TERM – 2ND TERM
WEEK EIGHT
Class: Senior Secondary School 2
Age: 16 years
Duration: 40 minutes of 5 periods each
Date:
Subject: AUTO MECHANICAL
Topic: COOLING SYSTEM COMPONENTS II
SPECIFIC OBJECTIVES: At the end of the lesson, pupils should be able to
I.) Identify the types of cooling system
II.) State the advantages of cooling system
III.) State the disadvantages of cooling system
INSTRUCTIONAL TECHNIQUES: Identification, explanation, questions and answers, demonstration, videos from source
INSTRUCTIONAL MATERIALS: Videos, loud speaker, textbook, pictures,
INSTRUCTIONAL PROCEDURES
PERIOD 1-2
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PRESENTATION
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TEACHER’S ACTIVITY
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STUDENT’S
ACTIVITY
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STEP 1
INTRODUCTION
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The teacher mention and describe the types of cooling system
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Students listens attentively to the teacher
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STEP 2
EXPLANATION
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Teacher discusses the advantages and disadvantages of cooling system
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Students exhibit attentiveness and active engagement
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STEP 3
NOTE TAKING
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The teacher writes a summarized
note on the board
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The students
copy the note in
their books
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NOTE
COOLING SYSTEM COMPONENTS II
Types of cooling system
- Liquid Cooling System: Liquid cooling systems use a coolant (usually a mixture of water and antifreeze) to absorb heat from the engine or equipment. The coolant circulates through the engine, absorbing heat, and then passes through a radiator where the heat is dissipated to the surrounding air.
- Air Cooling System: Air cooling systems use airflow to dissipate heat from the engine or equipment. Heat sinks, fins, or other heat-dissipating components are used to increase the surface area available for heat transfer. Fans or natural convection then move air over these surfaces, carrying away heat and reducing the temperature.
Advantages of cooling system
- Cooling systems prevent engines, machinery, electronics, and other equipment from overheating, ensuring they operate within safe temperature limits.
- By maintaining optimal operating temperatures, cooling systems improve the performance and efficiency of engines and machinery, leading to better overall productivity.
- Cooling systems reduce friction and heat-related wear on components, extending their lifespan and reducing maintenance costs.
- Cooler operating temperatures improve energy efficiency by reducing energy losses due to friction and heat, leading to lower fuel consumption and operating costs.
- Cooling systems help prevent accidents and malfunctions by maintaining safe operating temperatures in critical applications such as automotive engines and industrial machinery.
Disadvantages
- Cooling systems can be complex and require regular maintenance and monitoring to ensure proper operation. Failure to maintain cooling systems can lead to malfunctions and costly repairs.
- Cooling systems consume energy to operate, which can contribute to overall energy consumption and operating costs, especially in large-scale industrial applications.
- Some cooling systems use refrigerants or other substances that can have environmental impacts, such as ozone depletion or greenhouse gas emissions.
- Cooling systems can fail due to various factors such as leaks, blockages, or component malfunctions, leading to equipment downtime and potential damage.
EVALUATION: 1. Identify the two types of cooling system and describe them
- Mention 4 advantages of cooling system
- Mention 3 disadvantages of cooling system
CLASSWORK: As in evaluation
CONCLUSION: The teacher commends the students positively
