But du cours
- Understand the concepts of sizing refrigeration systems dedicated to food preservation and traceability monitoring;
- Understand and characterize air treatment issues;
- Evaluate selection criteria for coupled pumps and deduce potential energy efficiency in variable-flow models;
- Acquire basic knowledge of transport phenomena (thermal, mass, momentum, etc.) occurring during unit operations and treatment processes (preservation, transformation, etc.) to understand their operation;
- Understand and master fluid transfer sizing tools in the Agri-Food sector: viscous fluids, rheology, compressible fluids;
- Know and choose different pumps and compressors used in the agri-food industry.
Acquis d'apprentissage visés
This course aims to enable the future agro-industrial engineer to:
- Establish a production flowchart;
- Select and size equipment based on the target finished product;
- Conduct a test and verify the proper operation of the production line.
Prérequis
- Thermodynamics (First and Second Laws).
- Introduction to fluid mechanics.
- Basic understanding of psychrometric chart evolutions.
Programme
- Motor and receiver cycles
- Refrigeration and freezing (refrigeration machines and freezing/thawing rates)
- Psychrometric chart (Psychrometry)
- Mass transfer: diffusion (definition of concentration units, steady-state mass transfer (Fick’s 1st law), transient mass transfer (Fick’s 2nd law), diffusion in the transient regime, applications of mass transfer in food processes)
- Mass transfer by convection (dimensionless numbers, calculation of mass transfer coefficients)
- Study of simultaneous transfer phenomena (heat and mass).
- Fluid transfer (internal flow in pipes, external flow, boundary layer analysis, velocity profiles, study of forces acting on fluids, pressure drops, friction).
- Practical work (refrigeration machines, industrial site visit (as a complement to practical work carried out))
Modalités d'évaluation
- Continuous assessments and practical work grade.
- Case study on refrigeration machines.
- Case study on air treatment.
- Number of assessments: 3; 2 hours per continuous assessment; Final grade = 1/3 CA + 1/3 homework + 1/3 practical work (+ report).
Bibliographie
- IEC 60034-30 standard for electric motors with 4 efficiency classes.
- Techniques de l'Ingénieur collection:
- Fluid mechanics
- Techniques de l'Ingénieur collection - Ref: A1870 v1
Supports
Materials provided by the instructors involved in this module. Handouts/resources on refrigeration and air treatment systems (actual sizes used in the field) made available to students.