Contents
- 1 How do you calculate flue velocity?
- 2 How do you calculate flue gas flow rate?
- 3 What is a good pipe velocity?
- 4 How is stack flow rate calculated?
- 5 What is the composition of flue gas?
- 6 What is sonic velocity of gas?
- 7 What is the maximum gas velocity in pipe?
- 8 What is the maximum velocity in pipe?
- 9 Which is the maximum possible gas velocity in a pipe?
- 10 How is the fluid velocity in a pipe calculated?
- 11 What are the flow velocities of common liquids?
How do you calculate flue velocity?
Most power plants calculate flue gas flow rate from the net energy consumption derived from the fuel flow multiplied by the Net Calorific Value (NCV). Alternatively, the power or heat output is divided by the electrical or thermal efficiency, as appropriate, in order to determine the net energy consumption.
How do you calculate flue gas flow rate?
As shown in Figure 1.1, the dry stoichiometric flue gas flow rate (m3/s) is obtained by multiplying the heat release (MW) by a fuel factor (m3/MJ).
How do you calculate gas flow in a pipe?
qh – volumetric flow rate [m3/h]; p – pressure [Pa]; T – temperature [K]; Sg – relative density [ – ]; Lm – pipe length [km]; d – internal pipe diameter [mm]; Friction factor used in Weymouth formula is: f=0.094/d 1/3.
What is a good pipe velocity?
What is a ‘good’ pipe velocity? An installation engineer chooses pumps and sizes pipework to achieve a satisfactory pipe velocity. For water-like liquids with no entrained solids (for example: chemicals, paints, petrol, beverages), a pipe velocity of about 1 – 2 m/s is considered an acceptable value.
How is stack flow rate calculated?
To determine the velocity profile, the average gas velocity and volumetric flow rate in a stack or duct. The method is based on the measurement of the velocity pressure heads and stack gas temperatures. It takes into consideration the stack gas molecular weight, pressure and the configuration of the stack or duct.
What is the density of flue gas?
Pressure drop calculator, download version preview
| Temperature [OC] | cp [kJ/kgK] | ρ [kg/m3] |
|---|---|---|
| 0.0 | 1.042 | 1.295 |
| 100.0 | 1.068 | 0.95 |
| 200.0 | 1.097 | 0.748 |
| 300.0 | 1.122 | 0.617 |
What is the composition of flue gas?
Flue gases are a mixture of combustion products including water vapor, carbon dioxide, particulates, heavy metals, and acidic gases generated from direct (incineration) or indirect (gasification and pyrolysis) oxidation of RDF or intermediate syngas.
What is sonic velocity of gas?
A typical sonic velocity for air is 1,000 ft/s (305 m/s). When a flowing gas at some location in the pipeline experiences a local ve- locity equal to the sonic velocity of the gas at that temperature, sonic choking occurs and a shock wave forms.
What is the velocity of natural gas?
The velocity in gas lines should be less than 60 to 80 ft/sec to minimize noise and allow for corrosion inhibition. A lower velocity of 50 ft/sec should be used in the presence of known corrosives such as CO2. The minimum gas velocity should be between 10 and 15 ft/sec, which minimizes liquid fallout.
What is the maximum gas velocity in pipe?
100 m/s
Q: What is the typical natural gas pipe velocity, and what is the maximum gas pipe velocity? A: For underground installations, 20 m/s is normal. Maximum velocity in a pipeline, on the other hand, is defined by available pressure, but in control and safety valves, it can be allowed up to 100 m/s.
What is the maximum velocity in pipe?
Water velocities in pipes and tubes should not exceed certain limits
| Application | Maximum Velocity | |
|---|---|---|
| (m/s) | (ft/s) | |
| Process water | 1.5 – 3 | 5 – 10 |
| Pump discharge | 1.5 – 3 | 5 – 10 |
| Pump suction | 0.9 – 2.4 | 3 – 8 |
How do you calculate velocity in stack?
2.1 The stack gas velocity is determined by using a pitot tube to measure the velocity heads at pre-determined traverse points (ST-18) across the stack. The stack gas temperature, static pressure, molecular weight and moisture content are also measured.
Which is the maximum possible gas velocity in a pipe?
The maximum possible gas velocity in the pipe is sonic velocity, which is expressed as: where is: vs – velocity of sound; γ – isentropic coefficient; R – gas constant; T – temperature;
How is the fluid velocity in a pipe calculated?
The fluid velocity in a pipe is a fundamental data to calculate to be able to characterize the flow in a pipe, thanks to the Reynolds number, and size a pipe circuit calculating the pressure drop expected for a certain flow.
How to calculate the velocity of gas in a cylinder?
The gas, assuming ideal behavior, in a pipe (cylinder) of volume of 222.4 L has a pressure of 1.95 atmospheres and a density of 2.25 kg/m. Knowing that there will be turbulent flow, the equation, can be used. However, because this is a pipe with no change in volume, the pressure should remain even,…
What are the flow velocities of common liquids?
Typical fluid flow velocities for common liquids, gases and vapors Fluid Typical Velocity Typical Velocity Methyl Chloride, gas, steel pipe 4000 20 Natural gas, , steel pipe 6000 30 Oil lubricating, steel pipe 300 1.5 Oxygen, stainless steel 1800 – 4000 9 – 20