Hello sunshine! Hot new projects part 1: receivers and heliostatsPosted: Thursday, 31st January, 2013
We’re making solar thermal heliostats and receivers cheaper and work better.
As you may have read in a previous post, a bunch of solar projects were recently given the green light by the Australian Renewable Energy Agency (ARENA). We’re going to run a series of posts on the CSIRO-led projects so you know exactly what some of our scientists will be working on for the next few years. First up… ‘Optimisation of central receivers for advanced power cycles’.
Let’s call this the ‘Lego’ project. We’re pulling apart the most important Lego bricks that make up concentrated solar power (CSP) technology and making them cheaper and work better: the heliostats and the receiver.
Heliostats (or mirrors) make up the ‘solar field’, they concentrate the sunshine and reflect it onto a receiver (check out the process here).
Our field in Newcastle has 450 heliostats, however some fields have thousands. As you can imagine it is a major cost for a solar power plant and there are still many improvements to be made around field layout, heliostat size, performance and lifecycle. This project will investigate all of these areas to help develop the next generation of ultra low-cost heliostats and field design.
After we reduce the price of heliostats, we move to the receivers. Our receivers need to work efficiently at temperatures exceeding 800 degrees Celsius (that’s about as hot as lava spewing from a volcano), so this is a challenge. We also need to work out the best type of receiver system for the various solar field layouts.
If we can improve the efficiency with which the heliostats and receiver work together, we can reduce the cost of supplying heat to the turbine, which reduces the cost of solar power.
It’s a big job. The project is worth $3.2 million and we’ll be working with Graphite Energy in Australia plus the U.S. Department of Energy’s national laboratories. Hopefully they’re good at playing with Lego.
For more Lego fun, check out CSIRO’s new ship, the Investigator, made of Lego.