1 / 7

Solar Radiation

Solar Radiation. Intensity of the sun varies by the clarity of the atmosphere and the angle the sun strikes the surface, called the “incident angle” More perpendicular the suns rays are to the surface, the more heat and light energy Given in units of energy per area (w/m2 or BTU/hr/ft2)

lorene
Download Presentation

Solar Radiation

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Solar Radiation

  2. Intensity of the sun varies by the clarity of the atmosphere and the angle the sun strikes the surface, called the “incident angle” • More perpendicular the suns rays are to the surface, the more heat and light energy • Given in units of energy per area (w/m2 or BTU/hr/ft2) • Sometimes quoted in energy accumulated per day or year (kWh/m2/day)

  3. Direct radiation, measured perpendicular to the sun’s rays • Diffuse radiation, measured horizontal to the surface Direct/Diffuse radiation

  4. Cloudy sky reduces direct radiation and increases diffuse radiation • From the total energy of the sun, up to 1/3 can be lost (reflected into space), about 20% reaches as diffuse radiation and the rest is direct radiation

  5. Incident solar radiation values are calculated and visualized within Revit • Hourly direct and diffuse radiation data, building geometry and time period of the analysis are taken into account

  6. Incident is the amount of energy striking a surface not how much is absorbed, transmitted or reflected back • Material properties affect the above • Solar radiaton for a specific time is valuable when finding an initial number for available energy on your site • Average incident solar radiation across the entire earth is 240 W/m2 Absorbed, transmitted, and reflected

  7. - See more at: http://sustainabilityworkshop.autodesk.com/buildings/solar-radiation-metrics#sthash.S7brDUuU.dpuf

More Related