Question 179Refrigeration & AC - Assistant Engineer

The correct answer is D) thermostatic expansion valve. The thermostatic expansion valve is the component where flash gas formation is a normal occurrence. As the refrigerant passes through the thermostatic expansion valve, the pressure drop causes a portion of the liquid refrigerant to vaporize, creating flash gas. This flash gas is an important part of the refrigeration cycle, as it helps to ensure that only vapor enters the compressor, preventing liquid refrigerant from damaging the compressor. The other components listed (evaporator coil, condenser coil, and receiver tank) are not where flash gas formation normally occurs in the refrigeration system.