how can i design and assess a solar chimney in designbuilder?

asked 2016-05-28 04:02:43 -0600

dazzle
31 ●2

updated 2017-05-04 13:58:27 -0600

hi. currently i have been working on my thesis. i am working on Green Houses. as you know a solar chimney induces natural ventilation through the interior spaces which has a significant impact on energy consumption in summers. i am going to design and assess a solar chimney for a 2-storey building in DesignBuilder software. the solar chimney comprises 2 sections: vertically and diagonally. i have design the building and the solar chimney over DesignBuilder but i am not sure about the modelling and have some questions. for instance what activity has to be considered for the solar chimney area zone ? or what kind of CFD boundary has to be installed for the solar chimney for interior CFD? or i have problems with inlet and outlet of solar chimney which my model has 2 inlets and 1 outlet

i am looking forward to listen every tips from you.

thank you so much.

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Hi there,

I hope people see this post. I would use this information too.

Ozan Vardal ( 2019-07-02 03:16:18 -0600 )edit

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answered 2020-08-26 11:12:52 -0600

Aaron Boranian

14135 ●83 ●24 http://bigladdersoftware.com/

This isn't really an answer, but there are research papers that used DesignBuilder to assess solar chimneys here and here. They both used the CFD module in DesignBuilder to analyze the air flow within the solar chimney and adjacent zones.

In DesignBuilder, the solar chimney area should be an "Unoccupied" activity since it is an empty space where no occupants, lighting, or other internal gains are located.

Other than creating a "Hole" between the solar chimney and adjacent zone(s) that allows airflow between them for CFD simulations in DesignBuilder, I'm not sure about the CFD boundary specifics to set in DesignBuilder.

Having 2 inlets and 1 outlet would be OK if you have 2 zones adjacent to the solar chimney, each with a hole to allow airflow to enter the solar chimney. You should have only 1 outlet for air leaving the solar chimney at the top.