[Equest-users] Gated Community & Roof reflectivity

[Yusuf Turab]

Thank you Nick

I have only partially understood your response on multiple shells but I
assume what you say is possible using the DD wizard. I will dig around a
bit on that one. Creating multiple files does not seem to work. I do not
understand why.

With regards to your second suggestion, Indian Green Building Council have
asked me not to waste time modeling the street lights. They asked me to use
an excel sheet to calculate the total lighting consumption by multiplying
the base case LPD of 2.4 W/Sq Mt with total area under lighting and average
hrs of usage. In the proposed case I simply have to subtract the total
outdoor lighting consumption from the overall energy consumption since it
is powered using solar. I thought it makes sense.

Thank You very much.

Yusuf


On 12 April 2012 00:34, Nick Caton <ncaton at smithboucher.com> wrote:

>  To Yusuf’s more recent question below:****
>
> ** **
>
> What you’re describing (varying the rotation/layout only with all else
> remaining constant) sounds most easily accomplished in a single file,
> within the wizard stage.  Set up your first building (ideally as a single
> shell), then create new shells by copying the first – editing the rotation
> and internal layout as necessary.  If/when you have everything set up, you
> can save multiple copies of the file and remove the shells you don’t want
> for each case to isolate to the correct building.  You shouldn’t need
> re-enter the same information twice.****
>
> ** **
>
> To something Yusuf mentioned earlier:****
>
> ** **
>
> Modeling the savings of solar street/landscape lighting can be re-stated
> as determining the energy consumption of a “non-solar equivalent.”  This is
> a lot trickier than it may seem on the surface.  Much of that complexity is
> tied up in what “non-solar equivalent” means in reality:  Dig hard at the
> cutsheets of the solar equipment in question to come up with some hard
> numbers for photometrics and runtime realities.  If you are not
> trained/familiar with photometric lighting design software you may want to
> engage someone who is to help you along the way.****
>
> ** **
>
> [image: cid:489575314 at 22072009-0ABB]**
>
> * *
>
> *NICK CATON, P.E.***
>
> SENIOR ENGINEER****
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> *From:* equest-users-bounces at lists.onebuilding.org [mailto:
> equest-users-bounces at lists.onebuilding.org] *On Behalf Of *Yusuf Turab
> *Sent:* Wednesday, April 11, 2012 1:30 PM
> *To:* Bruce Easterbrook
>
> *Cc:* equest-users at lists.onebuilding.org
> *Subject:* Re: [Equest-users] Gated Community & Roof reflectivity****
>
>  ** **
>
> Thank you. I guess I have someway to go before I have system sizing and
> unmet hours fully figured out. One more question:****
>
>    - If I want to create multiple buildings of similar type, built up
>    area and construction but different conditioned spaces, interior layouts
>    and orientations. Can I simply make a copy of the old pd2 file and simply
>    change the footprint zone and orientation in the new file? I tried to do
>    this but I cannot see the 3D model of the new building.****
>
> Does this mean every model has to be created from scratch?****
>
> Many Thanks****
>
> Yusuf****
>
> ** **
>
> On 11 April 2012 19:03, Bruce Easterbrook <bruce5 at bellnet.ca> wrote:****
>
> Auto sizing is to ball park your system.  There is no computer program
> which with the press of a button will design your building for you.  You
> have unmet hours because you have conflicts in your design. You now have to
> identify the conflicts and resolve them.  eQuest works by prioritizing the
> cooling system, hence when you have conflicts they show up mostly as
> unheated hours.  eQuest has a low default on airflow, 0.5 cfm/SF, this many
> times is a good place to start.  Depending on where you are 0.75 or 1.0
> could work better.  You can also vary the flow to different zones
> independently.  You can't put 0.5 cfm into 20 spaces from the same AHU and
> expect the heating and cooling needs of each space to be met 100% of the
> time.  Get into your sim file and figure out where the spaces are with
> large unmet hours, figure out why and start adjusting the inputs to reduce
> them.
> There is no point to average the 4 orientations, nor is it allowed, just
> LEED mumbo jumbo.  It just illustrates how the orientation of your building
> effects the energy consumption to run it.  Most modellers get a building, a
> street, a front and back with no option on orientation.  That is your base
> case.  It can be handy to illustrate design flaws if there is a large
> difference in energy consumption in different directions.  Just don't call
> it that when you are telling the architect a 20 story atrium is not a great
> idea on the north side of a building. lol.
> Bruce Easterbrook P.Eng.
> Abode Engineering****
>
>
>
> On 10/04/2012 02:53 PM, Yusuf Turab wrote: ****
>
> Hello Group****
>
>    - Why do I get unmet hours even when I select the auto size option in
>    the HVAC system? What is the point of auto sizing?****
>    - Is there a way to simulate all 4 orientations and get an average
>    result for the base case?****
>
> Thanks****
>
> Yusuf Turab
> IGBC Accredited Professional, LEED Green Associate & GRIHA Trainer
> Y T Enterprises
> 18 A, Hamsa Layout ¦ R.S Puram ¦ Coimbatore - 641002
>
> http://www.ytenterprises.com/
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> On 10 April 2012 00:54, Yusuf Turab <yusuf at ytenterprises.com> wrote:****
>
> Hello Group
>
>              I have just started working on my first energy modeling
> project. I have two questions:****
>
>    - How do I model roof reflectivity. I want to model a roof of 4 inch
>    concrete with 1 inch stucco at the bottom and top and cover the roof with
>    cool roof tiles. I am not sure how I can account for the energy efficiency
>    gains compared to base case through a high SRI roof.****
>    - I am trying to model a large gated community with 330 villas and 7
>    other common buildings. As someone suggested on this group I am modeling
>    each building type separately and using excel to come up with a total
>    energy usage. But I am not sure how to model the street lighting and
>    landscape lighting at the exteriors. We plan to use solar street lights and
>    I want to demonstrate the savings through use of solar energy.****
>
> Many Thanks
>
> Yusuf Turab
>
>
> ****
>
> On 10 April 2012 00:32, nirupama lakshminarasimhan <
> nirupamalnarasimhan at gmail.com> wrote:****
>
> I am modeling a big public school with a lot of systems and custom
> windows. The equest file we have right now is taking too long to load. I've
> tried opening it from different locations- the default equest project
> folder on C: , the public server, external HDD, etc. It is just too slow in
> "importing project data" when it opens. The last time this happened, it was
> taking too long to load the BDL file and I ended up deleting a host of
> systems and starting from scratch. All my files- the .inp, .pd2, etc are in
> the same path. I just cannot get it to work faster. I'm trying to calibrate
> the model and it is an awfully long wait for each simulation. Does someone
> have any thoughts on how I could get this to work faster? ****
>
>  ****
>
> Thank you.****
>
> Nirupama****
>
>
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