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HVAC CALC.
4
AHMED ATTA PRESSURIZATION FAN RATE CALCULATIONS INSERT VALUE CLOSED DOORS ZONE Psbt MIN PRESSURE DIFFERENCE AT TOP 13 Pa according to IBC 2006 and NFPA 92A AS sprinkled building this calculation based on summer conditions PERIMETER WALL AREA 700 M2 PERIMETER STAIR AREA 60 M2 Asb 0.0306 M2 Abo 0.147 M2 Toutside 35 C Tstair 30 C B -0.185376 Pa/m FLOOR HEIGHT 2.5 M No OF TOTAL FLOORS 13 No OF FLOORS ABOVE GROUND 5 Y 12.5 M Psbb PRESSURE DIFFERENCE AT BOTTOM 15.220958 Pa N1 No OF FLOORS AT CLOSED DOOR ZONE 10.5 Q1 FLOW RATE 1.0117482 M3/s OPENED DOORS ZONE Asb FOR OPENED DOOR 1.8 M2 Abo 0.21 M2 N No OF FLOORS AT OPENED DOOR ZONE 0.5 Psot PRESSURE DIFFERENCE AT TOP 13.563315 Pa minimum pressure diffrence Psob PRESSURE DIFFERENCE AT BOTTOM 15.880511 Pa pa in.w. mm.w. total CFM 37 0.148 3.7 35241 20 0.08 2 29484 13 0.052 1.3 26620 IBC 2006 10 0.04 1 25240 Asboe EFFECTIVE AREA 0.2085853 M2 Q2 FLOW RATE 0.3354491 M3/s EXTERIOR DOOR ZONE C FLOW COEFF. 0.65 AIR DENSITY 1.2 Kg/m3 Aso FLOW AREA(DOOR AREA) 1.8 M2 Psb AT EXTERIOR(GROUND) 15.220958 Pa Psbo 15.880511 Pa Q3 FLOW RATE 6.0192513 M3/s ZERO IF THE DOOR OPENS AT A SIMPLE LOBBY FIRE DOOR ZONE HEIGHT OF THE DOOR 2M Ts TEMPERATURE OF SMOKE 250 C To TEMPERAURE OF AMBIENT 30 C V AIR VELOCITY 109.97518 M/min V AIR VELOCITY 1.8329196 M/sec Q4 FLOW AIR 3.2992554 M3/s Q FLOW AIR TOTAL 10.665704 M3/s ΔP sb = ΔP so 1+ ( A sb A bo ) 2 Q 1 = 0.599 N 1 A sb ( ΔP sbt 3/ 2 − ΔP sbb 3/ 2 ΔP sbt − ΔP sbb ) ΔP sbt = ΔP sbb + BY 1 +( A sb / A bo ) 2 A sboe = A sb A bo √ A sb 2 + A bo 2 Q 2 = 0.559 N 2 A sboe ( ΔP sot 3/ 2 − ΔP sob 3 /2 ΔP sot − ΔP sob ) Q 3 = CA so √ 2 ΔP so ρ V = 119.9 [ h [ T f − T o ] / T f ] 1/2 Q 4 = VA sb B= 3460 ( 1 T o − 1 T s ) ΔP sot = ΔP sob + BY
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Transcript of HVAC CALC.
AHMED ATTA
PRESSURIZATION FAN RATE CALCULATIONS
INSERT VALUE
CLOSED DOORS ZONEPsbt MIN PRESSURE DIFFERENCE AT TOP 13 Pa according to IBC 2006 and NFPA 92A
AS sprinkled buildingthis calculation based on summer conditions
PERIMETER WALL AREA 700 M2PERIMETER STAIR AREA 60 M2Asb 0.0306 M2Abo 0.147 M2Toutside 35 CTstair 30 C
B -0.1853757 Pa/mFLOOR HEIGHT 2.5 MNo OF TOTAL FLOORS 13No OF FLOORS ABOVE GROUND 5
Y 12.5 M
Psbb PRESSURE DIFFERENCE AT BOTTOM 15.220958 PaN1 No OF FLOORS AT CLOSED DOOR ZONE 10.5
Q1 FLOW RATE 1.0117482 M3/s
OPENED DOORS ZONEAsb FOR OPENED DOOR 1.8 M2Abo 0.21 M2N No OF FLOORS AT OPENED DOOR ZONE 0.5Psot PRESSURE DIFFERENCE AT TOP 13.563315 Pa minimum pressure diffrencePsob PRESSURE DIFFERENCE AT BOTTOM 15.880511 Pa pa in.w. mm.w. total CFM
37 0.148 3.7 3524120 0.08 2 2948413 0.052 1.3 26620 IBC 200610 0.04 1 25240
Asboe EFFECTIVE AREA 0.2085853 M2
Q2 FLOW RATE 0.3354491 M3/s
EXTERIOR DOOR ZONEC FLOW COEFF. 0.65AIR DENSITY 1.2 Kg/m3Aso FLOW AREA(DOOR AREA) 1.8 M2Psb AT EXTERIOR(GROUND) 15.220958 PaPsbo 15.880511 Pa
Q3 FLOW RATE 6.0192513 M3/s ZERO IF THE DOOR OPENS AT A SIMPLE LOBBY
FIRE DOOR ZONEHEIGHT OF THE DOOR 2 MTs TEMPERATURE OF SMOKE 250 CTo TEMPERAURE OF AMBIENT 30 C
V AIR VELOCITY 109.97518 M/minV AIR VELOCITY 1.8329196 M/sec
Q4 FLOW AIR 3.2992554 M3/s
Q FLOW AIR TOTAL 10.665704 M3/s22599.347 CFM
ΔPsb =ΔPso
1+( A sbAbo )2
Q1 = 0 .599N1 Asb ( ΔPsbt3 /2 − ΔP sbb3/2
ΔPsbt − ΔPsbb )
ΔP sbt = ΔPsbb +BY
1 + (A sb / Abo)2
A sboe =A sb Abo
√A sb2 +Abo2
Q2 = 0.559N2 A sboe ( ΔPsot3/2 − ΔP sob3/2
ΔPsot − ΔPsob )
Q3 = CA so √ 2 ΔPsoρ
V = 119.9 [h [T f − T o ] /T f ]1/2
Q4 = VA sb
B= 3460 ( 1T o − 1T s )
ΔPsot = ΔPsob + BY
F52
asmaa-m:
AHMED ATTA
Q FLOW RATE AT EACH FLOOR 1738.4113 CFM
AHMED ATTA
SMOKE EXHAUST FLOW RATE
INSERT VALUE
Q HEAT REALESED 500 KW
Qc CONVECTIVE HEAT 350 KW
1
Zf LIMITING FLAME HEIGHT 1.72876 MZ CLEAR FLAME HEIGHT 5 M
Mp MASS FLOW RATE 7.94528 Kg/sec
Ta AMBIENT TEMPERATURE 30 CTp TEMPERATUE OF PLUME 74.0513 CR SMOKE DENSITY 1.01728 Kg/m3
V' FLOW RATE 7.81031 M3/sec
SMOKE FAN FLOW RATE 16,549 CFM
k WALL FACTOR
Qc= ξQ
z1=0 .166 (Qc/k )0 .4
m.=0 .071K2/3Qc1 /3Z
5/3+0 .0018Q c
ΔT =Qcm.Cp
V .=m. (T p + 273)353
AHMED ATTA
