Question

In an automatically operated, flooded shell-and-tube cooler, an electric float switch is used primarily to____________.

1) Control the flow of brine into the tubes
2) Control the flow of refrigerant into the shell
3) Purge oil from the cooler
4) Purge noncondensable gas from the cooler

Answer 1

An electric float switch in a flooded shell-and-tube cooler primarily controls the flow of refrigerant into the shell to maintain proper refrigerant levels and ensure efficient operation.

Step-by-step explanation:

In an automatically operated, flooded shell-and-tube cooler, an electric float switch is primarily used to control the flow of refrigerant into the shell. This is crucial for maintaining the desired level of refrigerant within the system to ensure efficient heat exchange and to prevent damage to the cooler. The cooler operates as part of a larger refrigeration cycle, where the electrically driven compressor increases the temperature and pressure of the refrigerant, which then condenses in the condenser coils, giving off heat. After condensation, the refrigerant expands and cools in an evaporator, absorbing heat from the environment. This cycle is used in various applications, including domestic refrigeration, air conditioning systems, and large industrial processes.