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Electric Cooling Fan with High Ram Airflow - A Fuel Economy Improvement - (Part One - The Vehicle) (Part Two - The Fan) (Part Three - The Electric Fan Cooling Package Assembly)
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English
Abstract
The 1980 X-Car engine cooling system is designed to aid in maximizing fuel economy. An electrically driven fan was selected to provide airflow to meet the above objective. Several other design objectives such as light weight and low noise level are also very well satisfied by the electric fan. This paper describes the strategy and techniques used to meet the fuel economy improvement goal while still providing acceptable engine cooling and the airflow required for adequate air conditioning condensing. This strategy consisted of maximizing ram airflow via methods of wind tunnel, flowmeter and on road development. The heat exchangers were then sized to perform adequately with only ram airflow in a road load condition. Finally the additional airflow required at idle and at high heat rejection points was determined. A high peak efficiency fan was selected to provide the airflow needed when operating near its maximum efficiency.
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Authors
Citation
Laise, T., Mellin, R., Longhouse, R., and Pryjmak, B., "Electric Cooling Fan with High Ram Airflow - A Fuel Economy Improvement - (Part One - The Vehicle) (Part Two - The Fan) (Part Three - The Electric Fan Cooling Package Assembly)," SAE Technical Paper 790722, 1979, https://doi.org/10.4271/790722.Also In
References
- Porter F. C. “Design for Improved Fuel Economy - The New GM Front Drive Car” SAE Automotive Congress Detroit June 1979
- Kreith F. “Principles of Heat Transfer” Scranton, Pa. International Textbook Co. 1958
- Hawes S.P. “Improved Passenger Car Cooling Systems” Paper 760112 SAE Automotive Congress Detroit February 1976
- Mellin R. C. “Noise and Performance of Automotive Cooling Fans,” General Motors Research Laboratories Research Publication, GMR-2821 September 1978
- Mellin R. C. Sovran G. “Controlling the Tonal Characteristics of the Aerodynamic Noise Generated by Fan Rotors,” ASME paper No. 68-WA/FE-23 November 16 1969
- Longhouse R. E. “Noise Mechanisms in Automotive Cooling Fans,” General Motors Research Laboratories Research Publication, GMR-2450 November 30 1977
- Longhouse R. E. “Control of Tip-Vortex Noise of Axial Flow Fans by Rotating Shrouds,” Journal of Sound and Vibration 1978 58 2 201 214