Specific power of air compressor

Summary of information: We often say that screw air compressors save electricity or not, loading depends on specific power, and unloading depends on internal pressure. Specific power is one of the important indicators to measure whether an air compressor is energy-saving. Many users only focus on the current purchase cost when purchasing air compressors, and I will buy whoever is cheaper. This must be a very unprofessional approach. The air compressor bought at a low price may be an electric tiger, but in the future, watching the electric meter fly like a gyroscope will make me feel heartbroken.

What is specific power? Specific power is the input power of the air compressor unit (note: assuming the motor power of an air compressor is 37KW, this 37KW refers to the output power, and the actual operating power is greater than 37KW) divided by the actual gas production, and the value obtained is the input specific power of the air compressor, in kW/cubic meter/min.

According to the GB19153-2009 standard published by the country, by searching for motor power, exhaust pressure, cooling method, etc., it can be seen whether the energy efficiency index of the air compressor is level one, level two, or level three.

For example, a screw machine with a power output of 37KW, a gas output of 6 cubic meters per minute, and a working pressure of 8 kilograms has been found to have a first level energy efficiency of less than 7.2; Between 7.3 and 8.1, it belongs to the second level of energy efficiency; The range of 8.2 to 8.9 is the third level of energy efficiency; If it is greater than 8.9, it is considered a super power consuming product and production is not allowed by the state.

Now let's make a comparison. For a 6-cubic meter air compressor, one manufacturer has a specific power of 7.1KW/M3/min (first level energy efficiency), while the other manufacturer has a standard power of 8.6KW/M3/min (third level energy efficiency). Therefore, a first level energy efficient air compressor saves electricity per hour (8.6-7.1) * 6=9 kWh compared to a third level energy efficient air compressor, which costs 1 yuan per hour for industrial electricity and works for 10 hours per day and 300 days per year, So you can save 9 * 10 * 300=27000 yuan in one year.

The investment for the air compressor used in the factory consists of three parts: the initial purchase cost, the daily operating cost, which is the electricity cost, and the maintenance cost. Usually, the initial purchase cost only accounts for a small part of the total investment. So when users purchase an air compressor, they need to know more about the specific power of the air compressor. A good air compressor is more expensive than some cheaper brands of air compressors, but the saved electricity cost can be recovered in about a year. A single air compressor can take at least ten or eight years to use, so it's better for users to calculate this by themselves.

JOY MACHINERY always adheres to the corporate vision of "building a leading brand of oil-free air compressors in the world", and hopes to provide high-quality, clean and safe air for food, beverage and other production enterprises on the road of oil-free air compressor research and development, production and sales. Source protection, and also contribute a little bit to people's health and safety.

JOY MACHINERY oil-free air compressor series is widely used in the food and beverage processing industry due to its clean air source and continuous and stable gas transmission. If you have any needs, please contact us! JOY Machinery (Shanghai) Co., Ltd. has a professional design team with rich experience and welcomes customization. Diversified products can meet most applications and meet your one-stop shopping needs. The air compressor series includes power frequency screw air compressors, variable frequency screw air compressors, permanent magnet variable frequency screw air compressors, two-stage compression screw air compressors, integrated screw air compressors, laser cutting air compressors, medium and high pressure air compressors. Air compressors, oil-free water-lubricated screw air compressors (special oil-free screw air compressors for the medical industry), diesel-moving screw air compressors, electric-moving screw air compressors and other products.

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