MENGHITUNG TEKANAN SATURATED
Rumus :
Psat = exp [C1 + (C2/T) + C3 x ln (T) + C4 x T^C5]
Keterangan:
Psat : tekanan saturated (Pa)
T : temperature (Kelvin)
C1-5 : konstanta Antoine (data dapat dilihat pada perry table 2-6)
Diketahui: Konstanta Antoine komponen ammonia (NH3) sebagai berikut:
C1 = 90,483
C2 = -4669,7
C3 = -11,607
C4 = 1,7194 x 10-2
C5 = 1
* Menghitung P saturated dalam flash drum 110-F
T = 14,4 0C = 287,4 0K
Psat = exp [C1 + (C2/T) + C3 x ln (T) + C4 x T^C5]
= exp [90,483 + (-4669,7/287,4) + (-11,607 x ln 287,4) +( 1,7194 x 10-2 x 287,4)]
= exp [90,483 – 16,248 – 65,706 + 4,942]
= exp [13,471]
= 708.567,0711 Pa
= 7,224 kg/cm2
* Menghitung P saturated dalam flash drum 111-F
T = -8 0C = 265 0K
Psat = exp [C1 + (C2/T) + C3 x ln (T) + C4 x T^C5]
= exp [90,483 + (-4669,7/265) + (-11,607 x ln 265) +( 1,7194 x 10-2 x 265)]
= exp [90,483 – 17,622 – 64,764 + 4,556]
= exp [12,653]
= 312.700,1428 Pa
= 3,188 kg/cm2
* Menghitung P saturated dalam flash drum 112-F
T = -33 0C = 240 0K
Psat = exp [C1 + (C2/T) + C3 x ln (T) + C4 x T^C5]
= exp [90,483 + (-4669,7/240) + (-11,607 x ln 240) +( 1,7194 x 10-2 x 240)]
= exp [90,483 – 19,457 – 63,614 + 4,127]
= exp [11,539]
= 102.641,745 Pa
= 1,046 kg/cm2
