Pressure, temperature and specific internal energy meter (TPF)#

The Pressure, temperature and specific internal energy meter (TPF) block allows you to measure the values of pressure, temperature and internal energy in the nodes of a two-phase hydraulic network, or the pressure difference (temperature, internal energy) between two points of this network.

The absolute sensor has 1 port for connection to a pressure (temperature, internal energy) control point and measures the value of the parameter in this node.

\(P=P_{in}\), where \(P_{in}\) is the excess or absolute (depending on the selected parameter in the Pressure type property) pressure in the node connected to the input port of the block, [Pa];
\(T=T_{in}\), where \(T_{in}\) is the temperature in the node connected to the input port of the block, [℃];
\(u=u_{in}\), where \(u_{in}\) is the specific internal energy in the node connected to the input port of the block, [J/kg].

The differential sensor has 2 ports for connection to pressure control points (1) (temperature (2), internal energy (3)) and measures the change in parameters between these points.

(1)#\[\Delta P=P_{вх}-P_{вых}\]

where:

\(P_{in}\) – pressure in the node connected to the input port, [Pa];

\(P_{out}\) – pressure in the node connected to the output port, [Pa].

(2)#\[\Delta T=T_{вх}-T_{вых}\]

where:

\(T_{in}\) – temperature in the node connected to the input port, [℃];

\(T_{out}\) – temperature in the node connected to the output port, [℃].

(3)#\[\Delta u=u_{вх}-u_{вых}\]

where:

\(u_{in}\) – specific internal energy in the node connected to the input port, [J/kg];

\(u_{out}\) – specific internal energy in the node connected to the output port, [J/kg].

Note

One sensor can operate in several modes:

Measure only pressure, only temperature, or only specific internal energy;
Simultaneously measure combinations of available parameters.

Hint

After adding the sensor to the circuit, use the appropriate switches to configure it, including the parameters to be measured.

1. Properties#

Property	Default Value	Description	Units of measurement
Meter type: Absolute; Difference	Absolute	-	-
Pressure type: Gauge; Absolute	Gauge	-	-
Pressure	On	-	-
Specific internal energy	Off	-	-
Temperature	Off	-	-

2. Inputs and outputs#

Parameters	Input/Output	Description	Units of measurement	Port type
Input	Input	-	-	Two-phase fluid
Pressure	Output	Available when `Pressure` - `On`	Pa	Automation
Output	Output	Available when `Meter type` - `Difference`	-	Two-phase fluid
Specific internal energy	Output	Available when `Specific internal energy` - `On`	J/kg	Two-phase fluid
Temperature	Output	Available when `Temperature` - `On`	\(^о\)С	Two-phase fluid

In order to see the connection capabilities of the block, you need to go to page Description of block ports