[esp-r] Re: question on "modelling Passive downdraught evaporative cooling (PDEC) with ESP-r"

[Jon Hand]

This is interesting.  I was not aware of the De Montfort group passing back changes
they made in ESP-r to implement PDEC. Perhaps they did? Is there any chance of getting that
source (after all ESP-r is published under GPL and such developments should
be made available to others in the ESP-r development community).

Any suggestions on a next step?

-Jon Hand
________________________________________
From: Diaz, Camilo [Camilo.Diaz at WSPGroup.com]
Sent: 05 March 2010 10:05
To: Georgios KOKOGIANNAKIS; Jon Hand; esp-r at lists.strath.ac.uk
Subject: RE: [esp-r] Re: question on "modelling Passive downdraught evaporative cooling (PDEC) with ESP-r"

Georgios
About 8 or 9 years ago I was part of the team who worked on a EU funded
three year research project on PDEC. As part of that a lot of ESP-r
modelling and validation against on-site PDEC facilities data was done.
It is worth you contacting the people who did the modelling at De
Montfort University.
Regards
Camilo Diaz
0207 314 4447
07713 985 845

-----Original Message-----
From: esp-r-bounces at lists.strath.ac.uk
[mailto:esp-r-bounces at lists.strath.ac.uk] On Behalf Of Georgios
KOKOGIANNAKIS
Sent: 05 March 2010 06:48
To: Jon Hand; esp-r at lists.strath.ac.uk
Subject: [esp-r] Re: question on "modelling Passive downdraught
evaporative cooling (PDEC) with ESP-r"

Many thanks Jon for your quick response.
I think that the "evaporative surface" is probably the best current
approach for modelling this. It does not seem difficult either to
implement as a special material what that paper was describing (at least
for the temperature part - not sure about the air flows). We may do that
over the summer.
I will let you know on how this progresses.

Thanks again,
Georgios


-----Original Message-----
From: Jon Hand [mailto:jon at esru.strath.ac.uk]
Sent: Sunday, February 28, 2010 2:39 PM
To: Georgios KOKOGIANNAKIS; esp-r at lists.strath.ac.uk
Subject: RE: [esp-r] question on "modelling Passive downdraught
evaporative cooling (PDEC) with ESP-r"


If the PDEC is primarily driven by the wet pad it would be useful to
consider a variant of the
wet surface controller or how about an evaporative surface as a special
material.

If you have a good idea about the amount of cool air generated you might
making a zone to
represent the air near where the pad would be and chilling it an
equivalent amount.
Buoyancy in the flow network could take care of the rest.

Is the idea below to raise the humidity of the air stream via the
humidity control?

Anyone interested in implementing a wet pad representation?

-Jon Hand
________________________________________
From: esp-r-bounces at lists.strath.ac.uk
[esp-r-bounces at lists.strath.ac.uk] On Behalf Of Georgios KOKOGIANNAKIS
[Georgios.KOKOGIANNAKIS at nottingham.edu.cn]
Sent: 28 February 2010 05:24
To: esp-r at lists.strath.ac.uk
Subject: [esp-r] question on "modelling Passive downdraught evaporative
cooling (PDEC) with ESP-r"

Hi all,

I am wondering what would be the best approach for modelling Passive
downdraught evaporative cooling (PDEC) with ESP-r, and in particular a a
PDEC tower with a wet pad?

I am thinking of modelling the tower as a separate zone, set up an air
flow network and use the ideal humidity control in the PDEC tower zone.
Would this approach be OK and what are the limitations?
There is an existing implementation of a PDEC tower component in another
building simulation program (which is described in this IBPSA 2009
paper: http://www.ibpsa.org//proceedings/BS2009/BS09_0369_376.pdf) but
we would ideally like to use ESP-r for other reasons, i.e. we need to
try and set up a CFD simulation for the zone that the incoming air is
dumped. Do you think that I should use ESP-r for this model?

Thanks very much,
Georgios
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