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Secondary School Lesson Notes and Scheme of Work

SS1 First Term Air Conditioning And Refrigeration Lesson Note and Scheme of Work

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SS1 First Term Air Conditioning And Refrigeration Lesson Note and Scheme of Work


Week 1: Introduction to Air Conditioning and Refrigeration

Lesson Note:


Introduction to basic concepts of air conditioning and refrigeration.

Explanation of the importance of AC and refrigeration in various industries.

Overview of safety precautions and best practices in handling refrigerants.

Scheme of Work:


Lecture on the principles of refrigeration and air conditioning.

Demonstration of basic refrigeration cycles.

Group discussion on safety measures in handling refrigerants.

Week 2: Refrigeration Systems and Components

Lesson Note:


Understanding the components of refrigeration systems: compressor, condenser, evaporator, expansion valve.

Explaining the role of each component in the refrigeration cycle.

Introduction to different types of refrigerants.

Scheme of Work:


Practical session on identifying and understanding refrigeration system components.

Group activity: designing a basic refrigeration system.

Quiz on different types of refrigerants and their properties.

Week 3: Heat Transfer in Refrigeration Systems

Lesson Note:


Explanation of heat transfer processes: conduction, convection, and radiation.

Understanding the principles of heat exchange in refrigeration systems.

Overview of insulation materials and their importance in maintaining system efficiency.

Scheme of Work:


Practical demonstration of heat transfer processes using various materials.

Group project: designing an insulated enclosure for a refrigeration system.

Discussion on energy efficiency in refrigeration systems.

Week 4: Refrigeration Load Calculation

Lesson Note:


Introduction to refrigeration load calculation methods.

Understanding factors affecting refrigeration load: ambient temperature, product load, heat infiltration.

Calculation of refrigeration load for different applications.

Scheme of Work:


Hands-on practice: calculating refrigeration load for various scenarios.

Group exercise: analyzing refrigeration load requirements for different industries (e.g., food processing, pharmaceuticals).

Case study: calculating refrigeration load for a specific application.

Week 5: Refrigeration System Design

Lesson Note:


Overview of basic principles of refrigeration system design.

Explanation of system sizing, component selection, and layout considerations.

Introduction to schematics and diagrams used in refrigeration system design.

Scheme of Work:


Design project: designing a refrigeration system for a specific application (e.g., cold storage facility, supermarket).

Presentation of design proposals by student groups.

Peer review and feedback session on design proposals.

Week 6: Refrigeration System Installation and Commissioning

Lesson Note:


Understanding the installation process of refrigeration systems.

Overview of commissioning procedures and testing requirements.

Explanation of safety measures during installation and commissioning.

Scheme of Work:


Field trip to a refrigeration installation site.

Demonstration of installation techniques and safety procedures.

Hands-on session: commissioning a refrigeration system in a controlled environment.

Week 7: Refrigeration System Maintenance and Troubleshooting

Lesson Note:


Importance of regular maintenance for efficient operation of refrigeration systems.

Overview of preventive maintenance procedures.

Introduction to troubleshooting techniques for identifying and rectifying common issues.

Scheme of Work:


Practical session: conducting routine maintenance on refrigeration equipment.

Case studies: troubleshooting common refrigeration system problems.

Role-playing exercises: simulating maintenance scenarios and troubleshooting tasks.

Week 8: Air Conditioning Principles

Lesson Note:


Introduction to basic principles of air conditioning.

Understanding the psychrometric chart and its application in air conditioning processes.

Overview of different types of air conditioning systems.

Scheme of Work:


Lecture on psychrometrics and its relevance to air conditioning.

Hands-on activity: analyzing psychrometric properties of air using charts and calculators.

Group discussion: comparing various air conditioning systems and their suitability for different applications.

Week 9: Air Conditioning System Components

Lesson Note:


Explanation of components of air conditioning systems: compressor, condenser, evaporator, expansion valve, air handling unit.

Understanding the role of each component in the air conditioning process.

Introduction to ductwork and ventilation systems.

Scheme of Work:


Practical session: identifying and understanding components of air conditioning systems.

Group project: designing a ductwork layout for a building.

Presentation of ductwork designs and peer review.

Week 10: Air Distribution Systems and Control

Lesson Note:


Overview of air distribution systems: ductwork, grilles, diffusers.

Understanding the importance of proper airflow and ventilation in air conditioning systems.

Introduction to control systems and thermostats.

Scheme of Work:


Field trip to a building with HVAC systems.

Observation of air distribution systems and control mechanisms.

Group activity: designing a control system for an air conditioning unit.

Week 11: Revision Week



Review of key concepts and principles covered in previous weeks.

Practice quizzes and problem-solving exercises.

Peer-led study groups for focused review sessions.

Week 12: Examination Week



Written examination covering topics from the entire term.

Practical assessment: demonstration of skills in refrigeration and air conditioning systems design, maintenance, and troubleshooting.

Week 13: School Dismissal Week



Recap and reflection on the term’s lessons and activities.

Distribution of report cards and feedback on student performance.

Announcement of any additional resources or opportunities for further learning during the break.

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