Contents
Why temperature compensation is required in flow measurement?
Why do you do process temperature and pressure flow compensation? In steam or gas flow measurement, the density of the steam or gas changes as pressure and temperature change. This change in density can affect the accuracy of the measured flow rate if it is uncompensated. Temperature.
How do you calculate steam flow with temperature and pressure?
Step 1: Determine Properties of Steam Produced The Specific Enthalpy is then multiplied by the Mass Flow to get the Energy Flow: Pressure = 121.7 psig. Temperature = 242.3 °C. [Steam Property Calculator] => Specific Enthalpy = 1,259.0 btu/lbm.
What does pressure-compensated mean?
Pressure compensation is the control of flow by compensating for the changes in load pressure. Most hydraulic systems today use pre-compensation as a means of maintaining consistent flow from an orifice or spool.
How can temperature changes be automatically compensated?
Automatic Temperature Compensation (ATC), which compensates for the varying milli-volt output from the electrode due to temperature changes of the process solution and Solution Temperature Compensation (STC), which corrects for a change in the chemistry (change in pH) of the solution as the temperature of the solution …
Does temperature affect EC?
The electrical conductivity (EC) of an aqueous solution increases with temperature significantly: about 2 per degree Celsius.
What is self temperature compensation?
Self-compensated strain gauges are specially developed to compensate for the temperature behavior of certain materials by their own temperature behavior. This means that they counteract the apparent strain (and thus the temperature-induced expansion of the measuring body).
How do you convert steam pressure to temperature?
Step 1: Determine Properties of Steam Produced The Specific Enthalpy is then multiplied by the Mass Flow to get the Energy Flow: Pressure = 412.5 psig. Temperature = 257.0 °C. [Steam Property Calculator] => Specific Enthalpy = 1,238.3 btu/lbm.
Why do you need to compensate for pressure and temperature?
If you want to perform a density compensation in the flow measurement you must take into account the density variation. The variations in pressure and temperature have a significant effect on steam or gas density, this is why without this pressure and temperature compensation the flow measurement can have large errors.
How is the flow compensated for a change in temperature?
The flow output calculated is 28843 m 3 /hr. Resultant compensated flow due to change in temperature can be derived by the following equation Flow Compensated = 30,000 * SQRT (300/325) =~ 28,823 m3/hr Hence, for this example, a 25 K increase in temperature resulted in a 3.8% less flow.
Why is temperature ignored in liquid flow calculations?
Temperature usually is ignored in liquid flow calculations because its effect is too small. Temperature has a greater effect on gas flow calculations, because gas volume expands with higher temperature and contracts with lower temperature. But similar to specific gravity, temperature affects flow by only a square root factor.
How does temperature affect the flow of gas?
Temperature has a greater effect on gas flow calculations, because gas volume expands with higher temperature and contracts with lower temperature. But similar to specific gravity, temperature affects flow by only a square root factor.