Library case study on green architecture. Green architecture. Green architecture also known as “sustainable architecture” or “green building” is an approach to architectural design which emphasizes the place of the buildings with both local ecosystems & global environment.
Green architecture also known as “sustainable architecture” or “green building” is an approach to architectural design which emphasizes the place of the buildings with both local ecosystems & global environment.
It aims to create environmental friendly and energy efficient buildings. It entails actively harnessing renewable natural resources like solar energy and utilizing materials that cause the least possible damage to the global commons—water, soil, forests& air.
1.Incorporate solar passive techniques in a building to minimize load on conventional systems (heating, cooling, ventilation & lighting).
2.Design energy efficient lighting and HVAC (heating, ventilation, and air conditioning) systems.
3.Use renewable energy systems (solar photovoltaic systems/ solar water heating systems) to meet a part of building load.
4.Use low energy materials and methods of construction and reduce transportation energy.
The dark colors on the thermo gram of a Passive house (right) show how little heat is escaping compared to a traditional building (left)
1. Solar Chimney: A solar chimney often referred to as thermal chimney is a way of improving the natural ventilation of buildings by using convection of air heated by passive solar energy. A simple description of a solar chimney is that of a vertical shaft utilizing solar energy to enhance the natural stack ventilation through a building.
1. Improved ventilation rates on still, hot days
2.Improved control of air flow through the building
3.Improved air quality and reduced noise levels in urban areas
4.Increased night time ventilation rates
5.Allow ventilation rates of narrow, small spaces with minimal exposure to external elements
6.Improved cooling during warm seasons
7.Improved thermal comfort (improved air flow controls, reduced draughts)
The wind catcher functions on several principles:
First, a wind catcher is capped and has several directional ports at the top (Traditionally four). By closing all but the one facing away from the incoming wind, air is drawn upwards using the, similar to how opening the one facing the wind would push air down the shaft. This generates significant cooling ventilation within the structure below.
In a windless environment or waterless house, a wind catcher functions as a stack effect aggregator of hot air. It creates a pressure gradient which allows less dense hot air to travel upwards and escape out the top. This is also compounded significantly by the day-night cycle mentioned above, trapping cool air below. The temperature in such an environment can't drop below the nightly low temperature.
Passive solar design using an unvented trombe wall and summer shading
Good Earth “Hues of Life” is a tropical high rise apartment building, a green alternative which responds to and takes advantage of the climate and the location.
Designed to accommodate 31 apartments with sky gardens, “Hues” is Good Earth’s foray into bio-climatic skyscrapers.
1. 3 bedroom—20 units(2380 sq ft)
2. 3 bedroom—11 units(2080 sq ft)
1. The individual sky garden: These are ‘green terraces’ with a breathtaking view in each apartment. The design of sky gardens minimize the heat & moisture on the lower flower, by virtue of protecting the wall below.
They are staggered on the alternate floors which enhance the air movement between the floors. It also acts as the buffer from dust, heat and lashing rain.
A space for children to play, neighbors to meet, plants and lawn giving the air a fresher feel. The sky court is designed to integrate hard and soft landscape, to create a variety of areas which encourage interaction among different groups.
The atria created by the sky court, act as wind scoops, drawing fresh air into them, and allowing hot air to escape, even through the homes. The same can be said for natural light, which penetrates to the deepest area of the building through them.
Large openings have been provided on the windward and leeward sides, within the apartments, and cross ventilation is taken care of through the air spaces in the sky courts. The sky gardens in the apartments create air currents, drawing air into the house.
the service core
The service core is located on the south side of the building, and thus acts as the buffer from the heat, keeping the maximum heat gain away from the user space.
For creating energy efficient and thermally comfortable spaces, a combination of hollow terracotta blocks and semi wire cur bricks have been used, for the external walls.
This forms a wall with three air cavities, the terracotta blocks on the outside and the bricks on the inside, keeping the interiors cool and bringing down the use of air-conditioning.
Besides serving as a passive coolant, the external wall is also very low on maintenance, bringing down the long term maintenance costs of the building.
1. Energy-efficient buildings in India—Tata Energy Research Institute (TERI)
4. http://en.wikipedia.org/wiki/Image:Passivhaus_thermogram_gedaemmt_ ungedaemmt.png