Course CodeBAG225Fee CodeS2Duration (approx)100 hoursQualificationTo obtain formal documentation the optional exam(s) must be completed which will incur an additional fee of £30. Alternatively, a letter of completion may be requested. 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: 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 The Refrigeration Process The Refrigeration Process Underlying Principles Definition of Work The Second Law of Thermodynamics The Gas Laws The refrigeration cycle 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 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 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 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 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 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