Can reducing the compressor inlet temperature save electricity?
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Dear sea friends: Assume that two compressors are designed with a flow rate of 20,000 NM3/h and an inlet pressure of 1.4 MPa. In actual production, the inlet flow rate remains constant at 16,000 NM3/h, the inlet pressure is 1.0 MPa, and the outlet pressure remains constant at 15.5 MPa, which is the synthesis pressure. By reducing the compressor’s inlet temperature by 10°C, and while ensuring proper cooling at the outlets of each stage of the compressor, it is possible to reduce the compressor’s power consumption.
My personal opinion: First, the power consumption of a compressor depends on its power draw; since the inlet pressure and flow rate remain unchanged, the impact on power consumption should not be significant. Second, with constant pressure and flow rate, if the temperature drops by 10°C, the mass flow rate is likely to increase, so power consumption should rise as well – of course, except in the case of refrigeration compressors.
The inlet flow rate remains constant, but the pressure changes; the overall inflation volume stays the same
It has a certain impact. Energy can be saved to some extent; the import density increases.
Theoretically, it should decrease, as the power consumption of the compressor is directly related to the temperature at the secondary inlet. There is an engineering calculation formula.