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Pumps, Ventilators, Compressors
Major: Thermal Power Engineering
Code of subject: 6.144.00.O.030
Credits: 4.00
Department: Heat Engineering and Thermal and Nuclear Power Plants
Lecturer: Yurasova Oksana
Semester: 5 семестр
Mode of study: денна
Завдання: The study of the discipline involves the formation of competencies in students:
Integral competence (INT):
INT: The ability to solve complex general, specialized tasks and practical problems in the field of thermal power engineering or in the learning process, which involves the application of theories and methods of electrical engineering and is characterized by complexity and uncertainty of conditions.
General competencies of GC:
GC 5: ability to apply knowledge in practice;
GC 6: ability to search and analyze information from various sources;
GC 9: ability to solve problems and make appropriate decisions;
GC 15: potential for further learning;
Professional competencies of the specialty :
PC2: the ability to apply knowledge and understanding of scientific concepts, theories and methods necessary for solving problems of synthesis of heat and power systems for process control;
PC3: basic knowledge of technical characteristics, design features, purpose and rules of operation of heat and power equipment;
Learning outcomes: As a result of studying the discipline, the student must be able to demonstrate the following program learning outcomes:
PL 2: To know and understand the engineering sciences underlying the specialty "Heat and Power Engineering" of the relevant specialization at the level necessary to achieve other results of the educational program, including some awareness of the latest achievements of science and technology in the field of heat and power engineering.
PL 6: Identify, formulate and solve engineering problems in the field of thermal power engineering; understand the importance of non-technical (society,
health and safety, environment, economy and
industry) constraints.
PL 11: Have laboratory / technical skills, plan and
perform experimental research in heat and power engineering using
using modern methods and equipment, evaluate the accuracy and reliability of the results, make reasonable
reliability of the results, draw reasonable conclusions.
Required prior and related subjects: Prerequisites:
- Physics
- Technical thermodynamics
- Theoretical mechanics and design basics
Necessities:
- TPP turbines
- Boiler installations
Summary of the subject: Pumps, fans, compressors belong to the most common hydraulic and aerodynamic machines. They are an integral part of many technological schemes in industry, energy, transport, heat and gas supply, and ventilation of buildings and structures. The solution of a large part of the problems related to the design and operation of these machines is based on the laws and relations describing the transformation of the mechanical energy of the drive into the energy of the liquid or gas flow.The main operating parameters of machines that lift liquids and gases are considered, classifications, theory bases, characteristics, regulation methods, designs of pumps, fans, gas blowers, compressors, automated pumping units used in utilities and thermal power stations are given. The joint operation of the supercharger with the pipeline network is considered. Special attention is paid to the study of the theory of pumps and thrust machines and the features of their use in energy.
Опис: 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.
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.Pumping equipment of TPP. NPP pumping equipment. Construction and operation of pump installations.
Basic concepts and applications of centrifugal fans. The pressure developed by the fan. The influence of self-gravity on the pressure developed by smoke.
Compressor machines Compressor machines. Basic concepts.
Types of compressors. Thermodynamics of the compressor process.
Compressor power. Efficiency coefficient of compressors. Cooling. Stepwise compression. 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.
Assessment methods and criteria: Methods of assessing the level of achievement of learning outcomes of education seekers are carried out with the help of an oral survey in lecture, practical, and laboratory classes.
Assessment of knowledge is provided by current control and semester examination control.
Current control: preparation and implementation of practical classes; preparation and execution of graphic and calculation works; preparation, execution, and protection of laboratory works.
Examination control is carried out during the examination session in written and oral form.
Current monitoring of practical and laboratory classes is carried out in order to identify the student's readiness for classes in the following forms:
• a selective oral survey before the start of classes;
• frontal verification of the performance of preliminary laboratory work;
• assessment of the student's activity in the process of classes, submitted proposals, original decisions, clarifications and definitions, additions to previous answers, etc.
Examination control is carried out in the form of a written and oral survey and/or test control.
The final control is carried out based on the results of the current control and semester examination control.
Критерії оцінювання результатів навчання: Semester control - exam
Current control (30%): written reports on laboratory work, written reports on calculation works, oral examination.
Laboratory classes - 10 points
Practical classes - 20 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. Gidravlichni ta aerodinamichni mashini (nasosi, ventilyatori, gazoduvki, kompresori): Pidruchnik. –Lviv: «Magnoliya plyus», vidavec V.M.Picha, 2005. -340s.
2. Bezrodnij M. K. Teplovi nasosi ta yih vikoristannya. [Tekst] : posib. / M. K. Bezrodnij, I. I. ,Puhovij, D. S. Kutra. – K.: NTUU «KPI», 2013. – 289 s.
3. Gerasimov G.G. Nagnitachi ta teplovi dviguni. Navchalnij posibnik. – Rivne: NUVGP, 2012. 552 s.
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