[Bldg-sim] MarcoFlow and ApacheHVAC coupling

Mon May 27 00:03:57 PDT 2019

Dear Chris and Neil

Thank you for your tips!

I hope it lead us to the operating model.

If you know also some reports/guidebook/webinar in this topic I would be grateful for information.

Kind regards,
Karol

From: Chris Yates [mailto:chris.malcolm.yates at gmail.com] 
Sent: Saturday, May 25, 2019 11:58 AM
To: Neil Shankland
Cc: bldg-sim at lists.onebuilding.org; Karol BANDURSKI
Subject: RE: [Bldg-sim] MarcoFlow and ApacheHVAC coupling

Just adding to Neil's comment regards crashing due to over pressurisation.  You should do some runs with various timesteps. Usually, the shorter the time step the more stable.

On 24 May 2019 16:04, "Neil Shankland" <Neil.Shankland at burohappold.com> wrote:

Hi Karol,

The trick to getting ApacheHVAC and Macroflo to work together in IES VE is the use of a flow controller set to zero at an appropriate point in the HVAC network. For your example, the HVAC network would contain a single zone where you want to add mechanical supply. The upstream side of this zone would have a flow controller set to provide the required flowrate and the downstream side would have a flow controller set to zero volume flow, on continuously. With Macroflo and HVAC both active in ApacheSim, the mechanical supply will be introduced, as defined in the HVAC network, and Macroflo will calculate what subsequently happens to that air (provided there are sufficient Macroflo openings to prevent the run crashing due to overpressurisation). Hope this helps.

Regards,

Neil 

Leeds 30-E-footer-regional.png

From: Bldg-sim <bldg-sim-bounces at lists.onebuilding.org> On Behalf Of Karol BANDURSKI via Bldg-sim
Sent: 24 May 2019 15:47
To: 'Chris Yates' <chris.malcolm.yates at gmail.com>
Cc: bldg-sim at lists.onebuilding.org
Subject: Re: [Bldg-sim] MarcoFlow and ApacheHVAC coupling

** External Email **

Hi Chris,

Thank you for your advice!

For now the issue is that we would like to do it as good as possible using IES VE.

Kind regards,

Karol

From: Chris Yates [mailto:chris.malcolm.yates at gmail.com] 
Sent: Friday, May 24, 2019 4:38 PM
To: Karol Bandurski <karol.bandurski at put.poznan.pl>
Cc: bldg-sim at lists.onebuilding.org
Subject: Re: [Bldg-sim] MarcoFlow and ApacheHVAC coupling

Hi Karol

You could try one of the "RoomAirSettings" models in E+.

There should be an example file in the E+ installation directory that can be run "out of the box". You could mess with this. Rather than coupling network airflow and hvac network these models are typically based on 1d finite elements or fixed (known) temperature gradients and don't require the zone to be split horizontally.

Best

Chris

On Fri, May 24, 2019 at 11:27 AM Karol Bandurski via Bldg-sim <bldg-sim at lists.onebuilding.org> wrote:

Dear All

My question refer to IES VE.

Do you know some description how couple Atrium MacroFlow calculation, based
on temperature stratification with flow forced by fans defined in
ApacheHVAC?

We prepare some model with students. Atrium is divided on three air zones
and MacroFlow calculate flows caused by temperature differences, but we
would like to add there also flow caused by mechanical system, e.g. inlet in
the lowest part and outlets in windows in the highest part of Atrium.

Kind regards,
Karol
--------------------------------------------------------------------
Karol BANDURSKI M. Sc.
Faculty of Civil and Environemntal Engeneering
Division of Heating, Air Conditioning and Air Protection
Poznan University of Technology
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