SunPosition

SunPosition image

Calculates time series of sun angles (such as solar altitude and solar azimuth) for a given location and outputs them as text files that can be imported into spreadsheets and solar energy analysis programs. Sun Position is highly customizable: you can have it calculate angles for one specific day, once a month for one year, once a week, daily, etc., and in a given day calculate the angles once a day, hourly, every 15 minutes, etc. Its primary purpose is to assist architects and solar designers perform energy analysis calculations. Screen Shots

Keywords

solar angle design, solar altitude, solar design

Validation/Testing

N/A

Expertise Required

None required.

Users

Several dozen regular users in building and alternative energy fields, several hundred occasional users in various fields.

Audience

Architects, passive solar designers, PV and solar thermal energy system designers.

Input

The user inputs the geographical location, the frequency of the data desired, and the output format desired; the program has a graphical user interface.

Output

The output is text files consisting of tables of sun angle data; the specific sun angles, format of the data, etc. is specified by the user.

Computer Platform

Web

Programming Language

Javascript

Strengths

Best for people performing analyses of buildings or solar energy systems over several months or years who need to know solar altitude and azimuth angles for their analysis.

Weaknesses

While SunPosition can compute individual sun angles (i.e. at one specific time instead of throughout the year) it would be more efficient to use the SunAngle calculator for single calculations.

Contact

Company:

Sustainable By Design

Address:

3631 Bagley Avenue North
Seattle, Washington 98103
United States

Telephone:

(206) 925-9290

Facsimile:

877-684-0797

E-mail:

christopher@susdesign.com

Website:

http://www.susdesign.com

Availability

Available at http://www.susdesign.com/sunposition, distributed as shareware ($10 for personal users, $25 for commercial users).