5 ms·
Ice water, or something even colder. Water itself isn't what puts out a Li-ion fire, it's ending thermal runaway. The people will pay for it because it's neces
by doggodaddo78 6y ago
Ice water, or something even colder. Water itself isn't what puts out a Li-ion fire, it's ending thermal runaway.
The people will pay for it because it's necessary and times have changed.
- bdcravens 6y agoOr they will attempt to pass on the cost to EV manufacturers and/or owners.
- ericmay 6y agoHow novel. I wonder when they’ll pass on the cost of smog, climate change, emissions, etc to ICE owners ;)
- sofixa 6y agoThey really should
- bdcravens 6y agoThey do, in the form of taxes on gasoline. (Whether the government uses that tax revenue to address those issues is another question)
- ericmay 6y agoAt least at the federal level the gas taxes haven't risen in about 25 years... [1] [1]https://www.npr.org/2018/10/05/654670146/its-been-25-years-since-the-federal-gas-tax-went-up https://www.npr.org/2018/10/05/654670146/its-been-25-years-s... I understand why they're not raising it, though.
- doggodaddo78 6y agoVehicle registration fees for NMC EVs.
- rightbyte 6y agoWhy would 0c water be better in a meaningful way compared to 25c? Most cooling is from the steam phase change, right?
- rad_gruchalski 6y agoMaybe because it's 25C cooler than 25C water. Takes more energy to convert to steam. I guess.
- rightbyte 6y agoMy point is: Water 1c change is 4184 J/kg (1 kcal) Water to steam 2260 kJ/kg. So 25c cooler is 25 * 4.184 kJ extra, which is: 25 * 4184 / (2260k + 75 * 4184) = 104600 / 2573800 => 4% more energy than 25c to steam. And then you need a refrigerator to cool tons of water, instead of just carrying more water.
- mrep 6y agoNo wonder my steam shower is the most power hungry appliance in my place at 10 KW.
- rad_gruchalski 6y agoHah, hacker news...
- doggodaddo78 6y agoIce, dry ice, liquid nitrogen would be even better. It's not about water putting out the fire directly, it's getting the Li-ion battery below thermal runaway to stop the self-immolation.