Is the cheap air compressor really cheap?
For the vast majority of goods, in the case of meeting the user's needs, its procurement cost is low, then it is cheap. So, is the air compressor the same? the answer is negative.
For air compressors, the purchase cost may only account for 20% of the total cost of the air compressor, and the biggest cost is its electricity consumption. If you buy a electric tiger back because it is cheap, it may cause The electricity bill will cost more than double the cost savings, so it will not be worth the loss.
Then, when we choose the air compressor, how to judge whether this air compressor is an electric tiger! Look at the specific power - the total power of the air compressor divided by the amount of gas produced per minute, the unit is Kw / (m3 / min). Specific power is one of the criteria for evaluating whether the product is energy-saving in the air compressor industry. According to the specific power, the first, second and third-level energy efficiency is determined (GB19153-2009, the more regular manufacturers will upload the energy efficiency of the equipment on the national energy efficiency network). grade).
Taking a 55kw, 8bar, 10 cubic air compressor as an example, the national secondary energy efficiency is 7.3 kW/(m3/min), the third energy efficiency is 8.4 Kw/(m3/min), and the running time is one year. 300 days, 10 hours a day, 1 degree electricity fee is 1 yuan.
The annual electricity cost for secondary energy efficiency is: 7.3÷60×300×10×60×10×1=21.19 million (specific power ÷60=the amount of electricity required per cubic gas)
The electricity cost for three-year energy efficiency operation is 8.4÷60×300×10×60×10×1=252,000 yuan.
The secondary energy-efficient air compressor can save 33,000 yuan compared with the three-stage energy efficiency, and an air compressor can generally be used for 10 years, then the electricity cost saved by it will reach 330,000 yuan, compared with the savings. The difference in electricity bills and procurement costs has become negligible, and the real "cheap air compressor" is obvious.
