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Thermal
Flowmeter for Gases and Liquids "Cyclone-2M"
Flowmeter
"Cyclone-2M" is intended for calculation of mass and volumetric
flow rates of gases and liquids in wells and transmission
pipelines. It
is capable of taking simultaneous measurements of flows across up to sixteen
pipes.
Flowmeter
"Cyclone-2M" can be mounted on pipelines with
diameters from 100 to 1200 mm. Mass velocity may vary
in pipelines from 0.8 to 300 kg/(m2 s).
The
basic measured value is mass flow.
The volumetric flows may then be calculated by entering (via keyboard)
gas/liquid density values under normal conditions.
The flowmeter also provides:
-
gas/liquid temperature;
- inside pipe pressure;
- current hour/day volume and current time.
All this information are displayed on internal display, can be printed
directly and transfered to computer via USB, RS-232 or RS-485 interfaces.
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Equipment kit
| Flowmeters
"Cyclone-2M" consist of the main unit (BI-2M) and one
to sixteen transducers (D2). |
The
main unit BI-2M includes the following basic functional units:
- single-chip microcomputer;
- analogue-digital converter;
- crystal-liquid graphic display;
- keys and multiplexers for switching signals;
- power supplies for all units;
- galvanic isolating device;
- current and voltage limit circuits. |
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BI-2M devices
are produced as desktop, wall-mounted and as a portable units and they
are explosion proof both indoors and outdoors.
Distance between main unit and transdusers can be up to 200 meters.
D2 devices are connected to the pipelines. The measuring zone needs to
be chosen on a direct section of pipe, whose length before the measuring
section should be as long as possible.
Advantages
-
multichanneling (up to 16 measuring units!);
- a wide range of measured flow rates;
- measurements are carried out without reduction of the pipeline
capacity;
- absence of throttling devices and mobile elements in flow;
- convenience and rapid installation and dismantling;
- competitive price. |
Physical
principles
Flow
rate calculations by "Cyclone-2M" are based on the quantity
of heat carried away from a special transducer submerged into the
flow as a thermal probe.
Transducer design provides thermal probe placement into the flow
of gas within a specially arranged measurement zone - flow divider
- instead of being submerged into the main flow.
This allows to reduce energy consumption involved in the measurement
process.
High energy consumption values have been the basic reason for only
occasional practical use of thermal flowmeters, despite their excellent
accuracy characteristics.
Therefore, the reducing process (i.e. the process of transition
of gas or liquid from the main flow to the measurement flow) performs,
at the same time, the filtering function, i.e. no solid particles,
such as sand, may penetrate in the measurement flow by virtue of
a delayed action. |
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Applications
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"Cyclone-2M"
flowmeters are mainly used in the following areas:
- oil
and gas production and transportation;
-
chemical industry;
- undergoung
gas storage;
-
metallurgical and sintering plants;
-
environmental monitoring.
In particular, "Cyclone-2M" has been chosen for every
underground gas storage being built now in the Ukraine.
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Specifications
| Relative
measurement error (in respect of case-type version) |
-
1 % in interval of flow rates from 0.2 Qmax to Qmax
- 2 % in interval from Qmin to 0.2 Qmax |
| Range
of measured flows (Min/Max) |
1:10
for fluid ; 1:20 for gas |
| Permissible
operating pressure |
32
MPa |
| Data
storage time in power-independent memory |
15
days |
| Duration
of single measurement cycle when 16 transducers are polled |
from
1.5 to 7.5 minutes, depending on measured flow |
| Range
of measured temperatures |
from
-50 to +120 C |
Range
of environment temperatures:
- for transducer
- for measurement unit |
from -50 to +80 C
from +5 to +50 C |
| Power
consumption max. |
50
W |
| Supply
voltage |
220
V, 50 Hz |
| Measurement
unit overall dimensions |
230x130x90
mm |
| Mass
of measurement unit |
6.5
kg |
| Transducer
dimensions |
Transducer
is screwed into standard boss (thread 27x2 mm); length of transducer
depends on pipeline diameter |
| Mass
of transducer |
max.
2.0 kg |
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