The tornado season is coming and my kids wanted to stock me up with bottled water. When I found that it costs $1.22 per gallon on average. I remembered a better way.
Dr. Robert Metcalf, emeritus professor in Microbiology at California State University at Sacramento, California has shown that if water is held at 150ºF for at least 5 minutes, water is pasteurized and waterborne pathogens will be killed. See solarcooking.wikia.com/wiki/Bob_Metcalf
LeJoy Solar Cooker
To solve the problem, I ordered a Solar Cooker from LeJoy through Amazon. It cost about $100 with free shipping.
A similar cooker is available from GoSun but it costs more.
For more detail about the LeJoy, see: amazon.com
Next, I broke into our extensive inventory and withdrew a mechanical stem thermometer, a food grade rubber stopper and 2 plastic tubes that have been machined to join two of the cooker legs together as shown below. The retail cost is $30.00
I called it the SSC Model 102 W Conversion Kit.
I assembled the kit on the cooker and it looks like this.↓
LeJoy Solar Cooker modified by the SSC 102 W Conversion Kit.
Next, I added water and tested it. On a sunny day in Minnesota, the temperature of tap water was up to 150ºF in about 20 minutes.
Now, I am ready for any disaster that interrupts our clean water supply.
Founder of Solar Solutions Central