Page 46 - Shashwat - Restoring Green Economy

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design. When there is inadequate or Ways to Mitigate standard of sufficient lighting inside.
no fenestration, the air changes do Based on this, the gaps between the
not occur properly and the smoke SRA and PAP project developers buildings should be simulated to
from the kitchen remains stagnant should follow NBC (National check the minimum clear distance
for a longer period. The provision of Building Code) norms for the required to achieve the design sky
openings in the kitchen and towards rehab buildings without any illuminance values (Figure 2).
the corridor was observed in several discrepancies. According to NBC According to Special Publication
SRA projects as given in Figure 1. 2016, the recommended design (SP) 41, the minimum daylighting
This led to the accumulation of foul sky illuminance values are 9000 levels required inside the living room,
odour in corridors, resulting in the lux for warm and humid climate. bedroom, and kitchen are 50 lux,
perceived notion that SRA buildings For the integration with artificial 152 lux, and 200 lux, respectively.
are poorly maintained with foul- lighting during daytime working According to NBC, the design should
smelling corridors. hours, an increase of 500 lux in be checked for the minimum air
the recommended sky design changes per hour (ACH) achieved.
Interchanging the positions of the illuminance for daylighting is This will ensure that the requisite
kitchen and the toilet would help suggested. This shows that outside standards for the dwellings are
increase the lighting levels in the the building, there should be a fulfilled. The minimum ACH
kitchen. As a result, the ventilation minimum of 9000 lux at the lower required for the bedroom is 2–4 ACH
rate inside the space would also go up. floor in the design to meet the and for the living room is 3–6 ACH.

ILLUMINATION ANALYSIS
Illumina on Analysis for Different distances between two Buildings
Lux
9000+
8100
7200
6300
5400
4500
3600
2700
1800
900
0

D = 3 M D = 6 M D = 9 M D = 12 M D = 15 M
Analysis Hour : 12:00 PM According to NBC, the average illumina on
Sky Condi on : Overcast Sky levels in the exterior should be 9000 lux for
Weather File : Mumbai_Epw File Warm and Humid Climate. The analysis has
been done for Worst case scenario considering
over cast Sky Condi on Where there is almost
95% Cloud cover
38 M
72 M CONCLUSION:
The illumina on analysis shows that the space
D shaded between Two Buildings receives Average
9000 lux when minimum distance between
38 M them is 12 M. The illumina on level increases
and reaches a satura on point at 14 M gap and
almost remains the same when the distance
38 M 38 M 64 M between the buildings increases therea”er.
Analysis Grid - Height 750 mm Plan

» Figure 2: Illumination analysis for clear distance between two buildings