[Bldg-sim] MarcoFlow and ApacheHVAC coupling

Sat May 25 02:57:55 PDT 2019

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
>
>
>
> [image: 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
> <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
> https://www.researchgate.net/profile/Karol_Bandurski
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