The operation analysis of the system of intermediary separation and steam overheating of the K-1000-60/3000 turbine at the Khmelnytsky NPP.
Students Name: Smolii Alona
Qualification Level: magister
Speciality: Heat and Power Engineering
Institute: Institute of Power Engineering and Control Systems
Mode of Study: part
Academic Year: 2022-2023 н.р.
Language of Defence: ukrainian
Abstract: Smoliy A.A., Galyanchuk I.R. (supervisor). The operation analysis of the system of intermediary separation and steam overheating of the K-1000-60/3000 turbine at the Khmelnytsky NPP. Master’s thesis. – Lviv Polytechnic National University, Lviv, 2022. Extended abstract. Energy is the leading branch of the national economy of Ukraine. Its development, in turn, depends on natural conditions, the state and development of other industries, the technical level and productivity of industrial plants [1, 2]. Energy management includes power generation stations, networks and energy transmission systems, and end consumers. A powerful energy complex for the production, distribution and sale of thermal and electrical energy has been created in Ukraine. Centralized production of electrical energy, in the basic part of Ukraine’s load schedule, is carried out at NPP power units. Continued operation of existing equipment without the introduction of new technologies may lead to accidental accidents with corresponding consequences. In order to overcome the existing difficulties and troubles in the energy sector, it is necessary to introduce new energy technologies and improve the existing ones. An important step in the effective operation of nuclear power plants is the improvement of schemes and modes of operation of heat transfer systems of power units. Their subsystems are complexes of heating surfaces of heat exchange nodes and their aggregates. Experimental studies of modern powerful energy facilities are often necessary in non-standard intermediate modes of their operation. However, there are significant limitations to their implementation - both purely technical and financial or security. In modern conditions, the availability of computer technology has significantly expanded the possibility of applying mathematical research and mathematical tools for forecasting problems in energy [3, 4]. In this regard, the development of mathematical models of power units and methods of their application have become relevant. This work focuses on the modeling and research of a specific nuclear power plant unit, which is a superheater separator. The method used in operation allows determining the temperature characteristics of the separator of the superheater based on the known only steam temperatures at the inlet and outlet of the superheater in one of its modes of operation. Numerical absolute values of design parameters and steam consumption in SPP can be known only approximately, or completely unknown. The paper presents a mathematical study of the temperature characteristics of the SPP with the aim of increasing the efficiency of its operation in the thermal circuit of the NPP, which explains the relevance of this work. Study object - thermal processes in the steam superheater separator of the NPP turbo-installation. Scope of research - the influence of the value of the steam inlet temperature in the steam superheater separator on the efficiency of its operation. Goal of research - modeling and mode calculations of the steam superheater separator for the analysis of its operation in the intermediate load modes of the NPP power unit. In the first section of the work, the general characteristics of the NPP power unit, its thermodynamic scheme and the heat exchange units of the turbine installation are given. The second chapter presents the general characteristics of the system of intermediate separation and steam reheating and the design parameters of its main components. The third chapter is devoted to a general description of the system of intermediate separation and steam reheating at the 1000 MW power unit of the Khmelnytsky NPP. In the fourth chapter, the results of the study of the temperature characteristics of the steam superheater separator are presented and their main dependencies are constructed. In the economic part of the work, the calculation of "net" cost characteristics and "net" efficiency of the power unit during operation with intermediate and nominal load was carried out. In the automation section, automatic control of the main technological processes in the steam superheater separator of the NPP power unit during its operation has been developed. The selection of devices and means for its operation was carried out [5]. Keywords - NPP, power unit, separator, superheater, temperature characteristics, mathematical model. References. 1. Fuel and energy complex of Ukraine on the threshold of the third millennium: Scientific publication of the National Academy of Sciences of Ukraine. – Kyiv: Ukrainian Encyclopedic Knowledge, 2001. – 400 p. 2. Energy resources and flows: NAS of Ukraine. - Kyiv: Ukrainian encyclopedic knowledge, 2003. – 472 p. 3. Chaban O.Y., Galyanchuk I.R. Models and calculations of elementary convective heat exchangers Bulletin of the Lviv Polytechnic State University. Collection of scientific works No. 365. - Lviv Publishing House of the State University "Lviv Polytechnic", 1999. - p. 32-40. 4. O.Y. Chaban, M.G. Teplitskyi, A.M. Sulyk, Buzlukov. Determination of temperature characteristics of steam superheater separators during tests of NPP turbines / Heat power engineering - 1984, No. 6. - pp. 15-18. 5. Vitalyev V.P., Falikov V.S. (1997) Devices and means of automation, - M.: Stroyizdat, - 174 p.