It is pdf file of the control valve sizing program I made. You can mail me on upedra038@gmail.com to obtain a copy in excel file. There is a limitation of Slideshare on not to share excel file.
1. CONTROL VALVE SIZING-Gas
CONTROL VALVE SIZING: GAS/VAPOR (scfh, lb/hr) Conversion factors
Flow Volume (-Mass) scfh FLOW 65000 Volumetric flow to scfh CQ 1
Inlet temperature F T_1 100 mass flow to lb/hr CW 1
Inlet pressure psia P_1 100 temp to deg F (multiplier) CTM 1
Delta P psi DP 40 temp to deg F (adder) CTA 0
Sp. G (-Vapor Sp. Wt.) lf/ft3
G_SW 1 Pressure to psi CP 1
Ratio of Sp. Heats K 1.4 Density (spec. wt.) to lb/ft
3
CD 1
Gas Compressibility Z 1 Diameter, thickness to inch CI 1
Viscosity cs (-cp) cp VISC 15.1 specific gravity G_G 1
Term pressure drop ratio X_T 0.7 Kinematic viscosity @ std cond NU 15.1
Recovery factor F_L 0.9 Flow converted to scfh Q 65000
Valve style modifier F_D 1 Cv used in iterative cals CV_I 22.5400000
Inlet pipe diameter inch D_1 2 upstream reducer head loss coef. K_1 0.095703125
Outlet pipe diameter inch D_2 2 Dnsteam reducer head loss coef. K_2 0.19140625
Valve size inch D_V 1.5 Upstream reducer Bernoulli coef. K_B1 0.68359375
Pipe wall thickness inch T_P 0.154 Dnstream reducer Bernoulli coef. K_B2 0.68359375
Required Cv 22.540 Piping geometry factory FP 0.984195582
Noise Level dBA 83.397813 Reducer corrected X_T X_TP 0.685153339
Outlet Velocity Mach 0.3344318 Valve Reynolds number RE_V 2057700.81
Valve Reynolds no. 2057700.8 Valve capacity coef. (Cv/d2
) _C 10.01777778
Valve capacity coef. w/limits C_L 10.01777778
Transitional flow exponent _N 16.18182197
Transitional Reynolds factor F_RT 1.389830345
Laminar Reynolds factor F_RL 111.1172391
Reynolds factor F_R 1
Pressure drop ratio (DP/P_1) _X 0.4
Expansion factor _Y 0.80539636
Q Calc (turbulent) based on Cv_1 Q_CT 64941.13524
Q Calc (non-turb) based on Cv_1 Q_CNT 73379.74062
Calc flow (turb) in input units FLO_T 64941.13524
Calc flow (non turb) in input units FLO_NT 73379.74062
Diff between FLOW & FLO_T DEL_T 0.000905612
Diff between FLOW & FLO_NT DEL_NT 0.128919087
Required valve Cv CV_R 22.54
Test for missing input data INTEST 3.20E+09
NOISE CALCULATIONS
Dia. Of downstream pipe in inch D_I 2
Pipe wall thickness in inch T_PI 0.154
P_1 converted to psi P_1P 100
P_2 converted to psi P_2P 60
Vena contracta press (Sub sonic) P_VC 50.61728395
Vena contracta press (Critical) P_VCC 52.8
P_2 at critical flow P_2C 61.768
CV Calc (Turbulent
flow Re>5000)
CV Calc (Laminar flow
Re<5000)
2. CONTROL VALVE SIZING-Gas
Alpha ALPHA 0.854811553
P_2 at break bet Regime 3 & 4 P_2B 36.03133333
P_2 at beginning of Regime 5 P_2CE 5.317493113
Modified accoustic eff. Regime 1 ETA_M1 -41.19397031
Modified accoustic eff. Regime 2 & 3 ETA_M2 -40.44849512
Modified accoustic eff. Regime 4 ETA_M4 -34.32985898
Modified accoustic eff. Regime 5 ETA_M5 -23.80541584
Modified accoustic eff ETA_M -40.44849512
Trans. Loss @ coincidence freq. T_LFO 67.30014713
Mach no. in freely expanded jet M_J 1.025703784
Diameter of jet D_J 0.067559973
Frequency, Peak inside pipe F_P 3431.15966
Frequency, coincidence F_O 7850
T_LFP if E_P <= F_O T_LFPA 7.18857459
T_LFP if E_P <= 4*F_O T_LFPB -4.672573484
T_LFP if E_P > 4*F_O T_LFPC -11.42977442
Correction F_P & F_O ratio T_LFP 7.18857459
Transmission loss T_L 74.48872172
pipe velocity correction L_G 1.502153371
SPL internal L_PI 151.3843817
A weighted sound level L_A 83.39781334
3. CONTROL VALVE SIZING-Liquid
CONTROL VALVE SIZING: LIQUID Conversion factors
Flow gpm L_Q 140 Flow to gpm L_CQ 1
Inlet pressure psia L_P_1 100 Pressure to psi L_CP 1
Delta P psi L_DP 77 Dia to inch L_CI 1
Specific gravity L_G_F 1 Ft/sec to Velocity L_CVEL 1
vapor pressure psia L_P_V 1 Cv used in iterative calcs L_CV_I 16.07
Critical pressure psia L_P_C 3208 upstream reducer head loss coef. L_K_1 0.095703125
Kinematic viscosity cs L_NU 1 Dnsteam reducer head loss coef. L_K_2 0.19140625
Recovery factor L_F_L 0.9 Upstream reducer Bernoulli coef. L_K_B1 0.68359375
Valve style modifier L_F_D 1 Dnstream reducer Bernoulli coef. L_K_B2 0.68359375
Inlet pipe diameter inch L_D_1 2 Piping geometry factory L_FP 0.991872181
Outlet pipe diameter inch L_D_2 2 FL (vlv + reducer)* FP L_FLP 0.884148012
Valve size inch L_D_V 1.5 Recovery factor of valve+reducer L_FLPFP 0.891393094
Valve style SPL code L_S 0 critical pressure ratio factor L_FF 0.955056428
pipe wall correction dBA L_D_LP -2 Choked delta P L_DP_CH 78.69929449
Required Cv 16.07 Delta P to be used in calcs L_DP_CAL 77
Choked delta P psi 78.69 / Non Choked Valve Reynolds no. L_RE_V 636861.4271
Noise Level dBA 69.0599569 Valve capacity coef. (Cv/d
2
) L_C 7.142222222
Inlet velocity ft/sec 25.3968254 Valve capacity coef. w/limits L_C_L 10
Valve Reynolds no. 636861.4271 Transitional flow exponent L_N 15.70404495
Transitional Reynolds factor L_F_RT 1.302799923
Laminar Reynolds factor L_F_RL 61.92759213
Reynolds factor L_F_R 1
Q Calc based on Cv_1 L_Q_CALC 139.867544
Abs Diff between Q & Q_CALC L_DELTA 0.000946114
Required valve Cv L_CV_R 16.07
Test for missing input data L_INTEST 1.87E+10
Choked flow status L_CH_ST Non Choked
NOISE CALCULATIONS
Incipent cavitation indices
valve code 0 (Globe) L_Z_0 0.348362078
valve code 1 (Eccentric plug) L_Z_1 0.343998238
valve code 2 (segment ball) L_Z_2 0.358476009
valve code 3 (Butterfly) L_Z_3 0.301332136
valve code 4 (Ball) L_Z_4 0.391418402
Incipent cavitation index selected by S L_Z 0.348362078
Pressre drop ratio L_X_F 0.777777778
Scaled pressure drop ratio, X_F>Z L_X_R 0.65897899
Hydrodynamic noise coef
valve code 0 (Globe) L_DLF_0 -7.35377765
valve code 1 (Eccentric plug) L_DLF_1 -7.35377765
valve code 2 (segment ball) L_DLF_2 6
valve code 3 (Butterfly) L_DLF_3 2
Cv Calculation
4. CONTROL VALVE SIZING-Liquid
valve code 4 (Ball) L_DLF_4 3.953873941
Hydrodynamic noise coef selected by S L_DLF -7.35377765
common portion of SPL calc. L_SPL_C 49.10671355
SPL if X_F<=Z L_SPL1 55.3855574
SPL if X_F>Z L_SPL2 69.0599569
Sound Pressure Level L_SPL 69.0599569
5. CONTROL VALVE SIZING-TwoPhase
CONTROL VALVE SIZING: TWO PHASE (scfm/gpm, -lb/hr) Conversion factors
Liquid data Liq vol flow to gpm TP_CLQ 1
Flow, Vol (-mass) LFLO -15000 Liq mass flow to lb/hr TP_CLW 1
SP. G. lb/ft3 LGSW 1 Gas vol flow to scfh TP_CGQ 1
Vapor pressure psia TP_P_V 0.5 Gas mass flow to lb/hr TP_CGW 1
Critical pressure psia TP_P_C 3208 Temp to deg F (Multiplier) TP_CTM 1
Recovery factor TP_F_L 0.9 Temp to deg F (adder) TP_CTA 0
Gas data Pressure to psi TP_CP 1
Flow, Vol (-mass) GFLO -1400 Density (spec wt) to lb/ft3 TP_CD 1
SP. G. lb/ft3 GGSW 1 Specific wt of liquid (lb/ft3) TP_SPW_L 62.37
Ratio of sp. Heats TP_K 1.4 Specific wt of gas (lb/ft3) TP_SPW_G 0.5
Term pres drop ratio TP_X_T 0.7 Liquid flow in lb/hr TP_W_L 15000
Common data Gas sp. G to convert flow to mass TP_G_G 1
Inlet temperature F TP_T_1 80 Gas flow in lb/hr TP_W_G 1400
Inlet pressure psia TP_P_1 100 Liquid choked DP TP_DPC_L 80.612616
Delta P psi TP_DP 40 Gas choked DP TP_DPC_G 70
Liquid mass flow fraction TP_FL 0.9146341
Required Cv 21.48962 Gas mass flow fraction TP_FG 0.0853659
Choked Delta P psi 79.70666 Two phase choked DP TP_DPC_2P 79.706661
Pressure drop to use in Cv calc TP_DP_CAL 40
Pressure drop ratio TP_X 0.4
Expansion factor TP_Y 0.8095238
Equivalent Specific wt (lb/ft3) TP_SPW_E 3.6338138
Required Cv TP_C_VR 21.489623
