Steam turbines account for more than half of the world’s electricity production in power plants around the world and will continue to be the dominant force in electricity power generation for the foreseeable future. The enhancement of steam turbine efficiency is increasingly important as the urgency to reduce CO2 emissions into the atmosphere is a problem at the forefront of power production.
Increasing efficiency in steam turbines, and other components of power plants, will help meet the growing demands for electricity worldwide while reducing harmful greenhouse emissions.
Steam Turbine with Long Last-Stage Blades:
Steam turbines are used in coal-fired, nuclear, geothermal, natural gas-fired, and solar thermal power plants. Also steam turbines from Turbine Manufacturers in India are increasingly needed to stabilize fluctuating power demands from solar and wind power stations as renewable energy sources grow worldwide. The current emphasis on steam turbine development is for increasing efficiency, mainly by increasing steam turbine capacity, as well as increasing operational availability, which translates to rapid start up and shut down procedures.
What are Steam Turbines?
Steam turbines convert thermal (heat) or kinetic (movement) energy to mechanical energy by using rotating blades. More specifically, these rotating stator blades accelerate high pressure and temperature steam which then provide impulse and reaction forces to the rotating blades. The torque generated by this steam force on the rotating blades is then transferred to the rotor.
Turbine Suppliers in India produces steam turbines can come in all shapes and sizes, ranging from a single stage design to a multi-stage machine. A stage consists of a set of stator blades and a set of rotating blades and every stage and blade row are designed to provide the most efficient flow path and aerodynamic behavior possible. The efficiency of steam turbines increases with increasing inlet temperature and inlet pressure; however, limits are imposed due to the thermal and structural limits of blade shapes and materials.
Reheated Rankin Cycle Temperature-Entropy Chart:
Other methods to improve thermal efficiency are vast and ever growing. A reheat cycle takes exhaust steam from the high-pressure turbine and returns it to the boiler to then expand in the intermediate-pressure turbine. A regenerative cycle extracts steam to the feed water heater from intermediate stages of the turbine, which is used to heat feed water to the boiler, resulting in reduced heat loss to the cooling tower from the condenser. Reheat and regenerative cycles can also be combined at the cost of additional system complexity and equipment costs.
Condensing Steam Turbine with Four Regenerative Extractions Designed in NCON Turbines Power Turbine Manufacturers
How do you increase efficiency in steam turbines?
Increasing short blade heights in high-pressure and intermediate-pressure turbines leads to increased capacity and therefore improved efficiency. The largest and second largest losses in typical steam turbines are the low-pressure blade loss and low-pressure exhaust loss respectively. These losses are directly related to the last-stage blades. Developing longer and highly efficient last-stage blades is one of the most important challenges faced by engineers in steam turbine design.
3D View of a 10MW Steam Turbine Designed in NCON Turbines
The design of a steam turbine is an inherently complex task that requires in depth knowledge from many fields of engineering. The development of such a machine is a big investment that is essential for today’s economy and modern life. Turbine Manufacturing Companies will continue to provide the world with the majority of electricity for the foreseeable future. The technological innovations currently being developed will continue to improve the efficiency and longevity of steam turbines.
The design of steam turbines is more accessible than ever with the software platform NCON Turbines that has an all-encompassing approach to the process of turbo machinery design. These tools will ensure that the technology of steam turbines will continue to improve, and new ideas and innovations will continue to be developed.
Interested in learning more about steam turbines or NCON Small Steam Turbines Manufacturers? Get in touch at Info@nconturbines.com. We’d love to chat with you!
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