|Module code: MAB_19_A_4.02.WFL
4V+1LU (5 hours per week)|
|Mandatory course: yes
|Language of instruction:
Written exam 150 min.
MAB_19_A_4.02.WFL (P241-0290) Mechanical and Process Engineering, Bachelor, ASPO 01.10.2019
, semester 4, mandatory course
75 class hours (= 56.25 clock hours) over a 15-week period.
The total student study time is 150 hours (equivalent to 5 ECTS credits).
There are therefore 93.75 hours available for class preparation and follow-up work and exam preparation.
|Recommended prerequisites (modules):
MAB_19_A_1.04.MA1 Mathematics 1
MAB_19_A_1.07.ENB Engineering Basics
MAB_19_A_2.04.MA2 Mathematics 2
|Recommended as prerequisite for:
Prof. Dr. Marco Günther
Prof. Dr. Marco Günther (lecture)
Gerhard Braun (lecture)
After successfully completing this part of the course, students will:
- be able to explain the advanced basics of heat transport,
- be able to describe and characterize special heat transfer processes,
- be able to take and assess new, reactive approaches to heat transfer,
- be able to demonstrate and explain the application of convective heat transfer, thermal conduction and thermal radiation,
- be able to justify and evaluate their selection of technical equipment and components for heat transfer.
After successfully completing this part of the course, students will:
- be able to identify heat transfer mechanisms and select calculation methods,
- be able to determine process engineering and heat engineering quantities,
- be able to calculate heat transfer tasks,
- be able to show connections between special material data and dimensionless quantities
Heat Transfer (Professional skills):
After successful completion of the course, students will be proficient in the basics of thermodynamics in order to specifically describe the mechanisms of heat transfer. In the lecture, students will acquire the skills to handle empiric formulas based on material quantities, thermal process variables, thermal state variables and material-dependent property values.
Heat Transfer (Methodological skills):
By applying solution algorithms in a targeted manner, students will be able to reliably differentiate at which control variables a technical heat transfer process must be balanced or quantified and which optimization options (process engineering, mechanical engineering, fluid-mechanical or in material selection) are applicable using the available material data properties of pressure, temperature and volume specification.
Heat Transfer (Social competence):
Students will be able to discuss in small groups and develop solutions.
They will be able to define tasks independently, develop the knowledge they require based on the knowledge they have acquired, use suitable means of implementation.
Active exercise units during the lecture are designed to enable the students to competently evaluate stationary and quasi-stationary heat transfer problems in a communicative manner. These active practice units will deepen the learning and work techniques (professional heat transfer skills) previously acquired and promote skills for independently reviewing the knowledge received during their studies (also in small study groups). Students will be able to deepen this knowledge with the help of the interactive exercise units, exchange information in study groups about the basics of heat transfer, as well as methodical problem solving of learning and working techniques and confidently present their developments and findings.
Heat Transfer (Personal competence):
Students will be able to compare their results based on different approaches (purely empirical algorithms in the similarity theory of heat transfer based on dimensionless quantities), explain and calculate different approaches, discuss the likelihood of implementation based on their knowledge of the natural, technical or financial limits to which a process may be subjected. Students will be able to classify selection criteria for heat transfer analogys (intentional, e.g. sweating in functional clothing, or those that must be prevented, e.g. frost limit shifting in damp supporting masonry) for various technical applications and present their results using algorithms.
Students will be familiar with the basics of heat transfer mechanisms, thermal conduction, convection, radiation, evaporation and condensation. They will be able to solve heat transfer problems in technical fields. Students will be proficient in methodical procedures through sketches, balances, kinetics. They will be able to apply different approaches to heat transfer processes.
After successfully completing this module, students will:
- be familiar with and understand the calculation equations for heat exchangers and be able to design and recalculate heat exchangers,
- be familiar with and understand methods for the analysis of complex thermal processes and will be able to apply these methods.
Professional and methodological skills 60%, Social skills 15%, Personal competence 25%
After successfully completing this part of the course, students will learn the extended physical basics for the calculation of incompressible and especially compressible flows. Students will be familiar with the essential elements of a flow calculation and have some basic experience in operating calculation tool. Through exercises, students will be able to classify fluid dynamic processes and their effects, taking into account the influencing variables, and to calculate them from an engineering perspective.
Fourier´s laws of heat conduction, thermal conductivity of fluids and solids, heat transfer coefficient.
- Stationary tasks:
Heat transfer through flat, cylindrical and spherical walls (P»CLET number.)
- Quasi one-dimensional and quasi-stationary problems:
Cooling of flowing fluids in pipelines, cooling of a fluid in a spherical reservoir, cooling of a continuous wire in a liquid bath, fins (finned walls, finned tubes)
- Similarity Theory:
Dimensionless quantities (Nu, Re, Pr, Gr etc.)
- Heat transfer in single-phase flows:
Forced convection: channel flows, bodies in cross flow, tube bundles, Natural convection: plane wall, horizontal cylinder
- Simple heat exchangers:
Recuperators, regenerators: direct current, counter current, cross current
- Heat transfer by radiation:
PLANCK´s radiation law, LAMBERT´s cosine law, STEFAN-BOLTZMANN law, KIRCHHOFF´s laws, radiation heat exchange between parallel surfaces, radiation shields, radiative transfer of enclosed surfaces.
- Incompressible fluids:
Steady flow in piping systems, outflow processes, principle of linear momentum, principle of angular momentum
- Compressible fluids:
Energy equation, outflow processes, supersonic flow
Exemplary applications of CFD simulation software (like Ansys Fluent, Ansys CFX, Comsol Multiphysics)
Heat Transfer: Lecture: 1.5 hours per semester week, Tutorials: 0.5 hour per semester week,
"Fluid Mechanics": Lecture: 1.5 hours per semester week, Tutorials: 0.5 hour per semester week,
Lecture guide, handouts, exercises, formula collection
|Recommended or required reading:
v. Böckh, P.: Wärmeübertragung; Baehr, H.D., Stephan K.: Wärme- und Stoffübertragung
Elsner, N.; Dittmann A.: Grundlagen der Technischen Thermodynamik II, Wärmeübertragung, VDI Wärmeatlas
Rohsenow, W.M. et al.: Handbook of Heat Transfer Vol. I u. II
Bohl: Tech. Strömungslehre
v. Böckh: Fluidmechanik
Herwig: Strömungsmechanik A-Z
Kümmel: Technische Strömungsmechanik
Oertel, Böhle, Dohrmann: Strömungsmechanik