17 Heat Flow Measurement PIOX S70x
UMPIOX_S7V4-6-3EN, 2018-10-10 153
17.6.2 Display of the State of Aggregation
During the heat flow measurement, the state of aggregation of the medium can be displayed in the upper line by pressing
key .
display explanation
S= state of aggregation in the supply line
R= state of aggregation in the return line
GAS The medium is completely gaseous.
LIQU The medium is completely liquid.
BOIL The medium is in the phase transition.
In this case, an exact measurement of the heat flow is not possible because the proportion of the medi-
um in liquid phase in the supply line has to be known in order to calculate the enthalpy of the supply.
The critical range of water of is defined as the range ±3 °C around the boiling temperature. In the critical
range, the steam saturation enthalpy is used calculate the heat flow.
Example:
The medium in the supply line is completely gaseous. The medium in the return line is
completely liquid. A heat flow measurement is not possible.
A:S= GAS R= LIQU
426.23 kW
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