On 19.01.13 23:22, Viesturs Lācis wrote: ... > I do not think that it is possible in car, so the question is: > Can anyone suggest a small pump, powered by AC electricity and, what > is most important, that will work in -20C, -30C temperature? I was > thinking about all these aquarium pumps - size is great, flow rate > also good, but I am reserved about them working below 0C.
Question: Does the pump need to work so far below 0°C if it is placed near the cheap heater you're fitting? If the pump is within a modestly insulated enclosure, adjacent to the heater (possibly padded a bit so it doesn't get too hot), then it should be warm enough to function by the time the engine coolant is warm enough to be pumped. So long as its bearing lubricant is not frozen, the motor should be fine. The shaft seal on a centrifugal pump would be the main concern? I'm having trouble relating to those unimaginably low temperatures. It was over 46°C in Penrith (45.8°C in Sydney) yesterday. Here in Victoria it's much cooler today, but it snows leaves every time the wind blows on the arid hotter days (40+°C), and the Manna Gums shed all their outer bark when it gets hot, so the 45 x 240L wheelie-bins of leaves (plus 6 cu. m of sticks) cleaned up on my 3/4 acre outer-suburban block before Christmas is as good as cancelled by all the crap which has fallen since. Adequate insurance, evac kit packed, and regular monitoring of the radio and the fire authority website are all you can do, with the house surrounded by eucalypt forest. (Oh, and leave early - the roads in our hills cannot cope with a mass evacuation.) Erik -- The Kyoto Protocol, drafted in 1997, aimed to reduce the world's greenhouse gas emissions by around five per cent from 1990 levels by the end of 2012. Instead, global greenhouse gases have risen around 58 per cent in that time. - http://www.abc.net.au/news/2012-12-08/troubled-un-climate-talks-spill-over/4416696 ------------------------------------------------------------------------------ Master Visual Studio, SharePoint, SQL, ASP.NET, C# 2012, HTML5, CSS, MVC, Windows 8 Apps, JavaScript and much more. Keep your skills current with LearnDevNow - 3,200 step-by-step video tutorials by Microsoft MVPs and experts. ON SALE this month only -- learn more at: http://p.sf.net/sfu/learnmore_123012 _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
