. m 3 /h at 45 Pa). Secondly, from the working point, vertically, we look for the intersection in the acoustic curve. Thirdly, we obtain the value of the sound pressure from the data in the right side of the graph. Once we have the sound pressure (77,4), we subtract the correction factor from the data table. WINDER 4-9T-6 5,5 kw (5 Hz) Airflow m 3 /h Values at 3 m radiated Static pressure mmcda Octaves Value curve 77,4 Correction factor 24,3 12,5 1, 12, 15,9 22,6 24,8 33,1 Total 53,1 64,9 67,4 65,4 61,5 54,8 52,6 44,3
4 Data table V 5Hz (III~) 15 r.p.m. Ø mm ERP CORRECTION FACTOR (Hz) Ø [mm] Q max [m 3 /h] P [kw] q [m 3 /s] pf [Pa] Pe [W] rpm ηe [%] N [db(a)] WINDER 4-56T-4,55kW ,55 1, ,2 77, ,8 15,9 12,1 1,1 15,2 24, 28,7 36,9 WINDER 4-56T-4,75kW ,75 2, ,1 75, 65 12,7 14,3 12,3 12,3 16,4 23,8 28,1 35,4 WINDER 4-56T-4 1,1kW ,1 2, ,1 76, ,1 15,3 13, 13,6 17,6 24,8 28,8 35,5 WINDER 4-63T-4,75kW ,75 2, ,8 76, ,8 15,9 12,1 1,1 15,2 24, 28,7 36,9 WINDER 4-63T-4 1,1kW ,1 3, ,6 79,3 7 12,7 14,3 12,3 12,3 16,4 23,8 28,1 35,4 WINDER 4-63T-4 1,5kW ,5 4, ,1 83, ,1 15,3 13, 13,6 17,6 24,8 28,8 35,5 WINDER 4-71T-6 1,1kW ,1 3, ,6 7,4 7 21,7 16,5 1,3 11, 14,6 21,9 28, 36,5 WINDER 4-71T-6 1,5kW ,5 3, ,7 72, 7 19,7 15,9 1,9 1,5 14,6 21,5 27,1 35, WINDER 4-71T-6 2,2kW ,2 5, ,2 72, ,4 15,3 11, 1,7 14,5 21,3 26,9 34,3 WINDER 4-T-6 3kW , 6, ,7 72, 73 24,3 12,5 1, 12, 15,9 22,6 24,8 33,1 WINDER 4-T-6 4kW , 7, ,8 75, ,4 15,3 11, 1,7 14,5 21,3 26,9 34,3 WINDER 4-T-6 5,5kW ,5 9, ,4 78, ,7 13,3 1,2 11,5 16,8 24,8 29, 35,6 WINDER 4-9T-6 4kW , 7, ,6 71, ,3 11,4 1,6 12,8 17,9 25, 26,9 35,4 WINDER 4-9T-6 5,5kW ,5 9, ,7 74, ,3 12,5 1, 12, 15,9 22,6 24,8 33,1 WINDER 4-9T-6 7,5kW ,5 1, ,2 75,2 8 22,3 12,4 9,9 11,6 15,6 22,4 24,9 32,8 WINDER 4-T-6 7,5kW ,5 9, ,4 73, ,4 11,2 1,3 13,1 18,1 25, 27,8 35,5 WINDER 4-T-6 11kW , 13, ,8 78, ,3 11,4 1,6 12,8 17,9 25, 26,9 35,4 WINDER 4-T-6 15kW , 16, ,4 79, , 11,4 1,2 12,8 18,2 25,3 27,7 35,8 WINDER 4-125T kW ,5 17, ,8 78, ,3 11,4 1,6 12,8 17,9 25, 26,9 35,4 WINDER 4-125T-6 22kW , 24, ,2 82, ,6 13,7 1,4 11,5 15,5 22,8 24,4 33,9 WINDER 4-125T-6 3kW , 28, ,6 82,8 8 22,3 12,4 9,9 11,6 15,6 22,4 24,9 32,8 V 5Hz (III~) r.p.m. Ø mm ERP CORRECTION FACTOR (Hz) Ø [mm] Q max [m 3 /h] P [kw] q [m 3 /h] pf [Pa] Pe [W] rpm ηe [%] N [db(a)] WINDER 6-56T-4,18kW ,18 1, ,7 63, ,1 15,3 13, 13,6 17,6 24,8 28,8 35,5 WINDER 6-56T-4,25kW ,25 1, ,1 61, ,1 15,3 13, 13,6 17,6 24,8 28,8 35,5 WINDER 6-56T-4,37kW ,37 1, ,1 65, ,1 15,3 13, 13,6 17,6 24,8 28,8 35,5 WINDER 6-63T-4,25kW ,25 1, ,5 62, ,1 15,3 13, 13,6 17,6 24,8 28,8 35,5 WINDER 6-63T-4,37kW ,37 2, ,3 67,8 7 14,1 15,3 13, 13,6 17,6 24,8 28,8 35,5 WINDER 6-63T-4,55kW ,55 3, ,7 7, ,1 15,3 13, 13,6 17,6 24,8 28,8 35,5 WINDER 6-71T-6,37kW ,37 2, ,2 6,8 7 17,4 15,3 11, 1,7 14,5 21,3 26,9 34,3 WINDER 6-71T-6,75kW ,75 3, ,8 69, 71 19,7 15,9 1,9 1,5 14,6 21,5 27,1 35, WINDER 6-71T-6 1,5kW ,5 2, ,8 66,1 7 15,9 15,3 12, 11,4 15,4 21,6 26,8 33,4 WINDER 6-T-6 1,1kW ,1 4, ,8 68, ,3 11,4 1,6 12,8 17,9 25, 26,9 35,4 WINDER 6-T-6 1,5kW ,5 5, ,1 71, ,3 12,5 1, 12, 15,9 22,6 24,8 33,1 WINDER 6-T-6 2,2kW ,2 6, ,3 75, 73 22,3 12,4 9,9 11,6 15,6 22,4 24,9 32,8 WINDER 6-9T-6 1,1kW ,1 4, ,2 66, ,3 11,4 1,6 12,8 17,9 25, 26,9 35,4 WINDER 6-9T-6 1,5kW ,5 6, ,9 69, ,6 13,7 1,4 11,5 15,5 22,8 24,4 33,9 WINDER 6-9T-6 2,2kW ,2 7, ,2 71,3 8 22,3 12,4 9,9 11,6 15,6 22,4 24,9 32,8 WINDER 6-T-6 2,2kW ,2 6, ,9 7, ,3 11,5 11, 13,7 19, 26, 28,6 36,5 WINDER 6-T-6 3kW , 8, , 77, , 11, 1,6 13,4 18,4 25,3 28, 36,3 WINDER 6-T-6 5,5kW ,5 11, ,7 75, ,4 11,2 1,3 13,1 18,1 25, 27,8 35,5 WINDER 6-125T-6 5,5kW ,5 11, ,4 75, ,6 13,7 1,4 11,5 15,5 22,8 24,4 33,9 WINDER 6-125T-6 7,5kW ,5 15, , 8, ,3 12,4 9,9 11,6 15,6 22,4 24,9 32,8 WINDER 6-125T-6 11kW , 18, ,1 79,2 8 28,3 11,4 1,6 12,8 17,9 25, 26,9 35,4 CM = Measurement category: D CE = Efficiency category: Total SR = Specific ratio: 1 VSD = Variable speed drive: NO pf = Fan total pressure psf = Fan static pressure pe = Power measured at the main input terminals to the motor ηe [%] = Overall efficiency N = Efficiency grade
![[db(a)],75kw 1,1kW 67](/docs-images/94/121862640/images/5-2.jpg "31º,55kW 66 37º 31º 37º 1")
![[db(a)] 1,1kW 1 2º 2º 28º](/docs-images/94/121862640/images/5-4.jpg "68,75kW 2º 28º 5 15 5 15 4")
5 Performance data 4 Poles - Ø º 37º [db(a)],75kw 1,1kW 67 31º,55kW 66 37º 31º 37º Poles - Ø º ,5kW [db(a)] 1,1kW 1 2º 2º 28º 68,75kW 2º 28º Poles - Ø ,2kW º º [db(a)] ,5kW 1 1,1kW 23º
6 Performance data 4 Poles - Ø ,5kW º [db(a)] 4kW kW 3º 74 3º Poles - Ø ,5kW [db(a)] 5,5kW kW
![81 1 8 [db(a)] 11kW 2º](/docs-images/94/121862640/images/7-2.jpg "79 7,5kW 2º 2º 8 4")
7 Performance data 4 Poles - Ø kW [db(a)] 11kW 2º 79 7,5kW 2º 2º 8 4 Poles - Ø kW [db(a)] 22kW ,5kW
8 Performance data 6 Poles - Ø ,37kW 6 31º 37º 59 [db(a)],25kw º 37º,18kW 31º 37º 56 6 Poles - Ø ,55kW º [db(a)],37kw º 28º 28º 2º 2º,25kW
9 Performance data 6 Poles - Ø ,5,75kW º [db(a)] ,5 1,5kW 5 5,37kW 23º 62 23º , Poles - Ø ,2kW º [db(a)] 1,5kW ,1kW º 3º
10 Performance data 6 Poles - Ø ,2kW [db(a)] 1,5kW ,1kW Poles - Ø ,5kW [db(a)] 3kW 2º º 2º 2,2kW Poles - Ø ,5 11kW 81 8,5 8 79,5 [db(a)] 7,5kW 79 78,5 5,5kW 78
11 Advantages winder impellers versus traditional ones Better performances with less sound level On this graph, we can be observed the advantages of the winder impellers versus the traditional ones. The sickle form from the blade (A) will enable better performances. Static pressure Pa LPA db (A) If we add to the sickle blade the winglet (B) we will get a high reduction in turbulences. And finally, adding the serrated profile (C) we still increasing the performance and we reduce significantly the sound level. The combination of the winglet, the serrated profile and the sickle form gets a better performance in airflow and pressure, decreasing the sound level. Airflow m 3 /h 7,5 Conventional impeller Impeller with sickle form Impeller with sickle form with winglet Impeller with sickle form with winglet and serrated profile (WINDER) Wu (kw) Better performances, less power needs This graph shows a comparison between winder model and conventional fan using the same diameter and similar performance. Winder solution is able to provide more airflow with less consumption. Winder needs a 5,5 kw motor meanwhile conventional fan needs 7,5 kw motor as illustrated. Static pressure Pa 5,5 Airflow m 3 /h C A The impellers with sickle form get better airflow and pressure all along the effective curve. The serrated profile reduces significantly the sound originated by the turbulences. B The winglet removes all the turbulences originated at the end of the blade.
12 Dimensions AXIAL WINDER Ø A B C D E F , , , , , , AXITUB WINDER / AXITUB PIROS WINDER A Ø B Ø C Ø D E x x x x 22, x 22, x 22, x 22,5 PIROS BOX WINDER / AXI BOX WINDER A B C D E A B C D * Orientative dimensions. innovative ventilation system Josep Finestres, 9 83 BARCELONA Spain Tel Fax novovent@novovent.com
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