Normal. The operating principle of the screw compressor determines the energy consumption of the compressor, when the compressor's gas production is greater than the amount of air compressor will be unloaded, when the amount of gas used by the equipment is greater than the amount of gas produced by the compressor will be loaded, so that non-stop loading and unloading caused by the pressure of the pipeline network is very unstable, the current fluctuations are also relatively large. Second, energy-saving space analysis 1, the compressor unloading compressor to do all the useless work. 2, when the compressor loading pressure is also unnecessary, because the loading pressure is set to the minimum demand pressure. Third, the calculation of energy consumption 1, unloading energy consumption of about 52% of the compressor power (you can measure the current to get accurate data) 220A/420A = 52% (compressor power full load of about 250kW), unloading power = 250 × 52% = 130kW, loading power of 250kW. 2, the KP pressure rise of 1KG, the energy consumption of the whole system of about 7%. 3, the pressure is set between 5.7kg -7.0kg, put the pressure setting is your minimum demand pressure. -7.0kg, the air compressor's air inlet door is always open, the air compressor is theoretically out of the state of loading all the time. 4, statistical period *** 230 hours of operation records, the average loading rate of the air compressor is 57.7%, the average unloading rate of 42.3%, the air compressor monthly average running time of 700 hours. 5, the monthly savings calculation: Monthly unloading to do no use of power = unloading power × unloading rate × operation Time = 130kW × 42.3% × 700 = 38493 degrees
Monthly loading 1kg pressure consumption = loading power × loading rate × running time × KP = 250 × 57.7% × 700 × 7% = 7068.2 degrees = 7068 degrees Monthly total savings = monthly unloading of the useless power + monthly loading 1kg pressure consumption = 38493 + 7068 = 45561 degrees but the unloading rate is 42.3% × 700 hours. 7068 = 45561 degrees, but the compressor transformation frequency conversion can not be completely eliminated unloading, because the screw compressor frequency conversion to 25HZ and then can not be lowered speed, reduce the efficiency of the rapid decline, so the unloading of 20% of the energy can not be saved, so that the total monthly savings of = 45,561X80% = 36,449 degrees of electricity consumption records: air compressor monthly power consumption of 158,760 degrees of power savings! rate