Thermal Mass

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The thermal mass consists internally of a rectangular arrangement of cubes. Inside these cubes the temperature is considered as constant. You can adjust the number of division on the edit mask. The heat flow between the several cubes takes place with the ‘inner conductivity’ that has to be adjusted as well. You can supply power to the thermal mass by a heating or you can cool it by specifying a negative heating power. The thermometer is used to detect the temperature.

The model which is used for the thermal mass is the simplest one that gives quite realistic results. It just considers the heat capacity and the heat conduction. As the energy transport mainly happens by convection in reality which would be quite costly to simulate, an effective value has to be specified for the conductivity that can only be determined by trial. It has, like so often in TrySim, never been our aim to recreate physical processes in detail but to reduce them to the essential part that is important for the PLC programmer.

With the button reset you set the thermal mass back to the environment temperature on the edit mask. You can also give the reset a push by the PLC with the help of a word poke. If the value 1 is poked the thermal mass will be set back. If you select ‘reset to poke’ on the edit mask of the poke and you keep the reset value of zero you will only have to set the LSBit of the word to ‘1’

for the reset, e.g. from MW 1200 the bit M 1201.0.

See also:

Static elements of simulation

Tabsheet: Thermal elements