Introduction to Walk-In Freezers : Condenser

 1. Definition and Function:

• The condenser removes heat from the high-pressure refrigerant vapor, condensing it into a high-pressure liquid.
• Operates on the high-pressure side of the system.
• Releases heat outside the cooling zone during the condensation process.

2. Phases of Operation:

• Superheated Vapor Cooling: The superheated vapor cools to its condensing temperature.
• Condensation: The refrigerant changes state from vapor to liquid throughout most of the coil.
• Subcooling: The liquid refrigerant cools below its condensing temperature.

3. Key Temperatures:

• Condensing Temperature: Temperature at which refrigerant starts to condense.
• Ambient Temperature: Temperature of the air around the condenser coil.
• Condenser Split: The temperature difference between condensing and ambient temperatures. A higher condenser split indicates more work for the system; more coil surface area lowers the condenser split.

4. Placement:

• Condensers can be placed on the ceiling or in the wall, with ceiling condensers being the most common.
• Placement depends on storage height, room size, and other factors.
• Should be placed in a well-ventilated area.

5. Common Failures:

• Fan Motor Failure: If the compressor is working but the condenser fan is not running.
• Dirty Coils: Restricted airflow due to dirty condenser coils.
• High-Pressure Limit Switch: Trips if the pressure becomes too high, shutting off the compressor to prevent damage.

6. Maintenance:

• Regularly clean condenser coils to prevent airflow restriction and high-pressure issues.
• Consider using electronically commutated motors in modern condenser fans to reduce energy consumption by two-thirds.

Importance:

• Maintaining condensers is crucial for efficient refrigeration system operation.