Ammonia Refrigeration Plant Operator Interview Questions and Answers

An ammonia cooling tower operates on the principle of evaporative cooling to remove heat from ammonia refrigerant.

• Ammonia refrigerant is circulated through the tower where it absorbs heat from the surroundings.

• Water is sprayed over the ammonia coils, causing some of it to evaporate and absorb heat from the ammonia.

• The heat absorbed by the evaporating water is released into the atmosphere, cooling the ammonia and allowing it to return to the system for further cooling.

• The proc...read more

Refrigeration is a process of removing heat from a space or substance to lower its temperature. Compressors are used to increase the pressure of refrigerant gas.

• Refrigeration is the process of removing heat from a space or substance to lower its temperature.

• Compressors are used to increase the pressure of refrigerant gas, which then flows through the system to absorb heat and cool the space.

• There are different types of compressors used in refrigeration systems, such as recipr...read more

The boiling point of ammonia is -33.34 degrees Celsius (-28.01 degrees Fahrenheit).

• The boiling point of ammonia is -33.34 degrees Celsius or -28.01 degrees Fahrenheit.

• Ammonia boils at a relatively low temperature compared to many other substances.

• At its boiling point, ammonia changes from a liquid to a gas.

Refrigeration gas works by absorbing heat from the surroundings, lowering the temperature, and then releasing the heat elsewhere.

• Refrigeration gas is compressed to increase its temperature and pressure.

• The hot gas then flows through a condenser where it releases heat and condenses into a liquid.

• The liquid refrigerant passes through an expansion valve, reducing its pressure and temperature.

• The cold liquid then absorbs heat from the surroundings, such as air or water, causing i...read more