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Working Principle And Installation Requirements Of Electromagnetic Heat Meter

Working Principle And Installation Requirements Of Electromagnetic Heat Meter

  • March 29,2019.

Electromagnetic heat meter is NONCON specifically for intelligent building distributed energy and heat exchange station, which can directly measure flow and cold and heat. It does not need additional flow totalizer and Pt1000. It is easy to install with low cost. The electromagnetic flow sensor is used as an electromagnetic heat meter for detecting the flow rate of the heat transfer fluid, and has the features of high precision, wide application range, and convenient and simple online calibration.


Working Principle

Hot water (cold water) supplied by a heat source flows into a heat exchange system (radiator, heat exchanger or a complex system composed of them) at a higher (lower) temperature, and it flows out at a lower (higher) temperature.During this process, heat is released or absorbed to the user through heat exchange (Note: this process includes energy exchange process of the heating system and the cooling system ).

When the water flows through the heat exchange system, the amount of heat released or absorbed by the system is calculated and displayed by the calculator, according to the flow rate given by the flow sensor and the temperature of the backwater given by the paired temperature sensor, and the time the water flow passes.

Electromagnetic heat meter formula

Q: the amount of heat released or absorbed by the system, J or kWh;

Qm: the mass of water flowing through the heat meter, kg/h;

Qv; the volume flow of water flowing through the heat meter, m3 / h;

P: the density of water flowing through the heat meter, kg / m3;

△h: the enthalpy difference of water at the inlet and outlet temperatures of the heat exchange system, J/kg;

t: time, h;

Electromagnetic Heat Meter 1


Installation Requirements

1. The pipe must be cleaned before the heat meter installation;

2. The heat meter is a precision meter, it must be careful when installing, and it is forbidden to lift the meter head and sensor wire; it is forbidden to squeeze the temperature sensor to prevent damage to the meter;

3. The direction indicated by the arrow of the heat meter sensor body indicates the direction of water flow, and theoretically, it is not allowed to reverse;

4. The front end of the heat meter pipe must be equipped with a filter of the corresponding diameter;

5. When installing the heat meter flow sensor, it shall ensure that there is at least 10 pipe diameter straight pipe sections upstream of the heat flow direction of the heat meter pipe, and at least 5 pipe diameter straight pipe sections downstream of the heat meter pipe;

6. The two ends of the heat meter must be equipped with the corresponding diameter valve, which can be separated from the heat meter for the cleaning and maintenance of the heat meter during use;

7.Installation is shown below:

Electromagnetic Heat Meter 2

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