Decarb worked on creating multiple building performance analysis reports for the FHD Group based in
Hyderabad for their residential projects and one of them was the Hayath Nagar Villa. These reports explain
the performance of the building under various exisitng circumstances for which recommendations are given
through rigorous iterations. Results for important aspects like the indoor operative air temperature, air
flow & heat analysis and daylighting are taken and analysed giving out appropriate design recommendations
in the end.
*The following information of this project is a brief representation of the extensive report.
Indoor Operative Temperature Analysis —
Info
The data is considered for the average temperature on May 23rd for different iterations for the entire
villa. There is slight improvement in the temperature when naturally ventilated with the recommendations.
The double glazing and the internal blinds helps in preventing the direct exposure of sunlight into the
building.
*Note: The temperature in all rooms will have a good effect with the usage of blinds, curtains etc
to reduce the direct heat gain during the hotter days. Natural ventilation and AC is run in a scheduled
manner under regulated conditions to produce optimum results.
Iteration_01 - Natural Ventilation - Double glazing with internal window shading (the high reflective blinds fixed mid pane)
Iteration_02 - Natural Ventilation & AC - Double glazing with internal window shading (the high reflective blinds fixed mid pane)
|
Rooms |
NV |
Iteration-01 |
Iteration-02 |
Iteration-03 |
|
Deepu Bedroom |
36.8°C |
35.8°C |
29.1°C |
- |
|
Seenu Bedroom |
37.3°C |
36.9°C |
30.5°C |
36.0°C |
|
Amma Bedroom |
31.1°C |
30.7°C |
25.8°C |
- |
|
Spare Bedroom |
36.9°C |
36.1°C |
30.2°C |
36.1°C |
|
Guest Bedroom |
37.4°C |
36.7°C |
29.5°C |
36.4°C |
|
Family Room |
34.8°C |
34.3°C |
- |
- |
|
Dining Room |
34.8°C |
30.9°C |
- |
34.4°C |
|
Master Bedroom |
31.3°C |
30.8°C |
26.6°C |
- |
|
Living Room |
34.8°C |
34.0°C |
- |
34.4°C |
The data is considered for the average temperature on May 23rd for different options. The iteration_03 is
done for the bedrooms placed along the west in the first floor. The clearstorey windows on both sides
(west & north/south) increased the daylighting to considerably high levels which in turn raised the indoor
operative temperature. The west window was removed to reduce the amount of light entering the rooms.
*Note: The temperature in all rooms will have a good effect with the usage of blinds,
curtains etc to reduce the direct heat gain during the hotter days. Natural ventilation and AC is run in a
scheduled manner under regulated conditions to produce optimum results.
Iteration_01 - Natural Ventilation - Double glazing with internal window shading (the high reflective blinds fixed mid pane)
Iteration_02 - Natural Ventilation & AC - Double glazing with internal window shading (the high reflective blinds fixed mid pane)
Iteration_03 - Natural Ventilation - Removed the west facing clearstorey windows in Seenu, Spare and Guest Bedrooms. Few existing window sizes in the Living and Drawing Rooms have been modified.
Exterior Air Flow & Heat Analysis —
North
Wind Direction
|
Exterior
There is a good circulation of air, in and out the building through the courtyard in the ground floor. As the predominant wind direction is from West to East, there is a visible velocity drop in the East side of the building. The building becomes the barrier and changes the course of the wind. The inlet of air for the rooms placed in the East are naturally lesser than the ones in the West.
|
Hue |
||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
Velocity |
0.00 | 0.53 | 1.06 | 1.59 | 2.11 | 2.64 | 3.17 | 3.70 | 4.23 | 4.76 | 5.28 | 5.81 |
|
Pressure |
-21.63 | -18.96 | -16.29 | -13.62 | -10.95 | -08.23 | -05.61 | -02.94 | -00.27 | 02.40 | 05.07 | 07.74 |
|
Hue |
Velocity |
Pressure |
|---|---|---|
| 0.00 | -21.63 | |
| 0.53 | -18.96 | |
| 1.06 | -16.29 | |
| 1.59 | -13.62 | |
| 2.11 | -10.95 | |
| 2.64 | -08.23 | |
| 3.17 | -05.61 | |
| 3.70 | -02.94 | |
| 4.23 | -00.27 | |
| 4.76 | 02.40 | |
| 5.28 | 05.07 | |
| 5.81 | 07.74 |
Exterior air flow at different heights —
Above 5m from the ground level
At plinth level
At ground level
North
Wind Direction
|
Exterior
The images show the flow of wind at three different levels. It is evident that the air flow near the ground is stronger and the courtyard traps in the air from the gound level and releases it upward. There is a loop of air formed in the East side which limits the inlet of air to the rooms placed in the East.
|
Hue |
||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
Velocity |
0.00 | 0.53 | 1.06 | 1.59 | 2.11 | 2.64 | 3.17 | 3.70 | 4.23 | 4.76 | 5.28 | 5.81 |
|
Pressure |
-21.63 | -18.96 | -16.29 | -13.62 | -10.95 | -08.23 | -05.61 | -02.94 | -00.27 | 02.40 | 05.07 | 07.74 |
|
Hue |
Velocity |
Pressure |
|---|---|---|
| 0.00 | -21.63 | |
| 0.53 | -18.96 | |
| 1.06 | -16.29 | |
| 1.59 | -13.62 | |
| 2.11 | -10.95 | |
| 2.64 | -08.23 | |
| 3.17 | -05.61 | |
| 3.70 | -02.94 | |
| 4.23 | -00.27 | |
| 4.76 | 02.40 | |
| 5.28 | 05.07 | |
| 5.81 | 07.74 |
Daylight Maps —
Samples of the Study and Analysis done for the Living Room
North | Base case: No Shading
North | After incorporating 4 horizontal slats of 0.5m width louvres
Interior Air Flow & Heat Analysis —
Velocity, Pressure & Temperature
Temperature
Velocity
North | Living Room
The almost even sized openings in the either side of the living room is effective in drawing the wind in with a good velocity. The air flow is evenly distributed whereas the temperature is a bit lower and favourable near the ceiling opening due to the constant air exchange.
|
Hue |
||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
Velocity |
0.00 | 0.02 | 0.03 | 0.05 | 0.06 | 0.08 | 0.09 | 0.11 | 0.12 | 0.14 | 0.15 | 0.17 |
|
Pressure |
-0.05 | -0.03 | -0.02 | -0.01 | 0.00 | 0.01 | 0.02 | 0.03 | 0.04 | 0.05 | 0.06 | 0.07 |
|
Temperature |
15.58 | 16.03 | 16.49 | 16.94 | 17.40 | 17.85 | 18.31 | 18.76 | 19.22 | 19.67 | 20.13 | 20.58 |
|
Hue |
Velocity |
Pressure |
Temperature |
|---|---|---|---|
| 0.00 | -0.05 | 15.58 | |
| 0.02 | -0.03 | 16.03 | |
| 0.03 | -0.02 | 16.49 | |
| 0.05 | -0.01 | 16.94 | |
| 0.06 | 0.00 | 17.40 | |
| 0.08 | 0.01 | 17.85 | |
| 0.09 | 0.02 | 18.31 | |
| 0.11 | 0.03 | 18.76 | |
| 0.12 | 0.04 | 19.22 | |
| 0.14 | 0.05 | 19.67 | |
| 0.15 | 0.06 | 20.13 | |
| 0.17 | 0.07 | 20.58 |
To know more about this project, drop an email to: ask@decarb.in
Consultant
Decarb
Sustainability Specialist
Kavya Srinivasan
Visualization
Anto Fredric Selvaraj, Anna Kuriachan
Client
FHD Group, Hyderabad
Typology
Residence
Year
2020
