[Bldg-sim] IDA ICE experience

Chris Yates chris.malcolm.yates at gmail.com
Fri Feb 23 14:57:07 PST 2018


Christopher,

In terms of geometry, the input methodology has some good points, even if
it appears a bit clunky. The latest version 4.8 has some improvements. Ida
also has very good IFC import capability. I can usually re-use about 70%
from unaudited Revit models, more if the model is well constructed.
Sketchup can be input as well.

The user interface for generating building models is friendly and
uncluttered. IDA rarely get's a "facelift". This is a good thing - it's
evolving. It still uses the floppy disk icon! It handles data predictably
and robustly without any "volatile" relationships between data inputs. The
underlying component models can be accessed if using the expert version
(i.e. the maths that describe objects such as zones, coil's, boreholes,
etc). There's a schematic modelling interface enabling the user to build
sub-system models and hack into details in larger building models. It has
an ice rink and swimming pool module. I understand this was used for
calculations on the ice making facility at the new Stadium in Stockholm
(they can ice the whole pitch!). There is a 90.1 tool available.

The thing that really is unique to IDA is that it simulates plant, controls
and network airflow in a very integrated way. In fact, these three aspects
are permanently coupled. They cannot be uncoupled. This makes for a very
robust analysis. The nearest example I can think of that compares is
simulating IES with ApacheHVAC and Macroflo activated. This can quantify
air movement under both natural and mechanical ventilation combined. A
direct comparison with other software cannot be made though. Some quite
arbitarily complex systems can be made. For example, mixed mode systems
with lockout's between the VAV boxes and actuated louvres, unusual SAT
reset strategies, dual duct systems. These all simulate the coupled
controls + network aiflow + plant in a very stable manner. You don't need
to make the timestep very small to make the simulation very stable, because
the timestep varies dynamically during runtime seeking the most stable
computational solution. Waterside modelling is a bit harder but can be done
with a bit of practice.

I could go on, but it's getting late.

Chris

On Fri, Feb 23, 2018 at 8:29 PM, Jones, Christopher via Bldg-sim <
bldg-sim at lists.onebuilding.org> wrote:

> Thank you Javed,
>
> I am interested in what you say about modeling the geometry. I am a big
> fan of SketchUp for doing the geometry – works for Sefaira, OpenStudio and
> IES VE. Are you indicating that IDA ICE has a more cumbersome geometry
> modeling interface?
>
>
>
>
>
> *Christopher R. Jones*, P.Eng.
>
> Technical Specialist
>
> Sustainability & Energy
>
>
>
> T +1 416-644-0252 <%28416%29%20644-0252>
>
>
>
> 2300 Yonge Street, Suite 2300
>
> Toronto, ON M4P 1E4 Canada
>
> wsp.com
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>
>
>
>
> *Please consider the environment before printing...*
>
>
>
>
>
> *From:* Javed Iqbal [mailto:javedvit at gmail.com]
> *Sent:* Friday, February 23, 2018 1:16 PM
> *To:* Jones, Christopher <Christopher.r.Jones at wsp.com>
> *Cc:* bldg-sim at lists.onebuilding.org
> *Subject:* Re: [Bldg-sim] IDA ICE experience
>
>
>
> Hello,
>
>
>
> I have used IDA ICE sometime ago. The main advantage of IDA ICE over other
> simulation programs is implementing control sequences which is pretty
> powerful. I believe, It gives greater flexibility in modeling and
> implementing controls for passive strategies such as natural ventilation,
> double facade compared etc. 3D modeling is heck, however, due to very
> particular about own geometrical interface unlike E+ which gives various
> means to import stable geometry.
>
>
>
> This is my perception, developed while used it for short time and might
> vary compared to someone who is expert user of IDA ICE.
>
>
>
> Hope this helps!!
>
>
>
>
>
>
>
> On Fri, Feb 23, 2018 at 6:54 PM, Jones, Christopher via Bldg-sim <
> bldg-sim at lists.onebuilding.org> wrote:
>
> I am wondering about experience with IDA ICE. Some are claiming it is the
> greatest thing since sliced bread. The blurb on their website sounds
> encouraging but I am always nervous when the cost of software isn’t readily
> apparent.
>
>
>
> We are using eQuest, IES VE and OpenStudio. Are there things IDA ICE can
> to that these other tools cannot? If IDA ICE has good ice rink capabilities
> then it might be worth investigating.
>
>
>
>
>
> *Christopher R. Jones*, P.Eng.
>
> Technical Specialist
>
> Sustainability & Energy
>
>
>
> T +1 416-644-0252 <%28416%29%20644-0252>
>
>
>
> 2300 Yonge Street, Suite 2300
>
> Toronto, ON M4P 1E4 Canada
>
> wsp.com
>
>
>
>
>
> *Please consider the environment before printing...*
>
>
>
>
>
>
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> Javed Iqbal, LEED AP, CEA
> Sr. Energy Analyst
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