Absolute Pressure, Temperature & Internal Energy Sensor (2P)

Measurement of pressure, temperature and internal energy in a two-phase liquid network.

blockType: AcausalFoundation.TwoPhaseFluid.Sensors.PressureTemperatureAndInternalEnergy

Absolute Pressure, Temperature & Internal Energy Sensor (2P)

Path in the library:

/Physical Modeling/Fundamental/Two Phase Fluid/Sensors/Absolute Pressure, Temperature & Internal Energy Sensor (2P)

Pressure, Temperature & Internal Energy Difference Sensor (2P)

Path in the library:

/Physical Modeling/Fundamental/Two Phase Fluid/Sensors/Pressure, Temperature & Internal Energy Difference Sensor (2P)

Description

Block Absolute Pressure, Temperature & Internal Energy Sensor (2P) It is an ideal sensor that measures pressure, temperature and specific internal energy in a two-phase liquid network. There is no mass and energy flow through the sensor.

Block Absolute Pressure, Temperature & Internal Energy Sensor (2P) It works in two modes depending on the value of the Measurement type parameter:

Absolute — the block is in the mode Absolute Pressure, Temperature & Internal Energy Sensor (2P) measures absolute values of temperature and pressure. The sensor contains an implicit reference node, which means that only port A is needed to measure absolute pressure and temperature, as well as overpressure.
Difference — block in the mode Pressure, Temperature & Internal Energy Difference Sensor (2P) measures temperature or pressure differences. In this mode, the unit has two input ports A and B. The measurements are positive when the values on port A are greater than the values on port B.

Five output ports are available for the output of measurement data:

Pa — absolute pressure;
Pg — overpressure;
P — pressure difference;
T — temperature or temperature difference;
U is the specific internal energy or the difference in specific internal energies.

These ports are displayed on the block icon depending on the block settings. Configure the parameters of the unit so that only those ports that are necessary for measurements in a particular model are displayed.

Ports

Conserving

# A — sensor input
two-phase liquid

Details

The two-phase liquid port corresponds to the sensor inlet. Use this port to measure absolute pressure, temperature, and specific internal energy.

Program usage name

inlet

# B — sensor output
two-phase liquid

Details

The two-phase liquid port corresponds to the sensor outlet. When performing absolute measurements, this port is hidden because the sensor contains an implicit reference node. Turn on this port to measure the relative pressure, temperature, or specific internal energy between two nodes in the model. The measurements are positive when the values in port A are greater than the values in port B.

Dependencies

To use this port, set the parameter Measurement reference meaning Difference.

Program usage name

outlet

Output

# Pa — absolute pressure, Pa
scalar

Details

The output port. Displays the result of the absolute pressure measurement.

Dependencies

To use this port, set the parameter Measurement reference meaning Absolute, check the box Pressure and for the parameter Pressure type set the value Absolute pressure.

Data types	`Float64`
Complex numbers support	No

# T — temperature, K
scalar

Details

The output port. Displays the result of the temperature measurement if the value of the parameter Measurement reference installed Absolute — the absolute temperature is measured if Difference — the temperature difference in ports A and B is measured.

Dependencies

To use this port, check the box Temperature.

Data types	`Float64`
Complex numbers support	No

# U — specific internal energy, J/kg
scalar

Details

The output port. Outputs the result of measuring the specific internal energy if the value of the parameter Measurement reference installed Absolute — the absolute specific internal energy is measured if Difference — the difference of specific internal energies in ports A and B is measured.

Dependencies

To use this port, check the box Internal energy.

Data types	`Float64`
Complex numbers support	No

# Pg — excess pressure, Pa
scalar

Details

The output port. Displays the result of the overpressure measurement.

Dependencies

To use this port, set the parameter Measurement reference meaning Absolute, check the box Pressure and for the parameter Pressure type set the value Gauge pressure.

Data types	`Float64`
Complex numbers support	No

# P — pressure difference, Pa
scalar

Details

The output port. Outputs the result of measuring the pressure difference.

Dependencies

To use this port, set the parameter Measurement reference meaning Difference and check the box Pressure.

Data types	`Float64`
Complex numbers support	No

Parameters

# Measurement reference — choosing between absolute and relative measurements
Difference | Absolute

Details

Choose between absolute and relative measurements:

Absolute — The sensor measures the values in the A port. The sensor contains an implicit reference node, which means that only one port is needed to perform absolute measurements.
Difference — The sensor measures the difference in values between two nodes in the model. When this value is selected, port B is used.

Values	`Difference` \| `Absolute`
Default value	`—`
Program usage name	`type`
Evaluatable	No

# Pressure — enabling the output port for pressure measurement

Details

When this option is selected, the output port Pa, Pg or P opens, allowing pressure measurement.

Default value	`true (switched on)`
Program usage name	`measure_pressure`
Evaluatable	No

# Pressure type — the choice between absolute and excessive pressure
Absolute pressure | Gauge pressure

Details

Choose which pressure the sensor measures — absolute or excessive:

Absolute pressure — The sensor measures the absolute pressure at port A. When this option is selected, the Pa port is displayed on the block icon.
Gauge pressure — The sensor measures the overpressure at port A. When this option is selected, the Pg port is displayed on the block icon.

Values	`Absolute pressure` \| `Gauge pressure`
Default value	`Absolute pressure`
Program usage name	`pressure_type`
Evaluatable	No

# Temperature — enabling the output port for temperature measurement

Details

When this option is selected, the T output port opens, allowing temperature measurement.

Default value	`false (switched off)`
Program usage name	`measure_temperature`
Evaluatable	No

# Internal energy — switching on the output port for internal energy measurement

Details

When this option is selected, the output port U opens, allowing internal energy measurement.

Default value	`false (switched off)`
Program usage name	`measure_internal_energy`
Evaluatable	No