The efficiency index of the air compressor screw main engine - specific power is the determining factor of energy saving.
Theoretical and practical proof: the efficiency of the screw main engine depends on its rotor profile, rotor machining accuracy, rotor meshing clearance, exhaust end clearance; depends on the errors caused by these four factors in the production process, and depends on the superposition of these errors in the "internal leakage" of the screw main engine operation.
As we all know, the basic characteristic of gas is that high pressure "leaks" to low pressure. "Internal leakage" means that in a closed screw main engine working chamber, the high-pressure air "occupies" the "harmful volume" caused by the above four errors between the rotor and the shell and cannot go out (sealed by lubricating oil), and the fresh low-pressure air that should have been inhaled cannot come in. The larger the harmful volume, the greater the internal leakage, the greater the power consumption, and the higher the specific power of the screw main engine! The technical parameter for measuring the efficiency of a screw main engine is called "specific power" kw/(m3.min-1). That is: the power consumed by exhausting one cubic meter of compressed air every minute. A smaller specific power data means that the same compressed air produced by the Kaishan air compressor consumes less power.
For example: for the air-cooled screw air compressor with the same rated exhaust pressure of 0.7Mpa, the input power of the driving motor is 22kw and 37kw respectively. The input specific power of the units at each energy efficiency level is: Level 3: 8.4 Level 2: 7.6 Level 1: 6.8 kw/(m3.min-1) . It can be seen that the unit input power ratio is the only hard indicator. ===> Take a 22kw air compressor as an example: with the same volume flow of 3.5m3/min, the power consumption per hour of the three-level energy efficiency machine is 3.5*8.4-3.5*6.8=5.6kw more than that of the first-level energy efficiency machine. If 1 kWh is calculated at 1 yuan, an additional 5.6 yuan of electricity fee will be paid per hour, and an additional 134.4 yuan will be spent per day! (Each kWh = 1kw.h)