NTPC awards the contract for Asia’s first integrated solar thermal power plant


Thermax and Frenell have been awarded by India’s state owned utility NTPC, to execute Asia’s first integrated solar thermal power plant at Dadri in Uttar Pradesh, India. The project involves the integration of a concentrated solar field into the Dadri coal fired power station.

The solar field will use Frenell’s proprietary concentrated solar power (CSP) technology which is based on flat mirror Fresnel collector principle. On a surface of 33,000 m2, the solar field will feed annually 14 GWh of solar thermal energy into the water-steam cycle of a 210 MW unit of the power station. The mirrors concentrate the sunlight on absorber tubes and heat the fluid up to 250°C which are the parameters required for the power station unit. The heat generated from the solar field will heat the feed water supplied to the steam generator, allowing for lower coal consumption and thereby reducing the emission of greenhouse gases.


In a competitive tender process among three international EPC companies, the Fresnel technology won out over parabolic trough and solar tower technology and the contract has been awarded to the consortium of Thermax and Frenell. Thermax will be acting as the EPC contractor to NTPC and is responsible for design, engineering, procurement and supply of the entire solar thermal plant and balance- of- plant equipment as well as for the integration of the solar field into the coal fired power station. Frenell will deliver its CSP technology as subcontractor and will execute the turnkey manufacturing and construction of the solar field.

This project is of high strategic importance for India as it introduces a new option for power generating companies to improve the efficiency of their coal fired power stations. This solution will also contribute to the national target of at least 3% solar share of total power generation by 2022.