Calculation of steam loss during the transportation of steam pipes
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How is the steam loss during transportation in steam pipelines calculated? What is the formula used for this calculation?
The steam loss during steam pipeline transportation is primarily influenced by factors such as steam pressure, pipeline length, pipe diameter, flow velocity, and the insulation condition of the pipeline. The following formula can generally be used to estimate the steam loss: Q = c × ρ × A × V^2 × K, where Q represents the amount of steam lost per unit time (in kilograms per hour) ； c is the correction factor, usually taken as 0.8 ； ρ is the density of water vapor (in kilograms per cubic meter) ； A is the cross-sectional area of the pipe (in square meters) ； V is the flow velocity (in meters per second) ； K is the friction coefficient, which can be determined based on factors such as the pipe material, insulation conditions, pipe diameter, and pipe surface roughness. It should be noted that this formula is only an estimate; the actual steam loss is also influenced by many other factors, such as the bending angle of the pipes, the installation of supports and hangers, and the method of installation. Therefore, in practical applications, calculations and measurements need to be carried out based on specific circumstances. .
HG/T 20570.21-1995 4.0.2.1.e: There is a loss in the steam supplied from general thermal power plants to the plant’s boundary area; this loss is generally taken as 15%
This post was last edited by Wise Ming on 2023-6-9 at 12:17. There are various factors that affect pipe loss, including pressure, flow rate, velocity, volume of flow, pipe diameter, distance, and insulation measures. The smaller the volume of flow, the greater the pipe loss; generally, 10% is taken as a standard value.
You must be referring to heat loss; it is related to factors such as steam temperature, ambient temperature, wind speed in the surroundings, pipe diameter, pipe length, and the insulation condition of the pipes and valves, making it difficult to calculate accurately； Another type of loss is pressure loss, which is related to factors such as steam flow rate, pipe diameter, pipe length, number of elbows, number of expansion joints, number of valves, and overall heat dissipation losses.