Re: Dry Ice payload testing
Dennis Klipa - N8ERF
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As a research chemist, I used dry ice a lot to cool reactions to low temperatures, -78°C.
I would suggest you set your payload in your cooler and then pour dry ice powder over it.
Dry ice comes in a block a couple inches or so thick as you know. I would use a rubber mallet/hammer to break the block into a few large chunks and put the dry ice chunks into a heavy denim bag. Gather the top of the bag and beat the dry ice chunks with the mallet. The chunks will break up into a course powder resembling sleet that you can easily pour from the bag to surround and cover your your payload giving good contact with your payload This should give you good heat transfer and a good test of your heater. I am not sure 8 lbs will be enough, depending on the size of your payload and cooler.