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Old 07-15-15, 10:48 AM   #7
AC_Hacker
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Quote:
Originally Posted by stevehull View Post
I have consulted on several projects that have used closed loop pond loops for geothermal units. If I recall, all of them were HDPE plastic and about 300 feet per ton. Inexpensive to purchase, but would take a LOT of gas to fill the entire volume. I sure would use inexpensive propane to test this out, then use a higher priced gas.
I think that using HDPE for refrigeration gas would be a very, very bad idea.

I have serious doubt about the permeability of HDPE to pressurized refrigeration gases.

I'm concerned about how it would hold up to extreme temperature cycling.

And I also have concerns about how HDPE would hold up to the ravages of pressurized lubricants and refrigerants, whether hydrocarbon or proprietary global warming gases.

If this was a viable idea, it would be possible to find thousands of success stories.

Do they exist?

-AC
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