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 RegardsAmit Verma
Virus-free. www.avast.com
On Thu, Jan 25, 2018 at 6:00 AM, <trnsys-users-request@lists.onebuilding.org> wrote:
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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@hotmail.com>
To: trnsys_users <trnsys-users@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@tess-inc.com>
To: "TRNSYS users mailing list at OneBuilding.org" <trnsys-users@lists.onebuilding.org>
Cc: Alex moreno <alamoreno19@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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***************************
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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@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@tess-inc.com http://www.tess-inc.com http://www.trnsys.com