Heat exchangers with or without phase transition and simultaneous heat and mass transfer

Objectifs

At the end of this module, the student will have understood and be able to explain (main concepts):

- the different types of heat exchangers, condenser, evaporators and other contactors carrying out both heat and mass transfer (cooling tower, humidification-dehumidification process,  air conditioning systems, drying equipments,..)

-  the mass and heat transfer mechanisms in these equipments

- the notion of efficiency

- film-wise and drop-wise condensation, the characteristics of the condensation of single or mixed  vapours with or without incondensable compounds

- the different mechanisms of boiling

- the concept of local coefficient and overall heat transfer coefficient

- the concept of simultaneous mass/heat transfer and their application to engineering especially for handling the system Air/Water/Steam

The student will be able to:

- select the adequate technology of the heat exchanger depending on the process requirement

- establish mass and energy balances on heat exchanger (continuous or batch, with or without phase change)

- establish simultaneous mass and energy balances

- design exchangers of all type: determine the local and overall transfer coefficient, evaluate its performance and its variation with a change of operating conditions

- use software such as ASPEN HTFS to design the heat exchanger

- design unit operations involving simultaneous transfers, such as cooling tower, dehumidification tower, air conditioners, dryers.

- provide basic elements useful for the design of furnaces

Pré-requis

Thermal transfers and reactors

Fluid properties and mass transfer

Thermodynamics

Évaluation

L’évaluation des acquis d’apprentissage est réalisée en continu tout le long du semestre. En fonction des enseignements, elle peut prendre différentes formes : examen écrit, oral, compte-rendu, rapport écrit, évaluation par les pairs…