24-09-2014, 02:30 PM
HP AND IP ELEMENTS BHEL HP elements utilize a unique barrel design that does not require a massive horizontal joint flange. The circular cross-section of the inner and outer casings reduces stress risers to minimize joint maintenance issues. The barrel design uniformly controls thermal expansion, permitting rapid load changes. For IP and combined HP/IP cylinders, BHEL employ an advanced inner casing design with stiffening ribs on the top and bottom to balance the thermal stresses created by the horizontal joint. Thus, all designs follow the principle of circumferential symmetry for low stress and mechanical integrity. For high-temperature application BHEL employ a special vortex cooling arrangement in HP and IP turbines, which can significantly lower rotor temperature and related material concerns. BHEL employ full-arc admission, which has proven to be the most efficient and reliable design by eliminating potential control stage problems and allowing for rapid and efficient load-follow. By incorporating full-arc admission into design concept we are able to decrease the number of
• Blade Replacement 3-dimensional blading · Advanced Shaft Sealing - Retrofitting with retractable, brush, and abradable sealing • Major Component Modernization Options - Entire replacement steam paths utilizing state-of-the-art materials • Condenser Optimizations