LEDeG Trainees Hostel, Leh

PRESENTATION ON COLD AND SUNNY CLIMATEBUILDING: LEDeG Trainees Hostel, Leh

VEINESH PRATIK BARCH/15007/12Page #MY BUILDING:LEDeG Trainees Hostel, Leh

Page #LEDeG Trainees Hostel, LehArchitect : Sanjay Prakash Sanjay Prakash and AssociatesClimate : Cold and SunnyConsultants : In-houseProject Period: 1994-1996Size : 300m Covered area in small CampusClient/Owner : Ladakh Ecological Development Group

Page #General DescriptionLEDeG (Ladakh Ecological Development Group) is a well known non government organization operating out of various centres in Ladakh. This project is located in LEDeGs Chanapa Centre, in Leh.Lehs characteristically cold and sunny climate (temperature is below 30 with over 320 sunny days in a year) makes it a testing ground for solar technologies despite its small population.It provides accommodation for 24 persons and is double storey with 12 double Bed Room, and ancillary spaces. It is in north part of campus and is slightly south-facing slope.

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Page #Traditional techniques have been modified and adapted for use in the building. The load-bearing walls of the ground floor are made in rubble masonry with mud mortar.The upper floor uses load-bearing sun-dried mud bricks (adobe) in mud mortar. Partition walls are also executed in adobe.

CONSTRUCTION TECHNIQUESPage #The intermediate floors and roofs are timber-framed, with poplar wood joists covered by twigs, grass, and earth. In order to combat a rising local fear of increasing leakages in such construction, a small slope has been given to the flat roof so as not to create a sag in the middle.

Page #DESIGN FEATURESPage #PASSIVE SOLAR DESIGNSOUTH ORIENTATIONThe building is oriented south, every habitable room has a liberal south exposure. Only corridors, toilets and staircase are without direct south exposure. The 12 bedrooms and the laundry and study room all have large south exposure for solar heat gain with almost no overhangs. SOALRIUMAt the centre of building is a south approached air lock entrance leading to the study room. Above this is another study room. Either of these can be occasionally used as a dining space. Since these spaces are used in the day only, they are heated by south glazing tilted at 60 to the horizontal.

Page #The directly gained solar heat is stored in the mass of the building and the warmth is retained for few year after sundown.

TROMBE WALLThe bedroom have been provided with a mix of windows and glazed walls. Some of these are the classical Trombe wall type design with vents for convective loop formation.Others are provided without vents, especially as heat is not required in the bedrooms until early in the evening. These mass walls are made of RUBBLE (ground floor) and ADOBE (first floor).Page #TROMBE WALL

Page #INSULATION AND MASSThe thick earth in wall and roof provides insulation and mass.ABSORBING FINISHThe south wall are painted black to provide better heating. This colour along with maroon, had been used to embellish all openings. Local traditions have been respected while providing for better energy efficiency.WEATHER STRIPPINGAll opening have cork based weather strips at the edges to seal them tight.

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RENEWABLE ENERGY SYSTEMSOLAR HOT WATERA flat plate thermosiphonic collector system is provided on the roof of the building. At a 60 tilt, it provides year round hot water.FUTURE PROVISION FOR PHOTOVOLTAIC CHARGINGIt is planned to fit the building with photovoltaic cell to provide most of the night lighting Page #INTERIOR

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Page #SUMMARY OF THERMAL EVALUATIONDURING WINTER

All the rooms remained above 0 c at all times in january, even when the temperature outside fell to 17 c. Page #REMARKS:

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Page #SUMMARY OF THERMAL EVALUATIONDURING SUMMER

Summer performance of the passive heating technologies is also important, especially With regard to overheating during the day. The data shows that the rooms are quite warm during the summer.Page #REMARKS

Page # THANK YOU

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