ENROL NOW

Refrigerating Farm Produce

Course CodeBAG225
Fee CodeS2
Duration (approx)100 hours
QualificationStatement of Attainment

Learn how refrigeration works

  • Understand cooling and cool storage
  • Apply that knowledge to horticultural crops - vegetables, berries, fruits, flowers.

Lesson Structure

There are 8 lessons in this course:

  1. Nature & Scope of Refrigeration
    • Introduction
    • Nature of refrigeration
    • Why refrigerate?
    • Brief History of refrigeration
    • Scope of refrigeration
    • What things are refrigerated and what should not be?
    • Refrigeration Methods
    • Different types of refrigerators
  2. The Refrigeration Process
    • The Refrigeration Process
    • Underlying Principles
    • Definition of Work
    • The Second Law of Thermodynamics
    • The Gas Laws
    • The refrigeration cycle
  3. The Vapour Compression System
    • Refrigeration components in vapour compression systems
    • Compressor
    • Condenser
    • Liquid Receiver
    • Expansion Valve
    • Evaporator
    • Interconnecting pipework
    • Suction Line
    • Discharge Line
    • Liquid Drain Line
    • Liquid Line
    • Refrigerant composition
    • The domestic refrigerator
  4. Heat Load Calculations
    • Heat gain calculations
    • Fabric Heat Gains
    • Product Heat Gains
    • Air Change Heat Gains
    • Occupancy Heat Gains
    • Lighting Heat Gains
    • Mechanical/Electrical Heat Gains
  5. The Refrigeration Cycle: Refrigerants & Components
    • Refrigerant Selection
    • ASHRAE Standards
    • Boiling Point/Evaporating Point
    • Freezing Point
    • Toxicity and Flammability
    • Acute Toxicity Exposure Limit (ATEL)
    • Practical Limit (PL)
    • Global Warming Potential
    • Pressure enthalpy chart
    • Component selections
    • Evaporator Selection
    • Compressor Selection
    • Condenser Selection
    • Expansion Valve Selection
  6. Applied Refrigeration: Farm Produce
    • Fruit
    • General Requirements
    • Pre-treatment
    • Specific Examples
    • Vegetables
    • General Requirements
    • Pre-treatment
    • Specific Examples: Precooling
    • Specific Examples: Storage Life
    • Nuts AND Seeds
    • General Requirements
    • Specific Examples
    • Meat
    • General Requirements
    • Specific Examples
    • Fish
    • General Requirements
    • Specific Examples
    • Dairy
    • General Requirements
    • Specific Examples
  7. Applied Refrigeration: Other Products
    • Cut Flowers
    • General Requirements
    • Duration
    • Shelf Life
    • Post-Harvest Treatments
    • Conditioning for Market
    • Packaging
    • Specific Examples
    • Seed Storage Behaviour
    • Factors Affecting Storage of Seed
    • Types of Seed Storage
    • Cold and Cool Rooms in Seed Banks
    • Chemicals
    • Plant Growth Regulators
    • Storing Plant Growth Regulators
    • Auxins
    • Cytokinins
    • Gibberellins
    • Agricultural Chemicals
  8. Freezing Goods
    • Why Freeze Food?
    • Problems of Freezing
    • Other Frozen Agricultural Products
    • Commercial Freezing Methods
    • Methods
    • Commercial Freezing Equipment
    • Domestic Freezing
    • A few guidelines for freezing
    • Power Failure
    • Other General Considerations
    • Freezing fruits
    • Freezing vegetables
    • Freezing meat and poultry
    • Freezing meat, poultry and fish
    • How to Soften Water