Archive for the ‘Geothermal’ Category

Renewable Electricity Dominates California Utility Plans

Monday, October 20th, 2008

On Thursday 10-16-08 I attended the User Group meeting of Plexos Solutions LLC, a boutique firm providing software and consulting to the rapidly changing California electric market. One of the presentations covered issues surrounding integration of renewable energy resources into the California Independent System Operator (CAISO). This is important to sustainable energy investors because virtually all the growth in generating capacity is forecast to come from renewable resources. While the fundamentals of this market have been overwhelmed by broader market conditions this last month, over time the fundamentals provide the tailwind that will lift stocks. And the growth expectations for renewables are very high in the California market.

Over the period 2007 - 2012 the CAISO is planning for increases over existing capacity of:

5,053 MW of wind, a 187% increase,
1,064 MW of geothermal, a 68% increase,
946 MW of concentrating solar, a 203% increase,
508 MW of utility scale PV solar, a 2,032% increase, and
221 MW of biomass, a 28% increase
These are huge numbers representing billions of dollars of projects and electric revenues. Striking are the growth expectations for the two main solar approaches.

The ISO Control Room in Folsom directs the flow
of electricity and ensures access to 25,000 circuit
miles of high-voltage, long distance power lines.
(Photo: California ISO)

In the concentrating solar sector, the state currently has 354 MW of large projects operating with the last one completed in 1990, 18 years ago.

Most of this capacity is owned by FPL Energy, part of a large regulated utility. So the new capacity has to come from a sector that hasn’t, in California at least, been able to construct a project for many years. Equally noticeable it the paucity of publicly traded companies in the concentrating solar sector. Solar Millennium (S2M.DE) is one the few with significant concentrating solar activity.

The state currently has 8 projects with 3,689 MW of large concentrating solar projects in the permitting pipeline. But these numbers are deceptive. Of the 8, two projects are actually “solar/thermal” hybrids like the existing operating projects. These two projects represent 1,180 MW of capacity with 112 MW attributable to solar. The remaining 6 projects are a gamut of technologies ranging from troughs, reflectors, towers, and Sterling engines. These projects are all owned by private companies or municipal utilities and currently don’t present an opportunity for public market investors.

The PV solar sector provides more avenues for public investors to participate via investment in the PV supply chain. If the numbers work out the utility market represents a multi-year, very large opportunity. Let’s take a look.

As of the end of 2007 California had an estimated 279 MW of installed PV in homes and businesses and 25 MW of utility scale projects. This makes sense since the home and business markets are net metering against retail rates whereas utility scale projects have to compete against wholesale markets. So the premise is that PV solar is now becoming sufficiently competitive at the wholesale level to install over 500 MW in the next 5 years.

One of the first test cases was recently announced. On July 10, 2008 the California Public Utilities Commission approved a 7.5 MW contract between First Solar’s (FSLR) FSE Blythe project and Southern California Edison. Unfortunately much of the economic information was not disclosed but some key data can be gleaned from the record. First, the company is projecting an excellent 27% capacity factor for the project, significantly higher than typical estimates for PV projects. But equally important is the company is pursing the development receiving a price at or below the “market reference price” which is based on a highly efficient modern thermal plant. After accounting for some messy seasonal and time-of-use factors I calculate the project will receive approximately USD 0.14/kWh on average plus a 30% tax credit now that the Emergency Economic Stabilization Act of 2008 passed. If First Solar can make money at this project then they are very near the holy grail of grid parity (at least until the credit expires December 31, 2016). And the utility systems can, according to the CAISO, absorb large amounts of solar power for years to come. Game on.

Mark Henwood is the founder of Camino Energy, an information provider specializing in globally traded sustainable energy stocks.

Geothermal in Hawaii

Saturday, July 12th, 2008

It Isn’t Oil!

Geothermal energy: Clean, stable, always available

In 1881, King David Kalakaua had the bright idea of using Hawaii’s fiery volcanoes to produce electricity and light the streets. It took technology the next century to catch up with the visionary king.

On the Big Island of Hawaii, nearly 20 percent of the electricity we consume is produced naturally by tapping the Earth’s heat. It is firm, strong power that the island truly depends upon, enough to continually power 20,000 residences.

When the wind doesn’t blow and the sun doesn’t shine, heat from the Earth’s interior is always available.

Puna’s geothermal power station
delivers 30 megawatts of power,
with potential to deliver much more.
(Photo: Puna Geothermal Venture)

Puna Geothermal Venture, the only commercial geothermal facility in the state, has been generating sustainable electricity for the Big Island for 15 years.

Under a Power Purchase Agreement with Hawaii Electric Light Company, PGV sends all the electricity it produces—30 megawatts—to the utility. It could provide much more.

The slopes of Kilauea Volcano are the state’s best resource.  The only other island with significant geothermal resources is Maui, but its potential is considerably less.

Geothermal electricity:

  • Accounts for 30 percent of the state’s renewable energy—more than wind and solar combined
  • Saves 144,000 barrels of oil a year—more than 1.8 million barrels since 1993
  • Diversifies Hawai‘i’s energy sources
  • Means a much cleaner environment
  • Creates jobs and other economic benefit
  • Is a clean, stable, renewable source of power
  • And . . .  it’s local!
  • Puna Geothermal Venture invested heavily in new equipment and technologies to get where it is today. State-of-the-art equipment is used to drill wells deep into volcanic reservoirs—a mile or more—and bring up hot fluid and steam. The steam drives turbines that generate electricity.

    Geothermal is also ‘green’: No oil or other fossil fuel is used in the operation.

    The plant has near “zero” emissions because the brine and gases that are left over are injected back into the Earth, well below the water table, through another set of wells called re-injection wells.

    This is called a binary or closed-loop circulation system, meaning that no excess gases or fluids reach the open air. It is one of the most advanced methods for producing geothermal energy. All PGV wells are this type.

    Other uses are possible besides generating electricity. Geothermal could contribute to the manufacture of other technologies, such as hydrogen fuel cells. It could also provide direct heat applications such as drying fruit and lumber, greenhouse propagation and aquaculture projects—even heating buildings.

    And there are economic benefits. Puna Geothermal Venture has 30 full-time employees and various other contractors. Many live in Puna District.

    PGV seeks to be a good neighbor, keeping the community informed of its activities via newsletter, a 24-hour response line and online information.

    Geothermal energy is the backbone of renewable energy resources in Hawaii. As the electricity demands grow, Puna Geothermal Venture stands ready to expand the project to meet the needs of the community.

    Tours of the facility, for groups or individuals, are available but must be booked in advance. Call (808) 965-6233.