Question

How can moisture in the refrigeration system affect the metering device?

Answer 1

Moisture in a refrigeration system can obstruct the metering device, cause corrosion, and reduce system efficiency. It can form ice or hydrate compounds, obstructing refrigerant flow. Proper system maintenance is required to prevent moisture-related issues.

Step-by-step explanation:

Moisture in the refrigeration system can have a detrimental effect on the metering device, which is crucial for regulating the refrigerant flow into the evaporator. The presence of moisture can lead to the formation of ice or hydrate compounds, which may obstruct the metering device such as a thermostatic expansion valve (TXV) or a capillary tube. This blockage can cause a reduction in refrigerant flow, leading to a loss of cooling efficiency, or could even result in a complete system blockage. Furthermore, moisture can react with the refrigerant and oil, causing corrosion, acid formation, and eventual deterioration of system components.

For optimal performance, all moisture must be removed from the refrigeration system during installation and maintenance by proper vacuuming and the use of drying agents like desiccants. Ensuring there is no moisture in the system is crucial to maintain the longevity and efficiency of the refrigeration cycle.

Answer 2

Moisture in the refrigeration system can lead to blockages in the metering device by freezing, causing reduced cooling efficiency, system pressure fluctuations, and potential damage. It can also cause corrosive acids to form, damaging system components.

Step-by-step explanation:

Moisture in the refrigeration system can significantly affect the metering device, which is responsible for regulating the flow of refrigerant into the evaporator. If moisture is present, it can freeze at the orifice of the metering device or expansion valve, leading to blockages that restrict the flow of refrigerant. This can result in a reduced cooling effect, fluctuations in system pressure, and inefficient operation or potential damage to the system. Moisture can also lead to the formation of acids when combined with refrigerants, which can corrode the internal components of the refrigeration system, including the metering device.