1 / 10

THEME PAPER ON

THEME PAPER ON. SUPER-CRITICAL . AND. ULTRA SUPER-CRITICAL . POWER PLANTS. Prof. D.N. Reddy Director Centre for Energy Technology and Principal University College of Engineering Osmania University Hyderabad – 7. NEXT GENERATION POWER PLANTS. Criteria for selection Efficiency

vanya
Télécharger la présentation

THEME PAPER ON

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. THEME PAPER ON SUPER-CRITICAL AND ULTRA SUPER-CRITICAL POWER PLANTS Prof. D.N. ReddyDirectorCentre for Energy Technologyand PrincipalUniversity College of EngineeringOsmania UniversityHyderabad – 7.

  2. NEXT GENERATION POWER PLANTS Criteria for selection • Efficiency • Environmental protection • Availability of fuel • Power generation cost • Investment costs • Financing

  3. Main advantages of Super-Critical Steam Cycle • Reduced fuel cost due to improved thermal efficiency • Reduction of CO2 emissions by 15% per unit of Power generated compared to sub-critical • Very good part load efficiencies • Plant costs are comparable with sub-critical units

  4. Very low emissions NOx, SOx and particulate using modern Flue Gas Clean-up Equipment (FGD) Sub-critical units operating below 221.2 bar pressure and 374.15oC Super-critical units - Coal Fired Oil / Gas FBC, HRSG

  5. Current State-of-Art Super-critical Steam Power Generation Plants Pressure - 300 bar Temperature - 600oC Efficiency - 45% (LHV Basis) Nickel based alloys allows up 650oC By the year 2005 - 620 oC By the year 2020 - 650-700 oC Cycle Efficiency - 50-55%

  6. Steam Cycle Optimization • Improvement of Plant-auxillaries efficiency • Cycle layout • Increasing Feed water temperatures • Reducing flue gas temperature • Use of vertical furnace wall tubing Supercritical units potential Present - 5 GW 2020 - 25-40 GW/per annum

  7. R&D in Super-Critical • Materials Limitations are major factors limiting further development, with key constraints at the furnace wall, super heater and re-heater outlets, and the first stage of the HP and IP turbines. • Other developments are under way, mostly by individual manufacturers to Optimize Cycle Design improve individual components, which are resulting in incremental heat rate improvements.

  8. No significant opportunities for Retrofit ofSuper-Critical Technology to existing (predominantly sub-critical) plants have been identified. • FBCs using Super-Critical Steam Cycles are now being developed. A 350 MW PFBC is under construction in Japan.

  9. The indications are that HRSGs will progressively move to Once-Through Technology and then to supercritical pressures as GTs become larger and exhaust temperatures rise. • Power Cycle Optimization taking into account such parameters as the number of reheats employed, inlet steam conditions and feedwater heater arrangement.

  10. Than'Q'

More Related