411-305 Heat Transfer 1

Credit Points

Coordinator

Prerequisites

421-205 Mathematics for Engineers 2.2, 411-205 Fluid Mechanics 1 and 411-302 Transport Phenomena 2

Corequisites

None

Semester

Contact

Subject Description

The objective of this unit is to present an elementary treatment of the principles of heat transfer and their application in chemical engineering. The topics covered include:

Convection: Use of heat transfer correlations to predict coefficients. Concept of an overall heat transfer coefficient, fouling factors. Determination of the area required for a given heat duty. Free convection: Discussion and application of Grashof Number and other dimensionless groups.

Basics of condensation and boiling. Evaporation: Various evaporator types and their advantages and disadvantages (forced circulation, film types). Multiple and single effects; backward and forward feed; boiling point elevation; apparent and actual heat transfer coefficients; thermal and mechanical recompression. Evaporator energy balance.

Radiation: Basic principles of radiation. Shape factors (viewfactors). Radiation between grey surfaces in the network approach. Applications of networks for various situations.

Conduction: Fourier Law of heat conduction. Steady-state heat conduction and the Laplace equation. Steady-state conduction with distributed heat source and the Poisson equation. Simplified equation for steady-state heat conduction. Transient heat conduction and the diffusion equation. Examples of simple solution of transient heat conduction. Brief introduction to numerical methods for heat conduction problems.

Assessment

One examination not exceeding three-hours at the end of semester two