The operation impact analysis of the low-potential complex due to operation efficiency of the K-300-240 turbo installation.
Students Name: Stepanyshen Roman
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: Stepanyshen R.V., Galyanchuk I.R. (supervisor). The operation analysis of the low-potential complex due to operation efficiency of the K-300-240 turbo installation. Master’s thesis. – Lviv Polytechnic National University, Lviv, 2022. Extended abstract. Energy is one of the leading sectors of Ukraine’s development. Its development depends on natural conditions, the state and development of other industries, the availability of natural energy sources [1, 2]. Energy management includes power generation stations, energy transmission networks and 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 electric energy, in the base and semi-peak part of the load schedule of Ukraine, is carried out at TPP and NPP power units. The main energy equipment has now reached its limit resource, and its further operation, without the introduction of new technologies and modernization, may lead to the occurrence of emergency accidents with corresponding consequences. In order to overcome the difficulties and troubles in the energy sector, both the introduction of new energy technologies and the improvement of existing ones are necessary. An important measure is, in particular, improvement of both schemes and modes of operation of heat transfer systems of power units. Their subsystems are complexes of heating surfaces, 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 technical, financial and security. Of all the links of the technological chain, the thermal circuit of the power plant is particularly complex. The basis for increasing the thermal efficiency of the power plant is the improvement of its steam power cycle. A modern steam power plant with a regenerative cycle has a fairly high efficiency [3]. Under the operating conditions of a steam turbine plant, when the pressure in the condenser changes, both the economic performance of the turbine and the reliability of its individual elements will change. One of the main parameters that determine, in real operating conditions, the efficiency of steam turbine plants is the pressure of spent steam. When the pressure in the condenser increases, the available heat transfer in the turbine decreases, which leads to a decrease in the thermal efficiency of the cycle and the power unit in general [3, 4]. This work is dedicated to the study of the low-potential complex of the 300 MW power unit with K-300-240 turbines in order to increase efficiency, reliability and maneuverability. In the course of research, a number of opportunities to improve the operational properties of the turbo installation and the unit as a whole were identified, which is an urgent task at the moment. Study object - thermal processes in the condenser of the K-300-240 turbine unit of the 300 MW power unit. Scope of research - the influence of heat carrier parameters in the condenser of the K-300-240 turbine on the efficiency of its operation. Goal of research - determination of the influence of the operation of the low-potential complex of the 300 MW power unit with K-300-240 turbines on the efficiency of its operation. The first section of the work provides a general description of the 300 MW power unit and its main equipment. In the second section, measures to increase the efficiency, reliability and maneuverability of the K-300-240 turbine are presented. The results of the study of the influence of the operating modes of the low-potential complex on the efficiency of the power unit are presented. The third section is devoted to the features of the variable mode of operation of the condensing unit of the K-300-240 turbine. The fourth chapter presents the results of determining the effect of vacuum on the efficiency of the steam turbine installation, in particular, the optimal mode of operation of the K-300-240 turbine condenser is established. In the economic part of the work, the cleaning of the condenser tubes during its repair was calculated and the impact of the same repair on fuel economy was determined. In the automation section, automatic regulation of the condensate level in the condenser of the K-300-240 turbine during its operation has been developed. The selection of devices and means for its operation was carried out [5]. Keywords - TPP, power unit, K-300-240 turbine, condenser, circulating water temperature, exhaust steam pressure. 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. Brodov Yu.M., Savelyev R.Z., Condensing units of steam turbines M. Energoatomizdat, 1994. - 287 p. 4. Shelepov I.G., Mikhaisky D.V., Studies of the influence of the operating modes of the NPK on the efficiency of the power unit, 2005. - 325p. 5. V.S. Mukhin, I.A. Sakov. Control devices and means of automation of thermal processes. – Higher School, 1988. – 256 p.