[esp-r] Re: 1) Bi-directional Doors in Horiontal surfaces2)Dummy-nodescheme

[Hensen, J.L.M.]

In my opinion, you shouldn't use a bi-directional flow large opening in
a horizontal position. It is totally out of the theoretical scope of the
model. The results are more than likely to be meaningless.
You can use multiple one-way flow openings instead.

Jan

-----Original Message-----
From: esp-r-bounces at lists.strath.ac.uk
[mailto:esp-r-bounces at lists.strath.ac.uk] On Behalf Of Oliver Bucks
Sent: Wednesday, September 13, 2006 9:56 AM
To: esp-r at lists.strath.ac.uk
Subject: [esp-r] Re: 1) Bi-directional Doors in Horiontal
surfaces2)Dummy-nodescheme

Jake,

I'm not an expert, but I think I have overcome this problem when
simulating big 
trombe walls. The delta H should be precisely that between the nodes....
eg, a 
horizontal skylight with an exterior node @ 0.5m above the skylight, and
the 
zonal node @ 1.5m below the skylight, the delta H would be 2m and
-2m.....

I might be wrong though

Olli Bucks

----- Original Message ----- 
From: "Jake Zwart" <jake.zwart at sympatico.ca>
To: <esp-r at lists.strath.ac.uk>
Sent: Tuesday, September 12, 2006 9:10 PM
Subject: [esp-r] 1) Bi-directional Doors in Horiontal surfaces 
2)Dummy-nodescheme


> Two questions:
>
> 1) I have heard of a trick using bi-directional door components in
horiontal
> surfaces.  In fact this is mentioned in the FAQ regarding atriums.
However
> the input data for using a bi-directional door assumes it is in a
vertical
> surface because it asks for the height difference between the base of
the
> door and the center of both zones which it seperates.  I looked up
Hensen's
> thesis and the door component seems to have these assumptions built
in.  So,
> how can I implement a bi-directional door component between vertically
> stacked zones in my atrium?
>
> 2) I am using the dummy node scheme for my window controls as follows:
>
> I am implementing a control strategy for opening and closing window
with two
> separate controls in series.  The controls are:
>
> 1. When the indoor temperature exceeds a set temperature, say 20 C the
> windows will open.
> 2. When the ambient temperature exceeds the indoor temperature, the
dummy
> windows
> will close to prevent convective heating.
>
> When I run the simulation, the dummy nodes stays at a constant 20?C
(the
> temperature which I set the node to for the start of the run).
> Interestingly, although the dummy nodes stayed at a constant 20 C,
interior
> temperatures did drop below 20 C as a result of (what looks like)
> ventilation.
>
> Now, it seems to me that the dummy node should be a calculated node
and not
> following some other node temperature.  Say for example that the dummy
> follows the ambient, then, when the dummy window is open but the
window
> between the dummy to outside is closed, the zone will still interact
with
> outside.  Now say that the dummy follows the interior node/zone
temperature.
> In this case when both windows are open, all incoming ventilation air
will
> be no help since it will be at the interior node/one temperature
already.
>
> How can I ensure that the dummy node is a calculated temperature and
that
> the dummy node scheme will work properly?
>
> Thanks,
>
> Andrew Zwart
>
>
>
> -----Original Message-----
> From: esp-r-bounces at lists.strath.ac.uk
> [mailto:esp-r-bounces at lists.strath.ac.uk]On Behalf Of Jon Hand
> Sent: Saturday, 09 September, 2006 11:58
> To: kostas ordoumpozanis
> Cc: esp-r at lists.strath.ac.uk
> Subject: [esp-r] Re: tutorial help
>
>
>
> The best current tutorial for ESP-r is the ESP-r cookbook
> which is available on the ESRU web page publications or
> as part of the ESP-r source distribution.
>
> The browsing function is somewhat old and is probably
> trying to invoke netscape.  There are quite a few useful
> resources on the ESRU web page which can be invoked
> manually via your favorite browser.
>
> -ESRU
>
>
> -----Original Message-----
> From: esp-r-bounces at lists.strath.ac.uk on behalf of kostas
ordoumpozanis
> Sent: Sat 9/9/2006 12:10 PM
> To: esp-r at strath.ac.uk
> Subject: [esp-r]  tutorial help
>
> Hi. I am trying to launch the tutorial button on project manager and
after
> it shows the message "Starting  Browsing..." it does nothing.  Any
answer to
> that.
>
> Thanks
> Ordoumpozanis Kostas
> Greece
>
>
>
> _______________________________________________
> esp-r mailing list
> esp-r at lists.strath.ac.uk
> http://lists.strath.ac.uk/mailman/listinfo/esp-r
>


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