Details

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Introduction
Two-stage screw air compressor not only has the advantages of simple structure, flexible installation and high efficiency, but also highlights its own advantages of high efficiency and energy saving:
1. Can reduce the bearing load and increase the volumetric efficiency;
2. It can improve efficiency and save energy when running under partial load conditions. Two-stage screw air compressor can save up to 15% energy compared with double-screw air compressor. Each year, it can run for 8000 hours, saving about 28,000 usd per year in electricity costs.

Advantages of two-stage screw air compressor
1. Two stage compression to save compression work Divide the process into two compression processes, can reduce the compression ratio of each single-stage, which can significantly reduce the power needed for compression. For ideal gas, the power required for single-stage compression is equal to the multi-stage compression. But in the actual compression process coupling transfer, bearing friction will cause useless work, Therefore, by reducing the compression ratio of each stage can reduce the useless work, so that multi-stage compression use less power than single-stage compression. 2. Intermediate oil cooling Reduce the temperature of compressored air to next stage. When the air is compressed, the temperature will rises due to friction, temperature rise will increase the pressure of the gas and increases the compression ratio. It will need extra power to drive the device to compress the air to the desired pressure. Therefore, it provide intermediate oil cooling with the two-stage screw air compressor to reduce the temperature of compressored air to next stage.