| CODE | MEC3307 | ||||||||||||
| TITLE | Thermodynamics 2 | ||||||||||||
| UM LEVEL | 03 - Years 2, 3, 4 in Modular Undergraduate Course | ||||||||||||
| ECTS CREDITS | 5 | ||||||||||||
| DEPARTMENT | Mechanical Engineering | ||||||||||||
| DESCRIPTION | This study-unit builds on MEC1405 and has four main focus areas, flow, combustion, cycles and air compressors. The first focus area on flow discusses fluid flow of gas and vapour through ducts of constant/varying cross section area, the critical pressure ratio, efficiency of nozzles and diffusers, the meta-stable state, and the total/stagnation condition. The second focus area on combustion discusses stoichiometry, the products of combustion, the calorific value, the enthalpy of combustion, the application of the first law to combustion processes, the adiabatic flame temperature, and dissociation. The third focus area on cycles discusses the air-standard cycles, namely Carnot Cycle, Otto Cycle, Joule Cycle, Diesel Cycle, Mixed Combustion Cycle, Ericsson Cycle, Sterling Cycle. The open and closed gas turbine cycle is covered with optimization of gas turbine cycle, the cycle with regenerator, the effects of variable specific heats and the cycle for jet propulsion. It also discusses the air refrigeration cycle. The third focus area includes the vapour cycles, that is the Simple Rankine cycle, the Rankine cycle with re-heat, the regenerative cycle, the back-pressure turbine and extraction turbine cycles, the Binary cycle, the Combined Cycle. The reverse cycle, that is the vapour compression refrigeration cycle and heat pump cycle are also covered. Finally, the fourth focus area discusses reciprocating air compressors, and covers single and double acting machines, the effect of clearance volume, multi-staging and intercooling. The isothermal and volumetric efficiencies are also covered. Study-Unit Aims: - To familiarise students with flow of gases and vapour through ducts with appreciable density changes and high-pressure ratios. Introduce students to flow against pressure gradient and flow separation effects; - To familiarize students with combustion equations, determination of stoichiometry and the analysis of combustion through exhaust analysis; - To deliver methodologies of analysis of thermodynamics cycles, gas and vapour. To deliver the concept of dependence of maximum efficiency on cycle used. To introduce the concept of refrigeration as a reverse cycle; - To deliver to students the methodology for calculations pertaining to air compressors. Learning Outcomes: 1. Knowledge & Understanding: By the end of the study-unit the student will be able to: - Provide a written calculative analysis of thermodynamic ideal cycles that are used to generate mechanical work; - Provide a written calculative analysis of vapour compression refrigeration; - Calculate stoichiometry and emission concentration on a wet and dry basis; - Calculate relevant parameters for air compressors, nozzles and diffusers. 2. Skills: By the end of the study-unit the student will be able to: - Categorise between different power generation cycles; - Apply the appropriate analysis for the power generation cycle; - Analyse a vapour compression cycle, use appropriate ph charts; - Generate combustion equations and analysis of combustion of fuel in air, both on lean and on rich side. Main Text/s and any supplementary readings: - Eastop and McConkey, Applied Thermodynamics for Engineering Technologists. - Rogers & Mayhew, Engineering Thermodynamics Work and Heat Transfer. |
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| ADDITIONAL NOTES | Pre-requisite Study-unit: MEC1405 |
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| STUDY-UNIT TYPE | Lecture and Practical | ||||||||||||
| METHOD OF ASSESSMENT |
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| LECTURER/S | Anthony Theodore Saliba |
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The University makes every effort to ensure that the published Courses Plans, Programmes of Study and Study-Unit information are complete and up-to-date at the time of publication. The University reserves the right to make changes in case errors are detected after publication.
The availability of optional units may be subject to timetabling constraints. Units not attracting a sufficient number of registrations may be withdrawn without notice. It should be noted that all the information in the description above applies to study-units available during the academic year 2024/5. It may be subject to change in subsequent years. |
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