[Bldg-sim] Fwd: Variation in incident solar radiation on east and west surface of a building in different simulation tool

Dru Crawley dbcrawley at gmail.com
Wed Sep 24 07:53:54 PDT 2014


Are you using the same hourly weather data in eQuest, TRNSYS and
EnergyPlus?  The radiation can vary significantly.

On Wed, Sep 24, 2014 at 7:42 AM, Mayank Bhatnagar <mayank.23aug at gmail.com>
wrote:

>
> Dear All,
>
> I am doing envelope analysis of a rectangular building in eQuest. The
> building have identical parameters for all perimeter zones. The simulation
> is being done for New Delhi climate zone. The results shows that the total
> solar heat gain through glazing is more in east zone compare to west zone.
> In the result of that the total load and energy consumption in east zone is
> higher than in west zone.
>
> To verify the results, I analyzed the total horizontal and beam radiation
> incident on east and west facade. Here, the issue was started. In the
> eQuest, there always high incident solar radiation in east surface compare
> to west surface. However, the incident solar radiation on east and west
> surface in energy plus and TRNSYS have different trend from the eQuest.
> Here I am attaching graph showing variation of incident solar radiation in
> east and west facade with energy plus and TRNSYS.
>
> Any guidance, suggestions will be appreciated.
>
> 1. Variation in eQuest and TRNSYS. (Blue and green is for eQuest and;
> Magenta and brown for TRNSYS)
>
> [image: Inline image 1]
>
> 2. eQuest and Energy Plus
> [image: Inline image 1]
>
>
>  Regards,
>
> Mayank Bhatnagar
>
> Energy Analyst
>
>
>
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