Electronic circuits & projects forum - Need help with electronic circuits & projects?

[fi]

Hi everyone,

Im a design student and are currently really stuck on a project that im working on.

My problem is I have a container filled with 700ml of tap water at 10 deg C i need to pass it through a heater. When it comes out of the heater it needs to be 37 deg C.

One idea I was looking at the tefal quick cup kettle inside it has a hollow element which draws water up through it and heats it up. I thorght this was a good way to do heat my water but i cant buy this element anywhere or find anything similar. Therefore i was wondering if i could build my own one using a pipe and wrapping nichrome wire around it and then running the water through it to heat it up. My problem is that I dont have much time to test and experiment and was wondering if i can work out the length of pipe i would need and the voltage and current i would need to heat the pipe so that it raises the temp of the water to 37 deg c. The water is at a flow rate of 2.6ml/s and the product must be connected to the mains.

Is this possible does anyone think it will work and if so what equations would i need to work it out? Ideally the heater section needs to be as small as possible. Any help or ideas would be greatly appreciated many thanks!!

[pebe]

You should be able to work out the power requirements from this:

It takes 1calorie to raise 1gm(mL) of water by 1deg C.
1calorie ≈ 4.2joules.
1joule = energy given by 1watt in 1sec.

[laracroft]

Hi fi,
This is Lara Croft, I read your entire post.
I am agree with pebe. You should try pebe's idea.
Have a nice day!