STEAM FLOW METER THERMAX LIMITED C&H, SERVICES SBU MONITORING - - PowerPoint PPT Presentation

ORIFICE TYPE

STEAM FLOW METER

THERMAX LIMITED C&H, SERVICES SBU

COMMITTED TO DELIVER INNOVATIVE ENERGY SOLUTIONS

MONITORING IS THE FIRST STEP TO SAVING MONEY

Steam measurement objectives

To ensure steam generated by the boiler fulfils its design norms To establish steam consumption of the plant To estimate / establish steam consumption per batch of product To establish product/process specific steam consumption To establish steam losses, if any in process/plant To save money by plugging the losses

COMMITTED TO DELIVER INNOVATIVE ENERGY SOLUTIONS

MONITORING IS THE FIRST STEP TO SAVING MONEY

Methods of measurement

Orifice plate with differential pressure transmitter

(DPT)

Velocity proportional to Square Root of DP

Vortex type

Based on vortex shedding Flow to be fully turbulent High Cost Frequent Calibration Required

COMMITTED TO DELIVER INNOVATIVE ENERGY SOLUTIONS

MONITORING IS THE FIRST STEP TO SAVING MONEY

Principle of Operation

• When steam passes through a restriction like an orifice plate installed in

a pipeline, pressure drop occurs. A Differential pressure transmitter measures DP across the orifice

• Steam flow is proportional to square root of this pressure drop
• Density of a compressible fluid like steam is a function of pressure and

temperature

• The above input is taken in to computation unit by providing pressure

and temperature sensors

• The steam flow indicated is fully compensated for variation in density due

to temperature and pressure variations.

• Mass flow is calculated and values for both instantaneous and totalised

steam mass flow displayed

COMMITTED TO DELIVER INNOVATIVE ENERGY SOLUTIONS

MONITORING IS THE FIRST STEP TO SAVING MONEY

Flow meter Selection Criteria

• Online density compensation
• Ease of maintenance
• Flow range
• Line size
• Steam pressure
• Steam quality – Dryness fraction of saturated steam
• Power supply
• Turndown
• Accuracy
• Mass flow computation
• Ease of Calibration at site
• Display requirement – Remote / multi-channel / PLC
• Low cost
• Large LED display
• IBR certification
• Tamper proof programming
• Vast & reliable service network

COMMITTED TO DELIVER INNOVATIVE ENERGY SOLUTIONS

MONITORING IS THE FIRST STEP TO SAVING MONEY

Typical Schematic

Pressure Transducer Computational & display unit Differential pressure transmitter Orifice plate RTD Condensate pot Steam line

COMMITTED TO DELIVER INNOVATIVE ENERGY SOLUTIONS

MONITORING IS THE FIRST STEP TO SAVING MONEY

Installation of RTD

5 x D D ∠45°

Steam flow

COMMITTED TO DELIVER INNOVATIVE ENERGY SOLUTIONS

MONITORING IS THE FIRST STEP TO SAVING MONEY

Material of Construction

Orifice plate

SS 316

Impulse tubing

SS 304

Flanges

ANSI 300#, WNRF, IBR

Condensate pots

ASTM A106 Gr B, IBR

Isolation valves

CS, IBR

Three way manifold

SS 304

Needle valve with plugs

SS 304

Compression ferrule fittings

SS 304

RTD sensor - Thermowell

SS 304, IBR

Adaptor/Tee/Cross/Coupling

SS304

COMMITTED TO DELIVER INNOVATIVE ENERGY SOLUTIONS

MONITORING IS THE FIRST STEP TO SAVING MONEY

Computational & Display Unit

Display – 4 digit (instantaneous) / 6 digit (Totalized), o.5 inch height x 7 segment LED with programmable decimal point position Mounting – Wall mounting Protection class – IP 65 equivalent Enclosure – Aluminium Die-cast Operating Ambi temperature – 50 deg C Maximum media temperature – 600 deg C Maximum media pressure – 100 bar

COMMITTED TO DELIVER INNOVATIVE ENERGY SOLUTIONS

MONITORING IS THE FIRST STEP TO SAVING MONEY

Power Supply & Display options

Power supply options

240V/ AC/50 / 60 HZ 115 V AC 50/60HZ - Optional

Display instantaneous & totalized

Remote, wall mounted as standard PLC connectivity on request

COMMITTED TO DELIVER INNOVATIVE ENERGY SOLUTIONS

MONITORING IS THE FIRST STEP TO SAVING MONEY

Advantages

• Equipped with on-line density compensation
• Displaying instantaneous, Totalized flow, steam pressure &

steam temperature

• Special computer designed orifice plate ensure accurate

measurement

• SS tubing and compression fittings – easy to install
• High accuracy, moderate turn down, at low cost
• Accuracy can be maintained at +/- 0.25% on full scale
• Large 7 segment LED display, easy to read
• Featured with indication of superheated or wet steam when

the temperature crosses +/- 7 deg C from saturation level

• Supplied with SMPS which can accept wide voltage

variation from 85 to 265 V

• Featured with error diagnostics with alarm
• utput as option

COMMITTED TO DELIVER INNOVATIVE ENERGY SOLUTIONS

MONITORING IS THE FIRST STEP TO SAVING MONEY

USP of Thermax Steam flow meter

• Rugged design, fit & forget type
• 3 level password protection ensures no tampering by unauthorized persons
• User friendly programmable display unit, hence easy to install & recalibrate

at site

• User has 4 alternatives for density compensation thus ensuring flow

measurement even if one of the component fails. The alternatives include,

• Pressure compensation
• Temperature compensation
• Pressure &temperature compensation
• Uncompensated mode
• Low cost solution with accurate flow measurement
• Retransmission to PLC/PC on MODBUS RTU protocol, RS232 or RS485
• Zero maintenance cost due to zero moving part

COMMITTED TO DELIVER INNOVATIVE ENERGY SOLUTIONS

MONITORING IS THE FIRST STEP TO SAVING MONEY

Any feedback please contact, info.c&hservices@thermaxindia.com

THANK YOU