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Old 05-12-2021, 04:50 PM   #1 (permalink)
aerohead
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Cooling the Ferrari F12

In the July, 2016 issue of CAR and DRIVER, Tony Quiroga hot-lapped a 2016 Ferrari F12 Berlinetta to fuel exhaustion, at Buttonwillow Raceway Park, Bakersfield, California, USA, driving continuously at around 80% power ( to conserve the Michelin tires ).
In 80-minutes he drained the $113.52, 23.7-gallon ( 776.819-kWh-e ) Unleaded Premium gasoline tank, after completing 28-laps, for a total range of 89.11-miles, consuming 2.65- million Btus, @ 3.76- mpg ( 8,717.5 Wh/mile ).
3.76-mpg = 34.18% of EPA CITY mpg rating.
His maximum velocity was 130-mph. His average velocity was 67-mph.
Allowing for 35% thermal efficiency, the Ferrari produced 33,131.4-Btu ( 273.275- bhp-hour average ) useful shaft work per lap, with approximately 23,073.66- Btu lost to the exhaust, and an equal amount to the radiator per lap.
With a Tesla Model 3 'fuel tank', the Berlinetta has a total range of 8.6-miles.
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In the December, 2018 MOTOR TREND, Kim Reynolds reported that a Tesla Model 3 Performance, hot-lapped at Streets of Willow Springs ( International Raceway), Rosamond, California, USA, beat the Ford Mustang GT PP2, while returning ' an astonishing' 17 mpg-e, averaging 66.5-mph ( 36.0-mph - 114.1-mph ), 75- kWh, 2.288-gallons-e, 255,899.78-Btu, 38.898-miles range.
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Pondering the Ferrari and Tesla:
* 23.7-gallons vs 2.28817-gallons ( reformulated E10 Ethanol-equivalent)
* 776.819- kWh vs 75.0- kWh
* 2,650,513-Btu vs 255,899-Btu
* 67-mph ave. velocity vs 66.5-mph ave.
* 1,995,330 Btu/ hour vs 447,522 Btu/ hour
* 3.76-mpg vs 17.0-mpg
* 89.11-miles range vs 38.89-miles
* 8,717 Wh/mi vs 1,928 Wh/mi
* 273.2 -bhp ave. vs 145.5-bhp ave.
* BSFC 0.3993- pounds/bhp-hr vs BSFC-e 0.1649- pounds/bhp-hr
* 646,062- Btu / hour out exhaust vs NA
* 646,062- Btu / hour out radiator vs 65,628-Btu / hour
* EPA Comb. 308.1-miles vs 310-miles
* hot-lap 8.6-miles on Tesla 'tank' vs 38.898-miles
* hot-lap 17.775-gallons/ hour vs 3.912-gallons-e
* hot-lap 109.1- pounds fuel/hour vs 24- pounds 'fuel'/ hour-e
* EPA 308.1-miles vs 2,749-miles on Ferrari 'tank-e'
* 'Curb weight':
* 3,818- pounds vs 4,078- pounds @ zero-mph
* 4,078- pounds vs 4,078- pounds @ 121.5-mph
* 4,115.8- pounds vs 4,078- pounds @ 130-mph
* 4,168.4- pounds vs 4,078- pounds @ 141-mph
* 4,602.6- pounds vs NA @ 211-mph
* Michelin Pilot Super Sport K2 [ $ 1,678 (US) current replacement cost ( TIRE RACK )] vs Michelin Pilot Sport 4S (TO)
* Ferrari's road load power curve reflects a geometric, aerodynamic-downforce- dependent rolling resistance component superimposed upon the linear R-R 'curve'
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With respect to cooling systems, one would want to pay attention to the heat flux rejection requirements at the radiators between the two cars, a ratio of 9.8:1, between Ferrari and Tesla.
I used a best case, 35% thermal efficiency for the Ferrari ( US Federal Laboratories ) and a best case 85% thermal efficiency for the Tesla ( US Federal Laboratories )
I'll leave it up to the viewer to draw their own conclusions.

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Last edited by aerohead; 05-14-2021 at 01:20 PM.. Reason: add data
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