Smoke Ventilation Calculation

CFM CALCULATION

A=

FIRE AREA

P=  Y= " =

FIRE PERIMETER HEI!HT OF BOTTOM OF CLEAR LAYER HEAT RELEASE MASS FLO# OF HOT !ASES ENTERIN! THE SMOKE LAYER

.188 PY^(3/2) =

M =

HEAT RELEASE RATE RATE

A $ "=

%= CP=

%F/(MF$C&)=

Ø=

SPECIFIC HEAT  TEMP.  TEMP. RISE OF SMOKE LAYER LAYER ABOVE AMBIENT TEMP

 T'=

AMBIENT TEMP  TEMP OF SMOKE LAYER LAYER

 T'  Ø=

 TC= ρ0=

DENSITY OF AIR AT AMBIENT TEMP MECHANICAL VENTILATION

M $ T) / (ρ Τ )=

(

0

0

V=

*S%.M 12 M 2.+M 2,' K#/S%.M K!/S K# 1.'1 K-/K!.K  C 3'3K  K  1.2 K!/C.M C.M/S 0 CFM

RESTARANT AND CAF0. CEMENT #ORKS. BTCHERS SLA!HTEROSES.

!ROP 1

PO#ER STATIONS. CREAMERIES AND #HOLESALE DAIRIES. BAKERIES AND BISCIT MANFACTRERS. CHEMICAL #ORKS #ITH LITTLE FIRE HA5ARD (OTHER#ISE !ROPS AND 4). MOTOR CAR REPAIR SHOPS AND LAR!E MOTOR !ARA!ES.

!ROP 2

MOTOR VEHICLES AND ACCESSORIES MANFACTRERS. MACHINE FACTORIES INCLDIN! LI!TH METAL MANFACTRERS. COTTONSPINNIN! MILLS BLEACHERS DYE #ORKS. PRINTIN! OFFICES. BRSH MANFATRERS.  TANNERIES LEATHER !OODS MANFACTRERS. CEREAL MILLS !RINDIN! AND PEELIN! MILLS. RBBER ARTICLES MANFACTRERS( ECLSIVE OF FOAM RBBER ). PLASTIC AND PLASTIC PRODCTS MANFACTRERS (ECLSIVE OF FORM). CARDBOARDPAPER AND PAPER PRODCTS MANFACTRERS. RADIO AND TELIVISION MANFACTRERS. SA#IN! MILLS AND #OODSIN! MANFACTRERS (INCLSIVE OF FRNITRE FACTORIES). SOAP AND #A PRODCTS MANFACTRERS.  TETILES AND CARPETS MANFACTRERS. SOND RADIO FILM AND TELIVISION STDIOS. #OOLS AND #ORSTED MILLS. S!AR #ORKS AND REFINERIES.

!ROP 3

CELLLOID. PAINTS SEALIN!#A RESIN TRPENTINE SOOT TAR. FIRE#ORKS LI!HTIN! !OODS. FLOOR COVERIN! LINOLEM. AIRCRAFT HAN!ERS. #OOD#OOL. FORM RBBER FORM !OODS.

!ROP 4

ELECTRICAL APPARATS. PRESS#OOD BOARDS. !LASS AND CERAMIC !OODS.  TETILES.

!ROP +/1

FOOD. METAL !OODS. CARPETS. PHARMACEITICALS !OODS AND COSMETICS. PAPER CARDBOARD. ROOFIN! FELTS (TARRED BOARD) (STACKED HORI5ONTALLY). VENEERN! BOARDS OR TIMBER. FRNITRE.

!ROP +/2

CORK. PLASTIC PRODCTS(ECLSIVE OF FOAM). VARNISH IN TINS (PACKED IN CARDBOARD). PAPER ROLLS (STORED HORI5ONTALLY). FLOOR COVERIN!. ROOFIN! FELTS IN ROLLS (STORED VERTICALLY). RBBER !OODS. #OOD !OODS OIL AND #A PAPER. CARDBOARD AND PAPER ROLLS (STORED VERTICALLY).

!ROP +/3

FORMS AND PLASTICS (PACKED AND NPACKED) AND ALL PRODCTS PACKED IN FORM MATERIAL. CELLLOSE. #OODEN PALLETS #OODEN BATTENS AND STACKS OF #OOD PENETRABLE TO AIR. CELLLOID. SCRAPS OF PLASTIC OR FORM RBBER AND STORED FOAM ROLLS AND LATE FORM RBBER.

!ROP +/4

FIRE AREA (S%.M)

FIRE PERIMETER (M)

A= *

P=12

A =2'.2+

P=18

A=3,

P=24

A=81

P=3,

A=*

P=12

A=2'.2+

P=18

A=3,

P=24

A=81

P=3,

HEAT RELEASE RATE CONTENTS CRAVED FRNITTRE VEHICLES PETROL PLASTIC STACKED TIMBERS BOOKS FRNITRES STACKED CARDBOARD STACKED CHIPBOARD ELECTRICAL !OODS CARDBOARD CARTONS CARDBOARD REELS PACKED !OODS

HEAT RELEASE RATE (K#/S%.M) 1'' 2,' 3*' *3 32' 8, 31' ,2' 21' +4'

OTHER DATA ON HEAT REALESE PER NIT FLOOR AREA OF FLLY INVOLVED CONBSTIBLES (ASSMIN! 1''6 COMBSTION EFFICIENCY ) IS PRESENTED IN TABLE 41  NFPA 2'4M (1*8,)