How can an overpressurized refrigeration system be relieved?

Fitting a rupture disk in series with a relief valve is an effective method for relieving an overpressurized refrigeration system. The purpose of a rupture disk is to provide an emergency relief mechanism that operates when pressures exceed safe levels. Rupture disks are designed to break at a designated pressure, allowing the system to vent excess refrigerant safely and prevent potential damage or catastrophic failure.

Incorporating a rupture disk alongside a relief valve creates a dual safety system. The relief valve is typically set to open at a specified pressure to release refrigerant during normal operating conditions, while the rupture disk serves as a fail-safe by providing an additional layer of protection if the pressure reaches levels beyond what the relief valve can manage. This combination ensures that the system maintains safe operating pressures.

The other options may not effectively address the issue of overpressure. For instance, installing a larger compressor or increasing the condenser size does not directly mitigate overpressure; these actions can potentially exacerbate the situation. Reducing the refrigerant charge could help lower pressure but may also lead to a system operating below optimal levels, which can affect its efficiency and functionality.