Whether a certain type of compressor structure is energy-saving can not be simply analyzed from the specific power data, the specific power only identifies the energy consumption level of the head, and the specific power, specific capacity, speed, and cooling method are different under the same exhaust pressure. Changes in a certain range, but the magnitude of change is not very large, in extreme cases can be a difference of a kilowatt. Many applications limit the optimization in terms of specific power. For example, the specific power level of water-cooled compressors is significantly better than that of air-cooled compressors. The specific power level of piston compressors is significantly better than that of rotary compressors. However, many users still choose air-cooled screw compressors based on the conditions of use. The energy saving of the compressor should be an optimization under the conditions of the first use.
From the perspective of thermal energy utilization, the optimization of specific power is only a minor improvement. The power consumed by the compressor will be dissipated to the surrounding environment in the form of heat. The recycling of these heat energy is really meaningful energy-saving measures. For example, for a 55 kW screw machine, the specific power of the air-cooled product is 6.7 kW/(m3/min), the specific power of the water-cooled product is 5.8 kW/(m3/min), and the water-cooled product replaces the air-cooled product. Maximum energy saving 10kW. However, if the heat recovery rate is 50%, energy savings can reach 27.5 kW. In short, the energy-saving effect of heat energy recycling is obviously greater than that of specific power optimization, and in many cases it is inconvenient to use water-cooled compressors.
From the perspective of thermal energy utilization, the optimization of specific power is only a minor improvement. The power consumed by the compressor will be dissipated to the surrounding environment in the form of heat. The recycling of these heat energy is really meaningful energy-saving measures. For example, for a 55 kW screw machine, the specific power of the air-cooled product is 6.7 kW/(m3/min), the specific power of the water-cooled product is 5.8 kW/(m3/min), and the water-cooled product replaces the air-cooled product. Maximum energy saving 10kW. However, if the heat recovery rate is 50%, energy savings can reach 27.5 kW. In short, the energy-saving effect of heat energy recycling is obviously greater than that of specific power optimization, and in many cases it is inconvenient to use water-cooled compressors.