Systems, Persons
The model describes heat and moisture release from people present in the current thermal zone. The number can vary over time, with this being described under the schedule as a percentage of the nominal or maximum number in a given hour. Please note that latent warmth linked to water vapor should not be specified as heat release, as the software takes this into account itself when calculating cooling, condensation, etc.
Heat from people is distributed equally between convective and radiative heat transfer.
There are two fields in the dialog box.
Total Load
Number of People specifies the number of people in the thermal zone. The number entered does not have to be a whole number. It may be a good idea to specify the Number of People as the maximum that can occur in the building or thermal zone (e.g. number of employees) and define the variation in the number of people present over the day, week and year under control.
Heat Gen. indicates the nominal heat emission from the given number of people and "people type", e.g. corresponding to their activity.
Moist. Gen. indicates the relevant moisture release from the given number of people and "people type".
CO2 Gen. Informs about the amount of CO2 released by the total number of persons in a thermal zone per. hour.
People Type
A People Type corresponding to the mean level of activity is defined in this field. The description of the people type consists of heat emission and moisture release per person.
CO2 flow from persons depends on their level of activity as:
qv,CO2 = 17 M
where
qv,CO2 is the CO2-flow, l/h,
M is the metobolism, met.
| Activity / Clothing | Dry heat [W] Bsim input | Evaporation [g/h] | Evaporation [W] |
|---|---|---|---|
| Sitting quet Naked 0,5 clo 1,0 clo 1,5 clo |
75 74 72 71 |
40 42 44 46 |
27 28 30 31 |
| Medium activity naked 0,5 clo 1,0 clo 1,5 clo |
127 124 121 120 |
115 120 123 126 |
77 80 83 84 |
| High activity Naked 0,5 clo 1,0 clo 1,5 clo |
177 173 171 169 |
192 198 202 205 |
129 133 135 137 |
Schedule defines connected sets of control and time definitions. It is possible to specify several schedules, allowing different day variations to be defined at different times of the year. If the building model is a school, for example, one of the schedules can be for holidays, when the people load might be 0.
People load control is of the day profile type. This means that a day profile specifying the percentage variation in the load over the day within the relevant time definition has to be defined for each of the schedules entered.
The time definitions therefore indicate different periods of the year for which different control actions (day profiles) are to be specified.
See also:
Tab Schedule
Tab DayProfile
Tab Time