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Cover Story | September 2015

Apply supercritical technologies, increase efficiency level

Yoshiaki Inayama, Managing Director, Toshiba JSW Power Systems Pvt. Ltd

How will this technology bring down fuel cost and its usage?

Supercritical technology has been utilised in Japan since 1960s, with an extensively good record.
Since introducing such technologies in the last five decades, we have been improving performance of steam turbines and generators by applying results of research and development work, besides improvement of thermal cycle conditions. While applying higher steam conditions Toshiba has developed materials and manufacturing technology for application of ultra-supercritical technologies. By applying these technologies, the efficiency levels can be increased to 40-42 per cent, directly reducing coal consumption and fuel cost. This has a substantial impact on generation cost of energy. The reduction is approx. 7 per cent in coal consumption, while comparing subcritical and supercritical technologies. Similarly comparing subcritical and ultra-supercritical, the reduction is to the level of approx. 11 per cent.

How many projects are you currently working on?
Toshiba is currently executing projects totalling 5,320 MW for NTPC, which includes both 660 MW and 800 MW. Our vision is to become the number one engineering, manufacturing, procurement, construction and service (EMPCS) company in the Indian power sector. To fit ourselves to lead in competition, we have set up a state-of-the-art manufacturing facility at Chennai, which has the capability to manufacture subcritical, supercritical and ultra-supercritical turbines and generators in the range of 250 MW to 1,000 MW.

How will this technology likely help towards climate change?
The application of supercritical and ultra-supercritical technology decreases fuel consumption and greenhouse gas emission, effectively reducing the social costs and enhancing the growth of the industry. Toshiba has received three supercritical project orders from NTPC, which are under implementation. The steam turbines, generator and its auxiliaries for both Meja and Kudgi projects are being manufactured in India and we have started delivery of the parts of these projects. For Darliplai Project, Toshiba will deliver products from Toshiba-JSW Chennai factory, manufactured in India. Toshiba is committed to contribute towards reducing greenhouse gases from a thermal power plant by utilising Toshiba-JSW Chennais products, complying with requirement of application of supercritical and ultra-supercritical technologies.

What is the latest development in ultra and supercritical technology?
The innovations and improvements are continuous both in products and processes, and we are committed to providing the best available technology to our customers. We are improving the technology by commercialising R&D results, improving the quality of inhouse products, improving quality of supply chain and enhancing competitiveness. Application of R&D results in steam path design optimisation has increased the efficiency level of our steam turbines and generators.

Toshiba has been developing application of material and design for advanced ultra-supercritical technology besides supercritical technology. The manufacturing facilities built in India and Japan has the capability to conduct full scale turbine tests with actual steam. Toshiba has inhouse developed materials and products with state-of-the-art manufacturing processes and testing facilities to meet the requirement of product and performance.

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