electricalperson
Senior Member
- Location
- massachusetts
can anybody with PV experience help me with this? I am having trouble understanding how too properly lay out PV panels. Basically for example, PV panels are on a flat roof and tilted. The book explains how to lay it out but it seems to be a little over my head. They are talking about solar altitude angles, solar azimuth angles, array azimuths and profile angles. It seems complicated and i do not understand it.
Also when they talk about Latitude, are they talking about latitude like on a map?
here is the text from the book.
"An array consisting of multiple rows of tilted modules is to be installed on a flat rooftop at 40 degrees N latitude. The rows must be spaced to avoid shading each other between 9 am and 3 pm during the winter solstice. At these times, the solar altitude angle is 14 degrees and the solar azimuth is 42 degrees. Also, due to the orientation of the building, the rows are to be installed facing 10 degrees west of due south. Therefore, the azimuth angle between the solar azimuth and array azimuth is 52 degrees at 9 am (42 degrees + 10 degrees) and 32 degrees at 3 PM (42 - 10) Both azimuth angle circumstances may need to be calculated to determine wich has the greater effect. If the module tilt results in a row height of 1.5' then what is the minimum distance for these circumstances?"
I dont know if i am over thinking it, I had trig in school but did not do too well and that was almost 10 years ago.
The formula is d = h x cos@ / tan&
@ = azimuth angle between solar and array azimuth in degrees
& = solar altitude angle
I am taking a course and everybody in the class is confused about this stuff
Also when they talk about Latitude, are they talking about latitude like on a map?
here is the text from the book.
"An array consisting of multiple rows of tilted modules is to be installed on a flat rooftop at 40 degrees N latitude. The rows must be spaced to avoid shading each other between 9 am and 3 pm during the winter solstice. At these times, the solar altitude angle is 14 degrees and the solar azimuth is 42 degrees. Also, due to the orientation of the building, the rows are to be installed facing 10 degrees west of due south. Therefore, the azimuth angle between the solar azimuth and array azimuth is 52 degrees at 9 am (42 degrees + 10 degrees) and 32 degrees at 3 PM (42 - 10) Both azimuth angle circumstances may need to be calculated to determine wich has the greater effect. If the module tilt results in a row height of 1.5' then what is the minimum distance for these circumstances?"
I dont know if i am over thinking it, I had trig in school but did not do too well and that was almost 10 years ago.
The formula is d = h x cos@ / tan&
@ = azimuth angle between solar and array azimuth in degrees
& = solar altitude angle
I am taking a course and everybody in the class is confused about this stuff