Ecotect AssignmentBarrio 2: Poble Nou, Besos, La Pau

_The task was to use the Ecotect as an environmental analysis tool to calculate some basic  factors which may help to design a sustainable environment friendly urban environment.   

_ The calculation was performed in a small part of the given barrio to reduce calculation time.

_ The barrio was calculated in terms of the following factors:

‐ Displaying of Shadows and Overshadowing(simple shadow diagrams, shadow range diagrams, etc)

‐ Solar Analysis(on large surfaces, on subdivided surfaces, on a grid)

Spatial Visibility Analysis and‐ Spatial Visibility Analysis and

_Wind analysis.

The Process__Importing the rhino filea small area of the barrio was chosen in the rhino file and the it was_ a small area of the barrio was chosen in the rhino file and the it was 

exported as a DXF file._ the dxf file was dragged in ecotect, the zone name was selected by the layer original name, (as our rhino model was in mm so the scale was not changed) and then it was opened as new.

_ after having the file in ecotect, first we had to run the command “ merge coincident triangles” and then “merge coincident  polygons” to get a clear and lighter model to work on._ after importing the file the climate data for Barcelona Spain was chosen.

_ two different material with two different colors were chosen for the buildings and the groundbuildings and the ground._ after importing the file the climate data for Barcelona Spain was loadedTo get the longitude and lattitude.

_ Display of Shadow and over shadowing_simple Shadow diagram

Daily Sunpath_1st the shadow pattern was viewed in varying time with a specific date of 1st April with the Daily Sun Path Diagram

Annual Sunpath_then the Annual Sunpath diagram was observed in different days of the months which was more expressed in the animation option.p p

Shadow range DiagramShadow range Diagram_the shadow range option was applied to get the overall view of the shifting shadow pattern at a time._ the shadow range can be seen with varying time and with varying months.

Shadow range Diagram

_the shadow becomes darker from day to night._ and the shadow becomes more wider with the cange of month.th h d i ll h th i i hi h iti d it id_ the shadow is smaller when the sun is  in higher position and its wider 

when the sun is in lower position.

shadow range diagram in April_In April the shadow range becomes shorter than the colder months_In April the shadow range becomes shorter than the colder months.

shadow range diagram in Septembershadow range diagram in September__In september the shadow range becomes more longer and spreading than the warmer months of the year because of the sun position.

Sunpath Diagram

_this diagram is used to show the strength of the radiation by the sun varying  with its movement through the yearits movement through the year. _ As it can be seen in the scale, its most intense in yellow parts and goes down from orange to red  to blue. The intensity is well described by the gradiation in the scale.

_ Solar Analysis

_on Large Surfaces

some surfaces are tagged to get the shadow only on that surafaces during_ some surfaces are tagged to get the shadow only on that surafaces during different times of a day._ the following images are showing the shadow pattern only on the taggedsurfaces in two different times of a day: at 9 am and 5pm in 1st April._ from this analysis we can know which surface remains more cooler throughout the daythroughout the day.

Shadow pattern at 9 am on 1st April

Shadow pattern at 5 pm on 1st April

_ Solar Analysis

_on Large Surfaces

to get the different amount solar radiation in different facades, some _to get the different amount solar radiation in different facades, somewalls were chosen. Then we put the SOLAR ANALYSIS command under calculation._ this process is very useful to compare the orientation of one surface to another to determine the most comfortable one.

_Solar Analysis on Subdivided Surfaces_ to get the solar analysis on the

surface of the buildings, theselected surfaces weresubdivided into a grid surface,after checking Surface Normals.then we ran the solar analysiscommand using the CumulativeAnalysis only for the selectedwalls.

_ this is a very usefull process ofgetting the overall solarradiation on facades to placesolar panels.

_ by this the orientation of thef d b l d t i dfacades can be also determinedeven before building.

_images showing theSolar Analysis on Subdivided surfaces

_Solar Analysis using an Analysis Grid_Solar Analysis is done by using an

Analysis Grid. The analysis grid was modified manually to get a 3d l i3d analysis.

_the images are showing the variation in solar radiation with varying heights in between the buildings.

_ the radiation is getting higher with the height.

_ the radiation in  spaces right beside the buildings are less than the spaces far from the buildings. 

Images showing different amount of radiation in 3d contour

Image showing different

amount of radiation in plan

_ this process is very important to 

get the amount of radiation in 

spaces between the buildings.

Images showing different

amount of radiation using 

Volumetrics:

_Spatial Visibility Analysis

the visibility analysis was done addressing two issues:

_ analysis of a selected surface using an analysis grid.

_ analysis of access to views through the windows of a building.

_Spatial Visibility Analysis using an Analysis Grid for a selected surface

this process is useful to get the possible visual accesses towards a particular_ this process is useful to  get the possible visual  accesses towards a particular façade or a building in a particular site.

_this image is showing the changing values of visibility of each points of the contour with the variation in color in relation with the scale.

_ Visibility Analysis through windows using a Grid inside a building

_ this process is useful to determine the number and position of windows forgetting particular views.

_ one building of our barrio was chosen with its windows. The windows weredrawn by pressing “Insert” command. the window was then arrayed in y and zdirection to get the position of the windows on the whole façade.

_ an analysis grid was made inside the building to get the changing amount ofvisibility from the façade in front of the windows.

_Wind Analysis_ wind analysis is important to

Locate the high and low speedareas within a barrioareas within a barrio.

_ this can help us to determinethe orientation of a newbuilding in a sitesurrounded by existingbuildings in terms of microclimateclimate.

_ this can be also potentiallyused to harness windenergy by locating highspeed area

_ we created a 3d analysis gridto have enough space toto have enough space toperform the wind analysis.

_ for this we had to adjust the“cfd cell blockages” byselecting the option“covered in Z”

we loaded winair data and_ we loaded winair data andthen we did the calculationby clicking load output file.

_Wind Analysis showing flow vector

_images showing changing direction of flow vector with height

_images showing changing Rate of Air Flow relative to height

_images showing changing Rate of cell pressure 

l i h i h

_image showing cell 

relative to height temperature

_Analyzing graph for Prevailing Winds

_ a wind graph is made for the barrio to get the frequency and wind speed for aselected period. The lighter area represents more hour for a specific wind

dspeed.

By Saiqa IqbalMAA 2010‐2011IAAC