There were two announcements on Thursday about renewable energy plants coming to New Mexico.

Gov. Bill Richardson announced a solar thermal plant which will be built in Santa Teresa, and members of the state’s congressional delegation announced a woody biomass plant in southern New Mexico.

The solar thermal plant, which a Richardson press release called “New Mexico’s Suntower” will be a 92 megawatt concentrating solar thermal facility.

This plant will not be operating with the photovoltaic panels that many think of when they hear about solar energy.

Solar thermal power, according to the Economist , is created when “mirrors concentrate sunlight to produce heat. That heat is then used to create steam, which in turn drives a turbine to generate electricity.”

U.S. Sens. Tom Udall and Jeff Bingaman and U.S. Rep. Harry Teague, meanwhile, announced today that a woody biomass facility will be coming to New Mexico because of the stimulus package passed by Congress and signed by President Barack Obama earlier this year.

The $2.5 million in funding will go towards a Woody Biomass Energy Development project. The project includes 5 megawatt wood pellet production plant which will work with a Mescalero Apache Tribe sawmill.

The plant will run from wood from forest-thinning designed to protect the Lincoln National Forest from fire danger.

“It not only helps us continue our shift toward renewable energy, it also allows us to responsibly thin forested communities,” Bingaman, the chairman of the Senate Energy and Natural Resources Committee said of the biomass plant, is quoted as saying in a statement.

“This cutting-edge facility will turn New Mexico’s renewable energy potential into reality, and it will add a green boost to our economy,” Richardson said of the solar thermal plant in a release.

Richardson also said that the plant will keep “our state on the path toward efficiently utilizing our natural resources and moving us toward a clean energy economy.”

So why solar thermal? Again from the Economist:

Solar-thermal power stations have several advantages over solar-photovoltaic projects. They are typically built on a much larger scale, and historically their costs have been much lower. Compared with other renewable sources of energy, they are probably best able to match a utility’s electrical load, says Nathaniel Bullard of New Energy Finance, a research firm. They work best when it is hottest and demand is greatest. And the heat they generate can be stored, so the output of a solar-thermal plant does not fluctuate as wildly as that of a photovoltaic system. Moreover, since they use a turbine to generate electricity from heat, most solar-thermal plants can be easily and inexpensively supplemented with natural-gas boilers, enabling them to perform as reliably as a fossil-fuel power plant.

The solar thermal plant will provide 220 “green” construction jobs in southern New Mexico, and will provide more than 20 permanent, full-time jobs when the plant is fully operational.

Bingaman, Udall and Teague, all New Mexico Democrats, each praised the fact that the biomass plant would create jobs, but a specific number was not provided.