Design / Calculation Sheet
Customer: Plastic-Omnium Proposal / Project No. ES03-2101892
Site: Warrington Created By: JIS Date:25.02.15
Project: Bumper Paintshop Checked By: Date:
Title: Stack Height Calculation
Revision History
Issue Description Name Date
A Initial Issue JIS 25.02.15
PlasticOmnium-Gliwice STACK DATA
Desired Stack Velocity Resulting C.S.A of Stack Diameter of Stack Diameter of
ES03-2101892 (m/s) (m2) (m) Stack (mm)
Item Description Flowrate Operating Flowrate Flowrate 20m/s 15m/s 20m/s 15m/s 20m/s 15/m/s
(Nm3/hr) Temperature (Am3/hr) (Am3/s)
(°C)
1 RTO 3050 - Clean Gas 15 000 100 20 495 5.7 20 15 0.28 0.38 0.60 0.70 700
PlasticOmnium-Gliwice STACK DATA
EVG Fan Size Diameter of Stack
ES03-2101892 (mm)
Item Description Motor Operating Flowrate Pressure from DSOC Efflux Stack height
(KW) Temperature (Am3/hr) (Pa) Velocity above local
(°C) (m/s) building truss
(m)
1 RTO 3050 - Clean Gas 37.0 100 20 495 6 000 700 14.8 3.00
D1 Ref. RTO 3050 - Clean Gas
1.1 Basic data
Discharge volume 20 495 Nm3/hr
Efflux velocity 14.79 m/s
Stack diameter 0.7 m
Efflux temperature 100 degC
Assumed ambient temp 10 degC
1.2 Calculating the Pollution Index STEL Notes
Solvent Content of Paint (subject to confirmation by paint supplyer) % weight mg/m3 STEL data otained from EH40/2005 Workplace exposure limits
Xylene 20% 441
Toluene 20% 384
Heptan-2-One 10% 475
Butyl Acetate 10% 966
MEK 20% 899
Ethanol 20% 1920
100%
Solids Bc Assumption:
Paint Solids 22% Highly developed large
urban area
Total VOC Discharge Rate - g/s 0.110
STEL Gd Bc D Pi
Solvents mg/m3 mg/m3 mg/m3 g/s m3/s
Xylene 966 24.15 0 0.022 0.91
Toluene 384 9.60 0 0.022 2.29
Heptan-2-One 475 11.88 0 0.011 0.93
Butyl Acetate 966 24.15 0 0.011 0.46
MEK 899 22.48 0 0.022 0.98
Ethanol 1920 48.00 0 0.022 0.46
Total 0.110 6.02
Particulates
Particulates not considered for thermal oxidiser exhaust 0 0 0 0.000 0.00
Total 0 0 0 0.000 0.00
Selected Value 6.02
1.3 Calculating the Discharge Height
1.3.1 Calculating U b
V Volume rate of discharge (per stack) m3/s 5.69
Td Temperature of discharge gases K 374
Q Heat Release MW 0.478
a Equation Factor -1.049
b Equation Factor 0.488
Ub Uncorrected Discharge Height m 0.215
Ub Minimum Uncorrected Discharge Height m 1.695
Value for Calculations m 1.695
5.3 Calculating U m
ρd Air Density at discharge conditions kg/m3 0.944
ρa Air Density at ambient conditions kg/m3 1.248
V Volume rate of discharge (per stack) m3/s 5.69
w Stack discharge velocity m/s 14.79
M Discharge Momentum m4/s2 64
logM (logM)2 (logM)3
1.804 3.255494 5.873884
x Equation Factor -1.999
y Equation Factor 4.774
z Equation Factor -8.887
logUm Cannot be Calculated
Um Uncorrected Discharge Height Cannot be Calculated
Um Minimum Uncorrected Discharge Height m 3.10
Value for Calculations m 3.10
5.4 Calculating C - Final Stack Height
U Uncorrected Discharge Height m 1.69
A Stack Height Ratio 1.83
Main Building
H Building Height m 13.5
B Building Width m 150
K Lesser of Building Height or Width m 13.5
T Height of Disturbed Flow m 33.75
U/H 0.126
C Calculated Final Stack Discharge Height m 15.92
C Selected Final Stack Discharge Height m 16.50
Adjoining Buildings
5 x Um m 15.49
