SILVER AUTOMATION INSTRUMENTS HTTP://WWW.SILVERINSTRUMENTS.COM SGW Gas Turbine Flowmeter (2013 Edition) 1.Product Description Integrated temperature sensor,pressure sensor ,flow sensor and intelli- gent flow accumulator,the self-developed gas turbine flow meter of SGW series,which assimilates the advanced technology of flow meters from home and abroad with optimum design,is a new generation of gas flow meter with high precision and reliability based on the theory of pneuma tics,hydromechanics,electro –magnetic etc.It has excellent performance under both low and high pressure ,various ways of signal output and low sensitivity to the fluid turbulence. Thus it is widely applied to the measurement of gas flow ,such as natural gas ,coal gas ,LPG ,light hydrocarbon gas and so on. The product has been certified by General Administration of Quality Inspection for Explosion – Proof Prod- ucts according to the GB3836.2000<Electrical Apparatus for Explosive Gas Atmospheres –Part 1:General Requirement >,GB3836.2-2000<Electrical Apparatus for Explosive Gas Atmospheres –Part 2:explosion- proof”d”>and GB3836.4-2000<Electrical Apparatus for Explosive Gas Atmospheres –Part 4; Intrinsically Safe Type ”i”>The ex-marking is Exd IIBT6(explosion –proof )and/or Exi aⅡCT6(Intrinsically Safe Type).It is suitable for zone 0(Intrinsically Safe type only ), 1,2 Hazardous (classified) Locations , Dangerous Gases or Vapors Zone : IIA , IIB, IIC and Temperature Classes:T1~T6. 2. Specifications Table 1 Performance Repeatability ±0.2% Accuracy Standard: ±1.5% of reading; Optional:±1.0% Wetted Components Housing Standard - Tungsten Carbide Optional - 304, 316 Stainless Steel Bearings and Shaft ABS (Corrosion Resist) or Aluminium-Alloy Rotor ABS (Corrosion Resist) or Aluminium-Alloy Retaining Rings 304 Stainless Steel Output Signal (Where applicable) Sensor Pulse signal (Low Level: ≤0.8V; High Level: ≥8V) 1
8
Embed
SGW Gas Turbine Flowmeter (2013 Edition)turbina+de+Gas.pdf · SGW Gas Turbine Flowmeter (2013 Edition) 1.Product Description. Integrated temperature sensor,pressure sensor ,flow sensor
This document is posted to help you gain knowledge. Please leave a comment to let me know what you think about it! Share it to your friends and learn new things together.
The working pressure (pressure in the meter) of a gas pipeline is 0.8MPa~1.2MPa,temperature of the medium is -5°C~+40°C.gas supply amount is 3000 ~8000Nm3/h(flow in standard condition ),please determine of the flow meter with the consideration of component of nature gas. Analysis :The flow range given in Table 3 is flow range in working condition .In the example , the given flow range is standard flow ,so there is need to convert standard flow to flow in working condition with gas equation.Then, choose the suitable diameter.Gas equation is as follows:
Here : Qb is standard flow , m3/h; Q is folw under working condition,m3/h; C is converting coefficient .(Please refer to Table 6,the data in this chart os only suitable when convert coefficient in model selection)
:gas compressed factor,calculate from the standard SY/T6143-1996 of China National Petroleum Corporation. The data in Table 7 is only for reference , The data was calculated with condition that real relative density of nature gas is Gr=0.600, Molar number of molecules of Nitrogen and Carbon dioxide is 0.00.When pressure of medium is below 0.5MPa,calculate it with Zb/Zg . Calculation:
① When the medium has the minimum pressure(0.8MPa)and maximum temperature(+40°C)(this is the gas supply peak),there should be the maximum standard flow.(No consideration for the effect fromFz when doing model selection,local atmospheric pressure is 101.325 KPa): That is
Or comment it with the equation as follows (in the equation,C is convert coefficient,refer to Table 6):
② When the medium has maximum pressure(1.2MPa) and minimum temperature(-5Ⅱ)(this is the gas supply valley),there should be the minimum standard flow.
That is
Or comment it with the equation as follows:
Model selection:according to the result calculated above,the flow range in working condition of the selected flow 213.5~965.472 m3/h .After referring Chart 2,-D150s/s/s/n should be selected.
In this chart p is pressure of the meter and T is temperatureNote:1. Data in the chart calculated acccording to local atmospheric pressure 2. Pressure is the pressure of the meter
Table 6 converting coefficient C calculated from gas equation
In this chart p is pressure of the meter and T is temperatureNote:1. Data in the chart calculated acccording to local atmospheric pressure 2. Pressure is the pressure of the meter