CYPETHERM. "Building" tab – Defining spaces for building energy simulation

Associated programs

CYPETHERM

Defining spaces for building energy simulation

The concepts defined for each type of building relate to internal heat gains. Depending on the type of internal heat gains present, two types of buildings are distinguished:

Habitable spaces

Habitable spaces are indoor spaces intended for use by people. For these spaces, you can specify the ventilation rate, the installed lighting power, the occupancy and activity levels, and the installed power of the internal equipment.

Each of these concepts can be defined by a nominal value and a schedule, which adjusts this nominal value throughout the year by applying a percentage. If no schedule is defined, the nominal value will be considered constant throughout the year.

The definition of habitable spaces involves setting the following parameters:

Building classification: Habitable

Ventilation (optional)
- Schedule (optional)
Lighting (optional)
- Installed light power
- Radiant fraction
- Motion to the House
- Schedule (optional)
Occupation (optional)
- Activity level
- Sensible fraction (optional)
- Radiant fraction
- Schedule (optional)
Internal equipment: In this table, you can add entries for internal equipment with the following characteristics:
- Design power
- Radiant fraction
- Latent fraction
- Type of energy vector
- Schedule (optional)

*Habitable space (project type: "Energy simulation*")

To the right of each of these concepts, there is a series of help buttons that enable the automatic import of values based on the use of the building and other parameters, drawn from the references cited in various sources:

*Minimum ventilation rates in breathing zones:* import the "Ventilation" value

*Lighting power densities*: import the "Installed lighting power", the "Radiant fraction" and the "Enclosure fraction" in the "Lighting" section

*Default occupancy densities*: import the "Occupancy" value

*Activity-representative states (occupancy)*: import the "Activity level", "Sensitive fraction" and "Latent fraction" to be imported into the "Occupancy" section

*Representative states of activity*: import the "Design power", "Radiant fraction" and "Latent fraction" to be imported for each item of "Internal equipment"

In addition, to the right of the panel is another wizard that covers the four concepts ("Ventilation", "Occupancy", "Lighting" and "Internal fittings") and provides values for the entire space. The "Space types" offered by this wizard are:

Residential
Offices
Retail
Hotel
Public attendance
Educational
Hospital
Industrial
Restaurant
Assisted living facility

Non-habitable spaces

Non-habitable spaces are indoor spaces that are not intended for permanent human occupation. Consequently, these are spaces that do not require climate control (such as a garage, a storage room or a plant room, for example). For these spaces, you can specify the ventilation flow rate, the installed lighting power and the installed power of the internal equipment.

As with habitable spaces, each of these concepts can be defined by a nominal value and a schedule, which adjusts this nominal value throughout the year by applying a percentage. If no schedule is defined, the nominal value will be considered constant throughout the year.

The definition of non-habitable spaces involves setting the following parameters:

Building classification: Non-habitable

Ventilation (optional)
- Schedule (optional)
Lighting (optional)
- Installed light power
- Radiant fraction
- Space fraction
- Schedule (optional)
Internal equipment
In this table, you can add entries for internal equipment with the following characteristics:
- Rated power
- Radiant fraction
- Latent fraction
- Type of energy vector
- Schedule (optional)