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Adoption of Supercritical Technology in India- A ‘Rationale’. India have a considerable potential for adding up new power generation capacity based on coal, having proven reserves of over 202 billion tones.
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Adoption of Supercritical Technology in India- A ‘Rationale’
A number of design changes are also being developed to allow higher temperatures and pressures to be used are
(a) Partial triple-casing on turbines or use of inlet guide vanes to reduce the peak pressures seen by the HP cylinder
Some of the highlights of the development are:
bled-steam tapping off the HP cylinder
In principle, supercritical steam cycles can be used for any technology using a steam cycle to generate electricity. Supercritical plant can therefore be incorporated into:
The cost data has been obtained through literature survey for the following four main variants of SC / USC plants.
Normal pace…2 and ½ years
Accelerated TOT…2 years
Normal pace…3 and ½ years
Accelerated TOT…3 years
Normal pace…6 and ½ years
Accelerated TOT…5 years TRANSPARANCIES
For the indigenous development through a systematic transfer of technology (TOT), the corresponding figures are:
This cost does not include the cost of transfer of technology and the time required for TOT and consequent add on to the cost. In case of partial import, the cost shall lie between above two sets of figures.
Country SC Plant PF 580
USA 5.985 Cr. / MW
Europe (Germany) 5.396 Cr. / MW
Japan 5.130 Cr. / MW
Cost of indigenous SC plant (PF 580…246 b and 538/565 C) suitable for Indian coals using about 70% indigenous materials, would be of the order of 3 Cr./MW at today’s exchange rate (Cost of TOT shall be extra)
(a)Pit head station specifically Sipat STPP of NTPC
(b) Load-centered station (coastal), about 1200 km from coal source
Following five cases based on steam conditions were analyzed:
ØMaximum cost impact is found for a load center SCU station firing ROM coal, both for land and land-cum-sea transport between above two Cases. This is of the order of 288 Crores. Heat rate improvement is also highest in this case.
ØCost of generation is least for a Pit- head Washed coal fired Unit amongst all other Super Critical Units.