The power of the air compressor needs to be considered comprehensively, including the gas consumption, working pressure, running time, pipeline pressure loss, altitude and ambient temperature of the gas equipment. Here are some specific guidelines:
1. determination of gas consumption and working pressure of gas-consuming equipment
list of gas-consuming equipment:
- including the equipment name, model, quantity and their respective working pressure and gas requirements.
Calculate total gas consumption:
- for intermittent equipment, consider its working cycle and calculate the average gas consumption.
- The average gas consumption of all equipment is summed to obtain the total gas demand.
- A certain margin is reserved, and it is generally recommended to reserve 10% ~ 20% to cope with the possible increase in gas equipment in the future.
Determination of maximum working pressure:
- find the equipment that requires the highest working pressure in the gas equipment, and ensure that the selected air compressor can provide at least this pressure of gas.
2. considering pipeline pressure loss
- air will have pressure loss during pipeline transportation. The longer the pipeline, the smaller the pipe diameter, and the more elbows and valves, the greater the pressure loss.
- When selecting the power of the air compressor, it is necessary to ensure that the rated exhaust pressure of the air compressor can compensate for these pressure losses and meet the working pressure requirements of the gas equipment.
3. choose air compressor type according to running time
continuous operation:
- if the air compressor needs continuous operation, for example, in a 24-hour uninterrupted production enterprise, in order to ensure the reliability and service life of the air compressor, the air compressor with slightly higher power is usually selected. This can reduce the load rate of the air compressor and reduce the wear of the machine.
Intermittent operation:
- if the air compressor is used intermittently, such as a small repair shop, the daily working hours are shorter and the gas consumption is not continuous. The power can be selected according to the actual maximum gas consumption period.
4. consider the effects of altitude and ambient temperature
- elevation: As the altitude increases, the air density will decrease, which will cause the air intake of the air compressor to decrease, thereby affecting its output power. Generally speaking, for every 1000 meters above sea level, the displacement of the air compressor will drop by about 10%. If the factory is located in a high altitude area, the power needs to be increased appropriately.
- Ambient temperature: Excessive ambient temperature will affect the performance of the air compressor. In a high temperature environment, the air density decreases, and the air intake of the air compressor will also decrease. Moreover, the high temperature will also affect the cooling effect of the air compressor, increase the operating temperature of the machine, and reduce the efficiency. When the ambient temperature exceeds 35 ℃, the displacement of the air compressor may decrease by about 3% ~ 5% for every 5 ℃ increase. If the air compressor is installed in a high temperature environment, it is necessary to consider increasing the power appropriately or taking effective cooling measures.
5. reference air compressor power range and displacement
- the power range of air compressors is very wide, ranging from a few kilowatts of small air compressors to tens of kilowatts or even hundreds of kilowatts of large air compressors.
- Generally speaking, as the power increases, the displacement of the air compressor will increase accordingly. For example, for a screw air compressor with a pressure of 8kg, the power ranges from 5.5KW to 315KW, and the displacement ranges from 0.5 to 50 cubic meters.
6. choose well-known brands and consider maintenance costs
- choose a well-known brand of screw air compressor, which can ensure equipment quality and after-sales service.
- When choosing, in addition to the initial purchase cost, long-term maintenance costs should also be considered.
In summary, the power of the air compressor is not a fixed standard value, but needs to be considered according to the actual demand and operating conditions. It is recommended to communicate with a professional air compressor supplier or manufacturer after detailed calculation and analysis to obtain more specific and accurate recommendations.
