Flow Rate Sensor (MA)
Measurement of mass, volume and energy flow in a wet air network.
blockType: AcausalFoundation.MoistAir.Sensors.FlowRate
|
Path in the library: |
.svg)
Description
The Flow Rate Sensor (MA) unit is an ideal sensor that measures mass flow rate, energy flow rate and volume flow rate in a humid air network. Pressure, temperature, specific humidity or mass fraction of impurity gases do not change on the sensor.
The unit is connected in series with the component to be measured.
The mutual orientation of the ports A and B sets the sign of the measurement. The sign is positive if the flow is from port A to port B and vice versa.
Switching the connections to the ports reverses the sign of the measurement.
Five ports are available to output measurement data:
-
Port M outputs mass flow rate.
-
The V port outputs the volumetric flow rate.
-
Port φ outputs the energy flow rate.
-
Port Mw outputs the mass flow rate of water vapour.
-
Port Mg outputs the mass flow rate of impure gases.
These ports are displayed on the unit icon depending on the unit settings. Adjust the unit parameters to display only those ports that are required for measurements in a particular model.
Ports
Conserving
#
A
—
sensor input
`humid air
Details
Humid air port, corresponds to the sensor inlet. The flow rate is positive when air flows from port A to port B.
| Program usage name |
|
#
B
—
sensor input
`humid air
Details
Humid air port, corresponds to the sensor input. The flow rate is positive when air flows from port A to port B.
| Program usage name |
|
Output
#
M
—
mass flow rate, kg/s
scalar
Details
Output port for mass flow measurement.
Dependencies
To use this port, select the checkbox Mass flow rate.
| Data types |
|
| Complex numbers support |
No |
#
φ
—
energy consumption, W
scalar
Details
Output port for measuring energy consumption.
Dependencies
To use this port, tick the checkbox Energy flow rate.
| Data types |
|
| Complex numbers support |
No |
#
V
—
volumetric flow rate, m3/sec
scalar
Details
Output port for volumetric flow measurement.
Dependencies
To use this port, select the checkbox Volumetric flow rate.
| Data types |
|
| Complex numbers support |
No |
#
Mw
—
mass flow rate of water vapour, kg/sec
scalar
Details
Output port for measuring the mass flow rate of water vapour.
Dependencies
To use this port, select the checkbox Water vapor mass flow rate.
| Data types |
|
| Complex numbers support |
No |
#
Mg
—
mass flow rate of impurity gases, kg/sec
scalar
Details
Output port for measuring the mass flow rate of impurity gases.
Dependencies
To use this port, select the checkbox Trace gas mass flow rate.
| Data types |
|
| Complex numbers support |
No |
Parameters
Parameters
# Mass flow rate — switching on the output port for mass flow measurement
Details
Select this checkbox to have the sensor measure mass flow rate.
Selecting this checkbox opens the M output port.
| Default value |
|
| Program usage name |
|
| Evaluatable |
No |
# Volumetric flow rate — switching on the output port for volumetric flow measurement
Details
Select this checkbox to have the sensor measure volumetric flow rate.
Selecting this checkbox opens the V output port.
| Default value |
|
| Program usage name |
|
| Evaluatable |
No |
#
Volumetric flow measurement conditions —
conditions for volumetric flow measurement
Actual conditions | Standard conditions
Details
Select whether the sensor calculates the volumetric flow rate under actual operating conditions or at standard pressure, temperature, and relative humidity:
-
Actual conditions- the sensor calculates the volumetric flow rate using the density of moist air under actual system operating conditions. -
Standard conditions- the sensor calculates the volumetric flow rate using the density of moist air under standard conditions. If this option is selected, additional parameters are available to set standard pressure, temperature, and relative humidity.
Dependencies
To use this option, select the checkbox for the parameters Volumetric flow rate.
| Values |
|
| Default value |
|
| Program usage name |
|
| Evaluatable |
No |
#
Standard pressure —
Humid air pressure at standard conditions
Pa | GPa | MPa | atm | bar | kPa | ksi | psi | uPa | kbar
Details
Humid air pressure at standard conditions.
Dependencies
To use this parameter, select the check box for the parameter Volumetric flow rate, and set the value for the parameter Volumetric flow measurement conditions to Standard conditions.
| Units |
|
| Default value |
|
| Program usage name |
|
| Evaluatable |
Yes |
#
Standard temperature —
Humid air temperature at standard conditions
K | degC | degF | degR | deltaK | deltadegC | deltadegF | deltadegR
Details
Humid air temperature at standard conditions.
Dependencies
To use this parameter, select the check box for the Volumetric flow rate parameter and set the Volumetric flow measurement conditions parameter to Standard conditions.
| Units |
|
| Default value |
|
| Program usage name |
|
| Evaluatable |
Yes |
# Standard relative humidity — relative humidity at standard conditions
Details
Relative air humidity at standard conditions.
Dependencies
To use this parameter, select the check box for the parameter Volumetric flow rate, and set the parameter Volumetric flow measurement conditions to Standard conditions.
| Default value |
|
| Program usage name |
|
| Evaluatable |
Yes |
# Energy flow rate — switching on the output port for measuring energy consumption
Details
Select this check box to have the sensor measure energy consumption.
Selecting this check box opens the φ output port.
| Default value |
|
| Program usage name |
|
| Evaluatable |
No |
# Water vapor mass flow rate — switching on the output port for measuring the mass flow rate of water vapour
Details
Select this checkbox to have the sensor measure the mass flow rate of water vapour.
Checking this box opens the Mw output port.
| Default value |
|
| Program usage name |
|
| Evaluatable |
No |
# Trace gas mass flow rate — switching on the output port for measuring the mass flow rate of impurity gases
Details
Select this checkbox to have the sensor measure the mass flow rate of impure gases.
Checking this box opens the Mg output port.
| Default value |
|
| Program usage name |
|
| Evaluatable |
No |