Re: [TRNSYS-users] SDHW example TRNSYS

[BOUALAMALLAH AHMED AMINE via TRNSYS-users <trnsys-users@lists.onebuilding.org>]

COMMENT ON PEUT TRCER LE RENDEMENT INSTANTANE DE CAPTEUR SUR TRNSYS.JE DEMANDE LES ETAPES QUI NOUS LES SUIVONS.

Le Dimanche 25 juin 2017 14h43, BOUALAMALLAH AHMED AMINE <b20amine@yahoo.fr> a écrit :

Le Mercredi 21 juin 2017 3h45, Jeff Thornton via TRNSYS-users <trnsys-users@lists.onebuilding.org> a écrit :

Did you take into account the incidence angle modifiers when you calculated the efficiency?

As for the second issue, did you account for any pipe losses or pump energy gains to the fluid?  Did you look to see if the differences you're calculating are within your simulation tolerances?

Jeff - TESS

Sent from my iPhone

> On Jun 20, 2017, at 8:11 PM, Rm Chemilo via TRNSYS-users <trnsys-users@lists.onebuilding.org> wrote:
>
>
> In this attachment file, I tried to calculate hourly thermal efficiency of solar collector by using this two equation

>  and

> . But after comparing the result, why the hourly efficiency different?
>
> And also please check "Comparison Energy balance" sheet. I don't understand why q gain from solar collector has different value with qin storage. even though in the example there is no heat exchanger between solar collector and storage.
>
>
> Thank you.
>
>
> <TRNSYS EXAMPLE SDHW.xlsx>

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