Cob heat storage

[Raduazo]

      The best heat storage material is just plain old water.  It is cheap and
easily moved from a collection area to a storage area and it is relatively non
corrosive. you can't beat it.  The only problem is that you need more volume
and mass than with faze change materials.  The cost differential and hassle of
using phase change materials will never make up the difference.  The second
choice for heat storage is cob and the third choice is stone.  
	If  you want to do a computer search of all the latest phase change materials
try "uspto.gov" (Advanced Search Page).  That is the data base of the U.S.
Patent Office.
Ed