High compressor discharge temperature
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Our company has a compressor with two-stage compression. During operation in summer, both stages experience high exhaust temperatures: 130°C for the first stage and 150°C for the second stage. The exhaust pressure is normal: 0.3 MPaG at stage 1 and 1.2 MPaG at stage 2. The designed operating temperature for the cylinder is 150°C, but the outlet buffer tank is designed for 140°C. Since it is not possible to shut down the machine for inspection, could cooling be achieved by applying spray cooling to the outside of the buffer tank, or are there other methods? I would be grateful if you could offer some guidance.
Increasing the amount of cooling water for the cylinders has little effect; I’ll ask the design manufacturer to check whether the design temperature of the outlet buffer tank can be increased. I think there is enough headroom for that, so it’s possible to do so. It is not permissible to use external spraying cooling of the buffer tank to reduce temperature ； Measures should be taken to reduce the intake air temperature.
If possible, reduce the gas temperature at the compressor inlet
You can lower the temperature of the air entering the compressor, for example by increasing the water flow rate in the cooler ahead of it. Alternatively, reduce the pressure before air enters the compressor to lower the processing capacity.
Installing a water cooler after the stage 1 outlet buffer tank is the simplest and most effective measure to reduce the stage 2 inlet temperature.