http://green.autoblog.com/2010/01/21/vo ... -for-heat/
Citat:
"At zero degrees Centidrade or slightly colder, you lose about 35-40 percent of the range if you use electricty [to heat the battery and or the cabin]. What we decided is we can have the opportunity to have this fuel-operated heater, which has a capacity of about six kilowatts, so that will reduce the temperature [where the range loss starts] by about 20 degrees Centigrade. Then we use the battery only for mobility. All the heat is taken from the ethanol."
35-40% är ganska mkt! Enligt
http://www.greencarcongress.com/2009/09 ... 90917.html så hr den 24 kWh batteri, det innebär att det går åt ca 9 kWh för värmen. Etanolvärmaren behöver då väl ca 2l E85 för att generera samma värme om den har 75% verkningsgrad.
Citat:
The system is a gasoline heater that was adapted to burn E85. The ethanol fuel tank is filled using the same fuel door as is used on a standard C30 to gas up and holds around 14 liters of fuel, enough to get you through about two weeks' worth of very cold weather if you keep the car plugged in whenever possible.
If the C30 makes it to the U.S. (a possibility sometime after 2013), the liquid fuel for the heater might be standard gasoline, Stegland said, since the system will be adapted market by market. As far as we know, Volvo is the only company using this method. At first glance, it seems really, really strange. On second thought, though, it kind of makes sense. The third thought? Well, that one is yours.
Vet inte Stegland att en vanlig bensinvärmare redan är flexifuel dvs funkar lika bra på E85?
Skulle nog varit snyggare med en liten etanoldriven "range-extender", ta vara på restvärmen för att värma bilensom och ladda upp batterierna.
6kW värmaren / 8kW bränsleförbrkning motsvarar kanske en 2 kW generator. Då skulle bilen kunna ha en kraftig elvärmare i första hand och i andra hand range extendern för både värme och el om inte batteriet räcker till då för kylan/streckan man ska köra.
/Aryan