Question-and-Answer Resource for the Building Energy Modeling Community
Get started with the Help page
Ask Your Question
1

negative solar radiation

asked 2021-07-27 21:11:44 -0600

llfan_123's avatar

updated 2021-07-31 10:46:42 -0600

https://www.pveducation.org/pvcdrom/p...

According to this model and TMY3, solar radiation on a building wall facing south is sometimes negative. Is it reasonable?

edit retag flag offensive close merge delete

Comments

My result is for Fairbanks. Is it too special a place chosen? Or is it reasonable to have negative solar illumination?

llfan_123's avatar llfan_123  ( 2021-07-27 21:31:41 -0600 )edit

1 Answer

Sort by ยป oldest newest most voted
1

answered 2021-07-28 08:37:59 -0600

lklawrie's avatar

Are you actually seeing this in results of a run?


Linda

FIBPSA, FASHRAE http://climate.onebuilding.org - free repository of climate data for building simulation Climate.onebuilding is a FREE service not supported by any outside organization or government agency.

edit flag offensive delete link more

Comments

yes i saw it when running on fairbanks data

llfan_123's avatar llfan_123  ( 2021-07-28 10:09:48 -0600 )edit

Attach your IDF file? Did you use the TMY3 from energyplus.net or from climate.onebuilding.org?


Linda

FIBPSA, FASHRAE http://climate.onebuilding.org - free repository of climate data for building simulation Climate.onebuilding is a FREE service not supported by any outside organization or government agency.

lklawrie's avatar lklawrie  ( 2021-07-28 10:22:05 -0600 )edit

I used the formula from this, not energyplus: https://www.pveducation.org/pvcdrom/p... I used TMY3 data.

llfan_123's avatar llfan_123  ( 2021-07-28 10:30:34 -0600 )edit

Then I don't think I can help you. Not sure who wrote this formula, etc, etc.


Linda

FIBPSA, FASHRAE http://climate.onebuilding.org - free repository of climate data for building simulation Climate.onebuilding is a FREE service not supported by any outside organization or government agency.

lklawrie's avatar lklawrie  ( 2021-07-28 10:36:40 -0600 )edit

what would be the standard way of calculating the solar radiation received by a wall?

llfan_123's avatar llfan_123  ( 2021-07-28 10:48:01 -0600 )edit

Your Answer

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

Add Answer

Training Workshops

Careers

Question Tools

1 follower

Stats

Asked: 2021-07-27 21:11:44 -0600

Seen: 26,501 times

Last updated: Jul 28 '21