How Vapor Compression Refrigeration System Works - Parts & Function Explained.

Introduction to Vapour Compression Refrigeration System

Overview of Refrigeration

• Refrigeration is defined as the process of lowering temperature by removing unwanted heat from a selected object or space and transferring it elsewhere.

Understanding Vapour Compression

• The vapour compression refrigeration system involves compressing a vapor refrigerant to achieve cooling. A compressor is essential for this process.

Key Components of the System

• The main components include:

• Compressor: Compresses the vapor refrigerant.

• Condenser: Cools and condenses the vapor into liquid.

• Expansion Valve: Reduces pressure, allowing for cooling.

• Evaporator: Absorbs heat, providing the cooling effect.

These components are interconnected through pipes forming a closed-loop system.

Detailed Working Procedure

Functionality of Each Component

• The evaporator is where actual cooling occurs; it absorbs heat from its surroundings, causing the refrigerant to cool down.

Compressor Operation

• The compressor pressurizes the vapor refrigerant, increasing its temperature before sending it to the condenser. Ammonia or freon is typically used as a heat-carrying medium in this stage.

Condenser Process

• In the condenser, high-pressure vapor refrigerant releases heat and transforms into liquid form through phase change facilitated by external cooling (water or air). This process effectively reduces its temperature and pressure.

Expansion Valve Role

• The high-pressure liquid refrigerant expands in the expansion valve, resulting in a drop in pressure and temperature, producing a mixture of low-pressure liquid and vapor refrigerants that flow into the evaporator.

Evaporator Functionality

• Inside the evaporator coils, this cold mixture absorbs surrounding heat, converting back into low-pressure vapor while providing a cooling effect to its environment before returning to the compressor to repeat the cycle continuously.

Conclusion on Cycle Continuity

Recap of Refrigeration Cycle