Hot Times Ahead: The New Geothermal


Thomas Drolet Image Thomas Drolet President, Drolet and Associates Energy Services, Inc.

Energy expert Thomas Drolet updates investors on new developments in the geothermal energy field.

We're at The World MoneyShow in Chicago and I'm with Tom Drolet and we're going to talk about new geothermal.

Yes, Greg, new geothermal. Let's get out of the way the household or the residential geothermal, which is many houses.

The quaint Geothermal?

Well, quaint...but it's good, useful energy. What you're doing is taking the temperature difference between the surface and say 100 feet under your house and using that temperature difference to drive a heat pump and lessen your electricity bill. A lot of places are using that. It's more effective in the south than it is in the north, but it's there.

What I'd like to get into, though, is conventional big geothermal. Now let's take the example of the west, north of San Francisco, there's the large geyser field that's got 1,000 megawatts of geothermal energy. What they've done is they've drilled two miles down into the rock and then that fracture zone that's down there at two miles, the interstitial water that's already in the rock; hot rock.

Why is it hot? Because the magma close to where those tectonic plates come together, the San Andreas Fault, that hot water turns to steam as it comes up the wellbore into a turbine generator that makes electricity. There are 22 plants up in the geyser field operating today.

There are literally hot spots around the world, not just on the west cost of the US.