Page 47 - Shashwat - Restoring Green Economy

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and air circulation inside the space.
North
Cross-ventilation ensures that the
building is naturally ventilated,
Wind flow thereby improving the overall ACH.
Sun Path At least, ventilator provision must be
given to improve the movement of air
West East within the space as shown in Figure 4.

The introduction of jaali over windows
could be an efficient feature to reduce
the incoming air temperature using
the the funnel effect. The addition of
South an internal chowk inside the building
volume increases the cross-ventilation
» Figure 3: Building orientation rate of the building.

Wing walls: These are projections
Design: The orientation of the proper ventilation inside the space. on the exterior wall to effectively
building’s longer façade along the Taking into consideration the surface enhance the natural ventilation.
north-south direction will reduce the reflectance of the interior surfaces When properly positioned, the wing
heat gain inside the buildings (Figure and the visual light transmittance walls produce high pressure and
3). Thus, the total radiation received (VLT) of the window’s glazing will low-pressure regions on the inlet and
by the building mass will be reduced. ensure the deep penetration of the outlet windows, respectively.
The wind flow will be in a near- light into the inner spaces. According Hence, this helps to draw in more
parallel range with the building’s to the previously discussed norms, wind even during low external wind
longer axis and will increase the maintaining a proper distance velocity conditions.
ventilation rate inside the building between two buildings will guarantee
volume. enough daylight availability at the Light wells: These are external
lower floors and better air movement. spaces provided within the volume of
The spatial design should be a building to allow light to reach the
efficiently planned by the architects Cross-ventilation: This should be darker or unventilated areas. Light
in order to meet the building taken care of by providing windows wells are commonly characterized
standards. Avoiding rooms and on either side of the rooms which by highly reflective surfaces.
spaces without adequate openings continues to be a lacking area The provision of light wells will
for daylight and ventilation is the best within SRA schemes. SRA buildings significantly improve the quality of
strategy. Maximizing the window are mostly designed with one- lighting and ventilation inside the
openings for better intake of sunlight sided ventilation. This affects the building space, thus illuminating the
and openable areas will ensure ventilation rate of the building space darker spaces inside the building.

Cross Ven la on Single Sided Ven la on

VENT Without
VENT
WINDOW WINDOW

LIVING CORRIDOR CORRIDOR LIVING
INTERNAL CHOWK

» Figure 4: Cross-ventilation and single-sided ventilation