Question-and-Answer Resource for the Building Energy Modeling Community

Negative and positive values of Solar radiation during night

asked 2016-01-06 11:57:49 -0500

Durr
103 ●1 ●3

updated 2020-01-20 13:36:16 -0500

__AmirRoth__

4436 ●5 ●17 http://bleedinggreenna...

I have some actual weather data that contains global solar radiation values. I have noticed that it has positive and negative values at night time, please see below. Should it be zero during night time or I am missing something?

P.S: The unit is wrong for global solar radiation.

Weather_filw

edit retag flag offensive close merge delete

add a comment

1 Answer

Sort by » oldest newest most voted

answered 2016-01-07 09:26:55 -0500

Archmage

7185 ●3 ●11

It probably should be zero but it is normal to have some small (depending on what the units really are) noise in the sensor reading. If this data were used in EnergyPlus it would be ignored when the sun's calculated position is not actually above the horizon.

edit flag offensive delete link

add a comment

Your Answer

Please start posting anonymously - your entry will be published after you log in or create a new account.

Add Answer

Careers

Question Tools

1 follower

Stats

Asked: 2016-01-06 11:57:49 -0500

Seen: 3,521 times

Last updated: Jan 07 '16

Site design and logo: Copyright © 2015 Big Ladder Software LLC. All rights reserved.
The Unmet Hours and Big Ladder names and logos are trademarks of Big Ladder Software LLC.
User contributions licensed under the Creative Commons Attribution Share Alike 3.0 License.

Negative and positive values of Solar radiation during night edit