GREEN BUILDING CASE STUDY -VVIP circuit house pune by pranali shewale

VVIP CIRCUIT HOUSE Architects: Sunil Patil & Associates Project: VVIP Circuit House Location: Pune, India Client: Public Works Department, Maharashtra Lead Architects: Ar. Sunil patil, Ar. Anuja pandit, Er. Sanjay patil Green Building Consultants: Environmental Design Solutions Structural Consultants: Dr. A. B. Kulkarni associates, Sangali MEP Consultant: Siddhivinayak Mep Consultants, Pune Civil Contractors: Shubham Civil Pvt. Ltd, Pune

Circuit house is a government public building which not only accommodates the VIP authorities but also acts as a node for political meetings, government authorities’ discussions and conferences. The project is mainly divided into two parts• Accommodation - Guest suites • Public areas –Conference and meeting hall facilities, Dining, Reception, VIP and visitor’s waiting areas etc. Design is based on climate responsive architecture with passive strategies for thermal and visual comfort along with innovative active strategies to achieve energy efcient green building. The project has received GRIHA Five star rating.

EVOLUTION :

GREEN BUILDING FEATURE :

Orientation and planning

Shaded courtyard

Climate responsive building

Eco-friendly materials

Passive cooling strategy

Transition spaces

1.ORIENTATION AND PLANNING: The building is oriented East-West. The residential zone lies on the north and the south, where the solar radiations can be cut with the help of shading devices yet allowing good ventilation. West side of the building comprises of intermittent spaces. As these spaces are occupies for short time span, the harsh western sun does not affect the occupants directly. The east side has dining area, CM and DCM suites where the morning sun is taken care of by the overhangs.

LANDSCAPE DESIGN : in this project , the idea was to design the landscape in the same theme as architecture . language od straight line and contemporary architecture and material ow in the landscape ad hence here , seamlessly merges the space becomes inherent feature of the project

SHADED COURTYARD: The courtyard building is a traditional & effective conguration for cooling in hot-arid climates, where there is a large diurnal temperature swing. It forms the focal point in the entire building and also acts as a waiting lobby for the outsiders ,which actually redenes a chaotic situation in case of crowd. One can enjoy the water body with a shaded courtyard & the diffused daylight, thus ,having a pleasant feeling of being in context with nature.

The semi - shaded courtyard acts as micro climate modier . it act as passive design strategy which reduce the energy consumption in building . because of such passive techniques sustainable design is achieve

SUSTAINABLE SITE PLANNING: • All necessary measures were adopted to preserve and protect landscape during construction, such as limiting construction activity to pre-designated areas, soil erosion control and storm water management using trenches and sedimentation basin. • Building was planned on the site in such a way that minimum numbers of trees are required to be cut. • Landscape has been designed to maximize green area and minimize hard paving. The net paved area is only 21.32% of landscape area

CLIMATE RESPONSIVE BUILDING ENVELOP:

East Facade : East facade is critical only for morning hours. To deal with the sun, shading devices are designed.

The facade of the building is very crucial element as it directly related to thermal and visual comfort. Each facade in this project is derived from its orientation and function.

North Facade: North Side receives very less direct solar radiation as well as direct sun light throughout the year; hence this side is most preferred for suites. There is Diffused radiation for most of the year. Overhangs are designed to cater to summer sun.

North Facade South Facade : South side of building exposed to sun during winter solstice results in heat gain and glare. Glare and radiation gains are caused by angle of the sun above the horizon as seen in a section view parallel to sun’s azimuth. South facades are designed in such a way that terraces form a buffer between outside and main facade for 50% of thefacade and for remaining part 150 mm wide louvers placed 250 mm c/c in order to get light and thermal environmental comfort in the months of January to November.

summer solstice winter solstice

West Facade : West facade is the most critical as it receives maximum solar radiation. To avoid this heat gain, most of the facade is dead and only ancillary spaces are planned on this side. The conference on west facade is secondary activity and used for shorter durations. The vertical louver are planned for the conference to avoid the solar gains.

West Facade

WORKING OF LOUVERS :

PASSIVE COOLING STRATEGY (VENTILATION STRATEGY) The ventilation strategy for this project aims at encouraging use of natural ventilation and reducing HVAC demand. All the common areas of the building, such as reception, waiting’s etc are naturally ventilated. For dining area is naturally ventilated along with fresh air is supply though evaporative cooling unit. All the suites and conference room on run on VRV air-conditioning which is designed considering 50% occupancy. The suites are designed with openable windows so that occupant is encouraged to open the windows unlike conventional star category hotels

In hot dry climate of Pune, water bodies have been introduced for evaporative cooling. They act as micro-climate modier and also help in coiling of naturally ventilated public areas. Finished with black polished granite, water bodies give continuous and deep feel adding to the ambience

COOL AIR (COOLING BY EVAPORATION ) COOL SURFACE

PROTECTION FROM HOT DUSTY WIND WATER BODY

ECO-FRIENDLY MATERIALS Materials are very important part of the design as they directly affect the energy efciency of the building. In this project AAC blocks have been used for walls which results in reduction in non-structural weight of building. This blocks are xed with adhesives where no curing is required and cement mortar has been avoided completely. Direct application of plaster of paris was possible here due to nished AAC block masonry. There is major saving in mortar and water. Recycled ceramic tiles have been used for ooring in suites and granite has been used for all common areas. Minimized solar heat gain and maximized daylight areas are seen in the building due to use of efcient glass. Heat gains have been reduced due to use of effective roof insulation Utilization of y ash in reinforced concrete and masonry mortar is up to 35% Exposed concrete is used as a permanent nish to the building to avoid the repeated maintenance requirement. Louvered facades have been created which has resulted in achieving the diffused natural daylight. It has also enhanced the harmony between the inner & outer environment. In interior works FSC certied wood based materials and all Low VOC materials have been used.

AAC blocks

y ash in reinforced concrete

Low VOC color

heat roof insulation

Minimized solar heat gain and maximized daylight areas are seen in the building due to use of efcient glass.

Recycled ceramic tiles

grass concrete paving block

FSC certied wood

GRIHA rating

TRANSITION SPACES Transition spaces play an important role in harsh climates, where there is a large environmental distinction between external and internal thermal conditions. Traditionally in such climates, transition spaces are found in different forms like courtyards, verandas, loggia, balconies and corridors. As transition spaces act as a buffer between outside & inside ,they offer a linear, sequential experience to moderate thermal conditions. These spaces are very close to the outside environment but are protected from sun & rain. The principal areas of the building gain advantage in maintaining the desired thermal comfort levels with the help of transition spaces. The suites on south side have terrace on exterior façade and then passage and then courtyard. This sequential experience plays very important role in achieving comfort.

Criterion Criterion name number

Points

Reduce UHIE and maintain native vegetation 6 cover on site

Passive architectural design and systems

Good fenestration design for reducing direct 6 heat gain and glare while maximising daylight penetration

Thermal eﬃciency of building envelope

Use of energy eﬃcient appliances

6 7

Use of renewable energy on site 4 Reduction in building and landscape water 5 demand

Reduce embodied energy of building

Use of low-energy materials in interiors

Adoption of green Lifestyle

Innovation

2 44

Total

TRANSITION SPACE

SERIES OF SPACES

In order to achieve a SVAGRIHA rating each project must achieve a certain number of points in each category as mentioned below. This is to ensure that each project reduces its overall environmental impact and not just the impact through energy and water. Based on the number of points the project attempts, the rating shall be provided as mentioned in the table: