Different roof and floor.

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Hi

I have 2-storey building. The 1st storey in a plan is not like the 2nd one. That's why I created 2 shells (one above the other). For the 1st storey I have created a roof (because part of a ceiling is outside the building). And for the 2nd storey I have created a floor. Parameters of the roof of 1st story and the floor of the 2nd story are different! During the calculation the eQUEST will calculate Heat Flux through the ceiling/floor.
How eQUST calculate it if ceiling of the 1st storey is not the same as the floor of the 2nd storey?
If air condition in 1st and 2nd story same, this question not so important, but if condition has big different - this question is very actual!

Sincerely yours,
Mikhail Samoletov

MeDBeDb's picture
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Bruce Easterbrook's picture
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I always use the roof and floor designation in the wizard of below conditioned space and over conditioned space. And then any area that is not directly under the second floor I make it a separate shell with the appropriate roof. I suppose either method would work, but if you have a lot of spaces it could become tedious having to go through the construction of each one individually.

Charles Land's picture
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Another option is to save your model with a diff name, go into the wizard of your new model and create two zones, one for the area below the second shell and one more for the surrounding area. Set the HVAC system to create a system per zone so the program will automatically create two plenums and associated roofs. Set mode to detailed, copy the two plenum zones, spaces (and associated walls and roofs), and polygons from the new model and replace the plenum in your original model with the new plenums once the original model is in the detailed edit mode. Then, delete the roof of the plenum under the second shell.

This only works if your original model has plenums, and only one plenum per floor. If you have a simple shape or only a few zones, this may be over-kill. But, if your footprint has a lot of vertices or you have a lot of zones that would otherwise need to be broken up, this method may be a time saver.

Jeremy

Jeremy McClanathan's picture
Joined: 2011-09-30
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Even better would be to learn how to add/delete roofs in the DD edit mode so
that you don't have to go through any gyrations. It's not that hard to do.
It's something that I teach people who do classes on line with me. Let me
know if you are interested.

Carol

2010/10/29 Jeremy McClanathan

--
Carol Gardner PE

cmg750's picture
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I also ascribe to the method of deleting redundant roofs post-wizard...

On a related note - I recently noticed the option to define distinct roof/wall constructions in the wizards for each zone within a single shell (this may or may not be new to 3.64?)...? The pull-downs for this are in the second shell DD wizard screen after clicking the zone characteristics button.

Has anyone played with this?? If it's possible to define zones with/without roofs in that visual interface that may be a more time-efficient method than doing it post-wizards, and particularly useful for those "wizard-bound" studies that are necessary sometimes due to time constraints.? It's something on my to-do list to explore, but I'd like to hear if anyone has used this feature successfully for such a purpose =).

NICK CATON, E.I.T.

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I haven't played with 3.64 much yet do to ongoing projects, but I did notice this.

Charles Land's picture
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I have found that this option is very helpful when creating sloped roofs (sometimes the architect is not happy until the building model looks exactly like the building). ?

Otto Schwieterman's picture
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