Concentrated solar energy in deserts

Concentrating Solar Power (CSP) systems with mirrors, dishes or parabolic troughs focussing the sunlight to raise steam to run a turbines are currently in the lead. There have been some major developments in Spain and the USA, but also now in N Africa and the Middle East, with new projects opening in Morocco (the 470 MW Ain Beni Mathar hybrid project) and Egypt (the 150 MW Kuraymat hybrid project).

And more are planned. For example, the UAE is planning a 100MW project, and the Egyptian National Plan for 2012 -17 includes a 100MW Concentrated Solar Power plant in South Egypt, while the follow-up National Plan for 2018-2022 has 2,550 MW of CSP. The German-led Desertec project seeks to build on the CSP option, making supergrid links back to the EU. It has plans for a €600m 150MW CSP plant in Morocco as a first stage.

It’s hard to know what the impact of the recent political convulsions in North Africa may be, but CSP does seem likely to continue to move ahead in the region, as well as elsewhere- the largest CSP array so far planned is the 1 GW Blythe project, being developed in California by Solar Millennium LLC, on which more later.

A solar industry roadmap, as outlined in a study by A.T. Kearney and the European Solar Thermal Electricity Association, ESTELA, sees solar thermal reaching 12 GW of installed capacity globally by 2015, 30 GW by 2020 and between 60 and 100 GW by 2025. But that may prove to be pessimistic- CSP is not just limited to desert areas. For example, South Africa has a plan for a 5GW solar park, with the initial 1000MW phase, aimed for 2012, incorporating an already planned Eskom 100 MW CSP plant, which has received part funding from the World Bank.

The Indian Ministry of New & Renewable Energy’s National Solar Mission aims to generate 20GW of grid linked solar power by 2022, 50% CSP. And in Australia a new ‘Zero Carbon Australia 2020’ report has 42.5 GW of CSP supplying 60% of total electricity there by 2020.