EME 810
Solar Resource Assessment and Economics

2.8 Discussion Activity


I want you to question why we do all of these time conversions for solar energy in this Discussion Activity. I have already stated that we use the conversions to relate time and angles together as solar energy specialists. Now, I would like you each to contribute your questions and perspective after reading about the following topics:

  • solar time vs. clock time (What is the difference?)
  • the analemma vs. the time correction for longitude (What is the analemma in the sky representing? What is the connection between longitude and time?)
  • daylight savings (What insight have you gained about the use of daylight savings in society (useful, not so much, meh)?)
  • the role of the equinoxes and the solstices in SECS (These are key critical points in time. What makes each special?)

This discussion will take place in the Lesson 2 Discussion Activity  board in Canvas.

For your post: 

1. I would like to get your basic questions out in the open and record your reflections on relating solar time and clock time, and the steps for conversion of time.

2I value your contribution on why we are correcting time at all for the analemma or longitude--why does it even matter to solar design?

3. The equinoxes and solstices seem to be important for design considerations, and I would additionally value a contribution regarding those times during the year and the influence on SECSs like tracking systems or shading phenomena.


In order for this activity to "work," you will need to participate in this discussion on a daily basis in order to catch up on postings and contribute your own thoughts.

This is an open-ended discussion, and you may ask questions or raise your concerns with things that might still remain confusing.

Grading Criteria

You will be graded on the quality of your post and the thoughtful contributions you make to your classmates' posts. Please see the Discussion Expectations and Rubric under Orientation/Resources.

Deadline: please see the course calendar for specific due dates.