I remember last winter battery-powered buses in Sofia had the heating turned off to save on power.
The battery lifetime issue -- thanks for bringing it up. That's another big problem for me, but for people who don't drive their cars for more than 5 year it won't matter. Disposal problem aside.
I remember last winter battery-powered buses in Sofia had the heating turned off to save on power.
The battery lifetime issue -- thanks for bringing it up. That's another big problem for me, but for people who don't drive their cars for more than 5 year it won't matter. Disposal problem aside.
Right. Let the second owner deal with all the battery problems. IтАЩm sure that will hurt the resale value of EVs when more and more people run into these problems.
Tesla uses a heat pump for heat/cooling. Very efficient. The lack of waste heat in an EV is a plus not a minus. Waste heat is wasted energy and ICE vehicles waste about 85% of the gasoline energy content.
Cool. I understand that there is a lot of energy losses at each step of the electricity generation process. Efficiency losses at the point where fuel is burned to turn the turbines, then each time it goes through a transformer, then through transmission lines, then back through transformers to get back to 220v or whatever your Tesla charger is, then efficiency losses when charging your battery then again when discharging your battery. I have always wondered what percentage all these losses add up to. Is there a way to figure this out? For example is it more efficient to burn gas to cook my bacon on a gas stove or to burn gas at the power plant and go through all the transmission losses noted above?
That's true but you can run on natural gas @ 10X lower cost per unit energy than gasoline or diesel right now. Burning at 60% efficiency in a CCGT which is 4X more efficient than the average ICE vehicle efficiency. So 60% eff X 90% transmission eff x 90% charging eff x 90% BEV efficiency = 44% efficient vs 15% for the ICE vehicle. 3X more efficient and 10X lower fuel energy cost. Not hard to figure out why people want BEVs. Just wait until they are readily available in heavy Trucks.
Burn natural gas @10x lower cost per unit energy than gasoline or diesel?? Maybe years ago. Either my back of the envelope math is out the window or I didnтАЩt understand correctly. Help me here. You will need to burn 126.67 cubic feet of natural gas to produce the same energy as one gallon of gasoline. https://techiescientist.com/natural-gas-vs-gasoline/
In Texas @ $25 per 1000cuft equates to $3.15 a gallon gas. $0.025 X 126 = $3.15
I'm getting $2/liter for heating oil/diesel vs Natural Gas @ $5/GJ. Diesel @ 38MJ/liter is $2/0.038MJ= $53/GJ or 10X more than natural gas.
Power plants in the US last year were paying avg ~$4/GJ for natural gas with gasoline 29.2L per GJ is equivalent to paying $4/29.2 = 13.7 cents/liter for gasoline or 51 cents/USgal which is ~10x lower than gasoline prices now.
I am not an EV fan. A hybrid would work for me with my solar for our 10 to 20 km trips. Except for November through February. Economically makes NO sense. I have my Fiat 500X Diesel. For homeowners with solar and small trips it can make sense except for the economics of initial purchase and electrifying the house. Forget apartment dwellers. Here in Germany you CANNOT find an electrician anymore for installation.
As far as battery recycling there is better news out now for secondary use as storage and much longer life albeit with reduced capacity. In other words the batteries can continue to be used for years in stationary operation where weight is not a factor.
Range anxiety and always hoping you find a charging station AND then having to wait makes current EVs useless for medium to long range travel.
I remember last winter battery-powered buses in Sofia had the heating turned off to save on power.
The battery lifetime issue -- thanks for bringing it up. That's another big problem for me, but for people who don't drive their cars for more than 5 year it won't matter. Disposal problem aside.
Right. Let the second owner deal with all the battery problems. IтАЩm sure that will hurt the resale value of EVs when more and more people run into these problems.
The good thing about inefficient ICEs is that there is plenty of waste heat to keep the bus warm
The waste heat from EVs is at the electric motors that drive the wheels. No way to get that heat into the passenger compartment. Good try.
Tesla uses a heat pump for heat/cooling. Very efficient. The lack of waste heat in an EV is a plus not a minus. Waste heat is wasted energy and ICE vehicles waste about 85% of the gasoline energy content.
Cool. I understand that there is a lot of energy losses at each step of the electricity generation process. Efficiency losses at the point where fuel is burned to turn the turbines, then each time it goes through a transformer, then through transmission lines, then back through transformers to get back to 220v or whatever your Tesla charger is, then efficiency losses when charging your battery then again when discharging your battery. I have always wondered what percentage all these losses add up to. Is there a way to figure this out? For example is it more efficient to burn gas to cook my bacon on a gas stove or to burn gas at the power plant and go through all the transmission losses noted above?
That's true but you can run on natural gas @ 10X lower cost per unit energy than gasoline or diesel right now. Burning at 60% efficiency in a CCGT which is 4X more efficient than the average ICE vehicle efficiency. So 60% eff X 90% transmission eff x 90% charging eff x 90% BEV efficiency = 44% efficient vs 15% for the ICE vehicle. 3X more efficient and 10X lower fuel energy cost. Not hard to figure out why people want BEVs. Just wait until they are readily available in heavy Trucks.
Burn natural gas @10x lower cost per unit energy than gasoline or diesel?? Maybe years ago. Either my back of the envelope math is out the window or I didnтАЩt understand correctly. Help me here. You will need to burn 126.67 cubic feet of natural gas to produce the same energy as one gallon of gasoline. https://techiescientist.com/natural-gas-vs-gasoline/
In Texas @ $25 per 1000cuft equates to $3.15 a gallon gas. $0.025 X 126 = $3.15
In NJ about $1.60. https://www.chooseenergy.com/data-center/natural-gas-rates-by-state/
In Germany @$675 equates to $85 a gallon gas.
I'm getting $2/liter for heating oil/diesel vs Natural Gas @ $5/GJ. Diesel @ 38MJ/liter is $2/0.038MJ= $53/GJ or 10X more than natural gas.
Power plants in the US last year were paying avg ~$4/GJ for natural gas with gasoline 29.2L per GJ is equivalent to paying $4/29.2 = 13.7 cents/liter for gasoline or 51 cents/USgal which is ~10x lower than gasoline prices now.
Be thankful you donтАЩt need to buy NG in Germany. Where are you based?
I am not an EV fan. A hybrid would work for me with my solar for our 10 to 20 km trips. Except for November through February. Economically makes NO sense. I have my Fiat 500X Diesel. For homeowners with solar and small trips it can make sense except for the economics of initial purchase and electrifying the house. Forget apartment dwellers. Here in Germany you CANNOT find an electrician anymore for installation.
As far as battery recycling there is better news out now for secondary use as storage and much longer life albeit with reduced capacity. In other words the batteries can continue to be used for years in stationary operation where weight is not a factor.
Range anxiety and always hoping you find a charging station AND then having to wait makes current EVs useless for medium to long range travel.