Air compressor: selection of air compressor
Air compressor: According to incomplete statistics, the power consumption of the compressed air system accounts for 10%-30% of the power consumption of the enterprise, and 96% of the energy consumption of the compressed air system is the power consumed by the compressor.
In fact, in most compressors in the operation of the common group of complex problems. Such as: low efficiency, equipment operation parameter setting is not ideal, equipment mismatch, pipe network pressure loss, early selection is not scientific, system leakage, artificial demand, improper use, improper system control, etc..
The low cost strategy of compressed air system should focus on energy saving and consumption reduction. A lot of manpower and material resources are consumed in the procurement and use of air compressor system. So, in the initial construction, how to plan and choose the air compressor system is energy saving and consumption reduction?
I. Common unreasonable phenomena of air compressor system
Buying an air compressor
When purchasing, we only considered the low price of the machine, and found that the quality was poor, the operation was unstable, and the downtime was long, resulting in the production line shutdown loss;
Purchase only consider the operation stability, ignore the proportion of energy consumption, resulting in a huge waste over time;
The procurement ignored the after-sales service quality of suppliers, trouble shooting could not arrive in time, and spare parts procurement was not convenient, which caused unnecessary losses.
Second, system organization
The reason for the high waste of empty energy of air compressor is that the capacity of air compressor is too large.
There are too many filters installed, large pressure loss, high energy waste;
Air compressor is not centralized gas supply, but distributed throughout the plant, independent pipeline, not only increases the cost of equipment purchase, but also increases;
Iii. Pipeline costs and operation and maintenance costs;
The ambient temperature of the air compressor room is too high, which is equivalent to reducing the efficiency of the air compressor, reducing displacement and increasing energy consumption. Every 10℃ increase in ambient temperature, the efficiency of the air compressor will be reduced by about 3%. Unreasonable piping arrangement, excessive elbow, increase pressure loss.
Iv. System control and management
The outlet pressure of the air compressor is set too high, resulting in energy consumption increase and waste. For every 1kg/cm increase in pressure, energy consumption increases by about 7%.
Multiple air compressors run at the same time for loading and unloading or capacity adjustment (partial load), increasing energy waste;
Machine maintenance is not good or overdue, small problems accumulate into big failures, machine life is artificially shortened;
The machine room environment is too dirty, resulting in frequent replacement of air compressor filters, oil filters, oil and gas separators and cooling oil;
Pipeline filter is not replaced in time, pressure loss is too large, serious energy waste;
I do not know whether the pipeline leakage is serious, so I use the newly bought air compressor to supplement the insufficient air volume, resulting in waste.