Airflow measurement using instrumented inlet rings. The engineer’s choice About ebm-papst North America About ebm-papst worldwide Headquarters - Farmington, CT Passionate about air technology and drive engineering The system solution that results from these three core competencies has – 250,000 square feet The ebm-papst product portfolio numbers over 15,000 products. We offer a synergy that is unique in all the world and makes up the majority of our – 275 employees the right solution for almost every air technology and drive engineering product line. – Contract manufacturing task. In addition, we work with you to develop very customized solutions ® GreenTech EC technology: Our motor for the future – Acoustic testing chamber that extend beyond our current product line. This is made possible by our Virtually our entire product range is now available with GreenTech, the – Complete air testing lab on site extensive team of over 650 dedicated engineers and technicians out of our – leading edge EC technology. GreenTech EC motors deliver unparalleled ISO 9001 and ISO 14001 certifications three central locations in Germany. – energy efficiency when compared to conventional AC Technology. With wear- Distribution centers in Farmington, CT and Toronto, Canada World Headquarters: Mulfingen, Germany free and maintenance-free performance, longer service life, lower noise, ebm-papst is an innovator and market leader in fans, blowers, and – ebm-papst established in 1963 intelligent electronic control, and higher aerodynamic efficiency, GreenTech motors with core competencies in motor technology, aerodynamics, and – Manufacturing: Germany, Hungary, USA, Slovenia, India, China, Czech EC motors from ebm-papst are the future of air moving technology. electronics. With over 15,000 products, we provide solutions to a wide Republic and Italy range of markets including Air-conditioning and Ventilation, Appliance, Passion, quality and responsibility: Three reasons for our success – Worldwide revenue over 1.5 billion USD Commercial Refrigeration, Heating, Industrial, Lighting, IT / Telecom, Medical, Only real passion for fans and motors makes the highest level of achievement – 57 sales and distribution groups worldwide Transportation and more. possible. With a clear organizational structure, flat hierarchies and a high – 11,000+ employees worldwide degree of personal responsibility, we create the perfect foundation - not – Ship over 46 million products annually Support when and where you need it only for technological innovation, but also for excellent service and active – Certifications: ISO 9001, ISO 14001 & RoHS compliant Knowledgeable field sales professionals are close by for face-to-face meetings. dedication to closely working with our customers. – Over 1,000 patents held in design Dedicated inside sales associates fulfill all of your ordering needs. To assist you with order management, our Customer Relations department provides Of course, our products are also produced with the highest quality - at a total Core competencies: motor technology, aerodynamics and electronics automated services such as shipment notifications, reorder notifications, and of 17 facilities worldwide. Our quality management is uncompromising and Our innovative technologies keep turning into new industrial standards. invoicing. is present in every process stage. This is also confirmed by our certification Our advantage: We consider aerodynamic relationships as a whole. Thus of compliance with the international standards ISO 9001, ISO/TS 16949 we combine benchmark-setting motor technology with the intelligence of Design and manufacturing and the standard ISO 14001. state-of-the-art electronics and aerodynamically optimized shapes. Beginning with the initial product concept, our application engineers work in tandem with customers to select the best air moving solution to suit specific goals and requirements. Once the prototype has been established, it can then be tested in our state-of-the-art airflow testing chambers to optimize performance. Each chamber has been designed to meet AMCA 210 and ISO 5801 requirements. In addition to our airflow testing capabilities, ebm-papst can conduct comparative sound, temperature, and velocity tests. The electrical engineering team can design everything from simple fan controllers for monitoring fan speed to complex controllers and power supplies, filtering, and specific communication protocols. Logistics and inventory management programs Our facilities feature over 90,000 square feet of climate-controlled warehousing, Supply chain and utilize bar coding for real-time inventory management. management programs such as Kanban, demand/pull, safety stock, consignment, and local warehousing can be customized to your needs. 2 3 3 Worlds in Motion GreenTech Airflow measurement using instrumented inlet rings The symbol of our commitment ebm-papst offers a simple airflow measurement technique for backward- GreenTech is a name put to the philosophy ebm-papst has used for decades: curved centrifugal fans using modified versions of inlet rings (IR) typically “each new product that we develop has to be better than its predecessor in used with these fans to maximize performance. The technique is based terms of economy and ecology.” Our company philosophy is not just for on the Bernoulli and Continuity equations, which allow calculation of designing new and more efficient fans and blowers; it is in practice in the flow through a converging nozzle based upon measurement of the static offices and factories, locally and internationally. At the U.S. headquarters, two pressure drop across the nozzle. separate arrays of solar panels have been installed to provide the engineering building with electricity, along with additional renovations that make the / • The application is of the form Q = 9.29k • P, where: facilities even more environmentally friendly. s Q = airflow in CFM k = nozzle calibration factor GreenTech symbolizes our continuous commitment, achievements, and passion ∆P = static pressure drop across the nozzle in inches H O to provide customers with high quality products through the use of modern 2 3 = standard air density of .075 lbs/ft development and production methods, responsible business practices and s 3 = actual air density in lbs/ft initiatives that benefit not only the user, but the environment as well. The calibration factor "k" has been empirically determined for each What is EC Technology? 3 IR at standard air density of .075 lbs/ft . Large variations from EC technology is an important factor in our GreenTech philosophy. ebm-papst this air density can effect the measurement and can be taken into EC fans use permanent magnet external rotor DC motors with fully integrated / account using the ration, otherwise this term can be dropped electronic commutation (EC) and AC to DC power conversion. EC motors give s from the equation. the flexibility of connecting to AC mains with the efficiency and simple speed control of a DC motor. With EC fans, the user benefits from the innovative Two types of instrumented inlet rings are available for each commutation without wear-and-tear on the motor. The EC motor compares impeller size. One type uses a single pressure tap positioned to the direct current shunt-wound motor except that the magnetic field is near the discharge end of the IR. The 2nd type uses four pressure generated by permanent magnets inside the rotor. taps spaced along the circumference of the IR, connected with tubing to form a piezometer ring. The piezometer ring averages With this technology, EC motors and fans can be easily controlled, are the static pressure measurements around the circumference of maintenance-free, offer outstanding efficiency and have a considerably long the IR to provide a more accurate flow measurement in case of service life. The variable speed range possible in EC technology makes using a uneven pressure distribution around the inlet. In either case, the multitude of individual models a thing of the past. customer connection on the inlet ring is to a single pre-mounted tube connector, suitable for pneumatic tubing with an internal Our R&D efforts are not only focused on saving energy. In terms of air diameter of 4 mm. This connection should run to the low pressure performance and low noise, our products exceed the toughest specifications. side of a differential pressure transducer (DPT), while the pressure EC technology pays off for every owner or operator, while conserving precious tap in front of the IR is connected to the high pressure side of the energy resources. When you use intelligent ebm-papst EC technology in your DPT. If the DPT is mounted near the front of the IR but out of the applications, everyone wins - companies, customers, and the environment. airstream, then the high pressure tap on the DPT is suitable and no additional pressure tap is needed. 5 4 Inlet Ring Part Numbers Instrumented Inlet Rings Inlet Ring Part Numbers Select Pressure Transducer Range Find the proper instrumented inlet ring P/N based on the impeller size and type (e.g., 3D EC). Choose the P/N for either the inlet ring with a single pressure It's important to the accuracy of the flow measurement to select a differential pressure transducer (DPT) with a range appropriate to the expected pressure tap or for the version with multiple taps connected in a piezometer ring. In cases where there are multiple listings for a single impeller size, please discuss the differential. It's best to choose a DPT with a range that exceeds the maximum expected pressure differential by a small safety margin. Excessive range will choice of the correct inlet ring with an ebm-papst applications engineer. impact the flow measurement accuracy because the DPT accuracy is typically specified as a percent of full scale. To find the proper pressure transducer range: 1. Determine the maximum CFM flow rate expected from the fan over its operating range as installed in the application. If this info isn't available, use the free airflow as provided in the fan specification. 2. Use Chart 1 to find the pressure differential in inches w.g. for given flow and impeller size. Inlet Rings 3. Select a differential pressure transducer with an appropriate range based on the pressure differential determined in step 2. Part no. w/o pressure tap Size (mm) Impeller & fan type Part no. with 1 pressure tap Part no. with piezometer ring k-value (for dimensional reference only) 250 2D AC/EC 96359-2-4013 25002-2-4013 25001-2-4013 69 250 2D EC 25020-2-4013 25040-2-4013 25030-2-4013 67 250 2D EC + airfoil 25070-2-4013 25075-2-4013 25080-2-4013 70 280 2D AC/EC 96360-2-4013 28002-2-4013 28001-2-4013 88 280 2D EC 28020-2-4013 28040-2-4013 28030-2-4013 87 Chart 1 - Pressure Differential vs Air Flow for Available Impeller Sizes 280 2D EC + airfoil 28070-2-4013 28075-2-4013 28080-2-4013 93 310 3D AC/EC 31050-2-4013 31100-2-4013 31080-2-4013 120 (1) 10.000 310 3D AC/EC 31051-2-4013 31110-2-4013 31090-2-4013 103 310 2D EC 31020-2-4013 31060-2-4013 31040-2-4013 108 310 2D EC 31570-2-4013 31575-2-4013 31580-2-4013 116 310 airfoil 31470-2-4013 31475-2-4013 – 116 1.000 355 3D AC/EC 35560-2-4013 35600-2-4013 35580-2-4013 155 (1) (1) 355 3D AC/EC 35561-2-4013 35610-2-4013 35590-2-4013 138 355 2D EC 35520-2-4013 35540-2-4013 35530-2-4013 141 355 2D EC + airfoil 35670-2-4013 35675-2-4013 35680-2-4013 148 0.100 impeller 400 3D AC/EC + 2D AC 54476-2-4013 54515-2-4013 54500-2-4013 183 size (mm) 400 2D EC 40020-2-4013 40040-2-4013 40030-2-4013 161 250 400 2D EC + airfoil 40070-2-4013 40075-2-4013 40080-2-4013 188 280 0.010 450 2D AC/EC 54478-2-4013 54514-2-4013 54510-2-4013 217 310 450 3D AC/EC 63045-2-4013 64015-2-4013 64005-2-4013 214 355 450 2D EC 45020-2-4013 45040-2-4013 45030-2-4013 225 400 450 2D EC + airfoil 45070-2-4013 45075-2-4013 45080-2-4013 240 450 0.001 500 2D EC 54480-2-4013 54518-2-4013 54516-2-4013 265 500 500 2D EC + 3D AC/EC + airfoil 63072-2-4013 64025-2-4013 64002-2-4013 281 560 560 2D EC + 3D AC/EC + airfoil 63071-2-4013 64030-2-4013 64001-2-4013 348 630 630 3D AC/EC + airfoil 63070-2-4013 64040-2-4013 64000-2-4013 438 0.000 10 100 1000 10000 710 3D AC/EC + airfoil 71070-2-4013 71075-2-4013 71080-2-4013 545 fm] flow [cfm] (1) Note: Subject to alterations. Short inlet ring. 7 6 delta p [in. H2O] Printed in the USA - 05/2016 www.ebmpapst.us ebm-papst Inc. North America 100 Hyde Road Farmington, CT 06034 Phone + 1 860-674-1515 Fax + 1 860-674-8536 sales@us.ebmpapst.com © ebm-papst Inc. 2016. ebm-papst Inc. reserves the right to change any specifications or data without notice. The engineer’s choice