Talk:Internal combustion engine cooling
In pursuit of improving that situation, I suggest first renaming the article to "Cooling internal combusion engines" because "engines" is so broad that it requires definition inside the artilce after a user has possibly picked the wrong subject. Comments please.Jobst 23:10, 12 March 2007 (UTC)
I feel there should be mention in this article of the pressurisation of automotive water cooling systems as a way of overcoming boil-up's. By increasing the pressure inside the cooling circuit the water is able to get much hotter than at normal atmospheric pressure. Of course, the description of boiling engines when vehicles are driven up mountains is part of the same discussion; as atmospheric pressure reduces water boils at a lower temperature. Neil Ives.
explanation for decline in air cooled engines
The article states that;
"Today practically no air-cooled automotive engines are built, air cooling being fraught with manufacturing expense and maintenance problems."
I feel that there needs to be a brief explanation of why this is, what are these costs? Don't worry, I'm not a VW fan boy, I'd just like to see some more information. —Preceding unsigned comment added by 188.8.131.52 (talk) 17:13, 5 July 2009 (UTC)
- Neither explanation is right, it's mostly to do with air-cooled heads having higher peak combustion temperatures and thus higher (and no longer acceptable) NOx emissions. This is why Porsche have even used water-cooled heads on the air-cooled 911 flat 6. Andy Dingley (talk) 15:37, 6 August 2009 (UTC)
Also, the explanation of water-cooling being "fixed" in the 1940s does not explain that fact (numerous first hand experience) of 1960s water cooled vehicles constantly boiling over. —Preceding unsigned comment added by 184.108.40.206 (talk) 21:20, 6 July 2010 (UTC)
150 d celsius pressure 70 lbs/inch^2 not in a car
150 d celsius pressure 70 lbs/inch^2
not in a car
Consensus before page moves?
the note on the first of the 3 ship water cooling diagrams
"A fully closed IC engine cooling system" - someone's put a 'dubious' there but in fact this system does exist and is called keel cooling.
Here are two company selling external hull-mounted heat exchangers: http://www.fernstrum.com/ http://www.waltergear.com/kc.htm but there are other ways such as welding half-pipes along the keel and hull. Here is an example of a very basic system, 2 pipes: http://www.ronlloyd.com/oddstuff/sling.jpg some designs on metal boats essentially use the entire keel and the hull as a heatsink.
It has some advantages:
- good for use in muddy/gritty water where ingesting raw water for an on-board heat exchanger could cause problems (eg dredgers)
- good for use in areas with floating seaweed or trash as there is no strainer to block
- Raw water pump is eliminated.
- Quiet since there is no continious coolant stream splashing out of the vessel
- engine coolant is kept separate to raw water
- especially effective in colder waters
it has some disadvantages:
- requires holes in the hull
- can't be used on the hard (when the boat is out of the water) - a conventional water intake can be connected to a hose.
- not very efficient if the boat is stationary or slow
- not very efficient when covered in barnicles and growth
- some designs can increase drag
- potential to be holed - can be difficult to fix in the water and contaminates the coolant
- another possible source of galvanic corrosion
I will remove the note.
--HighlyErratic 18:37, 20 September 2011 (UTC)