sq - flow monitoring for waste water, sewage systems and ... · treatment plants irrigation...
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SQ - Flow monitoring forwaste water, sewage systems and industrial effluent
Non-contact flow measurement with radar
SOMMER non-contact flow measurement (SQ-3, SQ-6, SQ-8R)
Relatively new measurement system
System: radar technology
Mounted outside of the water body! easy
mounting on ceiling or put into a manhole
Contact-free measurement
! Maintenance free (because not in the water)
Non-contact flow measurement with SQ
Radar sensor for measuring flow velocity (yellow beam) Level (green beam) Automatic calculation of discharge! With given cross-section profile
Advantages
Non-contact measurement
Maintenance free (no soiling), no risk of damage
Continuous measurement
Monitoring of very little discharge rates possible
Accurate flow measurement also with high turbidity and solid contents in the wastewater
SQ Flow Meter - Measurement Principle
Water level (stage)Transit time measurement
Radar (26 GHz) or Ultrasonic
Vertical to water surface
Time between transmitting and reflecting the pulse = directly proportional to the distance
Radar: independent of air temperature and medium (e.g. foam)
Measurement of Doppler frequency shift (Doppler Effect)
Radar impulse (24 GHz) are shifted by the water surface waves
Frequency shift by movement on the water surface (min. swell 3mm )
Measurement of surface velocity, calculation of mean velocity with hydraulic model
SQ Flow Meter - Measurement Principle
Flow velocity
Discharge calculation
local velocity vl
measurement spot
Discharge (Q)
cross section profile
Continuity Equation:Q = vm * A(W)
water levelmeasurement
water area A(W)
vm = vl * k
mean velocity vm
k Factor
Discharge calculation
local velocity vl
measurement spot
Discharge (Q)
cross section profile
mean velocity vm
k Factor
Continuity Equation:Q = vm * A(W)
water levelmeasurement
wetted area A(W)
cross section profile
Local velocityvl
k-Factork (W)
AreaA (W)
Mean velocityvm
DischargeQ
definedmeasured calculated
Water levelW
Equation used in the SQ:Q = vl * k * A(W)
Q = volume flow vl = local velocity k = k factorA = water area
k-factor is depending on the site characteristics
Automatic k factor calculation is done in Q-Commander software
k factor download in the SQ
Discharge calculation done by SQ
SQ output discharge
Q – Commander software – Hydraulic model
Cross section profile
K-factors in different water levels
Q – Commander software - profiles
Diverse profile options- Egg shapes, circle, others
- Trapezoid, rectangular
SQ ADVANTAGES
10
SQ Flow Meter - Advantages
Advantages installation:
Compact design
Easy installation
No structural work in the water necessary
Not in contact with the water
No fouling
Mounting cube for variabel installation vertically andhorizontally included
SQ Flow Meter - Advantages
Advantages design:
If sensor get submerges, no cleaning necessary
Waterproof and tight housing IP 68
Seawater and Gas resistant
Very light Plastic / fiberglass housing
Air pockets to keep the
sensors areas clean
SQ Flow Meter - Advantages
Advantages, compared to water level sensor as flowmeter:
Higher accuracy, because velocity and level measurement
Detection of backwater and flow stop- Detection of blockages
No flume necessary
Direct output of flow rate from the SQ Sensor- No controller needed
Detection of silt accumulation in the channel /pipe
Detection of change from Normal flow to supercritical flow- close to an outfall.
SQ Flow Meter - Advantages
Advantages compared to submerged ultrasonic sensor:
Easier installation- outside of the water
No cleaning necessary- no maintenance
Measurement Not effected by turbidity or solids
No minimum water level
SQ Flow Meter - Advantages
Advantages compared to other non contact flow meters:
Certified velocity measurement
Hydraulic model for higher accuracy
Discharge calculation inside the SQ
Measurement not effected by vapor, steam, Sand storms, temperature rain or snowfall
Real time measurement
More than 5000 installation world wide
Intelligent machine learning feature
SQ Flow Meter - Advantages
Hydraulic Advantages:
Recognition of dynamic processes in the water body
– Hysteresis
– changing of the cross section (e.g. silt accumulation)
– Change from normal flow to super and sub critical flow
– Tide effects
Sensor not change the flow - outside of the water
SQ Flow Meter - Advantages
Advantage, simple integration in existing monitoring and control systems:
Digital interface 1 x SDI-12; 1 x RS 485 or Modbus
– Protocol: various ASCII-protocols
– Output: discharge, flow velocity, level, quality parameters
Pulse output Pulse per volume (selectable units)
Analog output (optional) 2 x 4 ... 20 mA (1x level; 1x discharge or velocity selectable)
Profibus, ProfiNet, CANopen, Ethercatinterface via converter possible
Possible to connect SOMMER data logger to store and transmit measurement data via mobile internet
SQ INSTALLATION IN SEWER SYSTEMSAND MANHOLES
18
SQ Flow Meter – Installation in sewer systems
Easy installation on the sealing or in the manhole
Gas and water proof
Easy connection to local data recorder or control system
Detection of blockage and flow stop
Special echo optimization
Measurement not effected by spider Webs
Possible to measure Pipes with a diameter of only 200mm
Sewer systems
SQ Flow Meter – Installation in manhole
Safety is a big concern
Installation without entering the manholeMounting bracket available for manholes
Adjustable to different diameters of manholes
Costs of installation and maintenance can be reduced
Easy installation and fast
Flexible system till 10m depth
SQ Flow Meter – Installation in manhole
- Display, data logging and data transmission included
- IP 68 – strong and independent measurement system
MRL-6- display- data loggingor
MRL-7- display- data logging- transmission
Installation bracket for manholes
Battery pack- 22 Ah- Lasts 10 weeks (with meas. interval 5 min; 4x data transfer per day)
SQ flow meter- analog or digital- SQ-3, SQ-6, SQ-8R
Options:- camera- Solar panel
SQ Flow Meter – Installation in manhole
SQ IN OPEN CHANNELS
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SQ Flow Meter – Installation in open channels
In- or outlet of industrial installation or water treatment plants
Irrigation channels
No Weather influence- SQ is designed to withstand 75° of temperature- Sand storms, rain and snow not effect the measurement- Sea water and Gas resistant
No limit in the channel size
SQ Flow Meter – Installation in open channels
Flexible system for remote / independent deployment
Data logger with data transfer via mobile internet and/or Satellite
Independent power supply through solar power
Remote access to the site via internet (only with SOMMER data logger)
Possible to attach a camera (pictures are send via internet)
Android APP
Sommer monitoring station:
SQ Flow Meter – Installation in open channels
Possible to intergrade different sensors like:- PH- Conductivity- salinity- Turbidly- …
Connection to most water analysers possible
Stainless steel and fiberglass enclosure (sea water resistant)
Sommer monitoring station:
SQ Flow Meter – Installation in open channels
SQ-EXAMPLE INSTALLATIONS AND DATA COMPARISON
29
ARA Vorderland
Wastewater treatment plant (ARA):– inhabitants connected: 13.500
Villages: Klaus, Weiler, Sulz, Röthis
– Possible connections: 27.000
Conditions:– Inlet channel (after raw rake)
– Current sensor in use: submerged ultrasonic sensor
Sommer installation:– SQ-3a + MRL-6
– Installation July 2016 – still running
– Data transmission to MDS
ARA Vorderland
ARA Vorderland
-30,00
-20,00
-10,00
0,00
10,00
20,00
30,00
40,00
-
2000,0
4000,0
6000,0
8000,0
10000,0
12000,0
14000,0
16000,0
01.0
8.2
016
02.0
8.20
16
03.0
8.2
016
04.0
8.2
016
05.0
8.2
016
07.0
8.2
016
08.0
8.2
016
09.0
8.2
016
10.0
8.2
016
11.0
8.2
016
12.0
8.2
016
13.0
8.2
016
14.0
8.20
16
15.0
8.2
016
16.0
8.2
016
17.0
8.2
016
18.0
8.2
016
19.0
8.2
016
20.0
8.2
016
21.0
8.2
016
22.0
8.2
016
23.0
8.2
016
24.0
8.2
016
25.0
8.20
16
26.0
8.2
016
27.0
8.2
016
28.0
8.2
016
29.0
8.2
016
30.0
8.2
016
31.0
8.2
016
-
dif
fere
nce
in p
erce
nt
dis
char
gep
er
day
m³
date
Comparison Daily Discharges August 2016
submerged ultrasonic sensor vs. non-contact radar SQ
dischargeultrasonicmouse [m³]
dischargeSQ-3 [m³]
Difference [%]
ARA Vorderland
Comparison Discharges August
submerged ultrasonicsensor m³ SQ m³ Difference [%]
Monthly sum 141,068 142,168 0.77
Comparison Measurement with TQ Tracer
Measurement on 12th of September
SQ-3 radar discharge sensor:30.80 l
TQ-S salt tracer:Probe A: 29.46 l/sProbe B: 29.99 l/s
PLC (ULS-sensor): 29 l/s
ARA Hohenems
Wastewater treatment plant (ARA):– Inhabitants connected: 40.000
Villages: Koblach, Altach, Mäder, Hohenems
– Possible connections: 170.000
Conditions:– Effluent to channel Kobler Kanal
– Current sensor in use: submerged ultrasonic sensor
Sommer installation:– SQ-3a + MRL-6
– Installation Mai 2016 – still running
– Data transmission to MDS
ARA Hohenems
ARA Hohenems
-25
-20
-15
-10
-5
0
5
10
15
20
25
30
35
40
0
5.000
10.000
15.000
20.000
25.000
30.000
35.000
40.000
45.000
50.000
55.000
60.000
65.000
70.000
75.000
80.000
85.000
90.000
95.000
100.000
01.0
8.2
016
02.0
8.2
016
03.0
8.2
016
04.0
8.2
016
05.0
8.2
016
06.0
8.20
16
07.0
8.2
016
08.0
8.2
016
09.0
8.2
016
10.0
8.2
016
11.0
8.2
016
12.0
8.2
016
13.0
8.20
16
14.0
8.2
016
15.0
8.2
016
16.0
8.2
016
17.0
8.2
016
18.0
8.2
016
19.0
8.2
016
20.0
8.2
016
21.0
8.2
016
22.0
8.2
016
23.0
8.20
16
24.0
8.2
016
25.0
8.2
016
26.0
8.2
016
27.0
8.2
016
28.0
8.2
016
29.0
8.2
016
30.0
8.20
16
31.0
8.2
016
dif
fern
ce in
pe
rce
nt
dis
char
ges
pe
r d
ay m
³
date
Comparison Daily Discharges August 2016
submerged ultrasonic sensor vs. non-contact radar SQ
dischargeultrasonicmouse [m³]
discharge SQ[m³]
Difference[%]
ARA Hohenems
Comparison Discharges August
submerged ultrasonicsensor m³ SQ m³ Difference [%]
Monthly sum 600,234 606,861 1.1
Sewer system Koblach, Austria
Sewer system Koblach – discharge 3 days
Sewer system Koblach – discharge 30 days
Questions?
Thank You!