Subject: Re: Help creating a heating element from resistor.
Date: Sun, 08 Dec 2002 14:05:03 -0800
User-Agent: MT-NewsWatcher/3.2 (PPC Mac OS X)
In article ,
"George R. Gonzalez" wrote:
> "Sam" wrote in message
> > Hello,
> > I'd like to create a small heating element running on as low a
> > voltage/current as possible and heats up to about 250 deg C. I'd like
> > to pump a fluid over it and have that fluid vaporize.
> We need a bit more info. How much fluid do you want to vaporize
> per unit time? What's the heat capacity of the fluid? What is its
> boiling point temperature? What is its heat of vaporization?
> Witht hat info we can calculate how many watts is required.
I'm not quite sure what the flow rate will be yet, pretty low, I'll be
using as small a pump as possible. Everything togeather should weigh
3oz or less and another 2oz of liquid, the 3oz includes a battery to run
this on. The fluid is oil, don't konw what the heat capacity is, flash
point is 240 deg F, API gravity is 38.3. I was looking at a site that
carries Nichrome wire and they had some tables to help figure out what
you need (http://www.wiretron.com/nicrdat.html). It looks like if I
used AWG 40 wire I could get by with only needing to generate about 8
watts which I could get from 2 1.2V batteries at 3 amps. Is Nichrome
more efficient at generating heat from electricity then a resistor?