Re: [EnergyPlus_Support] Simulating real settlement

In principle your buildings are contained in one building object. I.e. zones do not have to be geometrically linked, but only one building object is allowed per simulation. This implies most importantly that rotation of the building object relative to north will rotate all 4 of your "buildings". If the buildings are rotated individually for parametric studies, the geo-vectors describing the geometry will need to be changed. This is not that hard to do with help GUIs like openstudio.

The simulation plant loops only accept one mixer and one splitter pair per plant. A work around is using the waterheater:mixed objects to increase the number of plants whilst connecting them to a higher level plant object. This is currently my prefered way to model a plate water-water heatexchanger. These kind of schemes start becoming pretty computationally heavy.

Definately set this up with just 4 zones before expanding the geometry. get your systems working first.

good luck

Jean

Sent from my iPhone

On 17.12.2012, at 12:07, "marko.ignjatovic1980" <marko.ignjatovic1980@xxxxxxxxx> wrote:

Hi all,

I already asked a question about creating several buildings in one IDF and got the answer it is possible. I know how to do it, but before I enroll in this huge project I must ask few practical questions.
1. I have 4 buildings served by the same heating substation
2. Real settlement consists of four similar object described in 1.
3. Whole settlement is connected to the same DH system
4. Apartments are equipped with baseboard heaters

My questions are:
1. Is it possible to create several levels of splitters and mixers (for each building array 1+1) and one common on the level of DH system, and if so, how to model plate heat exchanger (since the boiler serving whole system is no problem)
2. If I choose that the heat supply comes from DH, is it possible to enter data from real plate heat exchangers located in heating substation
3. Can anyone suggest whether it is easier that each building array represents one IDF supplied by DH.

Idea is to link these IDFs with external optimization software (developed by my colleague) though several external files, so that output from E+ becomes input for this software, and its output will modify those external files, which will now serve as E+ input. This process will continue until some sort of optimization parameter is reached (we havent discussed this yet).
P.S. We want to see whether it is possible to create nearly zero energy settlement or carbon free by applying common retrofit measures
to whole settlement.

Thanks in advance

Marko

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