[Bldg-sim] differences between energy simulations programs

[Paul Grahovac]

Just what is on the shelf at the University of Kansas School of
Engineering.  I was just surfing, so did not take notes.

-----Original Message-----
From: Chris Yates [mailto:chris at zed-uk.com] 
Sent: Wednesday, March 24, 2010 2:43 PM
To: Paul Grahovac
Cc: Eurek, John S NWO; Peterson, John (EYP/HP CFS);
<bldg-sim at lists.onebuilding.org>
Subject: Re: [Bldg-sim] differences between energy simulations programs

Erm, what passive solar books have you read?

Basically a layer of insulation (carpet) will reduce startup loads  
when the thermostat switches from, say, 15 degC setback to 21. Trane  
(although i cannot speak of the quality of its algorithms) is probably  
right.

It may be better to be uncarpetted if your heating doesn't have a  
setback. You don't get any startup heating load spikes then.

Sent from my iPhone

On 24 Mar 2010, at 15:36, "Paul Grahovac" <paul.grahovac at prosoco.com>  
wrote:

> FYI, another comment on TRANE Trace 700:  the modeling engineers I  
> hired
> told me, after consultation with TRANE, that exposed interior concrete
> floors, when modeled against the ASHRAE baseline of carpeted floors,
> showed a reduction in the cooling load, but an increase in the heating
> load.  An increase in the heating load was contrary to my reading in
> passive solar books.  I used a simplified simulator for lay people,  
> and
> it showed exposed interior concrete floors improved cold-weather
> performance over carpeted concrete (HEED, www2.aud.ucla.edu/heed).
>
> I have since heard that TRANE does not model thermal mass well.  I  
> have
> also not been able to find anyone with experience modeling the thermal
> mass of interior exposed concrete floors using any simulation tool.
>
> Paul Grahovac, LEED AP
> PROSOCO, Inc.
> 785-830-7355
>
> -----Original Message-----
> From: bldg-sim-bounces at lists.onebuilding.org
> [mailto:bldg-sim-bounces at lists.onebuilding.org] On Behalf Of Eurek,  
> John
> S NWO
> Sent: Wednesday, March 17, 2010 3:32 PM
> To: Peterson, John (EYP/HP CFS); bldg-sim at lists.onebuilding.org
> Subject: Re: [Bldg-sim] Discrepancy between Equest & Trace 6.2
>
> John,
>
> It is like buying a car.  Do you want a truck, manual/automatic,
> something
> fast.......  You are asking for information overload.  If you know
> exactly
> what you want it may be easier for us (in this list) to help guide you
> to the
> best option.
>
> I also was once curious and found the link below.  The end of the  
> paper
> has
> charts comparing different features.
>
http://apps1.eere.energy.gov/buildings/tools_directory/pdfs/contrasting_
> the_c
> apabilities_of_building_energy_performance_simulation_programs_v1.0. 
> pdf
>
> Another sight.
> http://www.wbdg.org/resources/energyanalysis.php
>
>
> I use Trace 700 (v6.2.4).  Why? Because the first, second and third
> company I
> worked for used it.  It is good for running loads, but so-so for  
> energy
> modeling.  Also I have never used anything else.  I have looked at
> equest and
> DOE, they both look like learning a completely new programming  
> language.
>
>
> I wouldn't mind hearing other people's brief views of the programs  
> they
> use.
> Equest, DOE, HAP, ect.
>
>
>
> John Eurek LEED AP
> Mechanical Engineer,
> US Army Corps of Engineers
> Omaha District CENWO-ED-DA
> 1616 Capitol Avenue
> Omaha, NE 68102
> Phone: (402) 995-2134
> email: john.s.eurek at usace.army.mil
>
>
> -----Original Message-----
> From: bldg-sim-bounces at lists.onebuilding.org
> [mailto:bldg-sim-bounces at lists.onebuilding.org] On Behalf Of Peterson,
> John
> (EYP/HP CFS)
> Sent: Wednesday, March 17, 2010 2:03 PM
> To: bldg-sim at lists.onebuilding.org
> Subject: [Bldg-sim] Discrepancy between Equest & Trace 6.2
>
>
>
> Has there been any information released on the differences between
> energy
> simulation programs?  We have a bid requirement with a certain
> percentage
> listed and we have been asked to address the differences between the  
> bid
> model and the newly proposed model.
>
>
>
> Thanks in advance -
>
> John
>
>
>
> John Peterson, PE, LEED AP
>
> HP Critical Facilities Services delivered by EYP
>
> 6600 Rockledge Drive, 4th Floor
>
> Bethesda, MD  20817
>
> cell: 202-731-5835
>
>
>
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