Investigations for geothermal systems
Investigations for geothermal systems
(OP)
Hi, does anybody have experience doing subsurface investigations for geothermal systems? For example, I am looking for a way to provide recommendations for soil thermal conductivity or other ground parameters that may be required to design this system. Any feedback will be appreciated.





RE: Investigations for geothermal systems
RE: Investigations for geothermal systems
We (Virginia Department of Transportation) did one energy pile installation to evaluate geothermal deicing on a bridge deck. Can't recall the data sources, etc. It's just something that's being done/studied in commercial practices.
Also, there is current research on what happens to the soil. I mean if we rely on some soil strength via standard geotechnical practices, will the changing temperature, etc. affect any of these properties? Consolidation? Strength? Etc.
I think some of this was occurring at Virginia Tech over the last few years? Can't recall.
I would google energy piles though.
f-d
ípapß gordo ainÆt no madre flaca!
RE: Investigations for geothermal systems
Heat transfer below ground for the basic rock/dirt won't change much with time. But will change a great deal week-to-week with how much water is "flowing" around the underground pipes.
RE: Investigations for geothermal systems
In typical HVAC design, the heat transfer occurs with air, which is considered an infinite, "Sink." The heat transfer does not affect the overall air temperature.
Below the ground it's different. The heat transfer makes a heated bulb, which is determined by various thermal properties. These thermal properties are influenced by all of the typical geo-variables, like soil type, soil density (void ratio), moisture content and expectations of temporal changes during the year.
I'm not a source for quantifying these variables. I just wanted to echo the thoughts about water AND all the other stuff.
I know it's frustrating that the geotechnical engineers have not really developed some generally accepted practice for geothermal studies.
f-d
ípapß gordo ainÆt no madre flaca!
RE: Investigations for geothermal systems
RE: Investigations for geothermal systems
RE: Investigations for geothermal systems
RE: Investigations for geothermal systems
f-d
ípapß gordo ainÆt no madre flaca!