HEAT TRANSFER

General Info

• Course Title: Heat Transfer
• Course Code: NAOME1232
• Semester: 5th
• Course Type: S.B.¹
• Weekly Teaching Hours: 4 (Lectures)
• Credits (ECTS): 4
• Offered to ERASMUS+ students: Yes
• Course Website: https://eclass.uniwa.gr/courses/NA213/
• Professors: D. Koubogiannis

Course Content / Syllabus

Lectures: Introduction to heat transfer, thermophysical properties of materials, heat conductivity, heat transfer modes. Conduction, Fourier’s law, thermal resistance, one-dimensional conduction in simple and composite-layer plane, cylindrical and spherical geometries, critical and optimum insulation thicknesses. Extended heat transfer surfaces, fins and their efficiency. Introduction to transient heat conduction. Convection, forced and natural. Hydraulically and thermally fully developed flow. Velocity and temperature boundary layer, laminar and turbulent flow, Reynolds, Prandtl and Nusselt numbers. Forced convection over plane, cylindrical and spherical geometries, in transverse flow around bundle of tubes, internal flow convection in ducts. Natural convection around bodies, Grashof number. Combined forced and natural convection. Radiation, black body, laws of Planck, Stefan-Boltzmann, Wien, Kirchoff, radiation properties of surfaces, coefficients of emission, absorption, reflection and permeability, grey body, radiation heat transfer, surface view coefficient. Conjugate heat transfer problems. Heat exchangers, classification. Calculation of geometry for given performance (sizing). Calculation of performance for given geometry (rating). Logarithmic Mean Temperature Difference (LMTD), NTU method.

Course Outline