ANNEXURE VI Nirma University Institute of Technology Chemical Engineering Department Course Policy B.Tech. Semester: III Academic Year: 207 Course Code & Name : CH02 Heat Transfer Operations Credit Details : L T P C 2 5 Course Co-ordinar : Dr. Femina Patel Contact No. & Email : 079064252, femina.patel@nirmauni.ac.in Office : PG-07 Visiting Hours : Monday & Tuesday: :0 p.m. 2:00 p.m. Odd Saturdays: 2:00 p.m. 4:00 p.m. Course Blog : https://2ch204ns20.wordpress.com/ Course Faculty : Dr. Femina Patel Contact No. & Email : 079064252, femina.patel@nirmauni.ac.in Office : PG-07 Visiting Hours : Monday & Tuesday: :0 p.m. 2:00 p.m. Odd Saturdays: 2:00 p.m. 4:00 p.m. Course Blog : https://2ch204ns20.wordpress.com/
. Introduction Course. Importance of Course: Heat transfer is a subject of widespread interest the students of engineering, practicing engineers and technicians engaged in the design, construction, testing and operation of many diverse forms of heat exchange equipment require in our scientific and industrial technology..2 Course objectives: To understand the fundamentals of heat transfer mechanisms in fluids and solids and their applications in various heat transfer equipment in process industries.. Pre-requisite: Mathematics: Taylor s series expansions, solution of simple ODEs and PDEs, simple integration and differentiation, integration by parts, and trigonometric and hyperbolic functions 2. Course Learning Outcomes After successful completion of the course, student will be able. understand the basic concepts and laws of different modes of heat transfer, 2. apply knowledge of heat transfer in heat exchange equipments,. analyze heat transfer with/without phase change, 4. evaluate thermal performance of heat exchange equipments.. Syllabus Teaching Hours: 45 Unit : Introduction heat transfer Hours: 06 Its relation with thermodynamics and three modes of heat transfer. Prime laws for each mode. General laws of heat transfer. Analogies with other transport processes and electricity. Unit 2: Heat conduction Hours: 09 Steady State one dimensional conduction, Heat transfer by conduction through plane & composite wall, cylinder & spheres. Insulating materials- concept of critical radius of insulation for cylinders & sphere. Extended surfaces and temperature distribution for extended surfaces under various conditions and effectiveness of fins. Introduction unsteady state heat conduction. Unit : Convection Hours: 09 Mechanism of convection, Types of convection- natural and forced, Determination of convective heat transfer coefficient by different methods, Forced & Natural convectionin laminar and turbulent flow over different bodies, Significance of dimensionless numbers.
Unit 4: Thermal radiation Hours: 04 Introduction and developed theories of radiation. Different laws of Radiation, Concept of Black body and related aspects, Radiation transfer between surfaces, Radiation shields, Radiation through semi-transparent materials. Unit 5: Heat transfer with phase change Hours: 0 Boiling of liquids, mechanism of boiling, nucleate boiling, and film boiling, Condensation of vapors, Film wise and drop wise condensation. Unit 6: Evaporation Hours: 0 Introduction, performance of an evaporar, individual and overall heat transfer coefficients, capacity and economy of evaporars, Single & multiple effect evaporars, Concept of boiling point elevation, Duhring's rule, and effect of liquid head & friction on pressure drop, Types and application of evaporars. Unit 7: Heat exchange equipments Hours: Introduction and types of heat exchange equipments, Individual and overall coefficient, LMTD, Variable overall heat transfer coefficients, Fouling facrs, LMTD correction facrs, General constructions of shell and tube heat exchangers, NTU & Heat exchange equipment effectiveness.. Self-study The self-study contents of the syllabus are declared at the commencement of semester. Around 0% of the questions will be asked from self-study contents. Topics/content for self-study are as listed below: General heat conduction equation in Cylindrical Coordinates/Spherical Coordinates Heat Dissipation from a fin losing heat at the tip Derive the relationship between the effectiveness and number of transfer units for a parallel flow heat exchanger Selection of heat exchange equipment Students are expected study above mentioned pics on their own. These pics will not be taught in the classroom. Students should refer books available in the library for the same..2 References. Dr. D. S. Kumar, Heat & Mass Transfer, S. K. Kataria & Sons. 2. Er. R. K. Rajput, Heat and Mass Transfer (SI units), S. Chand & Company Pvt. Ltd.. Mahesh M. Rathore, Engineering Heat and Mass Transfer (Third Edition, University Science Press, Laxmi Publications (P) Ltd. 4. Yunus A. Cengel, Heat Transfer: A Practical Approach, Second Edition in S.I. units, Tata Mcraw-Hill Edition.
5. Yunus A. Cengel and Afshin J. Ghajar, Heat and Mass Transfer: Fundamentals & Applications, McGraw Hill Education. 6. Gupta and Prakash, Engineering Heat Transfer, Nemchand & Bros., Roorkee. 7. K. A. Gavhane, Unit Operation II (Heat & Mass Transfer), Revised Edition, Nirali Prakashan. 8. Warren L. McCabe, Julian C. Smith, Peter Harriott, Unit Operations of Chemical Engineering, McGraw Hill Publication. 9. Y. V. C. Rao, Heat Transfer, University Press Circulation. 0. Binay K Dutta, Heat Transfer: Principles and Applications, PHI Learning Pvt. Ltd.. P. S. Ghoshdastidar, Heat Transfer, Oxford University Press. 2. S. P. Sukhatme, A Text Book on Heat Transfer, Universities Press. Laborary details Laborary experiments/ exercises should be completed as per the given schedule. It is expected that a student does the same with full understanding of the concept, procedure and application involved. Laborary work will be based on above syllabus with following 2 experiments and 2 Virtual laborary experiments be performed. Sr. No. Week No. # List of Experiments Mapped CLOs Week Introduction Heat Transfer, Briefing about list of -- experiments with objectives, Assessment policy for experiments 2 Week 2 Thermal conductivity apparatus Week Thermal conductivity of metal rod 4 Week 4 Thermal conductivity of insulating powder 5 Week 5 Heat Transfer in natural convection 6 Week 7 Heat Transfer in forced convection 7 Week 8 Extended surface equipment 8 Week 9 Parallel flow heat exchanger 2 & 4 9 Week 0 Counter flow heat exchanger 2 & 4 0 Week 2 Shell and Tube heat exchanger 2 & 4 Week Emissivity measurement apparatus 2 Week 4 Drop wise and film wise condensation apparatus Week 5 Finned tube heat exchanger 2 4 Week 6 Virtual Lab Experiment: Conduction analysis of double material slab Refer link: http://iitg.vlab.co.in/index.php?sub=62&brch=76& sim=52&cnt= 5 Week 7 Virtual Lab Experiment: Conduction analysis of double material sphere Refer link: http://iitg.vlab.co.in/index.php?sub=62&brch=76& sim=5&cnt=
5. Turial details Students are advised get their doubts cleared in turial sessions. Turial work will be based on the syllabus with following 2 turials be conducted. Sr. No. Turial Topic Schedule * Mapped CLO Introduction Heat Transfer, Briefing about 0/07/207 -- turials, Assessment Policy for turials 4/07/207 2 Fundamentals of Heat Transfer 7/07/207 2/07/207 Heat Transfer by Conduction (Steady State): Conduction through a Plane wall and Composite wall 4 Heat Transfer by Conduction (Steady State): Conduction through Composite wall 5 Heat Transfer by Conduction (Steady State): Conduction through Cylindrical Wall and Multilayer Cylindrical Wall 6 Heat Transfer by Conduction (Steady State): Conduction through a Sphere, Effect of Variable Thermal Conductivity, Critical Thickness of Insulation 7 Heat Transfer by Conduction (Steady State): Critical Thickness of Insulation and Extended Surface 8 Convection: Rayleigh and Buckingham π-theorem methods 24/07/207 28/07/207 /07/207 4/08/207 7/08/207 /08/207 2/08/207 25/08/207 28/08/207 /09/207 4/09/207 8/09/207 9 Convection: Correlations for free convection /09/207 5/09/207 0 Convection: Correlations for forced convection in laminar and turbulent flow Radiation: Absorptivity, Transmissivity and Reflectivity, Plank s distribution law, Total emissive power: Stefan-Boltzmann law, Wein s displacement law 2 Heat Exchanger: Overall heat transfer coefficient, Logarithmic Mean Temperature Difference (LMTD) Heat Exchanger: LMTD correction facrs, Heat Exchanger effectiveness and Number of Transfer Unit (NTU) * Schedule is based on academic calendar 25/09/207 To 29/09/207 0/0/207 //207 6//207 0//207 //207 7//207 2 & 4 2 & 4
6. Assessment Policy 6. Component wise Continuous Evaluation (CE), Laborary and Project Work (LPW) & Semester End Examination (SEE) weightage Assessment scheme Component weightage Class Test 0% (0 marks) CE LPW SEE 0.4 0.2 0.4 Sessional Turial Continuous Viva Voce Exam Evaluation Evaluation 25% 40% 0% 75% 00 marks (40 marks) (0 marks) 00 marks 00 marks 6.2 Assessment Policy for Continuous Evaluation (CE) Assessment of Continuous Evaluation comprises of three components.. Class Test will be conducted as per academic calendar. It will be conducted online/ offline for the duration of hour and will be of 0 marks. 2. Sessional Exam will be conducted as per academic calendar. It will be conducted offline for the duration of hour and 5 minutes and will be of 40 marks.. There will be 2 turials each carrying weightage of 0 marks. At the end of the course tal marks obtained out of 20 will be converted according weightage assigned. Assessment of Turials will be carried out based on parameters like timely submission, neat and clean work, originality, involvement of the student, regularity, discipline etc. during the session. 6. Assessment Policy for Laborary and Project Work (LPW) Assessment of Laborary and Project Work comprises of two components.. Continuous assessment for laborary experiments will be conducted. There will be 2 experiments, each carrying weightage of 0 marks. At the end of the course tal marks obtained out of 20 will be converted according weightage assigned. Assessment of Experiment will be carried out based on parameters like Completion of lab work file, understanding of the experiment performed, originality, involvement of the student, regularity, discipline etc. during the session. 2. A Viva voce examination for LPW component will be conducted as per academic calendar. It will carry a weightage of 25 marks. 6.4 Assessment Policy for Semester End Examination (SEE) A written examination of hour duration will be conducted for the course as per academic calendar. It will carry 00 marks and marks obtained out of 00 will be converted as per weightage assigned.
7. Lesson Plan Session No. Topics Mapped CLO Overview of the course, Discussion on Course Policy, Course Website and Blog, Importance of the course, Evaluation, Linkages of the course with other course/ s and Professional relevance -- 2, Fundamentals of Heat Transfer: Introduction, Thermodynamics, Heat transfer, Difference between thermodynamics and heat transfer, Areas and applications of heat transfer, Heat transfer problems 4, 5, 6 Fundamentals of Heat Transfer: Modes of heat transfer: Conduction; Convection; Radiation, Variation in transfer of heat due time, Fourier s law, Newn s (Newn- Rikhman) law, Stefan Boltzmann law, Thermal conductance and resistance, Convective and radiative conductance, Combined heat transfer process, Analogies between various transport processes, Analogy between flow of heat and Electricity 7, 8 Heat Transfer by Conduction (Steady State): Concept of heat conduction, thermal conductivity, general heat conduction equation in Cartesian Coordinates/Cylindrical Coordinates/ Spherical Coordinates, Thermal diffusivity 9, 0 Heat Conduction through Plane and Composite walls: Heat conduction through a plane wall, Heat conduction through a composite wall, The overall heat transfer coefficient Heat Conduction through Hollow and Composite Cylinder 2 Heat Conduction through Hollow and Composite Sphere Critical Thickness of Insulation 4, 5 Heat Transfer From Extended Surfaces (Fins): Introduction, Heat flow through Rectangular Fin : Heat dissipation from an infinitely long fin, Heat dissipation from a fin insulated at the tip, Heat dissipation from a fin losing heat at the tip, Efficiency and Effectiveness of fin 6 Convection: Free and Force Convection; Laminar and Turbulent flow, Newn-Rikhman law: convection rate equation 7, 8 Nusselt Number, Determination of Nusselt Number 9 Dimensional analysis and its application: Rayleigh method, Buckingham PI-theorem, Significance of Dimensional Groups 20, 2 Free convection: Dimensional analysis applied free convection, Empirical equations for free convections based on experimental results 22, 2 Forced Convection: Dimensional analysis applied forced convection, Correlations for forced convection in laminar flow, Correlations for forced convection in turbulent flow
24 Hydrodynamic and thermal boundary layer over flat plate, Thickness of thermal boundary layer, Local and average heat transfer coefficients in forced convection, 25, 26, 27, 28 Thermal Radiation: Nature of thermal radiation, Spectrum of electromagnetic radiation, Absorption, Transmission, Reflection and Emission of radiation, Monochromatic emissive power of black body: Plank s distribution law, Total emissive power: Stefan-Boltzmann law, Emissivity, Kirchoff s law, Black body, Wein s displacement law, Radiation shield, Radiation transfer between surfaces, Radiation through semi-transparent materials 29, 0, Heat Transfer with change of phase: Heat transfer accompanied by change of phase, Phenomenon of boiling, Regimes of pool boiling, Phenomena of condensation, Film wise and drop wise condensation 2, Heat exchange equipment: Introduction, Heat Exchanger 2 Types 4, 5 Overall heat transfer coefficient, Effect of scale formation 2 & 4 (Fouling facrs) 6, 7 Logarithmic Mean Temperature Difference (LMTD) 2 & 4 8 LMTD correction facrs 2 & 4 9, 40 Heat Exchanger effectiveness and Number of Transfer Unit 2 & 4 (NTU) 4, 42, 4, Evaporar: Introduction, Types and applications of 2 Evaporars, Methods of feeding of evaporar, Performance of evaporar (Capacity and Economy), Concept of boiling point elevation, Duhring's rule 44 Selection of heat exchange equipment, Advances in heat exchange equipment 45 Review of the course, Feedback related the course, Linkages with advanced course/s in succeeding years 8. Mapping of Session Learning Outcomes (SLO) with Course Learning Outcomes (CLO) Session No. Session Learning Outcomes: After completion of the session, student will be able Mapped CLO Understand importance, scope and policy of the course -- 2, State the fundamental difference between thermodynamics and heat transfer Appreciate the importance of heat transfer in various filed of engineering 4, 5, 6 Understand the different modes of heat transfer Bring out the difference between steady and unsteady; one, two and three dimensional heat flows Identify the different modes of heat transfer in a given system operations Understand the Fourier s law, Newn s law and Stefan- Boltzmann law Define thermal resistance 2 --
Appreciate the analogies between various transport processes and also between flow of heat and electricity 7, 8 Understand the salient features of Fourier s law of heat conduction Define thermal conductivity Appreciate the variation in thermal conductivity for different materials and under different conditions Set up general heat conduction equation in Cartesian, cylindrical and spherical co-ordinates Specify homogeneous and isotropic material and define thermal diffusivity of a material 9, 0 Analyze the steady state one-dimensional heat conduction for temperature distribution and rates of heat transfer through a plane wall and a composite wall in which thermal resistance are connected in series as well as in parallel Explain the heat conduction through a wall separating two fluids and the concepts of overall heat transfer coefficient Analyze the steady state one-dimensional heat conduction for temperature distribution and rates of heat transfer through a hollow cylinder and a composite cylinder Explain the heat conduction through a cylinder separating two fluids and the concepts of overall heat transfer coefficient 2 Analyze the steady state one-dimensional heat conduction for temperature distribution and rates of heat transfer through a spherical shell and a composite sphere Explain the heat conduction through a sphere separating two fluids and the concepts of overall heat transfer coefficient Appreciate the dependence of heat loss on thickness of insulation Define critical thickness of insulation Set up expression for critical radius of insulation for a cylinder and a sphere 4, 5 Understand finned surfaces, their configuration and common applications Understand steady flow of heat along a rod Understand heat dissipation from (i) an infinitely long fin (ii) a fin losing heat at the tip (iii) a fin insulated at the tip Understand performance parameters: efficiency and effectiveness of fin 6 Understand free and forced convection Write the convective heat rate equation and define the convective heat transfer coefficient
7, 8 Understand the concept of hydrodynamic and thermal boundary layers Define Nusselt number, state its physical significance and list the methods used for its estimation 9 Understand the system of dimensions and dimensional homogeneity Specify the different variables affecting the mechanisms of free convection and forced convection 20, 2 Perform dimensional analysis for free convection Define and differentiate between Bulk temperature and mean temperature Local and average convective coefficient Know about the various correlations for free convection depending on nature of flow, geometrical configuration and its orientation 22, 2 Perform dimensional analysis for force convection Know about the various correlations for forced convection depending on nature of flow, geometrical configuration and its orientation Discuss the physical significance of dimensionless groups 24 Establish the relationship between thermal and hydrodynamic boundary layer thickness Define the local friction coefficients for local and average values of heat transfer coefficients for thermal boundary layer Workout the correlations for local and average values of 25, 26, 27, 28 heat transfer coefficients for thermal boundary layer Understand the concepts of salient features and characteristics of radiation Understand the concepts absorptivity, reflectivity and transmissivity Understand the concepts of wavelength distribution of black body radiation; Plank s law Understand the concepts of tal emissive power; Stefan Boltzman law and Wien s displacement law Understand the concepts of Kirchoff s law; emissivity 29, 0, Define and make distinction between film condensation and drop-wise condensation Understand different regimes of boiling heat transfer and comment on critical heat flux in nucleate boiling 2, Understand and comment upon the utility and schematic of different types of heat exchangers 4, 5 Understand and comment upon fouling facr and overall heat transfer coefficient for heat exchangers 6, 7 Understand and comment upon logarithmic mean temperature difference (LMTD) for parallel flow and counter flow heat exchangers 8 Understand and comment upon correlation facrs LMTD of heat exchangers with different configuration 2 2 & 4 2 & 4 2 & 4
9, 40 Understand and comment upon heat exchanger effectiveness and number of transfer units 4, 42, 4, Understand and comment upon the schematic of different types of evaporars Appreciate the importance of evaporars Understand the methods of feeding of evaporar Evaluate the performance of evaporars 44 Comment upon selection of heat exchange equipment Appreciate the advances in heat exchange equipment 45 Summarize pics covered in the course and express the linkages with other course/ s 2 & 4 2 2 -- 9. Teaching-learning methodology:. Lectures: Primarily Chalk and Black board will be used conduct the course. However, where required, Power Point Presentations (PPTs), Video Lectures, Simulations / Animations etc. will be used enhance the teaching-learning process. 2. Turial: Emphasis will be on one one interaction with students for clearing their doubts and problem solving.. Laborary: Explanation of Experiment be performed along with co-relation with theory will be given. At the end of each session assessment will be carried out based on parameters like completion of lab work that includes observations, calculations, graphs and conclusions, individuality and involvement of the student, regularity, discipline etc. Students will be quizzed check their understanding of the experiment/exercise conducted. 0. Active learning techniques Active learning is a method of learning in which students are actively or experientially involved in the learning process. Following active learning techniques will be adopted for the course. Flipped Class-room Topics: Heat Exchangers and its Applications Types of Evaporars Muddiest Points Convection: Rayleigh and Buckingham π-theorem methods. Course Materials Following course material is uploaded on the course website: https://2ch204ns20.wordpress.com/ Course Policy Lecture Notes and PPTs,
Books / Reference Books / NPTEL video lectures Turials, Lab Manuals and details of Virtual lab experiments Question bank Web-links, Blogs, Video Lectures, Journals Animations, Softwares 2. Course Learning Outcome Attainment Following means will be used assess attainment of course learning outcomes. Use of formal evaluation components of continuous evaluation, turials, laborary work, semester end examination Informal feedback during course conduction. Academic Integrity Statement Students are expected carry out assigned work under Continuous Evaluation (CE) component and LPW component independently. Copying in any form is not acceptable and will invite strict disciplinary action. Evaluation of corresponding component will be affected proportionately in such cases. Turnitin software will be used check plagiarism wherever applicable. Academic integrity is expected from students in all components of course assessment.