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negative solar radiation

asked 3 years ago

llfan_123's avatar

updated 3 years ago

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?

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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  ( 3 years ago )

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answered 3 years ago

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.

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yes i saw it when running on fairbanks data

llfan_123's avatar llfan_123  ( 3 years ago )

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  ( 3 years ago )

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

llfan_123's avatar llfan_123  ( 3 years ago )

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  ( 3 years ago )

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

llfan_123's avatar llfan_123  ( 3 years ago )

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Asked: 3 years ago

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Last updated: Jul 28 '21