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themal transfer topo map of us
 
            
                
                    HeavyD                
                
                    Member Posts: 1                
            
                        
            
                    Done quite a bit of Geo-exchange heat pump systems using coil in trench method for heat transfer. Would like to know if there is a map out there of the US that shows specific thermal transfer properties of soils based on location. I know its a long shot, but rule of thumb numbers sometimes require a large margin of error on the safe side that can make these systems non-competitive on length of payback.                
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            Comments
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            Maybe
 Don't know if this site is what you are looking for but it may have some helpful info.
 http://www.geo4va.vt.edu/A1/A1.htm
 Jerry0
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