Green Building Law Update : Green Building & Construction LEED AP, Lawyer & Attorney Chris Cheatham : Washington DC, Virginia, New York City

When you think of green energy projects, what sort of results do you anticipate?  New energy sources?  Reduced energy costs?  Green jobs? 

What about earthquakes?

Geothermal energy, a widely-touted green energy source, involves drilling miles-deep wells into underground reservoirs in order to tap steam and hot water that can be used for energy applications.  I have previously referenced a geothermal energy project that was shut down by the Swiss government for allegedly causing earthquakes in 2006 and 2007. 

Apparently, the potential for earthquakes triggered by geothermal energy projects is also a concern for the U.S. Department of Energy, as detailed in a December 30 DOE letter: 

"The United States Energy Department, concerned about earthquake risk, will impose new safeguards on geothermal energy projects that drill deep into the Earth’s crust.  The new policy is being instituted after a project in California that used the new technology was shut down by technical problems and encountered community opposition, federal documents indicate.

The project, by Seattle-based AltaRock Energy, would have fractured bedrock and extracted heat by digging more than two miles beneath the surface at a spot called the Geysers, about 100 miles north of San Francisco. The company ran into serious problems with its drilling and faced accusations from scientists and local residents that it had not been forthcoming enough about the earthquake risk. AltaRock denied those accusations."

"In a second document dated Sept. 11, 2009, but not previously disclosed, the department concluded that earthquakes that would have been set off by the AltaRock project would 'not have a significant impact on the human environment.'”

Just another example of how new, green technologies will result in unintended consequences.  How can you extrapolate this example to the green building industry?

Photo Credit:  peripathetic

Related Links:

Green Energy Project Causes Earthquakes? (GBLU)

Geothermal Basics (DOE)

Geothermal Drilling Safeguards Imposed (NYT)

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Geothermal heat pumps continue to gain popularity as an alternative energy source.  This energy technology doesn't come without uncertainties though.  In fact, as ENR recently described it, there are significant problems with the geothermal industry:  "[M]any of these systems are not performing as touted, especially cleverly hyped geothermal heating systems that are plagued with inflated savings claims and deficient designs."

The article goes on to describe three primary problems with the geothermal industry:

• "Their performance often is only superficially studied by equipment insiders whose main interest is selling more systems. As a result, the construction industry lacks a trusted set of independently audited best practices for design, installation and maintenance. This issue is becoming increasingly important as engineers scale up geothermal systems for larger buildings."

• "In particular, the coefficient of performance (COP) rating for a heat pump usually does not take into account the efficiency of the entire system. During design and installation, many variables can creep into that equation, such as the amount of electricity needed to pump water through piping loops, heat escaped through poorly built ductwork and seasonal imbalances in how much heat is dumped or pumped out of the ground. These all can compromise the COP and extend the payback time for systems."
   
• "Industry promoters working for owners, architects, engineers and contractors have done a poor job of educating consumers on the benefits and drawbacks of geothermal HVAC. There are large variations in average ground temperatures by region, but geothermal advocates would have potential customers believe ground temperature is a constant 55°F."

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It's always amazing to me the unexpected consequences that result from apparently benign activities.  As new green building and energy innovations and materials are incorporated into projects, there is always the possibility of an unexpected consequence.  

Take for instance a geothermal energy project in California.  

Geothermal projects involve mile-or-more-deep wells drilled into underground reservoirs to tap steam and very hot water that can be brought to the surface for use in a variety of applications.  The Department of Energy is investing millions in geothermal projects.  But one of the DOE projects was recently halted:  

The project by the company, AltaRock Energy, was the Obama administration’s first major test of geothermal energy as a significant alternative to fossil fuels and the project was being financed with federal Department of Energy money at a site about 100 miles north of San Francisco called the Geysers.

But on Friday, the Energy Department said that AltaRock had given notice this week that “it will not be continuing work at the Geysers” as part of the agency’s geothermal development program.

The timing of the announcement coincides with another project recently shutdown due to earthquake concerns:  

"The project’s apparent collapse comes a day after Swiss government officials permanently shut down a similar project in Basel, because of the damaging earthquakes it produced in 2006 and 2007. . . .  [T]he type of geothermal energy explored in Basel and at the Geysers requires fracturing the bedrock then circulating water through the cracks to produce steam. By its nature, fracturing creates earthquakes, though most of them are small."

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