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more 24v qs

 
 
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naughtyboy
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Joined: 01 Jan 2006
Odometer: 966
Location: west yorks



PostPosted: Fri Jan 06, 2012 12:13 pm    Post subject: more 24v qs Reply with quote

finally getting rd to sorting out 24v cab heater.
ended up with a webasto airtop 2000 st in the end.

info on side says
24v/29w
warmestron max 2kw.

have found reasonably priced step up with following info
features :
Input Voltage :10-16V
Output Voltage :24V
Maximum Output Current : 12A
Output Power: 250W
Efficiency: >90%
Quiescent Current: <45mA

will that be sufficient for running unit?

cheers


Last edited by naughtyboy on Fri Jan 06, 2012 4:56 pm; edited 1 time in total
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Hooli
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Joined: 09 Jul 2004
Odometer: 2217
Location: Doncaster



PostPosted: Fri Jan 06, 2012 3:50 pm    Post subject: Reply with quote

How does a heater have an output voltage? Confused
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nivapilot
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PostPosted: Fri Jan 06, 2012 5:55 pm    Post subject: Reply with quote

Hooli wrote:
How does a heater have an output voltage? Confused


Noooooo...the step up has the output voltage.....doh!

From my understanding....power = voltage x current

therefore? current = power / voltage
current = 29 / 24
= 1.21amps

don't understand the "warmestron max 2kw"?????

if we assume that 2kw is the max current draw, then 2000 / 24 = 83 amps
so that can't be right, I think that the output heat is rated at 2kw, but the input is 29watts.

So your stepup should be plenty.
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naughtyboy
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Location: west yorks



PostPosted: Fri Jan 06, 2012 7:03 pm    Post subject: Reply with quote

cheers nivapilot.
warmestron is very roughly translated into heat output
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cynic-al
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Location: scunthorpe


1989 Suzuki SJ

PostPosted: Tue Jan 10, 2012 9:46 am    Post subject: Reply with quote

heat output will be based on the amount of fuel (diesel?) burnt not electricity used.

electricity is only used for fan / ignition / controller, it states 29w at 24v. We have to assume this includes any startup current as we don't have any more info.

P/V=I
29w / 24v = 1.21a

Well within your 12a limit.

Based on information supplied I would be happy.

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