Download or read book Test Method for Measuring Performance of Engine Cooling Fans written by Cooling Systems Standards Committee and published by . This book was released on 2019 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: This SAE Recommended Practice is intended for use in testing and evaluating the approximate performance of engine-driven cooling fans. This performance would include flow, pressure, and power. This flow and pressure information is used to estimate the engine cooling performance. This power consumption is used to estimate net engine power per SAE J1349. The procedure also provides a general description of equipment necessary to measure the approximate fan performance.The test conditions in the procedure generally will not match those of the installation for which cooling and fuel consumption information is desired. The performance of a given fan depends on the geometric details of the installation, including the shroud and its clearance. These details should be duplicated in the test setup if accurate performance measurement is expected. The performance at a given air density and speed also depends on the volumetric flow rate, or the pressure rise across the fan, since these two parameters are mutually dependent. These parameters depend on the pressure drop across the radiator core and the ram pressure due to vehicle motion. For these reasons, the test procedure should be recognized as providing only an approximate measure of installed fan performance.Although the test procedure is based on running the fan with a motoring dynamometer, the actual installation can be used as a test fixture if an accurate torque meter is available. In this case, the same qualifications discussed apply.For the effect of a fan clutch in reducing fan use and power consumption, which is not a part of this procedure, refer to SAE J1342.Performance testing of electric cooling fan assemblies is covered in SAE J2867. This document has been updated to improve readabilty and clarity, and Figure 1 moved to its appropriate section.
Download or read book Laboratory Testing of Light Duty Vehicle Electric Cooling Fan Assemblies for Airflow Performance written by Cooling Systems Standards Committee and published by . This book was released on 2014 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: This SAE Recommended Practice is intended for use in testing and evaluating the performance of Light Duty automotive electric engine cooling fans. These Electric Cooling Fan (ECF) Assemblies are purchased by Light Duty Truck and Passenger Car OEM's from suppliers. They are purchased as complete assemblies, consisting of the fan(s), motor(s), and shroud (see Figure 1); this Recommended Practice will only consider such complete assemblies. Some purchased assemblies using brush-type motors may also include control devices such as power resistors or pulse width modulation (PWM) electronics for speed control. In the case of brushless motor technology, the controller is an integral part of the motor where it also performs the commutation process electronically. The performance measurement would include fan output in terms of airflow and pressure, and fan input electric power in terms of voltage and current. This information could then be used to calculate the efficiency of the assembly, including aerodynamic efficiency of the fan and shroud and electrical efficiency of the motor. The electric power consumption could be used to estimate vehicle energy as it relates to electrical charging system sizing and fuel economy.The test conditions in the procedure generally will not always match those of the installation for which cooling, electric energy consumption and fuel consumption information is desired. The performance of a given fan depends on the installation details of the application, including the effects of system resistance and geometry of the grille, heat exchangers and underhood geometry of the engine and other underhood components. These details should be duplicated in the test setup, to the greatest extent possible, if accurate performance measurement is expected. Vehicle level airflow performance will also be affected by the bumper profile and any other shape that would influence how the airflow enters the grille. Includes Fan, Motor, Shroud, Stators, Electrical Connector and Pressure Relief Flaps for High Vehicle Speed Applications This Recommended Practice is intended to describe a Standard method for measuring the performance characteristics of electric cooling fans (ECF), also known as "electric motor fans" or "electric motor driven fans". Today, there is a wide range of conditions under which OEM's request and/or ECF Suppliers measure and report performance. This current condition results in unnecessary variation in the data and its interpretation, making it difficult to use the data for vehicle performance prediction and even to accurately compare the performance of fans from different suppliers or even from the same supplier. The major ECF suppliers support the concept of having an Industry Standard for Performance Measurement.
Download or read book TEST METHOD FOR MEASURING POWER CONSUMPTION OF ENGINE COOLING FANS written by Cooling Systems Standards Committee and published by . This book was released on 1989 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: This SAE Recommended Practice is intended for use in testing and evaluating the approximate power consumption of engine cooling fans. This power consumption would then be used to estimate net engine power per SAE J1349. The procedure also provides a general description of equipment necessary to measure the approximate fan power consumption in a vehicle installation.The test conditions in the procedure generally will not match those of the installation for which fuel consumption information is desired. The power required by a given fan depends on the geometric details of the installation, including the shroud and its clearance. These details should be duplicated in the test setup if accurate power measurement is expected. Required power at a given air density and speed also depend on the volumetric flow rate, or else the pressure rise across the fan, since these two parameters are mutually dependent. These parameters depend on the pressure drop across the radiator core and the ram pressure due to vehicle motion. Core drop and ram pressure tend to offset each other, but can be expected to cancel one another at only one vehicle speed at most. Tests run in the absence of the radiator core will not impose the proper pressure-rise requirement on the fan. Tests run with the radiator core in place will impose a greater pressure-rise requirement on the fan than it will likely experience at high vehicle speeds, when part of the rise will be provided by ram air. For these reasons, the test procedure should be recognized as providing only an approximate measure of installed fan power.Although the test procedure is based on running the fan with a motoring dynamometer, the actual installation can be used as a test fixture if an accurate torque meter is available. In this case, the same qualifications discussed apply. Finally, for the effect of a fan clutch in reducing fan use and power consumption, which is not a part of this procedure, refer to SAE J1342.
Download or read book TEST METHOD FOR MEASURING POWER CONSUMPTION OF TRUCK AND BUS ENGINE FANS written by Cooling Systems Standards Committee and published by . This book was released on 1983 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: The test procedure is intended for use in testing and evaluating the approximate power consumption of heavy truck and bus engine cooling fans. The procedure also provides a general description of the equipment necessary to measure fan power consumption, so that the parasitic power consumption of a complete vehicle may be predicted.The test conditions in the procedure may not adequately match those of the vehicle for which fuel consumption information is desired. In that case, engineering estimates or extrapolations may be necessary. The procedure neglects the pressure drop caused by the radiator core (unless the actual vehicle is used as a test fixture). The effect of ram air due to vehicle motion is also neglected. Those two effects tend to offset each other. Finally, the effect of a fan clutch in reducing fan use and power consumption is not a part of this procedure.
Download or read book TEST METHOD FOR MEASURING POWER CONSUMPTION OF COOLING FANS FOR TRUCKS AND BUSES written by Cooling Systems Standards Committee and published by . This book was released on 1981 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: The testing technique outlined in this SAE Recommended Practice was developed as part of an overall program for testing and evaluating fuel consumption of heavy-duty trucks and buses. The technique outlined in this recommended practice provides a general description of the type of equipment and facility which is necessary to determine the power consumption of these engine-driven components.It is recommended that the specific operating condition suggested throughout the test be carefully reviewed on the basis of actual data obtained on the specific vehicle operation and the fan.Because of the variation in size, shape, configuration, and mountings available in cooling fans, specific test devices have not been included.
Download or read book Test Method for Determining Power Consumption of Engine Cooling Fan Drive Systems written by Cooling Systems Standards Committee and published by . This book was released on 2017 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: The techniques outlined in this SAE Recommended Practice were developed as part of an overall program for determining and evaluating fuel consumption of heavy-duty trucks and buses, but it is applicable to off highway vehicles as well.It is recommended that the specific operating conditions be carefully reviewed on the basis of actual installation data. Cooling requirements are affected by all heat exchangers that are cooled by the fan drive system. These may include radiators, condensers, charge air coolers, oil coolers, and others.Because of the variation in size, shape, configuration, and mountings available in cooling fans and fan drive systems, specific test devices have not been included.Using known power/speed relationships for a given fan, this procedure can be used to calculate the fan drive system's power consumption for engine cooling systems using fixed ratio, viscous or speed modulating, and mechanical on/off fan drives including electronically activated fan drives. This power consumption may then be used in determining engine net power per SAE J1349. For fan power/speed relationships, refer to SAE J1339. This document has been revised to show an additional method for determining power consumption of engine driven fan drive systems by looking at an alternative method for measuring in vehicle fan power.
Download or read book NBS Special Publication written by and published by . This book was released on 1971 with total page 1064 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book TEST METHOD FOR MEASURING POWER CONSUMPTION OF FAN DRIVE SYSTEMS FOR TRUCKS AND BUSES written by Cooling Systems Standards Committee and published by . This book was released on 1981 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: The testing technique outlined in this SAE Recommended Practice was developed as part of an overall program for testing and evaluating fuel consumption of heavy-duty trucks and buses. The technique outlined in this recommended practice provides a general description of the type of equipment and facility which is necessary to determine the power consumption of these engine-driven components.It is recommended that the specific operating conditions suggested be carefully reviewed on the basis of actual data obtained on the specific vehicle operation.Because of the variation in size, shape, configuration, and mountings available in cooling fans and fan drive systems, specific test devices have not been included.Using known power/speed relationships for a given fan as developed by SAE J1339, Test Method for Measuring Power Consumption of Cooling Fans for Trucks and Buses, this procedure can be used to calculate the fan power requirements for truck and bus cooling systems using fixed-ratio, speed-modulating, and on-off fan drive control.
Download or read book S A E Handbook written by and published by . This book was released on 1991 with total page 1034 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book SAE Handbook written by Society of Automotive Engineers and published by . This book was released on 1984 with total page 218 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Catalog of American National Standards written by American National Standards Institute and published by . This book was released on 1995 with total page 346 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Test Method for Determining Power Consumptionof Engine Cooling Fan Drive Systems written by Cooling Systems Standards Committee and published by . This book was released on 2001 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: The technique outlined in this SAE Recommended Practice was developed as part of an overall program for determining and evaluating fuel consumption of heavy-duty trucks and buses. It is recommended that the specific operating conditions be carefully reviewed on the basis of actual installation data. Cooling requirements are affected by all heat exchangers that are cooled by the fan-drive system. These may include radiators, condensers, charge air coolers, or oil coolers. Because of the variation in size, shape, configuration, and mountings available in cooling fans and fan-drive systems, specific test devices have not been included. Using know power/speed relationships for a given fan, this procedure can be used to calculate the fan-drive system's power consumption for engine cooling systems using fixed-ratio, speed modulating, and on/off fan drives. This power consumption may then be used in determining engine net power per SAE J1349. For fan power/speed relationships, refer to SAE J1339.
Download or read book An Index of U S Voluntary Engineering Standards written by United States. National Bureau of Standards and published by . This book was released on 1971 with total page 1038 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1994 with total page 836 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Laboratory Method of Testing Fans for Aerodynamic Performance Rating written by and published by . This book was released on 2000 with total page 90 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book An Index of U S Voluntary Engineering Standards written by William J. Slattery and published by . This book was released on 1971 with total page 1016 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Monthly Catalog of United States Government Publications written by and published by . This book was released on 1971 with total page 1388 pages. Available in PDF, EPUB and Kindle. Book excerpt:
