Home/ Majors directory/Nuclear Power Engineering/Compressors, Ventilators and Pumps
Compressors, Ventilators and Pumps
Major: Nuclear Power Engineering
Code of subject: 6.143.00.O.028
Credits: 4.00
Department: Heat Engineering and Thermal and Nuclear Power Plants
Lecturer: Yurasova Oksana
Semester: 5 семестр
Mode of study: денна
Завдання: As a result of studying the academic discipline, the student should be able to demonstrate the following learning outcomes:
• learn: the classification and types of machines for supplying liquids and gases, which are used at thermal power facilities; the basics of the theory and principle of operation of centrifugal, axial and volumetric pumps; basics of the theory and principle of operation of fans and compressors; methods of regulating the performance of machines for supplying liquids and gases;
• be able to design, operate, organize adjustment and repair of pump, compressor and ventilation equipment at nuclear power plants.
The study of an academic discipline involves the formation and development of students' competencies:
general:
• ability to analyze and synthesize;
• ability to apply knowledge in practice;
• the ability to search, analyze and critically evaluate information from various sources;
• the ability to solve tasks and make appropriate decisions;
• potential for further education;
professional:
• basic knowledge of scientific concepts, theories and methods necessary for understanding the principles of operation and functional purpose of nuclear and thermal power systems of nuclear power plants and their equipment;
• basic knowledge of technical characteristics, design features, purpose and rules of operation of nuclear and thermal power plant equipment;
Learning outcomes: -to know: classification and types of machines feed liquids and gases; basic theory and principle of centrifugal, axial and volumetric pumps; basic theory and principle of fans and compressors; methods of regulation performance machines for feeding liquids and gases;
- be able to design, operate, organize, adjustment and repair pump, compressor and ventilation equipment.
Required prior and related subjects: • Technical Thermodynamics;
• Heat and Mass Transfer;
Summary of the subject: The main processes and structures in hydraulic and aerodynamic machines, methods of determining the parameters and functional characteristics of compressors and pumps are considered. A complete review of the types and designs of compressors, fans, and pumps is given, as well as the application of the laws of hydroaeromechanics and thermodynamics to the description of compression processes and the movement of the working medium in them. Special attention is paid to the basics of calculating hydraulic and aerodynamic machines, functional characteristics of centrifugal compressors, fans and pumps and their application in operational tasks.
Опис: Introduction Atomic energy. The place of nuclear energy in electricity generation. The main stages of the development of nuclear energy in Ukraine. Peculiarities, current state and prospects of NPP development.
Topic 1. Compressor machines
Compressor machines. Basic concepts. Types of compressors. Thermodynamics of the compressor process.
Compressor power.
Efficiency coefficient of compressors. Cooling. Stepwise compression.
Centrifugal compressor power. Centrifugal compressor stage.
Indicator diagram of a piston compressor. Harmful space. Supply of a piston compressor.
The influence of harmful space on the supply of a reciprocating compressor.
The influence of the degree of pressure increase on the supply of the compressor.
Basic concepts and applications of centrifugal fans. The pressure developed by the fan. The influence of self-gravity on the pressure developed by smoke.
Topic 2. General information about machines for supplying liquids and gases
Classification. Fields of application of machines for supplying liquids and gases. Jet pumps. Periodic pneumatic lifter. The scheme of the riser for liquids.
The main operating parameters of machines that lift liquids and gases. Graphical explanation of the equation for determining the total head developed by the pump. Power and efficiency of the pump, fan. Cooperation of the pump and pipeline system.
2
Topic 3. Centrifugal pumps and fans
The principle of operation of centrifugal machines. Parallelograms of velocities at the entrance and exit of interblade channels. Euler's equation. Theoretical and actual pressures developed by the impeller.
The influence of the angle ?2 on the pressure developed by the centrifugal machine. Types of impeller blades. The influence of the angle on the static and speed components of the theoretical pressure in relation to the three main types of working blades.
Leads and leads. Hydraulic, volumetric and mechanical efficiency of a centrifugal machine. Multi-step and multi-flow centrifugal machines.
Theoretical characteristics of a centrifugal machine. Actual characteristics of a centrifugal machine at a constant frequency of rotation.
Similarity of centrifugal machines. Formulas of proportionality. Recalculation of characteristics when changing the frequency of rotation of the machine shaft. Testing the pump. Throttle regulation of supply at constant speed.
Adjustment of feed by changing the frequency of rotation of the machine shaft. Adjustment of feed with rotary blades at the entrance to the impeller. Parallel connection of centrifugal pumps Series connection of centrifugal pumps.
Cavitation. Measures preventing the occurrence of cavitation. Admissible suction height.
The main parts of the construction of centrifugal pumps.
Assessment methods and criteria: • Current control (30%): oral examination, written reports of laboratory work
• Final control (70% of exam): control measures
Критерії оцінювання результатів навчання: Semester control - exam
Current control (30%): written reports on laboratory work, written reports on calculation works, oral examination.
Laboratory classes - 15 points
Practical classes - 15 points
Final control (70 %, control measure): written-oral form (70%)
Written component – 60 points
Oral component – 10 points
Порядок та критерії виставляння балів та оцінок: Points for current and exam control are assigned as a percentage of the maximum score for the educational material of the component based on the following criteria for evaluating the knowledge and skills of the student:
100–88% – awarded for a high level of knowledge (some inaccuracies are allowed) of the educational material of the component contained in the main and additional recommended literary sources, the ability to analyze the phenomena being studied, in their relationship and development, clearly, succinctly, logically, consistently answer the questions, the ability to apply theoretical provisions when solving practical problems;
87–80% – awarded for knowledge of the educational material of the component above the average level, including calculations, reasoned answers to the questions asked (a small number of inaccuracies are possible), the ability to apply theoretical provisions when solving practical problems;
79–71% – a generally correct understanding of the educational material of the component, including calculations, and reasoned answers to the questions, which, however, contain certain (insignificant) shortcomings, is awarded for the ability to apply theoretical provisions when solving practical problems;
70–61% – awarded for mediocre knowledge of the educational material of the component, weak application of theoretical provisions when solving practical problems;
60–50% – awarded for weak knowledge of the educational material of the component, for weak application of theoretical provisions when solving practical problems;
49–26% – is presented for ignorance of a significant part of the educational material of the component, inability to apply theoretical provisions when solving practical problems;
25–00% – awarded for ignorance of a significant part of the educational material of the component, inability to navigate when solving practical problems, ignorance of the main fundamental provisions, and failure to complete the task.
Recommended books: 1. Mandrus V.I. Hidravlichni ta aerodynamichni mashyny (nasosy, ventylyatory, hazoduvky, kompresory): Pidruchnyk. –L?viv: «Mahnoliya plyus», vydavets? V.M.Picha, 2005. -340s
2. Cherkasskyy V.M. Nasosy, ventylyatory, kompresory. M.: Enerhoatomyzdat. 1990h. -416s.
3. Sherstyuk A.N. Nasosy, ventylyatory, kompresory. M.: Vysshaya shkola. 1989h.-344s.
Уніфікований додаток: Lviv Polytechnic National University ensures the realization of the right of persons with disabilities to obtain higher education. Inclusive educational services are provided by the Service of accessibility to learning opportunities "Without restrictions", the purpose of which is to provide permanent individual support for the educational process of students with disabilities and chronic diseases. An important tool for the implementation of the inclusive educational policy at the University is the Program for improving the qualifications of scientific and pedagogical workers and educational and support staff in the field of social inclusion and inclusive education. Contact at:
St. Karpinsky, 2/4, 1st floor, room 112
E-mail: nolimits@lpnu.ua
Websites: https://lpnu.ua/nolimits https://lpnu.ua/integration
Академічна доброчесність: The policy regarding the academic integrity of the participants of the educational process is formed on the basis of compliance with the principles of academic integrity, taking into account the norms "Regulations on academic integrity at the Lviv Polytechnic National University" (approved by the academic council of the university on June 20, 2017, protocol No. 35).