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NATURAL VENTILATIONPresentation By- Ar. Roopa Chikkalgi1
NATURAL VENTILATION IS THE PROCESS OF SUPPLYING AND REMOVING AIR
THROUGH A SPACE BY NATURAL MEANS IT CAN BE ACHIEVED WITH ...
• THE PURPOSE OF PROVIDING NATURAL VENTILATION IS TO ACHIEVE
MAXIMUM HUMAN COMFORT IN INDOOR BY UTILIZING MAXIMUM
NATURAL ...
DIFFERENT TECHNIQUES TO ACHIEVE
NATURAL VENTILATION:-
• STACK EFFECT
• WIND TOWER
• COURTYARD EFFECT
Presentation By- Ar. ...
STACK EFFECT :-
STACK EFFECT DEPENDS ON THERMAL FORCES AND DIFFERENCE IN
TEMPERATURE .
REASON OF STACK EFFECT :-
• PRESSUR...
STACK VENTILATION SECTIONS :-
TALL ROOMS TALL ROOMS AT EDGE
STAIRS AS STACKTALL ROOMS WITHIN
Presentation By- Ar. Roopa Ch...
WIND TOWER
• AIR ENTERS IN WIND TOWER THROUGH OPENINGS- COOLED DOWN- BECOMES
HEAVIER AND SINKS DOWN ( PRESENCE OF AIR MOVE...
•
EVAPORATIVE COOLING
DIFFERENT TYPES OF WIND TOWERS :-
WATER SUPPLY
MULTI DIRECTIONAL WIND CATCHER
Presentation By- Ar. R...
COURTYARD EFFECT:-
DUE TO INCIDENT SOLAR RADIATION IN A COURTYARD, AIR GETS WARMER
AND RISES , COOL AIR FROM GROUND LEVEL ...
COURTYARDS IN MODERN BUILDINGS :-
AMERICAN INSTITUTE OF INDIAN STUDIES (GURGAON):-
VIEW
SUNKEN COURTYARD INSIDE
THE BUILDI...
•NATURAL VENTILATION EXTERNAL FEATURES:-
• ORIENTATION OF BUILDINGS
• POSITION OF OPENINGS
• CROSS VENTILATION
• SIZE OF O...
MASSING AND ORIENTATION OF BUILDING:-
• AS A GENERAL RULE, THIN TALL BUILDINGS WILL ENCOURAGE NATURAL
VENTILATION AND UTIL...
OPENING SIZE:-
Pairing a large outlet with a small inlet
increases incoming wind speed.
SMALL
INLETLARGE
OUTLET
Presentati...
OPENING TYPE:-
OPENING CAN BE ANY TYPE ACCORDING TO THE
BUILDING TYPE AND CLIMATIC CONDITION
Presentation By- Ar. Roopa Ch...
CROSS VENTILATION:-
WINDOWS OR VENTS PLACED ON OPPOSITE SIDES OF
THE BUILDING GIVE NATURAL BREEZES A PATHWAY
THROUGH THE S...
VARIOUS TECHNQUES USED FOR NATURAL VENTILATION:-
DOUBLE APERTURES
USED FOR ENSURING
VENTILATION
WINDOW FOR VIEW AND
JALI V...
Natural cooling system of
jaisalmer
• Dense clustering of buildings
• Sun control through
orientation and structural
proje...
Plan middle income houses in
jaisalmer
• This type of houses have two or three storey
structures and can be considered as ...
Streets of jaisalmer
• There are major streets oriented
almost E-W and minor streets
are right angle to these.
• This comp...
SCOPE –
• TO MINIMIZE THE EXTERNAL ENERGY OR MECHANICAL SYSTEM.
• IMPLEMENTATION OF NATURAL VENTILATION SYSTEM- NATURAL DA...
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Natural ventilation

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Natural ventilation is the process of supplying and removing air through an indoor space by natural means, meaning without the use of a fan or other mechanical system. It uses outdoor air flow caused by pressure differences between the building and its surrounding to provide ventilation and space cooling.

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Natural ventilation

  1. 1. NATURAL VENTILATIONPresentation By- Ar. Roopa Chikkalgi1
  2. 2. NATURAL VENTILATION IS THE PROCESS OF SUPPLYING AND REMOVING AIR THROUGH A SPACE BY NATURAL MEANS IT CAN BE ACHIEVED WITH OPENABLE WINDOWS OR VENTS. NATURAL VENTILATION AND AIR MOVEMENT CAN BE SIMPLY ACHEVIED BY ‘STRUCTURAL CONTROLS’ AS IT DOES NOT DEPENDS ON ANY FORM OF EXTERNAL ENERGY SUPPLY OR MECHANICAL INSTALLATION. WHAT IS NATURAL VENTILATION ? Presentation By- Ar. Roopa Chikkalgi 2
  3. 3. • THE PURPOSE OF PROVIDING NATURAL VENTILATION IS TO ACHIEVE MAXIMUM HUMAN COMFORT IN INDOOR BY UTILIZING MAXIMUM NATURAL ENERGY AND RESOURCES. WHY NATURAL VENTILATION ? Presentation By- Ar. Roopa Chikkalgi 3
  4. 4. DIFFERENT TECHNIQUES TO ACHIEVE NATURAL VENTILATION:- • STACK EFFECT • WIND TOWER • COURTYARD EFFECT Presentation By- Ar. Roopa Chikkalgi 4
  5. 5. STACK EFFECT :- STACK EFFECT DEPENDS ON THERMAL FORCES AND DIFFERENCE IN TEMPERATURE . REASON OF STACK EFFECT :- • PRESSURE DIFFERENCE BETWEEN THE OUTSIDE AIR AND THE AIR INSIDE THE BUILDING CAUSED BY DIFFERENCE IN TEMPERATURE Outdoor air Outdoor air Section Presentation By- Ar. Roopa Chikkalgi 5
  6. 6. STACK VENTILATION SECTIONS :- TALL ROOMS TALL ROOMS AT EDGE STAIRS AS STACKTALL ROOMS WITHIN Presentation By- Ar. Roopa Chikkalgi 6
  7. 7. WIND TOWER • AIR ENTERS IN WIND TOWER THROUGH OPENINGS- COOLED DOWN- BECOMES HEAVIER AND SINKS DOWN ( PRESENCE OF AIR MOVEMENT) • AFTER WHOLE DAY AIR EXCHANGE – TOWER BECOMES WARM IN THE EVENING . • TOWER WALLS ABSORBS HEAT DURING DAYTIME AND RELASES AT NIGHT WARMING COOL NIGHT AIR AT NIGHT. • A TYPICAL WIND TOWER SECTIONPresentation By- Ar. Roopa Chikkalgi 7
  8. 8. • EVAPORATIVE COOLING DIFFERENT TYPES OF WIND TOWERS :- WATER SUPPLY MULTI DIRECTIONAL WIND CATCHER Presentation By- Ar. Roopa Chikkalgi 8
  9. 9. COURTYARD EFFECT:- DUE TO INCIDENT SOLAR RADIATION IN A COURTYARD, AIR GETS WARMER AND RISES , COOL AIR FROM GROUND LEVEL FLOWS THROUGH THE LOWER OPENINGS RADIATION TO SKY LANDSCAPE OR WATER BODY SECTION SHOWING COURTYARD EFFECT Presentation By- Ar. Roopa Chikkalgi 9
  10. 10. COURTYARDS IN MODERN BUILDINGS :- AMERICAN INSTITUTE OF INDIAN STUDIES (GURGAON):- VIEW SUNKEN COURTYARD INSIDE THE BUILDING WITH WATER BODY AND LANDSCAPE PLAN Presentation By- Ar. Roopa Chikkalgi 10
  11. 11. •NATURAL VENTILATION EXTERNAL FEATURES:- • ORIENTATION OF BUILDINGS • POSITION OF OPENINGS • CROSS VENTILATION • SIZE OF OPENINGS • OPENING TYPES Presentation By- Ar. Roopa Chikkalgi 11
  12. 12. MASSING AND ORIENTATION OF BUILDING:- • AS A GENERAL RULE, THIN TALL BUILDINGS WILL ENCOURAGE NATURAL VENTILATION AND UTILIZE PREVAILING WINDS, CROSS VENTILATION, AND STACK EFFECT. • TALL BUILDINGS ALSO INCREASE THE EFFECTIVENESS OF NATURAL VENTILATION, BECAUSE WIND SPEEDS ARE FASTER AT GREATER HEIGHTS Tall buildings improve natural ventilation, and in lower latitudes reduce sun exposure. Presentation By- Ar. Roopa Chikkalgi 12
  13. 13. OPENING SIZE:- Pairing a large outlet with a small inlet increases incoming wind speed. SMALL INLETLARGE OUTLET Presentation By- Ar. Roopa Chikkalgi 13
  14. 14. OPENING TYPE:- OPENING CAN BE ANY TYPE ACCORDING TO THE BUILDING TYPE AND CLIMATIC CONDITION Presentation By- Ar. Roopa Chikkalgi 14
  15. 15. CROSS VENTILATION:- WINDOWS OR VENTS PLACED ON OPPOSITE SIDES OF THE BUILDING GIVE NATURAL BREEZES A PATHWAY THROUGH THE STRUCTURE.Presentation By- Ar. Roopa Chikkalgi 15
  16. 16. VARIOUS TECHNQUES USED FOR NATURAL VENTILATION:- DOUBLE APERTURES USED FOR ENSURING VENTILATION WINDOW FOR VIEW AND JALI VENTILATION COLUMN COURTYARD COOLING SYSTEM-DIWAN E-KHAS, RED FORT, DELHI • MULTI-DIRECTIONAL WINDCATCHER Presentation By- Ar. Roopa Chikkalgi 16
  17. 17. Natural cooling system of jaisalmer • Dense clustering of buildings • Sun control through orientation and structural projections • Massive construction for roofs and walls • Courtyards and other air ducts for ventilation. Plan of jaisalmer Presentation By- Ar. Roopa Chikkalgi 17
  18. 18. Plan middle income houses in jaisalmer • This type of houses have two or three storey structures and can be considered as the typical houses of jaisalmer , these have additional rooms and has a balcony projecting on to the street. Presentation By- Ar. Roopa Chikkalgi 18
  19. 19. Streets of jaisalmer • There are major streets oriented almost E-W and minor streets are right angle to these. • This compact structure of the housing doesn’t allow the sun rays to penetrate , and also serve as device of shading. Presentation By- Ar. Roopa Chikkalgi 19
  20. 20. SCOPE – • TO MINIMIZE THE EXTERNAL ENERGY OR MECHANICAL SYSTEM. • IMPLEMENTATION OF NATURAL VENTILATION SYSTEM- NATURAL DAYLIGHTING CAN BE PROVIDED. • THERMAL COMFORT CAN BE ACQUIRED WITH LESS ECONOMICAL BUDGET Presentation By- Ar. Roopa Chikkalgi 20

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