Quote:
Originally Posted by gpsman1
In the future could you label things by color in the graph?
I think I get it, but It took a while to figure out.
Green = "P"+preheat (best rjw)
Red = "D" w/o preheat (worst rjw)
Blue = "N" w/o preheat (close to "D" and no autoshut rjw)
and so on.
So are you saying you went to EV mode in about 86 seconds when using the block heater?
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Exactly versus more than 5 minutes in "D" and never stopping in "N". Preheating in "P" makes a significant improvement.
Quote:
Originally Posted by gpsman1
I'm really curious what this would be like on a 0 degree night.
You could get similar results, but will probably have to pay for more energy to run the block heater for more hours in winter. Don't you think?
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If that is 0C, I might have some data in about six months. But if that is 0F, I live in North Alabama.
As for cost, my Prius block heater is about 400W. Ken@Japan reports the electrical cost is half of the gas savings. That pretty well agrees with our rates in N. Alabama too. However, this is only the warm-up idle savings. The big bucks comes from entering hybrid mode so much sooner on the road.
Quote:
Originally Posted by gpsman1
So I can imagine the gas savings.
What about the cost savings?
CO2 savings if you consider the power plant?
Thanks for doing an experiment I've always wanted to do.
( But I still don't have a block heater, but think I can get one for about $120. ) OTOH, how much gas would I need to save to get my $120 bucks back! Catch-22 as they say. ( I know they say that, but I don't even know what catch-22 comes from! )
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JC Whitney has an oil pan heater, 125W, that you apply to bottom of the pan. I've got one on my transaxle oil pan and it seems to be fairly effective in warming up that block of oil and metal. I remember the JC Whitney part is relatively affordable and I thought it came in two sizes.
Bob Wilson