TRANSPORT PHENOMENA AT MACROSCOPIC LEVEL

TRANSPORT PHENOMENA AT MACROSCOPIC LEVEL

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iten
Code
72477
ACADEMIC YEAR
2019/2020
CREDITS
6 credits during the 2nd year of 10375 CHEMICAL AND PROCESSES ENGINEERING (L-9) GENOVA
SCIENTIFIC DISCIPLINARY SECTOR
ING-IND/24
LANGUAGE
Italian
TEACHING LOCATION
GENOVA (CHEMICAL AND PROCESSES ENGINEERING)
semester
2° Semester
modules
This unit is a module of:
Teaching materials

AIMS AND CONTENT

LEARNING OUTCOMES

The course will furnish the means of formulating and solving macroscopic balances of material and heat, developing problem solving skills and becoming familiar with the process analysis of chemical engineering systems.

AIMS AND LEARNING OUTCOMES

The attendance and active participation in the proposed training activities (frontal lessons, exercises and computer lab) and individual study will allow the student to:

-        correctly write the macroscopic balances of material and energy and discuss them using appropriate vocabulary;

-        apply the macroscopic balances of material (by mass and moles) and of enthalpy to single unit operations typical of chemical engineering;

-        identify possible simplifying assumptions in the framework of process problems which can be solved using material and energy macroscopic balances;

-        integrate the balances solution with the knowledge of thermodynamics acquired in the first module in terms of phase and reaction equilibrium;

-        calculate the diagram (flow rates, concentration, temperature) describing a process scheme with a number of unit operations;

-        evaluate from a macroscopic point of view the convective and diffusive fluxes in different control volumes;

-        use the main functions of the simulation software Aspen Plus for the balance solution.

 

Teaching methods

The module provides frontal lessons in the classroom. The presentation of theoretical contents (30 hours) are alternate by exercises (26 hours) carried out by the teacher on the board or by student teams and aimed at encouraging learning and the discussion of specific examples of process engineering applications. In addition, it is foreseen a computer lab (4 hours) with numerical exercises to be carried out in working groups using a commercial software. The frequency of lessons is recommended.

Transversal skills in terms of communication skills and independent judgment will be acquired through the teamwork, a test developed in the classroom by consulting technical handbooks and an exam test simulation.

SYLLABUS/CONTENT

The program of the module includes the presentation and discussion of the following topics: 

1.        Introduction (4 hours)

         Main chemico-physical variables, vocabulary, general balance formulation

2.        Macroscopic material balance (22 hours)

         Macroscopic material balance by mass and moles (complete and simplified formulation);

         steady-state and transient conditions, in open and closed systems;

         case studies with reactions where yield, kinetics or equilibrium are supposed;

         freedom degree calculation in process plants;

         strategy for the solution of process problems;

         use of technical handbook as data sourcing;

         material transport coefficient and Sherwood number;

         diffusive fluxes at the interface with phase equilibrium or reaction.

3.        Macroscopic balance of energy (16 hours)

Macroscopic balance of energy and its simplification to enthalpy balance;

         steady-state and transient conditions, in open and closed systems;

         case studies with reactions and relation to material balances;

         application to process plants;

         heat transport coefficient and Nusselt number;

         thermal resistances in series on flat and cylindrical geometry;

4.        Summary exercises (14 hours)

Case studies requiring the solution of both material and energy balances.

5.        Computer lab (4 hours)

         Basic knowledge for the use of the simulation software Aspen Plus;

solution with Aspen Plus of easy process problems based on macroscopic material and energy balances and related sensitivity analyses.

RECOMMENDED READING/BIBLIOGRAPHY

The teaching material used during the lessons will be available in the web classroom, as well as examples of final tests proposed in the previous years and a trace for their solution. The notes taken during the lessons and the material in the web classroom are sufficient for the preparation of the exam, but the following books are suggested as supporting and deepening texts:

- D.M. Himmelblau amd J.B. Riggs, Basic Principles and Calculations in Chemical Engineering, Prentice Hall Pearson Edication.

- M.C. Annesini, “Fenomeni di trasporto. Fondamenti e applicazioni”, Edizioni Hoepli.

- R. Mauri, Elementi di fenomeni di trasporto, Plus Pisa University Press.

- R.H. Perry, D.W. Green,“Perry’s chemical engineers’ handbook” VIII ed., Mc Graw Hill.

TEACHERS AND EXAM BOARD

Ricevimento: The professor is available by appointment agreed by email.

Exam Board

BARBARA BOSIO (President)

ELISABETTA ARATO (President)

LESSONS

Teaching methods

The module provides frontal lessons in the classroom. The presentation of theoretical contents (30 hours) are alternate by exercises (26 hours) carried out by the teacher on the board or by student teams and aimed at encouraging learning and the discussion of specific examples of process engineering applications. In addition, it is foreseen a computer lab (4 hours) with numerical exercises to be carried out in working groups using a commercial software. The frequency of lessons is recommended.

Transversal skills in terms of communication skills and independent judgment will be acquired through the teamwork, a test developed in the classroom by consulting technical handbooks and an exam test simulation.

LESSONS START

Second semester.

Class schedule available on the website of the Polytechnic School.

 

EXAMS

Exam description

The final test of the module consists in passing a written test for admission to the oral test. The written test consists of a problem to be solved in 2 hours and answering to one or more specific questions and an open question related to the result discussion. The necessary data can be provided in the text or to be found on technical handbooks made available by the teacher, while it is not allowed the consultation of any other text.

Students will find examples of tests proposed in previous years with the related trace for the solutions on the web classroom. Some exam examples are carried out in detail in the classroom and the teacher is available for explanation agreeing appointment.

The written test can be held either in previous appeals or in the same appeal in which student intends to take the oral exam. The written test has no expiry limits, it can be repeated, but in this way the grade which is considered valid is the one obtained on the last written exam.

To access the oral exam students must have passed the written test with a minimum grade of 16/30 and the final grade will be the average between written and oral exam. The oral test can be repeated maintaining the grade obtained for the written test.

The grade obtained in the teaching will be the average of the marks given in the two modules in which the teaching is divided. 

Three exam appeals for the ‘summer’ session will be available (June, July and September) and two appeals for the ‘winter’ session (January and February). The oral test can be held also during the teaching break provided by the Polytechnic School in Autumn and Spring. No extraordinary appeals will be granted outside the periods indicated by the polytechnic school, with the exception of students who have not included formative activities in the study plan current academic year.

 

Assessment methods

​The written test concerns a problem which requires the solution of macroscopic material and/or energy balances applied at interface, single unit operation or plant scheme. In addition to the ability to correctly formulate and solve the problem, the applied methodology, the discussion of the assumed hypotheses and the written quality of exposition will be evaluated.

The oral exam includes questions concerning all the contents proposed during the lessons, asked in terms of theoretical questions or application problems. The examination aims to assess the specific skills acquired and, in particular, the ability to apply them combined together to face concrete case studies. The quality of the exposition, the correct use of technical terminology and critical reasoning ability will be also assessed.

Exam schedule

Date Time Location Type Notes
14/02/2020 09:00 GENOVA Scritto Lo scritto di Principi 2 è stato spostato a venerdì 10 gennaio 2020 alle ore 9 presso l'aula G3A
24/02/2020 09:00 GENOVA Orale Gli orali dell'appello del 30/10/2019 si terranno in aula B3 ed inizieranno alle ore 8:00
26/03/2020 09:00 GENOVA Orale Gli orali dell'appello del 30/10/2019 si terranno in aula B3 ed inizieranno alle ore 8:00
15/06/2020 09:00 GENOVA Scritto Lo scritto di Principi 2 è stato spostato a venerdì 10 gennaio 2020 alle ore 9 presso l'aula G3A
19/06/2020 09:00 GENOVA Orale Gli orali dell'appello del 30/10/2019 si terranno in aula B3 ed inizieranno alle ore 8:00
13/07/2020 09:00 GENOVA Scritto Lo scritto di Principi 2 è stato spostato a venerdì 10 gennaio 2020 alle ore 9 presso l'aula G3A
17/07/2020 09:00 GENOVA Orale Gli orali dell'appello del 30/10/2019 si terranno in aula B3 ed inizieranno alle ore 8:00
14/09/2020 09:00 GENOVA Scritto Lo scritto di Principi 2 è stato spostato a venerdì 10 gennaio 2020 alle ore 9 presso l'aula G3A
18/09/2020 09:00 GENOVA Orale Gli orali dell'appello del 30/10/2019 si terranno in aula B3 ed inizieranno alle ore 8:00

FURTHER INFORMATION

For a successful learning, in addition to basic knowledge of mathematics, chemistry and physics, the knowledge of thermodynamics in ideal system provided in the first module is required, but no formal propaedeuticity is provided.