[TRNSYS-users] TRNSYS-users Digest, Vol 157, Issue 26
David BRADLEY
d.bradley at tess-inc.com
Mon Jan 29 07:08:33 PST 2018
Amit,
There is a component in the TESS Utility library (Type572: equipment
fouling) that was designed for this purposes. The disadvantage of it is
that you have to define the reduction in production efficiency as a
function of the dust. However, once you do the component will linearly
degrade component performance and will then account for periodic cleanings.
If you do not have access to that component you are probably best
multiplying the performance of the PV by a performance reduction factor
using an equation.
kind regards,
David
On 01/29/2018 03:17, Amit Verma via TRNSYS-users wrote:
> Hello Everyone,
>
> I am doing a project on type 94 (PV Module) . I have to find dust
> effect on PV module's Efficiency. Please suggest me how to enroll it
> with PV module .
>
>
> Kind Regards
> Amit Verma
>
>
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> On Thu, Jan 25, 2018 at 6:00 AM,
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> Today's Topics:
>
> 1. airchange between zones (Alex moreno)
> 2. Re: airchange between zones (David BRADLEY)
>
>
> ---------- Forwarded message ----------
> From: Alex moreno <alamoreno19 at hotmail.com
> <mailto:alamoreno19 at hotmail.com>>
> To: trnsys_users <trnsys-users at lists.onebuilding.org
> <mailto:trnsys-users at lists.onebuilding.org>>
> Cc:
> Bcc:
> Date: Wed, 24 Jan 2018 14:22:02 +0000
> Subject: [TRNSYS-users] airchange between zones
> Hi
>
> I have a doubt when i modeling a single family building with two
> floors,
> how i can connect the airchange between of two zones (first floor and
> second floor)
>
> another doubt is:
>
> Firstly i simulated the two floors us one zones, but now i
> simulate the
> buildign us two zones, the results of heating differ 2% respec of one
> zone building and differ cooling 10%, it is normally?
>
> regards
>
>
> Alex
>
>
>
> ---------- Forwarded message ----------
> From: David BRADLEY <d.bradley at tess-inc.com
> <mailto:d.bradley at tess-inc.com>>
> To: "TRNSYS users mailing list at OneBuilding.org"
> <trnsys-users at lists.onebuilding.org
> <mailto:trnsys-users at lists.onebuilding.org>>
> Cc: Alex moreno <alamoreno19 at hotmail.com
> <mailto:alamoreno19 at hotmail.com>>
> Bcc:
> Date: Wed, 24 Jan 2018 16:49:40 -0600
> Subject: Re: [TRNSYS-users] airchange between zones
> Alex,
>
> When you define an ADJACENT wall (or floor/ceiling) between two
> zones you have the ability to define a coupling air flow rate from
> each to the other. You can set the flow rate as a constant, as a
> scheduled value, or as an input. Type56 leaves it to you to
> determine how much air flows back and forth between the zones.
>
> The most correct way of determining the quantity of airflow is
> to use an airflow modeling tool such as TRNFlow or Type97/CONTAM.
>
> It is hard to answer your second question. The answer depends on
> what metrics you are looking at. For instance, I would be
> surprised to see the loads of the building change by 10% based on
> 1 zone or 2. However, if you are looking at consumption of energy
> by an HVAC system then it is possible, especially if you are using
> a single thermostat to control the system.
>
> kind regards,
>
> David
>
>
>
> On 01/24/2018 08:22, Alex moreno via TRNSYS-users wrote:
>
> Hi
>
> I have a doubt when i modeling a single family building with
> two floors,
> how i can connect the airchange between of two zones (first
> floor and
> second floor)
>
> another doubt is:
>
> Firstly i simulated the two floors us one zones, but now i
> simulate the
> buildign us two zones, the results of heating differ 2% respec
> of one
> zone building and differ cooling 10%, it is normally?
>
> regards
>
>
> Alex
>
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>
> --
> ***************************
> David BRADLEY
> Principal
> Thermal Energy Systems Specialists, LLC
> 22 North Carroll Street - suite 370
> Madison, WI 53703 USA
>
> P:+1.608.274.2577
> F:+1.608.278.1475
> d.bradley at tess-inc.com <mailto:d.bradley at tess-inc.com>
>
> http://www.tess-inc.com
> http://www.trnsys.com
>
>
>
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--
***************************
David BRADLEY
Principal
Thermal Energy Systems Specialists, LLC
22 North Carroll Street - suite 370
Madison, WI 53703 USA
P:+1.608.274.2577
F:+1.608.278.1475
d.bradley at tess-inc.com
http://www.tess-inc.com
http://www.trnsys.com
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