The coil suction header pressure is typically measured at what temperature?

The coil suction header pressure is typically measured at around 20°F. This temperature is associated with the preferred operating conditions for many industrial refrigeration systems, especially those that use ammonia as a refrigerant. Measuring at this temperature allows for accurate representation of the system's operational effectiveness and the thermodynamic principles involved in refrigeration.

At 20°F, the system operates efficiently to absorb heat from the product being cooled. The suction header pressure correlates directly with the evaporating temperature of the refrigerant, which is critical for ensuring optimal system performance and preventing issues such as evaporator freeze-up or inefficient cooling.

Understanding the specific temperatures at which these measurements are taken helps operators maintain the refrigeration system, ensuring it runs safely and efficiently while also extending the longevity of the equipment. This is why measurements are standardized around certain temperatures based on the typical operational range of the equipment in use.