School of Electronics and Computer Science:
ELEC1003 Energy and Systems
Basic Information
| School | Sect- Electrical Engineering |
|---|---|
| Known as | ELEC1003. |
| Session and Semester | Neither Semester, 2011 - 2012 |
| Credit | 10 Credit Points |
| Unit Leader | not yet allocated |
| Study | 28 hours |
| Assessment | Examination 75% Coursework 25% |
| Coursework | Lab Report |
| Teaching | Lectures 24, Supervisions 5, Lab 1 |
| Referral | On referral, this unit will be assessed by examination, with the original coursework mark being carried forward (this policy is only suitable where students have had an opportunity to redeem coursework failure during the main academic year). |
| Syllabus Approved |
Description
Aims
- To introduce the students to the concept of analogous circuits.
- To develop an approach to the modelling of dynamic electromechanical systems.
- To introduce the students to the basics of the first and second laws of thermodynamics and their applications to calculation of cooling of electrical apparatus and calculation of thermal efficiency of steam and gas power stations.
- To introduce the student to the basics of heat transfer and its application to the thermal design of electrical apparatus.
Learning Outcomes
Intellectual Skills
Having successfully completed the module, you will be able to:
- Derive and solve first and second order differential equations for electrical circuits.
- Understand the concepts of p operator, transfer functions, block diagrams, poles, zeros and feedback systems.
- Determine the transfer function and step response for a system of any order.
- Derive the transfer functions for electromechanical systems including dc motors and transducers, and understand the concept of moment inertia.
- Understand the terminology of thermodynamics and be able to communicate with other engineers.
- Know the different forms of energy and understand what is meant by work and heat.
- Understand the first law of thermodynamics and the SFEE and their application.
- Understand the second law of thermodynamics and the concept of entropy.
- Solve simple thermodynamic problems involving the first and second law.
- Apply thermodynamic laws to calculate thermal efficiency of steam and gas turbines, and determine the flow rates of fluids in cooling system of electrical apparatus.
- Understand the mechanisms of heat transfer and the models and mathematical equations used to describe these mechanisms.
- Understand the concept of thermal resistance.
- Tackle simple problems using heat transfer equations and thermal resistance models.
- Use heat transfer and thermal resistance model to determine the ratings of electrical devices and the size of their heat sinks.
Topics Covered
- First Order Systems (3 lectures)
- RL, RC circuits, complementary functions; response to a unit step/ramp input.
- Second Order Systems (2 lectures)
- LC circuits (harmonic motion); RLC circuits; response to a unit step input.
- The P-Operator and Block Diagram Notation (2 lectures)
- Poles; application to ODEs, block diagram rules; feedback; transfer functions.
- The response of an nth order system to an input (2 lectures)
- Rules for partial functions.
- Rotational Electromechanical Systems (3 lectures)
- Moment of inertia; the dc motor; transducers; transfer functions.
- Introduction to Thermodynamics (2 lectures)
- Definition, importance to Electrical Engineers; thermodynamic terminology; systems (open and closed), properties, processes, cycles; work; heat; specific heat; temperature (zeroth low of thermodynamics); internal energy; enthalpy.
- First Law of Thermodynamics (4 lectures)
- First law and SFEE; specific heats of gases, application to non-flow processes, applications of SFEE to nozzles, diffusers, turbines, compressors, throttles.
- Second Law of Thermodynamics (2 lectures)
- Statement of the law; heat engines; cycle efficiency; reversible and irreversible cycles and processes; the Carnot cycle; the reversed Carnot cycle; concept of entropy.
- Heat Transfer (3 lectures)
- Definition; application in electrical engineering; heat transfer mechanisms: conduction, radiation and convection; heat transfer coefficient for natural and forced convection; concept of thermal resistance; thermal resistance calculations; application to sizing of heat sinks and calculation of current ratings of lines and cables.
- Revision (2 lectures)
- Laboratory coursework:
- Static and dynamic characteristics of an inverted pendulum.
Resources
Core Resources
- Munday A J & Farrar R A, Engineering Data Book, MacMillan 1979
- Cengel Y A, Introduction to Thermodynamics and Heat Transfer, McGraw-Hill 1997
Taught to
ELEC1003
ECS Socrates Students (Optional)Students who are not registered on an ECS approved programme may take this module subject to meeting its pre-requisites and the availability of resources. To confirm this, please can you contact the module leader (as listed above) in the first instance. They will then refer you on to the appropriate director of studies for formal approval of your selection.