Airflow measurement using instrumented inlet rings. The engineer's choice About ebm-papst North America Headquarters - Farmington, CT About ebm-papst worldwide 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 - Acoustic testing chamber that extend beyond our current product line. This is made possible by our - Complete air testing lab on site extensive team of over 650 dedicated engineers and technicians out of our - ISO 9001 and ISO 14001 certifications three central locations in Germany. leading edge EC technology. GreenTech EC motors deliver unparalleled - Distribution centers in Farmington, CT and Toronto, Canada World Headquarters: Mulfingen, Germany free and maintenance-free performance, longer service life, lower noise, GreenTech(R) EC technology: Our motor for the future Virtually our entire product range is now available with GreenTech, the energy efficiency when compared to conventional AC Technology. With wear- ebm-papst is an innovator and market leader in fans, blowers, and - ebm-papst established in 1963 motors with core competencies in motor technology, aerodynamics, and intelligent electronic control, and higher aerodynamic efficiency, GreenTech - 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, - Worldwide revenue over 1.5 billion USD Passion, quality and responsibility: Three reasons for our success Commercial Refrigeration, Heating, Industrial, Lighting, IT / Telecom, Medical, - 57 sales and distribution groups worldwide Only real passion for fans and motors makes the highest level of achievement Transportation and more. - 11,000+ employees worldwide possible. With a clear organizational structure, flat hierarchies and a high - Ship over 46 million products annually degree of personal responsibility, we create the perfect foundation - not - Certifications: ISO 9001, ISO 14001 & RoHS compliant only for technological innovation, but also for excellent service and active - Over 1,000 patents held in design dedication to closely working with our customers. Support when and where you need it Knowledgeable field sales professionals are close by for face-to-face meetings. Dedicated inside sales associates fulfill all of your ordering needs. To assist you with order management, our Customer Relations department provides Core competencies: motor technology, aerodynamics and electronics Of course, our products are also produced with the highest quality - at a total automated services such as shipment notifications, reorder notifications, and Our innovative technologies keep turning into new industrial standards. of 17 facilities worldwide. Our quality management is uncompromising and invoicing. Our advantage: We consider aerodynamic relationships as a whole. Thus is present in every process stage. This is also confirmed by our certification we combine benchmark-setting motor technology with the intelligence of of compliance with the international standards ISO 9001, ISO/TS 16949 state-of-the-art electronics and aerodynamically optimized shapes. and the standard ISO 14001. Design and manufacturing 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, and utilize bar coding for real-time inventory management. Supply chain management programs such as Kanban, demand/pull, safety stock, consignment, and local warehousing can be customized to your needs. 2 3 Worlds in Motion GreenTech The symbol of our commitment Airflow measurement using instrumented inlet rings GreenTech is a name put to the philosophy ebm-papst has used for decades: ebm-papst offers a simple airflow measurement technique for backward- "each new product that we develop has to be better than its predecessor in curved centrifugal fans using modified versions of inlet rings (IR) typically terms of economy and ecology." Our company philosophy is not just for used with these fans to maximize performance. The technique is based designing new and more efficient fans and blowers; it is in practice in the on the Bernoulli and Continuity equations, which allow calculation of offices and factories, locally and internationally. At the U.S. headquarters, two flow through a converging nozzle based upon measurement of the static separate arrays of solar panels have been installed to provide the engineering pressure drop across the nozzle. building with electricity, along with additional renovations that make the facilities even more environmentally friendly. The application is of the form Q = 9.29k * Q = airflow in CFM s/ * P, where: GreenTech symbolizes our continuous commitment, achievements, and passion k = nozzle calibration factor to provide customers with high quality products through the use of modern P = static pressure drop across the nozzle in inches H2O development and production methods, responsible business practices and initiatives that benefit not only the user, but the environment as well. s = standard air density of .075 lbs/ft 3 = actual air density in lbs/ft3 What is EC Technology? The calibration factor "k" has been empirically determined for each EC technology is an important factor in our GreenTech philosophy. ebm-papst IR at standard air density of .075 lbs/ft3. Large variations from EC fans use permanent magnet external rotor DC motors with fully integrated this air density can effect the measurement and can be taken into account using the s/ ration, otherwise this term can be dropped from the equation. electronic commutation (EC) and AC to DC power conversion. EC motors give 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 commutation without wear-and-tear on the motor. The EC motor compares Two types of instrumented inlet rings are available for each to the direct current shunt-wound motor except that the magnetic field is impeller size. One type uses a single pressure tap positioned generated by permanent magnets inside the rotor. near the discharge end of the IR. The 2nd type uses four pressure taps spaced along the circumference of the IR, connected with With this technology, EC motors and fans can be easily controlled, are tubing to form a piezometer ring. The piezometer ring averages maintenance-free, offer outstanding efficiency and have a considerably long the static pressure measurements around the circumference of service life. The variable speed range possible in EC technology makes using a the IR to provide a more accurate flow measurement in case of multitude of individual models a thing of the past. uneven pressure distribution around the inlet. In either case, the customer connection on the inlet ring is to a single pre-mounted Our R&D efforts are not only focused on saving energy. In terms of air tube connector, suitable for pneumatic tubing with an internal performance and low noise, our products exceed the toughest specifications. diameter of 4 mm. This connection should run to the low pressure EC technology pays off for every owner or operator, while conserving precious side of a differential pressure transducer (DPT), while the pressure energy resources. When you use intelligent ebm-papst EC technology in your tap in front of the IR is connected to the high pressure side of the applications, everyone wins - companies, customers, and the environment. DPT. If the DPT is mounted near the front of the IR but out of the airstream, then the high pressure tap on the DPT is suitable and no additional pressure tap is needed. 4 5 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 Impeller & fan type Part no. w/o pressure tap 250 2D AC/EC 250 2D EC 250 3. Select a differential pressure transducer with an appropriate range based on the pressure differential determined in step 2. Part no. with 1 pressure tap Part no. with piezometer ring k-value 96359-2-4013 25002-2-4013 25001-2-4013 69 25020-2-4013 25040-2-4013 25030-2-4013 67 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 87 280 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 120 310 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 - 116 355 3D AC/EC 35560-2-4013 35600-2-4013 35580-2-4013 155 355 3D AC/EC 35561-2-4013 35610-2-4013(1) 35590-2-4013(1) 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 148 400 3D AC/EC + 2D AC 54476-2-4013 54515-2-4013 54500-2-4013 183 400 2D EC 40020-2-4013 40040-2-4013 40030-2-4013 161 400 2D EC + airfoil 40070-2-4013 40075-2-4013 40080-2-4013 188 450 2D AC/EC 54478-2-4013 54514-2-4013 54510-2-4013 217 450 3D AC/EC 63045-2-4013 64015-2-4013 64005-2-4013 214 450 2D EC 45020-2-4013 45040-2-4013 45030-2-4013 225 450 2D EC + airfoil 45070-2-4013 45075-2-4013 45080-2-4013 240 500 2D EC 54480-2-4013 54518-2-4013 54516-2-4013 265 500 2D EC + 3D AC/EC + airfoil 63072-2-4013 64025-2-4013 64002-2-4013 281 560 2D EC + 3D AC/EC + airfoil 63071-2-4013 64030-2-4013 64001-2-4013 348 630 3D AC/EC + airfoil 63070-2-4013 64040-2-4013 64000-2-4013 438 710 3D AC/EC + airfoil 71070-2-4013 71075-2-4013 71080-2-4013 545 (for dimensional reference only) (1) Chart 1 - Pressure Differential vs Air Flow for Available Impeller Sizes 10.000 1.000 delta p [in. H2O] Size (mm) 0.100 impeller size (mm) 250 280 0.010 310 355 400 450 0.001 500 560 630 0.000 10 100 fm] flow [cfm] 1000 10000 Note: Subject to alterations. (1) Short inlet ring. 6 7 www.ebmpapst.us Printed in the USA - 05/2016 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 (c) ebm-papst Inc. 2016. ebm-papst Inc. reserves the right to change any specifications or data without notice. The engineer's choice