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Re: [EnergyPlus_Support] Re: Internal Partitions do not participate in blocking solar radiation?

Thank you all for your comments and taking the time to look into this.

Linda, yeah I understand that a shading surface will not interact participate in the internal heat but I am looking to mimic a shading surface indoors that only blocks the beam solar radiation from hitting the wall (1 wall in particular) so I can pinpoint how big of a difference the beam solar radiation makes in 'charging/discharging' of PCM in that particular wall.

Could you think of any other way I could accomplish this. I also tried creating a "fictitious" material with high conductivity, low specific heat capacity, minimal thickness and placed it at the sole material that made up the interior partition. I was hoping that this material would not participate in the heat balance other than just block the direct beam solar radiation from 'hitting' the wall. Unfortunately that did not work well either.

Any thoughts/comments is deeply appreciated.

Thanking you,
Niraj Poudel
Clemson University

On Fri, Jun 14, 2013 at 4:01 PM, Jean marais <jeannieboef@xxxxxxxxx> wrote:

FullExterior mode works like this...after having calculated what energy is passed by the window, EVERYTHING falls on the FLOOR, and what is reflected by the floor (emissivity), is EVENLY AREA WEIGHTEDLY distrubuted to ALL the surfaces of the zone including interzone surfaces.

There's a bit of info in the io ref about interzone surfaces, which is what you are using. The way they "see" the other surfaces in the zone is a point to look up. Radiation can only be exchanged from one side of the surface from what I can remember...i.e. it is very important which way it is facing.

We were thinking of using them to employ chilled ceiling panels...

e+ support said "A floating surface also won't necessarily be properly resolved in terms of interior solar distribution and internal thermal radiation. ", but as PCMs and InternalSource can't be placed in InternalMass surfaces, this is your best bet.

And yes, then you need convex zones to use FullInteriorAndExterior.

Niraj Poudel, Architectural Engineer.
PhD student, PDBE Program.
Clemson University, Clemson, SC.


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