Which of the following is a method used to ensure proper refrigerant flow in a cooling system?

Installing a thermal expansion valve is indeed a method used to ensure proper refrigerant flow in a cooling system. This component plays a crucial role in regulating the amount of refrigerant that enters the evaporator. By controlling the flow based on the cooling demands and the temperature of the refrigerant, the thermal expansion valve helps maintain optimal operating conditions. It ensures that the refrigerant is neither over-fed nor under-fed to the evaporator, which is vital for efficient cooling performance and system reliability.

The functionality of the thermal expansion valve directly influences the system's ability to absorb heat and maintain the desired temperature. By maintaining appropriate refrigerant flow, it contributes to the overall efficiency of the cooling system, thereby enhancing performance and preventing issues such as freezing of the evaporator or compressor failure due to inadequate refrigerant levels. This regulation is essential for maximizing cooling efficiency and reducing energy consumption in HVAC systems.