So I dove headfirst into a new project: a Steam turbine powered generator for camping that will use a small RC plane outrunner and a Pressure Cooker for steam production (and cooking!)
I think I understand the base basics of this, or am starting to. I was trying to find a way to generate electricity on a long term campout/bug-out to power a tablet that I will load with a book library and a few movies for at night, and also recharge my GPS/Radio/Headlamp. I live in Oregon...so solar may not be best option. There are ThermoElectric options...but they are low power...and come on, I want things that SPIN!
So...I found a Model Tesla Turbine that could power 3x 20w bulbs easily...and that ended the decision making process. check out this beautiful beast:
they made an updated Version. both sold out. New version will be available soon!)
So the tesla was out, and kinda heavy anyway...so I looked for more options. I found a standard blade model turbine on ebay. Its from china...So Ill probably have to upgrade the bearings, but otherwise it looks very nice and sturdy! Small, light...Should be able to easily make a few 1000 rpm from a rolling boil from a 1.5L pressure cooker (may upgrade to 2.7L)
My next decisions are Motor and power conversion.
So, I believe that I will need a relatively low KV motor to make a decent voltage. I don't know what brand/model I should be looking for and I was thinking you guys would have some suggestions.
I have been using this for some example calculations:
Max currents 15a
max voltage 22
using this motor @ 3740 (50% max) ||or|| 5000 rpm(66%):
11V ||or|| 14.7v
116.5w||or || 219.78w
I would think this would all be MORE than enough power even when I figure in I will be losing efficiency through heat and power conversion.
Please correct me if I am wrong. Help me with motor choice for longevity or better numbers and or weight.
The thing that I am really kinda lost with at this point is power conversion.
I want to be able to charge some devices. Sometimes small devices.
I know I will need to use diodes to convert and some capacitors, I believe, to level everything out(?)
Maybe for simplicty I should be looking at a brushed motor that goes direct to DC. Or maybe I should figure out how to convert this into a regular outlet and just bring the AC/DC converters that the devices use (more weight, but easy).
With all this in mind I have to also think: what if my device creates too much power: what am I going to fry/keep from frying
and how can I setup the system to use every drop of power produced (will my device's AC/DC adapters work if they are provided with less than 120V standard?? will they be damaged by low voltage?)
Maybe you guys can help me with this journey!