ESP-r: Lighting
Current capabilities
ESP-r capabilities for representing lighting within models are as follows:
- Artificial lighting is modelled as a (casual) heat gain,
optionally with electrical characteristics.
- A number of controls (ideal, dimming, on/off) can be applied
to artificial lighting casual gains based on internally or externally
calculated sensed conditions.
- Daylighting is calculated via a range of internal or external
calculation engines and at several levels of resolution.
- Daylighting levels can be derived via time step by time step
links with Radiance or via the use of pre-calculated daylight coefficients.
- Daylighting supports both one and two-way data interchange (e.g. sensed
conditions can impose a change in optical properties of a zone).
The aim of these definitions is design decision support
as well as on-going research into the interplay between facade controls
and environmental performance.
Primary routines
- esrubld/casual.F - routines to determine applicable casual gains
during the simulation (for definition of casual gains see...)
- esruprj/edcasctl.F - define/edit a casual gain control.
- esrucom/ecasctl.F - read/write casual gain controls.
- esrue2r - esp-r to radiance conversions and control. e2rform.F has
transformation routines and radcmds.F has radiance commands embedded
in the routines.
- esrubld/dayfac.F - calculate daylight factors via rectangular windows.
Primary variables
- COMMON/CGCIN2 - definition of lighting zones and sensor locations
Issues arising
Run time linking of Radiance could be improved - basic self learning
algorithm could be improved.
- Use of daylight coefficients is less mature than time-step by time-step
method.
- Casual gain control should be aligned with other control mechanisms and
renamed lighting control. Assumption that set point is the illuminance
provided by artificial lights should be made clear.
- Additional scene purposes could be added to e2r module.
Last edited April 2005