In a two-stage ammonia refrigeration system, which compressor is generally started first?

In a two-stage ammonia refrigeration system, the highside compressor is typically started first to establish the essential high-pressure side of the system. When the highside compressor is initiated, it begins to operate at higher pressures, allowing for proper flow of refrigerant throughout the system. This is crucial for achieving an effective compression cycle.

Starting the highside compressor first helps ensure the safe and efficient operation of the refrigeration system. The highside compressor works with the condensing side, which needs to be operational for the low-pressure side to function properly. Once the highside compressor is up and running, the lowside compressor can be started, allowing for the complete two-stage cycle to commence. This sequence is vital for maintaining the pressure differentials and fluid dynamics that are necessary for the system’s optimal performance.