nFlowRate" ) in Energy Plus.
To obtain the Design Floor Rate , the Rate per Zone Floor Area Field is chosen. I couldn't find documentation on the precise equation for this.
Given the Design Flow rate equation, it is calculated at ambient pressure. Considering wind speeds and other factors.
The "ACH2m3/s-m2 Calculator" component enables the conversion from Air Change Rate (this is Air flow / Volume; NOT Air Flow * (Volume / Surface Area)) to Inflitration Rate per Area (floor area) at ambient pressure.
Consequently when using the previous calculator component consider the use of Air Change Rate at ambient pressure.
Certain standards, such as passivhaus, use ACH@50 Pa. This method is commonly denomintaed as n50
An aproximation to converting ACH@50Pa to ACH@ambient is by a factor of 20.
So a passivhaus standard (0.6ACH@50) = ACH * 20.
Therefore, if we wish to simulate the passivhaus standard the 0.6 is to be divided by 20, which results in an Rate Per Area of 0.000167. This is less than the typical value indicated in the description of the set "EPZoneLoads" component.
In addition to the Air Permeability method, there is also the air infiltration method which relies on Airflow / Surface Area of Building Envelope. The method employed in the UK also uses a pressure of 50 Pa, and is known as q50.
The equivalency between q50 and n50 is as follows:
q50 = n50 * (Volume / Surface of Building Envelope)
Hope this helps. I had to review energy plus documentation and HB code to make sense of this.
best wishes,
Mauricio
…
of the roof is getting higher results than expected (for city at north hemisphere), and higher than the south side of the (vertical) roof, (that is abnormal for the latitude).
The expected results should be like that of PVGIS:
ORIENTATION
ANGLE
PVGIS
DIVA
N
22
649
824
S
22
970
860
FLAT
0
829
867
N
43
504
525
S
43
1020
873
N
90
278
233
S
90
781
707
Can anyone guess the reason, or did anyone face this problem in the past? what do you think I should change?
Attached you may find the .gh file and the climate data file.
Thank you very much for your time.…
radius
36
48
58
67
75
82
So there is multiple file
1. This is the ghx made by Yasser for who ever needs it (Yasser if you want me to remove it i can)
2. This is the grasshopper that i made the longest lines represent the step i want to make disappear (cf the mind_mapping.jpg which shows what are the actions done)
3. This is the final result i would like to achieve (already done grasshopper + manualy but out of curiosity i would like to make it all with grasshopper !)
Thx all in advance :)…
he installation folder, Drag & drop SYNTACTIC(green one) over your grasshopper canvas.3. Close your rhino and reopen it. 4. Type GrasshopperDeveloperSettings5. Tick the Memory load *.GHA assemblies using COFF byte arrays option6. Run grasshopper and enjoy plugin…
t those low heights without being affected by the surroundings. The default low value is -20 m, which is the lower mesh you get. You can input less than that (i did -50) and still get the possibility of having the solar collectors very low.
If you want to test what i'm saying just put some buildings at the south and you'll see that the solar collection mesh will rise. At an ideal situation you want it as lower as possible. In this way you are granted to receive sun at your plot, since the neighbors are not blocking it from you.
As for the solar envelope something similar but opposite is happening. Your context is pretty much away so you can build high. The default height is 50. You can give a higher number and you'll see that.
Hope this is clear.
-A.…
- 100.
After that, I want to separate it into 5 different lists in spesific thickness.
in this case of 0-100 so it would be :
1. if the distance 0 - 20 then the thickness is 5
2. if the distance 21 - 40 then the thickness is 10
3. if the distance 41 - 60 then the thickness is 15
4. if the distance 61 - 80 then the thickness is 20
5. if the distance 81 - 100 then the thickness is 25
But, the problem is the list of distance isn't static between 0-100. It could be 5 - 250 / 3.5-175/etc.....
Could you help me how to make the expression?? Is this possible if I make one expression?
thank you.
Z.
nb: distance and thickness hasn't mathematical relation.…
Added by ZAQI FATHIS at 8:43am on November 27, 2013
he Summer in the City program, part of the Portland School of Architecture and Allied Arts (an extension to University of Oregon).
Using both Grasshopper and the Firefly plug-in, this workshop will focus on the design of innovative facade prototypes that are configurable, sensate, and active. Students will become familiar with the terminology used in interactive facade design including an overview of hardware (ie.sensors, actuators, and programmable microcontrollers) as well as software interfaces terminology. We'll learn new prototyping techniques and develop digital and physical models which can respond to a plurality of environmental and user driven forces. This workshop will take a hands-on approach, and you will walk away with the ability to build your own custom electronic circuits (using the Arduino), as well as create interactive simulations and models.
This course will primarily focus on physical computing techniques. Unfortunately, given the time constraints of the workshop, I will not be able to provide an extensive overview of the Grasshopper interface (it is suggested that participants have some familiarity with the Rhino/Grasshopper environment). There are many great online resources to get you up to speed relatively quickly if you are new to this software. This is a good place to start.
The course will be held at the School of Architecture and Allied Arts in Portland, OR. The date/times of the workshop are as follows:
Friday July 19, 5:00-7:50 P.M.
Saturday July 20, 9:00 A.M.-3:50 P.M.
Sunday July 21, 1:00-3:50 P.M.
If you are a designer, architect, or anyone who is interested in learning about the digital tools and technology trends that are revolutionizing design today, this workshop is for you. Make sure to click here to find out more about registration and enrollment in this exciting new workshop.…