We are looking to build a root cellar on our farm in northern Vermont, that can serve as a cooler in the warmer months of the year. We plan on holding onto the cold of winter by freezing tanks of water inside the root cellar utilizing a closed loop system of pipes containing butane. The plan is explained in writing, pics and video in our Indiegogo campaign below
Root Cellar/Passive Cooler at Peace of Earth Farm
We are trying to raise enough funds to enable this project and be able to build and monitor this cooling system. The concept has been tested by a friend of ours in a smaller, less insulated situation. He was able to easily freeze a tank approximately 4 cubic ft and hold ice until late July/early August. We think we can hold onto ice and its cooling power longer than that in a space that will stay cool longer (a root cellar). We'll have to play around with the number of tanks needed to maintain the temperature in the space, and also how the tanks are insulated to balance holding the ice vs cooling the space. I welcome any questions you have about the project or suggestions based on similar experience.
If you think this is research that would be valuable to you or others, please consider contributing to our Indiegogo campaign and helping us spread the word!