Being all but banned from the kitchen and ceramic cook top stove, I needed another means to pasteurize cheaply. Free... That's even better!
The obvious choice, Solar.
I have built, tested, and will review the 4 different models I have worked with.(Not the type in general) I am not claiming these as my own ideas. I can say that I have researched, and will present, my own versions. Ratings will be 1-5, with 5 being best, 1 the worst. And yes, I'm saving the best for last. ;)
The basic ideas behind my builds were: Simplicity (How difficult to build), Safety, Functionality (Ease of use, Effectiveness) and Durability (how well it holds up). These are the criteria I shall rate. Each with a short comment.
A quality pair of sunglasses should always be worn while using a solar pasteurizer/cooker.
The first one I built was made from particle board. Plywood would have been a much better choice. The pics were lost when the ol' computer died. This solar wall oven designed by Barbara Kerr ( a Solar/alternative energy icon) is about as close as you can get in shape.
I could adjust the angle by flipping it on its back. Giving it 2 different angles, one for summer, one for winter. Single pane tempered glass with a blackened copper sheet as it's collector.
This design worked but was slow to heat. It wasn't adjusted to track the sun, it faced due south. The highest temp I recorded was about 175ºF.
The combination of weather, warping, and the wife's constant " Will you get that piece of crap out of my yard, your killing the grass" led to its demise. It was broken apart and will be used as kindling for heat this winter.
Simplicity: 1 Not an easy build
Safety: 3 Locking latch,tempered glass (still glass)
Functionality: 3 Slow, Rapid heat loss if opened
Durability: 2 Even painted particle board sucks. .
Overall: 2 Resisted wind, weathered badly
Edited by Foster, 02 August 2012 - 12:54 AM.