The process developed to quantify the fuel savings potential of a variable speed fan drive has produced a simple tool to predict the fuel savings of a variable speed drive, and has sparked significant interest in the use of variable speed fan drive for Tier 3 emissions compliant machines. The goal for this task was to provide a continuously variable speed fan drive with an efficiency of 95%+ at max speed, and losses no greater than at max speed as the fan speed would vary throughout its entire speed range. Develop a high efficiency variable speed fan drive to replace existing slipping clutch style fan drives. ![]() This sensitivity to downstream blockage affects flow, efficiency, and noise all negatively, and further development was terminated. The result was a significant loss in flow with the prototype due to its sensitivity to downstream blockage. The goal was to provide equal airflow at constant fan speed, with 75% of the input power and 5 dB quieter than the conventional fan. The fan was mounted directly in place of the conventional fan (relatively close to the engine). A 'swept blade mixed flow' fan was rapid prototyped from cast aluminum for a performance demonstration on a small construction machine. Demonstrate the performance and design versatility of a high performance fan. The techniques in the modeling guide reduced variability to the goal of + 5% for the case under study. Current, uncontrolled modeling practices produce flow estimates in some cases within 5% of measured values, and in some cases within 25% of measured values. A CFD fan system modeling guide has been completed and transferred to design engineers. Improved axial fan system modeling is needed to accommodate the numbers of cooling systems to be redesigned to meet lower emissions requirements. The narrow range of fan operating conditions affected by the aeroshroud makes this concept unattractive for further development at this time 3. Fan noise was reduced from 0 to 2dB, more ยป vs. The goal of 10% increase in fan efficiency was not met. Performance testing at Michigan State University showed the design is capable of meeting the goal of a 10% increase in flow, but over a very narrow operating range of fan performance. Fan shroud developments, using an 'aeroshroud' concept developed at Michigan State University. An experienced turbomachinery designer, using a specialized CFD analysis program has taken over the design and has been able to demonstrate a 5% flow improvement (vs 10% goal) and 10% efficiency improvement (vs 10% goal) using blade twist only. ![]() First and second generation concepts could not meet either performance or sound goals. ![]() ![]() The initial plan was to use Genetic Algorithms to do an automated fan design, incorporating forward sweep for low noise. Develop an axial fan that will provide more airflow, with less input power and less noise. This work was a suite of tasks aimed at reducing the parasitic losses of the cooling system, or improving the design process through six distinct tasks: 1. Partner your Fenix Performance Fan Shroud Kit with a Fenix Performance Alloy Radiator for the ultimate cooling combo.Upcoming emissions regulations (Tiers 3, 4a and 4b) are imposing significantly higher heat loads on the cooling system than lesser regulated machines. Designed with performance and reliability in mind, our alloy fan shroud kits significantly increase the cooling ability on the track or street while offering a factory fit to your oem or Fenix Performance Alloy Radiator. Upgrade your old, stock fan shroud with a Fenix Performance Toyota Fan Shroud Kit. Contact us prior to purchasing If your order is urgent. Special Order options are made to order and can take up to 2 weeks to produce.
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