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Originally Posted by H/V Vega  Thanks Minggat that seems a good tip. I have sent him an email in hopes he will answer. Checked the site you mentioned but those are portable units and ours are fixed ( very much so). Then again every bit of information is always useful so thanks again.
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You really need to get in touch with mr edwards at Global Cooling.. I have talked to him in the past, and your application is EXACTLY the application that they developed the Stirling cooler for.
If you have looked at their website (global cooling) you can see that there are products designed for just what you are doing.
I will say that the stirling cooler is THE MOST EFFICIENT way of cooling that is currently available hands down.
On here we only talk about the portable coolers that TwinBird had made (specifically the one marketed by Coleman here in the U.S.) but from what I know about the portable cooler, they could absolutely work for your application... One thought is to use the portable cooler to freeze water or cold packs, then use those to keep your medical supplies cool.
When I talked to Mr. Edwards, we discussed the possibility of running the stirling cooler on solar panels only in the day.. running them with as much output as they could make while the sun shines, then using frozen water or cold packs to carry thru the night.
The small cooling unit only draws about 40 watts of power when it is running at its maximum output, so a reasonably sized solar array could run it easily. If you wanted to have it operate at lower power 24hrs a day you would need a much larger solar array and a storage battery.
Again,, the people over at global cooling would be able to help you. Like I said.. the application that you describe is the reason they developed the stirling in the first place.
Louis