School of Technology, Energy & Apprenticeship Advanced Power Engineering Program Course Outline fall 2014 Course Code: OES 7064 Course Title: Electrotechnology, Compression and Refrigeration Prepared By: Ashvinkumar C Bulsara Date: May 2014 Revised By: Dene Allen Date: October 2014 Approved By: Click here to enter name. Prerequisite: Co-requisite: Prerequisite for: Copyright 2014 Lambton College. All rights reserved. 1
1. Course Description The course includes a more advanced study of the theory of operation of electrical machines, and electrical distribution systems; leading into a detailed look at the construction and characteristics of AC and DC motors, generators, and other electrical equipment. The other major areas of study are principles, equipment and auxiliary systems with respect to gas compression systems and large scale refrigeration plants. Safety and code requirements are emphasized. This course utilizes the college advanced compressor and refrigeration simulation models through an online operating interface to reinforce operation and troubleshooting of these systems. 2. General Education and Essential Employability Skills This course provides the following provincial Essential Employability Skills: #1: Communication #2: Numeracy #3: Critical Thinking and Problem Solving #4: Information Management #5: Interpersonal #6: Personal Is this course approved as a General Education course? No 3. Learning Outcomes Yes Students should refer to their program s restricted General Education courses for final determination. Upon successful completion of this course, the learner will be able to: 1. Explain the principle of Alternate Current theory and significance of three phase AC circuits. 2. Explain the construction and operating principles of DC generators and motors. 3. Explain the construction and operating principles of Alternate Current (AC) generators. 4. Explain the construction and operating principles of AC motors. 5. Explain the construction and operating principles of transformers. 6. Describe the protective devices used on alternators, motors, and electrical circuits. 7. Explain the design and operation of gas compressors and compressed air system. Copyright 2014 Lambton College. All rights reserved. 2
8. Explain the construction and operation of refrigeration systems 9. Explain the procedures, standards, instrumentation, and controls for a refrigeration system 10. Perform refrigeration system calculations. 4. Course Objectives Learning Outcome Reference Number Unit 1 Electrotechnology: 1.1 Explain following term related to Alternating Current : [1] i. The sine wave: generation of an alternating electromotive force; root mean square values; vector representation of sinusoidal quantities, peak, peak to peak. ii. Resistance, inductance and capacitance in single-phase A.C. circuits; inductive reactance; capacitive reactance, impedance, resonance. iii. Power in A.C. circuits; true and apparent power; practical importance of power factor; power factor correction. iv. Three-phase circuits: delta and star connected alternators and loads, current and voltage relationships; three-phase power. 1.2 Calculate impedance, reactance, true and apparent power, [1] and power factor in AC Circuits. 1.3 Calculate phase voltage, phase current and apparent and [1] true power in a three-phase AC circuit. 1.4 Explain following term related to Direct Current Machines : [2] i. Generators: principle of operation; construction; commutation; armature reaction; interpoles; compensating windings; lap and wave wound armatures; generator types and characteristics; parallel operation; voltage regulation; theory of self-excitation; efficiency and power losses; Selection of generators and applications; parallel operation; ratings. ii. Motors: principle of motor action; torque development; Fleming s left-hand rule; back electromotive force: voltage, current and speed computation; motor types and characteristics; starting arrangements; dynamic and regenerative braking; speed control; efficiency and power losses. 1.5 Calculate torque, speed and current of a DC motors. [2] 1.6 Calculate efficiency and discuss the reasons for power losses in a DC motor and generator. [2] Copyright 2014 Lambton College. All rights reserved. 3
1.7 Explain following term related to Alternating Current Generators: i. Alternators: types; construction of stators, rotors and exciters; stator windings; relationship between speed, frequency and number of pole pairs; cooling systems; shaft sealing systems; voltage regulators; synchronizing; parallel operation; power factor control, voltage drops in armatures; rating, efficiency and power losses. ii. Single-phase motors: universal, shaded pole and splitphase types; repulsion-start and reluctance-start types; capacitance starting method. iii. Polyphase induction motors; principle of operation; rotating magnetic field; slip and rotor speed; stator and rotor construction; starting methods. iv. Synchronous motors: general facts concerning synchronous motors; stator and rotor construction, starting methods. v. Transformers: principle of transformer action; ratings; efficiency and losses; short and open circuit tests; types of construction; methods of cooling; connections; paralleling; instrument transformers. vi. Protection of electrical systems: alternator stator and rotor protection devices; motor protection devices; transformer safety fittings. vii. Circuit-protective equipment; interrupting capacity; fuses; switches; circuit-breakers; relays. 1.8 Calculate load, power, iron and copper losses, and efficiency in a transformer. Unit 2 Principles of Air and Gas Compression: 2.1 Describe the design and application of compressors including a selection of prime movers. 2.2 Explain various applications of air and gas compression and effects of altitude, temperature, and humidity. 2.3 Describe the design and operations of reciprocating, rotary and axial compressor. 2.4 Describe the installation of a compressed air system showing all ancillary equipment including typical instrumentation. 2.5 Describe the regulation and control of compressors. 2.6 Describe the monitoring and protection devices for a compressed air system. 2.7 Describe the monitoring, troubleshooting, and typical preventive maintenance for a compressed air system. Unit 3 Industrial/Commercial Refrigeration [3,5,6] [5] Copyright 2014 Lambton College. All rights reserved. 4
3.1 Describe the types of refrigerants. [10] 3.2 Describe the principles and operation of vapor [8] compression, absorption refrigeration, multi-stage and cascade refrigeration system. 3.3 Describe the principles, applications and operation of heat pump and thermoelectric cycle. [8] 3.4 Describe refrigerating plants layouts and installation details. [8,9] 3.5 Describe the design and operation of compressors; [8,9] condensers; evaporators; liquid receivers; oil separators; absorbers; generators; heat exchangers; rectifiers; driers; scale traps; piping and fittings; cold room construction. 3.6 Explain Operation of refrigerating plants, starting up and [8,9] shutting down; charging; hand and automatic purging; automatic expansion valves; compressor lubrication; brine solutions; leak testing; trouble shooting. 3.7 Describe the codes and standards which apply to the [8,9] design, installation, and operation of a refrigeration plant. 3.8 Describe the purpose and operation of the various [9] operating, actuating, limiting and safety controls used in refrigeration systems. 3.9 Computations of capacities and performances of [10] refrigerating plants; ideal and practical refrigerant cycles; theoretical piston displacement; heat pump effect; theoretical power; pressure-enthalpy charts 3.10 Describe the general refrigeration cycle and the application [10] of the Carnot cycle. 3.11 Define and calculate the refrigerating effect and the mass [10] of refrigerant circulated. 3.12 Calculate the coefficient of performance for a refrigeration [10] system. 3.13 Calculate the capacity of a refrigeration machine. [10] 3.14 Calculate the theoretical power of a refrigeration compressor. 3.15 Calculate the theoretical bore and stroke of a refrigeration compressor. 5. Resources and Supplies a. Required PanGlobal Training Systems Ltd. (2013). Power Engineering Second Class (1 st ed.). Calgary, AB: Author. b. Supplemental 6. Methodology [10] [10] Copyright 2014 Lambton College. All rights reserved. 5
This course utilizes the virtual classroom and resulting interactivity to prepare candidates to challenge the 2nd Class Power Engineering exam 2B3Entirely online due to theoretical nature of material. The Instructor led virtual classroom contains: Descriptive lecture notes based on course text Examples based on industry experience Sample questions and testing in preparation for SOPEEC exam Interactive with instructor and others in class within virtual classroom Video or simulation where applicable Use of simulation model for project planning exercise 7. Student Evaluation The following elements will determine the student s final grade: Electrotechnology Test 20% Principles of Air and Gas Compression Test 20% ttetesttest Industrial/Commercial Refrigeration Test 20% Comprehensive Exam 40% Total 100% The round off mathematical principle will be used. Percentages are converted to letter grades and grade points as follows: Mark (%) Grade Grade Point Mark (%) Grade Grade Point 94-100 A+ 4.0 67-69 C+ 2.3 87-93 A 3.7 63-66 C 2.0 80-86 A- 3.5 60-62 C- 1.7 77-79 B+ 3.2 50-59 D 1.0 73-76 B 3.0 0-49 F 0.0 70-72 B- 2.7 8. Academic Integrity Lambton College is committed to high ethical standards in all academic activities within the College, including research, reporting and learning assessment (e.g. tests, lab reports, essays). The cornerstone of academic integrity and professional reputation is principled conduct. All scholastic and academic activity must be free of all forms of academic dishonesty, including copying, plagiarism and cheating. Lambton College will not tolerate any academic dishonesty, a position reflected in Lambton College policy. Students should make themselves familiar with the Students Rights and Responsibilities Policy, located on the MyLambton website for details concerning academic dishonesty and the penalties for dishonesty and unethical conduct. Copyright 2014 Lambton College. All rights reserved. 6
Questions regarding this policy, or requests for additional clarification, should be directed to the Lambton College Centre for Academic Integrity 9. Related Items Students with Disabilities If you are a student with a disability please identify your needs to the professor and/or the Accessibility Centre so that support services can be arranged for you. You can do this by making an appointment at the Accessibility Centre, Room L103 ext.3427 or by arranging a personal interview with the professor to discuss your needs. Student Rights and Responsibility Policy Acceptable behaviour in class is established by the instructor and is expected by all students. Any form of harassment or violence will not be tolerated. Action will be taken as outlined in Lambton College policy. Cheating and plagiarism are serious academic offences subject to disciplinary action. It is the student s responsibility to be aware of the cheating policy as described in the Lambton College Student Rights and Responsibilities policy. For further information on all of these policies, links may be found on the Lambton College website. Prior Learning Assessment Statement This course is eligible for Prior Learning Assessment Yes No If yes has been selected, you may choose to contact the Counselling Department for advice on Prior Learning Assessment. Date of Withdrawal without Academic Penalty Please consult the Academic Regulations and Registrar's published dates. Waiver of Responsibility Every attempt has been made to ensure the accuracy of this information as of the date of publication. The content may be modified, without notice, as deemed appropriate by the College. Note: It is the student s responsibility to retain course outlines for possible future use to support applications for transfer of credit to other educational institutions. Copyright 2014 Lambton College. All rights reserved. 7