Como funciona o estágio Curtis nas TURBINAS A VAPOR?

Did you like this video? Register your email at the link below to receive notification of new videos about TURBINE VAPOR like this: https://forms.gle/Kc8Ei6rxB7cm6qVGA YouTube Channel - Subscribe to receive updates:    / @turbivap   Follow on LinkedIn:   / turbivap   Whatsapp: Join my list on STEAM TURBINES https://wa.me/5519997155350?text=Ol%C... Access the website: https://www.turbivap.com.br Contact: [email protected] About the channel: TURBIVAP is the TURBINE STEAM Channel, a space for sharing content and information about STEAM TURBINES and the energy cogeneration sector, aimed at the entire user chain: manufacturers, suppliers, customers, engineers, mechanics, buyers, etc. Proposal to strengthen the sector in the exchange of information and experiences about STEAM TURBINES and related equipment. _______________ CURTIS STAGE OF STEAM TURBINES Parsons, Curtis, Rateau and Zoelly had the same objective, using steam energy at high temperature and pressure in turbines, trying to minimize the disadvantage of a very high rotation speed. Down here in the description of this video there is a link for you to register your e-mail, if you have not registered, register there quickly and as soon as this material is finished I will send it to you and I will also leave the card up here as soon as the content is available. The common speed stages used in steam turbines to this day are still those types of Curtis (Speed) or Rateau (pressure) stages. So I'll talk about them, starting today with the Curtis stage and in the next video I'll talk about Rateau stage The Curtis stage combines the principles of the Parsons and De Laval turbines, that is, a comparatively high initial speed is given to the steam through expansion in an expander as in the De Laval turbines and as in the Parsons turbines this speed is absorbed by the successive action of a set of fixed and movable reeds. With this difference, (that while in the Parsons turbine there is a difference in pressure between the two sides of each wheel to induce the flow for a continuous expansion of the steam), in the Curtis stage the wheels are used simply to absorb the speed or moment already generated by the expansion in the expander. The Curtis stage was designed to be of maximum power, extracting a large amount of energy from the steam. In a speed stage (Curtis), it is possible to take advantage of a large enthalpy jump, although with some loss of efficiency. The Curtis stage has two characteristic applications: Single stage turbines with low power, obtaining a more compact turbine, of lower cost, but less efficient. The Curtis stage is also widely used in the first stage of high powered machines, which normally receive high pressure and temperature steam. So it is advantageous for the design of a thermodynamic machine such as a steam turbine that the steam in the first stage suffers a large drop in enthalpy. This has the advantage of allowing a greater pressure drop at each stage and, consequently, fewer stages are required, resulting in a smaller, shorter turbine for a given pressure drop. How the CURTIS internship works When the main steam enters the turbine with high temperature and pressure, it passes through the expander first (on the expander plate). The speed of the steam in the block or expander increases the speed and decreases the pressure as the steam passes through these expanders. In an action turbine, the only time that a pressure drop occurs is when the steam passes through the expander nozzle. After the steam passes through the expanders, it passes through the first row of moving vanes that are in motion. In this first row the mechanical work is extracted from the steam, causing the speed to drop. After passing through that first row of steam, the steam passes through the fixed vanes. The sole purpose of the fixed vanes is to redirect the steam from the first row of wheels to the second row of blades