Introduction to Heat Transfer

Formation ECAM LaSalle Ingénieur spécialité Mécanique et Génie Electrique (ENGINEERING PROGRAM)

General Data
Academic program	Formation ECAM LaSalle Ingénieur spécialité Mécanique et Génie Electrique (ENGINEERING PROGRAM)			:
Type d'EC	Classes (LIIEEng05EIntroHeatTransf)
Lectures : 12h00 Tutorials : 12h00 Lab Work : 8h00 Total duration : 56h00	Status :	Period : Semester 5	Education language : English

Learning Outcomes
1. Identify the different modes of heat transfer (conduction, convection, radiation) taking place in a thermal system. 2. Apply the physical laws governing the heat transfer in a multi-mode heat transfer system. 3. Solve the heat conduction equation for steady state and transient problems. 4. Use steady state conduction existing solution to study realistic engineering problems. 5. Use empirical relations to study thermal/fluid systems. 6. Identify the specific nature of thermal radiation and the radiative interactions at a real surface.

Learning Outcomes

1. Identify the different modes of heat transfer (conduction, convection, radiation) taking place in a thermal system.
2. Apply the physical laws governing the heat transfer in a multi-mode heat transfer system.
3. Solve the heat conduction equation for steady state and transient problems.
4. Use steady state conduction existing solution to study realistic engineering problems.
5. Use empirical relations to study thermal/fluid systems.
6. Identify the specific nature of thermal radiation and the radiative interactions at a real surface.

Content
• General introduction : fundamentals of heat transfer, heat transfer mechanisms, relationship to thermodynamics. • Fundamentals of conduction : Heat conduction equation, Fourier's law, one-dimensional heat conduction equation solutions with/without heat generation, variable thermal conductivity, boundary and initial conditions. • Steady heat conduction : heat conduction in plane walls, cylinder wall and spherical shell, thermal resistance concept, generalized thermal resistance network, thermal contact, critical radius of insulation, heat transfer from finned surfaces. • Fundamentals of convection : physical mechanisms, hydrodynamic/thermal boundary layer equations, Nusselt and Prandtl numbers, boundary layer similarity, Reynolds analogy. • External forced convection : laminar and turbulent flow, heat transfer correlations for the parallel flow over flat plates and the flow over cylinders and spheres, flow across tube banks. • Internal forced convection : laminar and turbulent flow in tube, thermal entry length, general thermal analysis, log mean temperature difference, heat transfer correlations for circular/non-circular tubes. • Introduction to radiation: spectral and directional distribution, solid angle, blackbody radiation, Stefan-Boltzmann law, emission from real surfaces, radiative properties (emissivity, absorptivity, transmittivity, reflectivity), Kirchoff's laws.

Content

• General introduction : fundamentals of heat transfer, heat transfer mechanisms, relationship to thermodynamics.
• Fundamentals of conduction : Heat conduction equation, Fourier's law, one-dimensional heat conduction equation solutions with/without heat generation, variable thermal conductivity, boundary and initial conditions.
• Steady heat conduction : heat conduction in plane walls, cylinder wall and spherical shell, thermal resistance concept, generalized thermal resistance network, thermal contact, critical radius of insulation, heat transfer from finned surfaces.
• Fundamentals of convection : physical mechanisms, hydrodynamic/thermal boundary layer equations, Nusselt and Prandtl numbers, boundary layer similarity, Reynolds analogy.
• External forced convection : laminar and turbulent flow, heat transfer correlations for the parallel flow over flat plates and the flow over cylinders and spheres, flow across tube banks.
• Internal forced convection : laminar and turbulent flow in tube, thermal entry length, general thermal analysis, log mean temperature difference, heat transfer correlations for circular/non-circular tubes.
• Introduction to radiation: spectral and directional distribution, solid angle, blackbody radiation, Stefan-Boltzmann law, emission from real surfaces, radiative properties (emissivity, absorptivity, transmittivity, reflectivity), Kirchoff's laws.

Pre-requisites / co-requisites
Thermodynamics, Fluid Mechanics

Bibliography
Çengel, Y et al. (2019), “Heat and Mass Transfer: Fundamentals and Applications”, 6th Edn., McGraw Hill Higher Education. Incropera, F.P. et al. (2017), “Incropera's Principles of Heat and Transfer”, Global Edn., John Wiley & Sons.

Assessment(s)
N°	Nature	Coefficient	Observable objectives
1	Laboratory work: Practical insight through lab benchwork applications (linear heat conduction, forced convection over a flat plate, heat transfer from a fin)	25	1, 2, 4, 5
2	Midterm exam of 90 mins: Fundamentals of heat transfer, heat conduction equation, steady heat conduction (thermal resistance network), heat tranfer from finned surfaces	30	1 - 4
3	Final exam of 2 hours: Heat tranfer from finned surfaces, fundamentals of convection, external and internal forced convection, radiation properties and processes	45	1 - 6
4		Written exam