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Description

Solar insolation is the amount of electromagnetic energy (solar radiation) incident on the surface of the earth. Solar insolation analysis is the study of incident solar radiation impacting the object of study (building or project). Incident solar radiation (insolation) refers to the wide spectrum radiant energy from the Sun which strikes an object or surface. This includes both a direct component from the Sun itself (sunshine) and a diffused component from the visible sky (skylight). Depending on the site chosen, it can also contain a reflected component from other surfaces in the model and the ground. The objective of the analysis is to determine the amount of radiation received on the various surfaces of the building being analyzed to identify options for installation of Photovoltaic modules. It also helps in selection of facade materials that would support better interior environmental quality while improving energy efficiency.

Inputs

The typical inputs required to undertake the analysis are:

Site Plan
Floor Plan
Roof Plan
Elevations
Fenestration Schedule and Properties
Weather data
Building Model
Building Properties

Outputs

The typical outputs generated from the analysis are graphical and tabular representations of the amount of radiation (Watt-hours) received by the object in a given period of time.

Tools & Approach

Autodesk Ecotect, version 5.6

Relationship to LEED^® Credits

Though insolation analysis does not directly satisfy any LEED^® requirement, it is connected to indirectly to the following credits

Sustainable Sites - Heat island effect for roof and non-roof
Energy and Atmosphere - Optimized Energy performance
Energy and Atmosphere - Onsite Renewable Energy

Consulting Support

If specific parameters are of interest to the design team, various iterations of design can be provided with an output of the specified parameter in graphic or table form to support design team decisions.