『Natural gas flow calculation formula』Related information(clamp on meter|electromagnetic meter|venturi meterrotameter|orifice meter|ultrasonic flow meter|mass flow meter|coriolis mass flow meter|coriolis flow meter|magnetic flow meter|magmeter flow meter|magflow flow meter|mag meter flow meter|electromagnetic flow meter|vortex flow meter|turbine flow meter|thermal mass flow meter|thermal flow meter|rotameter flow meter)
1. How to calculate natural gas pipeline flow rate
Natural gas pipeline flow calculation formula: Q=v ·π (D/2) ², where v is the flow velocity (m/s) and D is the inner diameter of the pipeline (m) Key parameter requirements - Inner diameter error of pipeline should be less than 0.5% (GB/T 18603-2014) - Natural gas density ρ should be calculated based on actual components, with a standard state of 0.72kg/m ³ - Working temperature and pressure should be converted to standard conditions (20 ℃, 101.325kPa) 3. Equipment selection criteria - Ultrasonic flowmeter: accuracy ± 0.5% (applicable to DN100-DN1200 pipelines) - Turbine flowmeter: accuracy ± 1.0% (applicable to DN50-DN500 pipelines) - Orifice flowmeter: needs to be regularly calibrated and tested every 6 months (SY/T 6143-2020) 4 Safety precautions - TSG D7005-2018 pressure pipe collision inspection qualification is required for pressurized operations - Ex d Ⅱ BT4 and above level equipment must be used in explosion-proof areas - Flow meter installation location should meet the requirements of the first 10D and then 5D straight pipe section (D is the pipe diameter)
2. How to calculate the natural gas consumption of commercial stoves
The calculation of natural gas consumption of commercial stoves needs to be combined with equipment parameters, usage time and efficiency. Common methods include basic formula method, equipment parameter method, comprehensive estimation formula and heat load calculation method, as follows
The natural gas volume (cubic meters per hour) is usually taken as 80% of the design flow rate as the peak flow rate. For example, if the designed flow rate of the stove is 5m ³/h, the actual peak flow rate is about 4m ³/h. Tim
2. The equipment parameter method directly obtains the unit time gas consumption based on the stove type and power: the standard single eye high flame stove is about 3m ³/h, the 28 inch single head large pot stove is 4m ³/h, the 30 inch pot stove can reach 7m ³/h, and the overall range of commercial high flame stoves is between 3-14.4m ³/h. Frying and soup cooking stoves: Single eye frying stoves in catering consume 1.5-3m ³ per hour, while high-power soup cooking stoves can reach over 5m ³. Application scenario: Suitable for quickly estimating the gas consumption of similar equipment and codes. For example, if two single eye high flame stoves (3m ³/h/set) are used simultaneously for 2 hours, the total gas consumption is 3 × 2 × 2=12m ³
3. The commonly used formula for comprehensive estimation in commercial gas design is: gas consumption=∑ (equipment consumption x usage time x usage frequency)/equipment efficiency Equipment consumption: single time gas consumption (m ³/h). Usage time: Daily running time (hours). Usage frequency: Daily usage frequency (if used in different time periods, it needs to be calculated separately). Equipment efficiency is usually set at 90% -95%, reflecting the energy loss during actual operation. Example: A kitchen has two gas stoves (with a consumption of 10m ³/h, used for 4 hours a day, 2 times a day) and one gas oven (with a consumption of 15m ³/h, used for 2 hours a day), with an equipment ef
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