FE Power Forums
FE Power Forums => Non-FE Discussion Forum => Topic started by: machoneman on November 22, 2018, 10:10:56 AM
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"Things like a 600-Watt electric water pump, whose output is—unlike a conventional pulley-driven pump—not directly tied to engine speed, but instead can vary flow based on cabin warmup and engine cooling/warming needs."
It's on the new turbo'ed I-4 Chevy (sorry!) Silverado engine. Interesting idea as we've covered here the hp loss from pumping losses by way of engine accessories. Electric power steering too?
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That's great. Now we have one more thing that runs from a data bus line. So the blend door on the heater plenum goes bad and the truck engine overheats because the cabin is too cold.
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As long as the power needed to run these electric accessories doesn't put more pull on the alternator. That would be redundant and not help at all. 600/12v=50 amps. That is still 50 amps of needed power that has to come from somewhere.
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If that 600 watts is correct that is a HUGE electric water pump. The CVR pumps I use pull about 7 amps, making them a little less than 100 watts. Keeps the engine plenty cool, too.
I wonder if they have gone to a higher voltage electrical system? There was talk in the industry a while back about moving to a 48V system. That would make a 600 watt pump a little more believable at 12.5 amps.
By the way, both watts and horsepower are measures of power, and can be compared. 1HP is the same as 750 watts. So that 600 watt pump they are talking about is equivalent to less than 1 HP. Even considering the inefficiency of the alternator, that is a big power savings compared to a mechanical water pump, which can consume well over 10 HP at high engine speeds.
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Good point Jay about power draw. That 50 amps just sounds crazy large for a pump.
If they went to 48v, would that mean 4 batteries? Or would then redesign them for more plates? I can imagine the fuss when someone would have to pay $500+ for four new batteries.
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They were talking about new battery technology, so it would have been a single, 48V battery. Probably still stupid expensive...
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Good point Jay about power draw. That 50 amps just sounds crazy large for a pump.
If they went to 48v, would that mean 4 batteries? Or would then redesign them for more plates? I can imagine the fuss when someone would have to pay $500+ for four new batteries.
500 per battery? I wish. We pay around 30k dollars per battery at work and rebuild them in house, new they've over 50k! Slightly higher voltage, but still.
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I'm just thinking four typical $120 std group 27 car batteries to get 48v. Not a specialty type battery. I've heard horror stories of the cost of the battery for like a Prius or any other electric car.