Quantcast

World’s First 24/7 Solar Power Plant Powers 75,000 Homes

Energy

SolarReserve's Crescent Dunes Project in Tonopah, Nevada is quietly providing clean, green solar energy to 75,000 homes in the Silver State even when the sun isn't shining.

The 110-megawatt Crescent Dunes Solar Energy Plant in Nevada is the first utility-scale concentrated solar plant in the world. Photo credit: SolarReserve

Crescent Dunes is the first utility-scale facility in the world to use molten salt for power energy storage capabilities, a technology also known as concentrated solar.

With a concentrated solar plant such as Crescent Dunes—including other plants like it around the world—more than 10,000 movable mirrors, or heliostats, reflect solar energy to a central, 640-foot tower that heats up salt to 1,050 degrees Fahrenheit.

This salt is used for two purposes, as SolarReserve points out on its website. First, it retains very high levels of heat, making it like a thermal battery that can be used night and day, whether or not the sun is out. Second, when electricity is needed on the grid, the molten salt gets dispatched through a heat exchanger to create super-heated steam to power a traditional steam turbine.

This process is similar to a conventional fossil fuel or nuclear power plant except with zero carbon emissions or hazardous waste and without any fuel costs, the California-based solar company says.

"The whole project cost slightly under $1 billion and SolarReserve holds a 25-year contract to supply power to NV Energy for $135 per megawatt hour," OilPrice.com observed. "The tower produces 110 megawatts of energy for 12 hours a day according to the company, which works out to roughly 1 million megawatts per year. This in turn implies a gross [return on assets] of ~13.5 percent—not bad as investments go."

The method is different compared to photovoltaic technology, which harnesses the sun's rays on panels that convert sunlight into electricity. While photovoltaic arrays have many benefits and the technology has been well-tested and proven, its biggest problem is when the sun is not out.

As EcoWatch mentioned previously, a solar system’s peak generation hours do not coincide with the utility’s peak load hours after 5 p.m., meaning power companies turn to high-carbon peaking turbines in the evenings, thus decreasing the environmental benefits of solar panels.

The facility will generate solar power for 75,000 homes in Nevada during peak demand periods, day and night. Photo credit: SolarReserve

"The plant is noteworthy for what it accomplishes—it is the first truly 24-7 solar plant in the world. For many applications that is a very big deal," OilPrice.com adds about the Crescent Dunes project. "Having to build a second power plant to back up a solar array is not an ideal solution to say the least. Thermal solar resolves that issue all while letting facilities like SolarReserve’s store 1,100 megawatt-hours of energy."

Residential or grid-scale battery systems, such as the ones manufactured by Tesla, are an another emerging solution to solar storage issues but the technology is relatively new.

Solar thermal plants are setting up in sun-spoiled deserts around the world. The Ivanpah Solar Electric Generating System in the California Mojave Desert is the largest concentrated solar plant in the U.S., spanning 3,500 acres and has 377 megawatts of net generating capacity. The facility, however, is experiencing widely reported "engineering hiccups," including a fire that broke out in May.

Dubai's massive Mohammed bin Rashid Al Maktoum Solar Park is another notable concentrated solar plant that will hold the distinction of being the world's largest once it's operational in April 2017. The facility aims to produce 1,000 megawatts by 2020 and 5,000 megawatts by 2030. The solar park also broke the record of having the world's cheapest solar on May 1 when five international companies bid as little as 2.99 cents per kilowatt-hour to develop the plant's latest phase of work.

Besides Crescent Dunes, SolarReserve is developing two other concentrated solar plants. The venture is building the Redstone Solar Thermal Power Project in the town of Postmasburg in South Africa, which will be the first concentrated solar plant in Africa. The other is the Copiapó Solar Energy Project in Chile which will combine both concentrated solar and photovoltaics, making it the first facility of its kind in the South American country.

YOU MIGHT ALSO LIKE

Nation’s Largest Residential Solar Storage Project to Launch This Summer

Here’s How We Get to 100% Renewable Energy

David Suzuki: Feed-In Tariffs Accelerate the Renewable Energy Revolution

Apple Is Generating So Much Renewable Energy It Plans to Start Selling It

EcoWatch Daily Newsletter

Pexels

The world's population will hit 10 billion in just 30 years and all of those people need to eat. To feed that many humans with the resources Earth has, we will have to cut down the amount of beef we eat, according to a new report by the World Resources Institute.

Read More Show Less

Beachgoers enjoying a pleasant evening on Georgia's St. Simons Island rushed into the water, despite warnings of sharks, to rescue dozens of short-finned pilot whales that washed ashore on Tuesday evening, according to the New York Times.

Read More Show Less
Sponsored
Golde Wallingford submitted this photo of "Pure Joy" to EcoWatch's first photo contest. Golde Wallingford

EcoWatch is pleased to announce our third photo contest!

Read More Show Less

Six Extinction Rebellion protesters were arrested as they blocked off corporations in the UK. The group had increased their actions to week-long nationwide protests.

Read More Show Less
Sari Goodfriend

By Courtney Lindwall

Across the world, tens of thousands of young people are taking to the streets to protest climate inaction. And at the historic Apollo Theater in Harlem last month, more than a dozen of them took to the stage.

Read More Show Less
Sponsored
Pumpjacks on Lost Hills Oil Field in California. Arne Hückelheim, Wikimedia Commons

By Julia Conley

A national conservation group revealed Wednesday that President Donald Trump's drilling leases on public lands could lead to the release of more carbon emissions than the European Union contributes in an entire year.

Read More Show Less
Pixabay

By Marlene Cimons

For nearly a century, scientists thought that malaria could only spread in places where it is really hot. That's because malaria is spread by a tiny parasite that infects mosquitoes, which then infect humans — and this parasite loves warm weather. In warmer climates, the parasite grows quickly inside the mosquito's body. But in cooler climates, the parasite develops so slowly that the mosquito will die before the it is fully grown.

Read More Show Less
The summit of Mauna Kea in Hawaii, which is considered sacred by some Native Hawaiians. Charmian Vistaunet / Design Pics / Getty Images

A decade-long fight over the proposed construction of a giant telescope on a mountain considered sacred by some Native Hawaiians came to a head Wednesday when 33 elders were arrested for blocking the road to the summit, HuffPost Reported.

Read More Show Less