Heat and Mass Transfer
Bachelor degree course
Process Engineering, Environmental and Energy Process Engineering, Industrial Engineering for Chemical and Energy Engineering
Objectives of the module
Students understand the mechanisms of heat and mass transfer. On this base they can calculate heat and mass transfer coefficients for different fluids and equipment. Simple heat transfer processes can be interpreted with thermal characteristics, the multiplicity of geometric solutions is aware. The understanding of oppositeness of operating and investment costs and the economic interpretation is acquired . Simple evaporation processes can be interpreted with thermal characteristics at even predetermined heat . They learn stability criteria to be observed and applied . Students are able to calculate heat losses of equipment and buildings and judge the impact and the economics of thermal insulation measures. They can apply equilibrium equations on transport processes between liquid and gaseous phases and are thus able to participate in modules Thermal Process Technology and Reaction Process Machinery.
Content
- Types of Heat Transfer ( Basic equations for conduction, convection and radiation ) , warming of thermally thin bodies and fluids ( Newtonian capacity model )
- Heat transfer in multi-layer walls , heat resistance , impact of heat-isolation and ribs
- Convection , derivation Nusseltfunktion, laminar and turbulent boundary layers, suffused body (plate, ball, pipes) , flowed through the body ( pipes, ducts , hard beds ) , temperature-dependent material properties , impact currents (single nozzle, nozzle systems), free convection (boundary layers, nu functions for different geometries)
- Evaporation (mechanism Nu functions, stability of evaporator cooling operations), condensation (film theory, laminar and turbulent Nu functions)
- Recuperators (cocurrent, countercurrent and cross-flow), regenerators
- Types of diffusion (usually, non- equimolar, pore diffusion, Darcy, Knudsen ), mass transfer
- Stationary processes , diffusion through composite walls , catalysts , mass transfer between phases ( Henry ) , coupling of heat and mass transfer on the example evaporation
Teaching methods
Lecture, exercise
Requirements for participation
Technical Thermodynamics , Fluid Mechanics
Amount of work
- Attendance: 42 hours
- Self-study: 108 hours
Grading / examination / Credits
examination: 120min, 5 CP
Responsible
Prof. Dr.-Ing. E. Specht
Bibliography
- E. Specht: Wärme- und Stoffübertragung in der Thermoprozesstechnik, Vulkan-Verlag.
- Baer, Stephan: Wärme- und Stoffübertragung (Springer Verlag)
