In order to determine the thermal load by persons, the maximum load and the course of the day ("day profile") must be specified.
The maximum load is specified in relation to the area of the room so that the same profile can be used for different rooms. The person load is entered in m²/person. The applied load consists of a convective and a radiant part (in %, both parts add up to 100%).
For the person profile the convective part has to be entered. If the exact convective or radiant portion is unknown, a ratio of 50/50 is assumed. The convective part has a direct effect in the room and the radiating part has a time-delayed effect. The resulting heating or cooling load will therefore also shift. It will increase or decrease depending on other loads. It is therefore important to know the exact convective or radiant component. In the case of the person load, the degree of activity must also be selected from a list, because a seated person, for example, gives off much less heat than a person doing heavy physical work. The resulting thermal load by persons depends on the temperature set point.
If the option "Consider air humidity" was selected in the project options, the resulting water vapour formation by persons as a result of sweating and breathing depending on the temperature is also calculated according to VDI 2078. Otherwise only the dry load is considered.
The day profile (in this case daily occupancy) defines what percentage of the maximum load is fed to the room in the respective hour of the day. An office, for example, will differ significantly from a hotel. The percentage share is entered in the input field at the corresponding hour. The thermal load in sequence of the persons can be seen in the results under "Thermal loads".
