Unit 22 Refrigeration System Flashcard

Front

What is the function of a water regulating valve in a refrigeration system?

Back

A water regulating valve modulates the flow of water through the condenser to maintain optimal head pressure.

Front

How is a shell-and-tube condenser cleaned?

Back

A shell-and-tube condenser is cleaned with a brush after removing the end caps.

Front

What are the main functions of a condenser in a refrigeration system?

Back

The condenser desuperheats the vapor from the compressor, condenses the vapor, and subcools the liquid refrigerant before it leaves the condenser.

Front

True or False: A water regulating valve helps to maintain a system's head pressure by modulating the flow of refrigerant through the condenser.

Back

False. It modulates the flow of water, not refrigerant.

Front

What does the refrigerant do in a condenser?

Back

The refrigerant rejects heat in the condenser.

Front

What is head pressure in a refrigeration system?

Back

Head pressure is the pressure in the condenser that is necessary to condense the refrigerant from vapor to liquid.

Front

What is the purpose of a fan in a water-cooled condenser?

Back

The fan helps to dissipate heat from the condenser by increasing airflow.

Front

What is the role of dampers or louvers in a refrigeration system?

Back

Dampers or louvers control the airflow to maintain the desired temperature and pressure in the condenser.

Front

What happens to the refrigerant after it leaves the condenser?

Back

After leaving the condenser, the refrigerant is in a liquid state and is sent to the expansion device.

Front

What is the difference between subcooling and superheating in refrigeration?

Back

Subcooling refers to cooling the liquid refrigerant below its condensation temperature, while superheating refers to heating the vapor refrigerant above its boiling point.