[Equest-users] Query regarding PDEC ( Passive cooling ) simulation in eQuest

CleanTech Analytics jeremiah at cleantechanalytics.com
Fri Mar 16 11:16:47 PDT 2012
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What is the attached file?
Could you send it as .exe, because it did not translate..


*Jeremiah D. Crossett*
*CleanTech Analytics*
*503-688-8951*
*www.cleantechanalytics.com* <http://www.cleantechanalytics.com>


*

This document may contain valuable information proprietary to CleanTech
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*



On Fri, Mar 16, 2012 at 10:19 AM, Chalfoun, Nader V - (chalfoun) <
chalfoun at email.arizona.edu> wrote:

>  Since outlook and the university usually blocks any .exe files I have
> renamed the program CT.txt and you should rename back to CT.exe once you
> receive it
>
> Nader
>
> Check my new online energy courses http://www.hed-online.com
> --------------------------------------------
> *Nader V. Chalfoun*, Ph.D., LEED© AP, CEA
> Professor of Architecture and Environmental Sciences
> Director: The House Energy Doctor Program
> http://houseenergydoctor.arizona.edu
> Chair: Master of Science in Architecture Program
> Coordinator: Environmental Education Ph.D. Minor
> Faculty: Global Change Ph.D. Minor
> Address:  University of Arizona
>                College of Architecture and Landscape Architecture
>                1040 N. Olive St., Tucson, AZ 85721, U.S.A.
>                Phone: (520)621-6751    Fax: (520)621-8700
>
>  ------------------------------
> *From:* equest-users-bounces at lists.onebuilding.org [
> equest-users-bounces at lists.onebuilding.org] On Behalf Of Chalfoun, Nader
> V - (chalfoun) [chalfoun at email.arizona.edu]
> *Sent:* Friday, March 16, 2012 10:16 AM
> *To:* Joe Huang; Mansi Jayswal
> *Cc:* equest-users at lists.onebuilding.org; Design Builder USA
>
> *Subject:* Re: [Equest-users] Query regarding PDEC ( Passive cooling )
> simulation in eQuest
>
>   Dear Mansi,
>
> I am attaching the CoolT program for sizing Passive Downdraft Evaporative
> Cooling devices.  As Vikram said, the program is a dos based and can be
> run from windows XP.  The program calculates temperature drop, water
> consumption and other important thermodynamic values based on many
> variables including Pads evaporative cooling efficiency, thickness and
> area, tower effective height (z), discharge mode (bottom or side) indoor
> (with screens or outdoor).
>
> The only issue is that it has 8 built-in climate zones.  If your climate
> zone is not included, I have to added and re-compile the program.  If your
> climate zone has somehow close moisture and temperature data than the once
> included, you can approximate the results.
>
> Good luck with that and let me know if I could be of additional assistance
> to you.
>
> Cheers,
>
> Nader
>
> Check my new online energy courses http://www.hed-online.com
> --------------------------------------------
> *Nader V. Chalfoun*, Ph.D., LEED© AP, CEA
> Professor of Architecture and Environmental Sciences
> Director: The House Energy Doctor Program
> http://houseenergydoctor.arizona.edu
> Chair: Master of Science in Architecture Program
> Coordinator: Environmental Education Ph.D. Minor
> Faculty: Global Change Ph.D. Minor
> Address:  University of Arizona
>                College of Architecture and Landscape Architecture
>                1040 N. Olive St., Tucson, AZ 85721, U.S.A.
>                Phone: (520)621-6751    Fax: (520)621-8700
>
>  ------------------------------
> *From:* equest-users-bounces at lists.onebuilding.org [
> equest-users-bounces at lists.onebuilding.org] On Behalf Of Joe Huang [
> yjhuang at whiteboxtechnologies.com]
> *Sent:* Thursday, March 08, 2012 12:05 PM
> *To:* Mansi Jayswal
> *Cc:* equest-users at lists.onebuilding.org; Design Builder USA
>
> *Subject:* Re: [Equest-users] Query regarding PDEC ( Passive cooling )
> simulation in eQuest
>
>  Mansi,
>
> If CoolT is as Vikram describes, this might be the solution to your
> problem.  The main issue for you is to know the air flow output of the
> PDEC  in actual operations, not under design conditions, so that other
> program you mentioned for sizing the PDEC is of little help.  If CoolT is
> not able to give you air flow rates based on the ambient conditions and the
> indoor air temperature, you could try building a simple two-zone model
> (PDEC, Building) using CONTAM and then run that stand-alone to get the air
> flows between the two zones.
>
> In reference to Vikram's comment, I've said all along that the difference
> between the PDEC and a  standard DEC
> is the mechanism used to drive the air across the media - using natural
> bouyancy forces in the first case and a mechanical fan in the second case.
> Once you have the air flow rate, the PDEC is actually simpler to model
> because there's no need to model fan efficiency and heat gain, etc.  In
> fact, it just takes a single effectiveness curve, or even just a constant
> effectiveness number.
>
> Joe
>
> Joe Huang
> White Box Technologies, Inc.
> 346 Rheem Blvd., Suite 108D
> Moraga CA 94556yjhuang at whiteboxtechnologies.comwww.whiteboxtechnologies.com
> (o) (925)388-0265
> (c) (510)928-2683
> "building energy simulations at your fingertips"
>
>
> On 3/8/2012 6:49 AM, Mansi Jayswal wrote:
>
>
>  Thanks Vikram,
>
>  Could you tell me from where i can download this Software  " CoolT" ? i
> have tried to Google but did not find it anyware. I have even found one of
> your research paper. it seems you have already worked on it. it will be
> great if you could guide me.
>
>
>
> On Thu, Mar 8, 2012 at 7:37 PM, Sami, Vikram <Vikram.Sami at perkinswill.com>wrote:
>
>  Another option to look into is CoolT developed by Nader Chalfoun at
> University of Arizona in Tucson. It’s a Dos program that is based on
> empirical data that they collected from the extensive testing they did on
> Cool Towers (Passive Downdraught Chimneys).
>
>
>
> Again – I would throw in words of caution. Passive downdraught chimneys
> rely on buoyancy driven forces – something that you cannot approximate with
> a fan driven evaporative cooler or wind driven. eQUEST might be able to
> model this, but its beyond my knowledge. Also – The folks at UA (Nader
> Chalfoun & Martin Yoklic) did some testing with cool towers in enclosed
> spaces. I would try writing to them to get some feedback on issues to
> consider.
>
>
>
> I think Nader is on this list – not sure if he’s still active.
>
>
>
> *  *
>
> *Vikram Sami*, LEED AP BD+C
>
> Sustainable Design Analyst
>
> 1315 Peachtree St. NE, Atlanta, GA 30309
>
> t: 404-443-7462    f: 404.892.5823       e: vikram.sami at perkinswill.com
> www.perkinswill.com
>
> *Perkins+Will.*  Ideas + buildings that honor the broader goals of society
>
>
>
>
>
> *From:* Mansi Jayswal [mailto:ar.mansi.jayswal at gmail.com]
> *Sent:* Thursday, March 08, 2012 2:40 AM
> *To:* Design Builder USA
> *Cc:* Dahlstrom, Aaron; Sami, Vikram; equest-users at lists.onebuilding.org
>
> *Subject:* Re: [Equest-users] Query regarding PDEC ( Passive cooling )
> simulation in eQuest
>
>   Thank you all for your quick response and Information.
>
>  Is it possible that if i use PHDC software to design the PDEC system and
> simulate the same building in eQuest ??  PHDC software can give me
> the required size of the passive down draught evaporating cooling towers
> for the building.
>
>  On Wed, Mar 7, 2012 at 9:37 PM, Design Builder USA <
> jcrossett at designbuilderusa.com> wrote:
>
> You may wish to explore the free trial of Design Builder, as it has CFD,
> natural ventilation and evaporate cooling.
>
> Tho I am not sure if it can be used for your passive cooling requirement
> or not..
>
>  Best of luck
>
> On Wed, Mar 7, 2012 at 6:53 AM, Dahlstrom, Aaron <ADahlstrom at in-posse.com>
> wrote:
>
>   Mansi –
>
> We have done some schematic modeling of wind towers with Fluent, a CFD
> package as noted.
>
> Our climate didn’t justify evaporative pre-cooling.
>
> eQUEST has a natural ventilation module, which I have not fully dived
> into.
>
> I believe it requires inputs that would likely be validated by a CFD model
> – for example, I don’t think eQUEST’s natural ventilation model allows for
> evaporative pre-cooling as a temperature driver for natural air exchange in
> a space.
>
> As eQUEST models each zone as a fully mixed space, and has limited air
> transfer between zones, you may also have trouble getting the thermal
> stratification from eQUEST that would typically be needed to drive natural
> ventilation in a PDEC.
>
>  *Aaron Dahlstrom , PE, LEED® AP*
>
> *In P**o**sse* – A subsidiary of *AKF*| 1500 Walnut Street, Suite 1414,
> Philadelphia, PA 19102
>
> d: 215-282-6753| m: 267-507-5470| In Posse: 215-282-6800| AKF:
> 215-735-7290
>
> e: ADahlstrom at in-posse.com | in posse web: www.in-posse.com | akf web:
> www.akfgroup.com
>
>    *From:* equest-users-bounces at lists.onebuilding.org [mailto:
> equest-users-bounces at lists.onebuilding.org] *On Behalf Of *Sami, Vikram
> *Sent:* Wednesday, March 07, 2012 8:53 AM
> *To:* Mansi Jayswal; equest-users at lists.onebuilding.org
> *Subject:* Re: [Equest-users] Query regarding PDEC ( Passive cooling )
> simulation in eQuest
>
> Mansi,
>
> I doubt you can do this credibly in eQUEST. You really need a CFD type
> package to be able to simulate this. . A word of caution – the effort to
> develop the simulation for this is a master’s thesis in itself.
>
>  **
>
> *Vikram Sami*, LEED AP BD+C
>
> Sustainable Design Analyst
>
> 1315 Peachtree St. NE, Atlanta, GA 30309
>
> t: 404-443-7462    f: 404.892.5823       e: vikram.sami at perkinswill.com
> www.perkinswill.com
>
> *Perkins+Will.*  Ideas + buildings that honor the broader goals of society
>
>  *From:* equest-users-bounces at lists.onebuilding.org
> [mailto:equest-users-bounces at lists.onebuilding.org] *On Behalf Of *Mansi
> Jayswal
> *Sent:* Tuesday, March 06, 2012 11:25 PM
> *To:* equest-users at lists.onebuilding.org
> *Subject:* [Equest-users] Query regarding PDEC ( Passive cooling )
> simulation in eQuest
>
>   Hello friends,
>
> My name is Mansi Jayswal. I am a final year student of Masters Programme
> at CEPT University, India. By profession I am an architect. Currently I am
> doing thesis on passive cooling technique (Passive down draught evaporative
> cooling system- PDEC ). And try to identified that how much cooling load of
> HVAC system can be replaced through this system.
>
> Now my query is that is it eQuest is capable to simulate such building
> with wind tower or PHDC (PDEC ) system? If anybody knows please kindly
> reply. I have very days left for final submission and I am stuck here.
>
> Thanks
>
>  --
>
>
> Regards,
>
> Mansi Jayswal,
>
> B.Arch I IGBC AP I M.Tech in Climate Change & Sustainable Development
>
> Faculty of Sustainable Environment & Climate Change,
>
> Centre for Environmental Planning & Technology (CEPT) University
>
>
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>
>
>
> --
>
> Jeremiah D. Crossett
>
> Energy Modeling Consultant
>
> 503-688-8951
>
> www.DesignBuilderUSA.com <http://www.DesignBuilder.com>
>
>
>
>
>
>
>
>
>
>   --
>
>
> Regards,
>
> Mansi Jayswal,
>
> B.Arch I IGBC AP I M.Tech in Climate Change & Sustainable Development
>
> Faculty of Sustainable Environment & Climate Change,
>
> Centre for Environmental Planning & Technology (CEPT) University
>
>
>
>
>  --
>
> Regards,
> Mansi Jayswal,
> B.Arch I IGBC AP I M.Tech in Climate Change & Sustainable Development
> Faculty of Sustainable Environment & Climate Change,
> Centre for Environmental Planning & Technology (CEPT) University
>
>
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