Open AccessENHANCEMENT OF STEAM-TURBINE CONDENSER STEAM-JET EJECTOR
Author(s) -
Madina Shavdinova,
AUTHOR_ID
Publication year - 2021
Publication title -
eurasian physical technical journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.194
H-Index - 2
eISSN - 2413-2179
pISSN - 1811-1165
DOI - 10.31489/2021no4/52-58
Subject(s) - injector , surface condenser , heat recovery steam generator , condenser (optics) , steam electric power station , nuclear engineering , steam turbine , jet (fluid) , turbine , mechanical engineering , boiler (water heating) , stage (stratigraphy) , cogeneration , environmental science , engineering , power (physics) , waste management , superheated steam , combined cycle , electricity generation , thermodynamics , physics , aerospace engineering , paleontology , light source , optics , biology
A three-stage steam-jet ejector EPO-3-200 with a working steam flow rate of 850 t / h is installed at the Combined Heat and Power Plant-2 of the city of Almaty on heating turbines. In this paper, the replacement of the existing three-stage steam-jet ejector with a two-stage steam-jet ejector is proposed and substantiated. As a result of the replacement, they obtained a saving of heat (steam) for their own needs for the production of electrical energy. It has been established that at a pressure in the turbine condenser significantly lower than 100 kPa, it is advisable to install a new two-stage ejector EPO-2-80 instead of EPO-3-200. Using the existing calculation methods, the geometric characteristics of the new ejector were obtained. The working steam flow rate of the new two-stage ejector is 579 t / h. In addition, the use of two stages makes it possible to simplify the design and make it more reliable, and also makes it possible to increase the pressure in the cooler of the 1st stage of the ejector. This is especially important for cogeneration turbines, which may have a high temperature of the main condensate, which adversely affects the performance of a conventional three-stage ejector.