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Calculation Method of Gas Consumption of Equipment

2026-04-14Views:

The calculation of the gas consumption of the equipment usually depends on the specific type of equipment, the working requirements and the gas parameters. The following are general equipment gas consumption calculation methods and some specific equipment gas consumption calculation examples:

calculation formula for gas consumption of 1. general equipment

gas consumption of equipment (L)= gas flow rate consumed by equipment (L/min)× working time of equipment (min)× (gas pressure (bar) 1)÷ (temperature of 273 gas (℃))

  • gas flow consumed by equipment: Refers to the amount of gas consumed by the equipment per unit of time, usually in liters per minute (L/min).
  • Working time of equipment: Refers to the time that the equipment needs to run, usually in minutes (min).
  • pressure of gas: Refers to the pressure of the gas required by the equipment, usually in bar (bar). At atmospheric pressure, the gas pressure is 1 bar, so the pressure of the gas in the formula needs to be increased by 1.
  • temperature of the gas: Refers to the temperature of the gas required by the equipment, usually in degrees Celsius (°C).

Example of gas consumption calculation for 2. specific equipment

1. Air compressor

  • air consumption calculation: Air consumption = exhaust volume × compression ratio × atmospheric pressure ÷ absolute temperature. The standard value of atmospheric pressure is 101.32 5千帕, and the absolute temperature can be obtained by adding 273.15 to the temperature in Celsius.
  • Air compressor gas calculation air consumption of air compressor = air consumption × operation time.

Another calculation is as follows:

  • gas consumption calculation: Gas consumption = (working pressure × flow) ÷ (gas density × compression ratio).

Among them, the working pressure refers to the pressure value required to reach when the air compressor outputs gas, the flow rate refers to the volume of gas passing through the air compressor per unit time, and the gas density depends on the type of gas used (such as air, nitrogen, oxygen, etc.), The compression ratio refers to the ratio of the gas volume of the air compressor inlet and outlet.

2. Gas equipment

  • standard gas equipment: Calculate and determine according to the gas consumption or heat load calibrated on the nameplate of the equipment. If the rated heat load is marked on the equipment nameplate, the natural gas consumption can be calculated according to the gas heat load.
  • Heating equipment using other fuels: When it is necessary to switch to gas, it can be calculated and determined according to the actual consumption of the original fuel.

3. Calculation Considerations

  • gas type and purity: Different equipment may have different gas requirements, such as a gas of a specific purity or a specific gas mixture. The required gas type and purity need to be determined before calculation.
  • Safety, leakage and development factor: When calculating the gas consumption of the equipment, it is also necessary to consider the safety, leakage and development coefficient to ensure that the gas supply can meet the actual demand and leave a certain margin.
  • Actual testing and estimation for existing plants, a simple test can be used to determine whether the compressed air supply is sufficient, and if it is insufficient, the amount of air that needs to be increased can be determined by estimation.
  • Equipment efficiency: The actual gas consumption of the equipment may be affected by the efficiency of the equipment. For example, older equipment may be less efficient and require more gas to do the same job.
  • Working environment: The working environment may also have an impact on the gas consumption of the equipment. For example, a high temperature environment may increase the expansion of the gas, thereby affecting the calculation of gas usage.

To sum up, the calculation of gas consumption of equipment is a complex process involving multiple variables. In the calculation, it is necessary to consider the specific type of equipment, work requirements and gas parameters to ensure the accuracy and reliability of the calculation results.

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