With this example we are going to carry out a practical case for obtain the pattern of shadows cast on an enclosure of façade that is set back because it is a balcony, using the CE3X program. In this case the façade of the balcony is 6.54 m. long, 2.70 m free height and 2.97 m setback.
In this pattern we are going to include the own shadows thrown on said balcony, both by the two enclosures sides as well as the horizontal slab that covers it. First, explanation of the steps and, at the end, video course of shadows with CE3X for general procedure.
This example for calculating sunlight is valid both for a single-family dwelling as well as for a block dwelling. We start from a facade with a balcony whose orientation is southeast according to the following graph:
In the previous floor you can see how we have obtained the angles for the four points that are going to generate the three planes that we consider to be remote objects, are also has carried out the abatement of points 2 and 3 to obtain in true magnitude of the angles of elevation, so that the remote obstacles are defined according to the following table:
| Remote Object | Points | Horizontal angle Azimuth (α) | Angle of elevation ( β) |
| Side facade left | P1 | 41 | 22 |
| P2 | -1 | 17 | |
| Right side façade | P3 | -97 | 17 |
| P4 | -139 | 22 | |
| Roof, Slab Landscape | P1 | 41 | 90 |
| P2 | -1 | 17 | |
| P3 | -97 | 17 | |
| P4 | -139 | 90 |
With this table we already have the necessary information to be able to introduce in the program and obtain the pattern of shadows, then we go to the definition tab of shadows, so that, through the general option, we introduce the four points necessary for the definition of each one of the three polygons or remote obstacles that we want simulate.
Content menu:
Once the hatch patterns of the three planes that cast shadows on our façade, we give save pattern, then close the Patterns window shadow and we go to the definition of the thermal envelope and we associate to the southeast façade the pattern defined for the itself, as follows:
With the completion of this post, we would like you to leave your opinions regarding the consideration of shadows thrown by obstacles typical of facades, on your experience in introducing them into certificates, the doubts that have arisen in this process or Any other type of approach that you will grant opportune keep in mind.
– Added on 07/12/2013 due to comments on this post –
– Added on 07/18/2013 due to comments on this post –
If you allow me, I attach the pattern of shadows on the solar chart which I think is correct from the PM point
In the graphic below I mark the effect of the façade from P2 to the left of the sketch. If it is not checked I think it is let the sun come in from behind and behind there is the home. On the right side it is not necessary to introduce it anymore that the solar chart is already covered in its entirety.
The way I see it is the area within the rectangle seen below.
This graph tells us that the sun shines on the wall where it is finds point PM in hole defined by abscissa: azimuth -1º and -97º and ordinates: elevation 0º and 17º
The hours of real sunshine are defined by the lines of the solar chart found within said surface.
As I understand it, the blue, green, red lines... that are born and die on the abscissa axis represents the trajectory solar at different times of the year and the lines that intersect These are the hours of the day.
So, inside the rectangle marked in red we can see for each season of the year in which hours the sun shines on the façade from the center point PM. I think this describes the reality of assumption of the exercise and if it is not so, I can say that I really don't understand any of this.
From YouTube we can learn many things and, in the world energy certification, there are also good contributions. In this case we can see shadow patterns procedure overall:
From Home Repair Care we want to thank the contribution of the Submit latest documentation to Antonio Lloret and Francisco Segado for being great professionals and collaborate so that we all learn a little more every day.
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Article prepared by José Luis Morote Salmeron (Technical Architect – Energy Manager) Access to their website HERE, in collaboration with Follow us on Google+
