Reciprocating compressor

The allowable piston force for this unit, along with the actual motor load, can be determined by calculating the motor power and cylinder diameter, and then figuring out what value can be achieved as a result.

To redo the thermodynamic and power calculations for the compressor unit, many parameters are required. This needs to be calculated by the original manufacturer; those who use it generally cannot do this calculation. Because many technical parameters are not provided to the users

It is recommended that you contact the original manufacturer directly, provide them with the parameters you want, and let professionals carry out the calculations

Check the rated power of the motor to see if it meets the requirements for use

It mainly depends on the maximum allowable exhaust temperature at the current motor power, the required maximum allowable piston force, as well as the allowable operating pressure of the cylinder

1. Due to the constraints set by the topic posed by the original poster – namely, only an increase in the pressure difference between the inlet and outlet – understanding the maximum allowable pressure difference simplifies the issue. 2. When selecting a reciprocating machine, various calculation parameters such as the overall piston force include safety margins; the maximum load corresponds to the outlet pressure at which the safety valve activates. 3. With all other conditions remaining unchanged, increasing the pressure difference between the inlet and outlet will inevitably increase the load on the piston rod and raise power consumption； Furthermore, as the inlet pressure increases, the tendency for the load to rise due to the increased pressure difference also grows. 4. Operating with an increased pressure difference consumes the compressor’s excess capacity; the extent to which this can happen depends on the amount of excess capacity the compressor originally has, as well as the minimum safety margin that the user is willing to accept. 5. Therefore, it is sufficient to determine the computational load resulting from operating with the original parameters, and by comparing this with the load that the compressor can handle, the difference represents the maximum limit. 6. The parameters required for estimation include process parameters such as pressure, temperature, and flow rate, as well as gas property parameters; structural parameters mainly involve the piston diameter and piston rod diameter

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