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SECTION A
SCALE 1:200
SECTION THROUGH EXHAUST ROOM
SCALE 1:50
SECTION THROUGH PLENUM ROOM
SCALE 1:50
BLAST AREA
OUTLET
DISCHARGE
INLET CONE
OUTLET
INLET COLLAR
MECHANICAL VENTILATION:
BEARING
SUPPORT
PLENUM
ROOM
SCROLL
IT IS A FORCED SYSTEM WHICH REQUIRE EQUIPMENTS AND CONSUMES POWER TO
ACHIEVE REQUIRED CONDITIONS.
IT IS REQUIRED WHEN:
1) NATURAL MEANS OF VENTILATION AND CLIMATIC
CONTROLS ARE DIFFICULT TO PROVIDE AND INADEQUATE.
HOUSING
SUPPORTS
PLENUM AND EXSHAUST
1. THE PLACEMENT OF PLENUM AND EXSHAUST ROOM SHOULD BE AT THE
OPPOSITE ENDS TO AVOID THE OVERLAPPING OF DUCTS WHEN THE HEIGHT OF
THE BASEMENT IS LOW.
2. SIZE OF PLENUM DUCT GOES ON REDUCING AFTER EVERY BAY, VENTS ARE
GIVEN AT EVERY13 M INTERVAL,
WHILE EXSHAUST DUCTS REMAINS SAME THROUGHOUT.
3. DUCT SIZE DEPENS ON THE RPM OF THE FAN AND THE AREA ITS SERVING.
4. THE VENTS OF PLENUM AND EXSHAUST ARE STAGGERED FOR BETTER AIR
CIRCULATION
5. PLENUM DUCT IS NOT PROVIDED WHERE THERE IS AN EXTERNAL WALL.
SCROLL SIDE
A
CENTRE PLATE
SPIN BAFFLE
R.C.C. COLUMN
EXTRACT/ OUTLET DUCT
CROSSING MADE IN DUCT TO
RESIST VIBRATION
FIXING MEMBERS
EXHAUST
ROOM
MODES OF MECHANICAL VENTILATION:
SCHEMATIC DETAIL OF BASEMENT VENTILATION
A CENTRIFUGAL FAN (ALSO SQUIRREL-CAGE FAN, AS IT LOOKS LIKE A ) IS A
MECHANICAL DEVICE FOR MOVING OR . IT HAS A COMPOSED OF A NUMBER OF FAN ,
OR , MOUNTED AROUND A HUB. THE HUB TURNS ON A THAT PASSES THROUGH THE FAN
HOUSING. THE GAS ENTERS FROM THE SIDE OF THE FAN , TURNS 90 DEGREES AND
DUE TO AS IT FLOWS OVER THE FAN BLADES AND EXITS THE FAN HOUSING.
CENTRIFUGAL FANS CAN GENERATE PRESSURE RISES IN THE GAS STREAM.
ACCORDINGLY, THEY ARE WELL-SUITED FOR PROCESSES AND CONTROL SYSTEMS.
THEY ARE ALSO COMMON IN CENTRAL HEATING/COOLING SYSTEMS.
FAN COMPONENTS
METAL STRAPS
THE MAJOR COMPONENTS OF A TYPICAL CENTRIFUGAL FAN INCLUDE THE FAN WHEEL,
FIXED TO CEILING
FAN HOUSING, DRIVE MECHANISM, AND INLET AND/OR OUTLET .
TYPES OF DRIVE MECHANISMS
PRIMARY EXHAUST DUCT
THE FAN DRIVE DETERMINES THE SPEED OF THE FAN WHEEL (IMPELLER) AND THE
500MMX400MM
EXTENT TO WHICH THIS SPEED CAN BE VARIED. THERE ARE THREE BASIC TYPES OF
FAN DRIVES.
DIRECT DRIVE
THE FAN WHEEL CAN BE LINKED DIRECTLY TO THE SHAFT OF AN . THIS MEANS THAT
THE FAN WHEEL SPEED IS IDENTICAL TO THE MOTOR'S SPEED. WITH THIS TYPE OF FAN
DRIVE MECHANISM, THE FAN SPEED CANNOT BE VARIED UNLESS THE MOTOR SPEED IS
ADJUSTABLE.
SECONDARY EXHAUST DUCT BELT DRIVE
A SET OF ARE MOUNTED ON THE MOTOR SHAFT AND THE FAN WHEEL SHAFT.
400MMX300MM
N
EXHAUST GRILL
EXHAUST GRILL AT
SKIRTING LEVEL
BASEMENT PLAN AT -2.8 M DEPICTING
MECHANICAL VENTILATION
SCALE 1:200
TERTIARY DUCT TO EXHAUST GRILL AT
SKIRTING LEVEL 200MMX150MM
CONNECTION BETWEEN EXHAUST DUCTS
SIGNATURE AND STAMP
Name : SHREESHA ARONDEKAR
Assign. No.:
SCALE - AS SPECIFIED
MECHANICAL VENTILATION
Subject : BUILDING SERVICES
Roll no. :
4th YEAR, B.ARCH
Date :
Batch : 2010 - 2015
Padmashree Dr. D.Y.Patil College of Architecture
Nerul, Navi Mumbai
PRODUCED BY AN AUTODESK EDUCATIONAL PRODUCT
PRODUCED BY AN AUTODESK EDUCATIONAL PRODUCT
BACK PLATE
BLADES
DESCRIPTION
1. THERE ARE THREE KINDS OF MECHANICAL VENTILATION SYSTEMS a. EXHUST VENTILATION ONLY, WITH A SUPPLY OF
REPLACEMENT AIR BY NATURAL MEANS.
b. INPUTT OF AIR ONLY, THE EXHAUST AIR FINDING ITS OWN WAY OUT OF THE
VENTILATED SPACE.
c. THE BALANCED SUPPLY AND EXTRACTION OF AIR BY AN INTEGRATED SYSTEM,
WHICH IS CALLED AS THE 'PLENUM SYSTEM'.
2. MECHANICAL VENTILATION WILL NOT PROVIDE THE FULL ENVIRONMENT CONTROL
OF THE AIR CONDITIONED SYSTEM, HOWEVER IT IS CAPABLE OF MEETING THE BASIC
VENTILATION NEEDS.
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