Steam is often described as the 'lifeblood' of industry. One of the most popular means of providing energy to a process and its associated operations, heat from a boiler converts into an easily transportable form. Whether it is for office heating or providing mechanical energy to turbine generators, steam is a powerful power source that plants and refineries require to maintain a smooth operation.
Measuring energy consumption is paramount in improving energy efficiency; efficient and accurate metering will not only determine excess use and illustrate where the steam is used but will also positively affect bottom-line profitability.
Infinitely scalable, most boiler systems can be ramped up or down depending on facility needs. This can include low flows during startups to higher flows during full operation, and then back to low flows for downtime and/or maintenance. Steam systems are only as good as their processes. Accurate steam measurement controls boiler efficiency, safety, and provides the data to best inform cost and product quality decisions. Selecting the correct flow meter for the application that is cost-effective and scalable to these changing conditions is a challenge.
A traditional orifice flow meter is not suitable for low flow measurement and accessory equipment (impulse line, condensation tank, etc) is required to realize steam flow rate measurement.
In order to maintain the turn downs with an orifice, the plate must be replaced periodically to avoid deterioration accuracy by abrasion.
Furthermore, maintenance such as zero-span adjustment is required.
Vortex meters are known to be superior devices for steam flow measurement due to their inherent linear measurement, large turndown, low-pressure drop, and high accuracy. When sizing a vortex meter, it is common to have to reduce the line size using concentric reducers to increase the velocity through the meter for optimum performance. Unfortunately, piping changes need to be made and this can increase the installation costs.
So which is the best solution?
Yokogawa’s digitalYEWFLO vortex shedding flow meter offers a number of inherent advantages over the orifice plate technology and is becoming the application standard. To provide a cost-effective and scalable solution, Yokogawa suggested the digitalYEWFLO Reduced Bore Type Vortex Flow Meter. This meter features both a cast stainless steel body as well as a concentric reducer and expander that enables stable flow rate measurements in low-flow conditions. This ensures a stable and accurate flow rate output and extends the range of measurements that can make to a lower flow span.
The total cost of ownership is greatly reduced from an orifice solution since there is no need to maintain the pressure transmitter, impulse lines, manifolds, and isolation valves.
This flow meter is available with a single reduction or a double reduction in bore size, while still keeping the same face-to-face dimension of a standard full-bore vortex, simplifying installations on new projects. There is no need for additional reducers or piping, replacing existing full-bore vortex units is simple. Reduced bore digitalYEWFLO vortex meters are flow tested with the reducers; ensuring unit accuracy is uncompromised by reductions in the line. Manual reductions in piping cannot guarantee this same level of accuracy.
Yokogawa vortex flowmeters are also well-suited to high-temperature applications, and the quality of flow management can be improved even further via using anti-vibrating efficiency and self-diagnostic functions that rely on the digitalYEWFLO's integrated Spectral Signal Processing system, providing optimum and stable measurement.
When choosing the multivariable option, a built-in integral temperature sensor allows the meter to take a true mass flow measurement of saturated steam by referring to steam tables embedded in the software. This eliminates the need for separate pressure and temperature sensors and a flow computer.
- Minimum measurable flow up to five times lower than conventional vortex flow meter
- Integrated construction with reducers built into the flow meter body
- The same face-to-face dimensions ease the task of installing other sizes or types of digitalYEWFLO flow meters
- Does not require costly piping modifications such as reducers/expanders or short pipes to achieve the required straight pipe length
The onshore upstream industry faces ever higher demands and greater challenges with increasingly difficult and hostile environments in which it must operate.
Pulp & Paper
The paper and pulp industry is highly competitive and must meet ever-changing market needs. Yokogawa helps realize energy-efficient plants which are globally sustainable.
- Topsides processing and handling on the production platform prep extracted hydrocarbons for transport
- Yokogawa integrated control/monitoring maximize topsides operations productivity and availability
Wellhead & Separation
The wellhead provides the structural and pressure-containing interface for the drilling and production equipment. The surface pressure control is provided by a christmas tree, which is installed on top of the wellhead. Isolation valves and choke equipment physically control the flow of well fluids when the well goes into production. Various automation packages are added to locally or remotely monitor, control and optimize production from each well or multi-well pad. Oilfield separators employ a pressure vessel to separate well fluids produced from oil and gas wells into gaseous and liquid components which are then transferred to pipelines or localized storage depending on the areas infrastructure.
Related Products & Solutions
- The classic vortex flow meter
- Accurate, stable measurements
- Wide variety of applications
High Temperature / Cryogenic
The solution for high process temperature and cryogenic applications.
- digitalYEWFLOW multivariable type vortex flow meter
- Shedder bar with embedded temperature sensor
- Monitors temperature, calculates mass flow rate
Vortex Flow Meters
Yokogawa's vortex flow meters are long-lasting and robust, offering field-proven sensor technology and high reliability to deliver improvements in plant efficiency and reduce OPEX.
Contact a Yokogawa Expert to learn how we can help you solve your challenges.