ࡱ> /.(  P <(Russ@FarTooMuch.Infof/ 0DTimes New Roman|0Wo 0|DComic Sans MSn|0Wo 0|Bd< .  @n?" dd@  @@`` <     c $@ <3@7lEL ʚ;n{7ʚ;g4dddd0Fppp@ <4!d!d 0Lh<4dddd 0Lh ^Energy in Gasoline0<Energy in Gasoline G$3The Department of Energy [DOE] web page says that there are 124262 BTU or 36.4 kWh of energy in a gallon of gasoline. They also say that 1 gallon of diesel has 138691 BTU or 40.6 kWh of energy. I met a petroleum engineer and asked him how much energy was in a gallon of California gasoline and he said about 107000 BTU depending on the time of year. California gasoline is 10% ethanol which has much less BTU/gallon then gasoline. 107000 BTU would be about 31.4 kWh. G<Motor Efficiency G$3A long time ago I was told that a gasoline engine was about 20% efficient in city driving. I was told that a diesel engine was about 30% efficient and that a turbo-diesel could approach 40% efficiency. A DC motor and controller in an electric car is about 85% efficient. An AC motor and controller can approach 95% efficiency. In addition, the voltage needed to charge a batter is higher then what the battery provides. The battery charge/discharge cycle is about 80% efficient. G<Energy Comparison G$3It takes almost 20 kW from the battery to keep a small electric vehicle going at 60 mph on a level road. That would be 20 kWh for 60 miles or 3 miles per kWh. That would be 25 kWh from the wall to deliver 17 kWh to the wheels To go 60 miles in an hour would require: (17/31.4)/20% = 2.71 gal CA gasoline (17/36.4)/20% = 2.34 gal AZ gasoline (17/40.6)/30% = 1.40 gal Diesel (17/40.6)/40% = 1.05 gal Diesel - Turbo G< Energy Comparison G$3 In other words: 60/20 = 3 miles / kWh EV 60/2.71 = 22.1 mpg CA gasoline 60/2.34 = 25.6 mpg AZ gasoline 60/1.40 = 42.8 mpg diesel 60/1.05 = 57.1 mpg turbo diesel At a steady 60 mph on level road in a typical small car that can hold 4 passengers and luggage. G< Energy Consumption G$3 Note that the calculations are a rough  back of envelope or  ball park since the power an actual vehicle requires depends on weight, aerodynamics, tire rolling resistance, driver ability, etc. If the mpg of a vehicle is known, this data can be used to estimate the kWh needed in a gasoline to electric conversion.BBG<{ EnergyG$3( Russ Lemon Russ@FarTooMuch.Info @)G< G0<G<4  0$   ` ` ̙33` 333MMM` ff3333f` f` f` 3>?" dd@,|?" dd@   " @ ` n?" dd@   @@``PR    @ ` ` p>> f(    6 P  T Click to edit Master title style! !  0   RClick to edit Master text styles Second level Third level Fourth level Fifth level!     S  0 ``  >*  0 `   @*  0 `   @*B  s *޽h ? Z3f̙ Default Designp   0(  x  c $M0Pp    H  0޽h ? ̙33 @$(  r  S   r  S    H  0޽h ? ̙33 P0(  x  c $  x  c $   H  0޽h ? ̙33 `0(  x  c $\  x  c $d   H  0޽h ? ̙33 ,0(  ,x , c $   x , c $   H , 0޽h ? ̙33 <0(  <x < c $5`  x < c $a  H < 0޽h ? ̙33 00(  0x 0 c $W`  x 0 c $4   H 0 0޽h ? ̙33X  4(  4r 4 S xP    4 s *_  t  G<,H 4 0޽h ? ̙33r0`i @"&$(+ Oh+'0 `h  Energy in GasolineRussy iRussy i11sMicrosoft PowerPointP@@ե-@^@d_Gg  "& &&#TNPP2OMi & TNPP &&TNPP    --- !---&G&w@ Xwaw @w_f- &Gy& --i8-- @BComic Sans MSXwaw @w_f- <."2 ZEnergy in Gasoline("#"!",!!"#.--"System_f !-&TNPP &՜.+,D՜.+,P    On-screen ShowFamilyea+0  Times New RomanComic Sans MSDefault DesignEnergy in GasolineEnergy in Gasoline Motor Efficiency Energy Comparison Energy Comparison Energy Consumption Energy  Fonts UsedDesign Template Slide Titles 8@ _PID_HLINKSApmailto:Russ@FarTooMuch.Info_=+RussRuss  !"#$%'()*+,-0Root EntrydO)Current User&SummaryInformation(PowerPoint Document(a+DocumentSummaryInformation8