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Sulzer has solved the primary fuel nozzle leak problem on GE 6B DLN and 7EA DLN primary fuel nozzles, reducing to zero previously tolerable minor leaks at the primary fuel nozzle tips. A new seal design enables the turbine to run at optimum parameters for power, efficiency and component lifespan, while assisting to meet stricter emission regulations.
The seal, designed for direct replacement of the original C-seals in 6B DLN
and 7EA DLN primary fuel nozzles, is a practical alternative to adjusting the fuel and air mix. The revised fuel nozzle refurbishment process ensures that the seal contact surfaces are prepared with precision to ensure the best possible fit with the improved seals. Technicians use custom-designed fixturing in the process of seal landing refurbishment, which ensures quality repair and improves the efficiency of the process.
Flow tests and dynamic leak checks are performed on a repeatable flow test
bench. After refurbishment, final flow testing and dynamic pressure testing are performed to validate the seal integrity above normal operating pressure and confirm the zero-leak status of the assemblies.
Typically, the refurbishment process can be completed in less than two weeks, faster and less expensive than assemblies using the full tip-to-fuel nozzle
body welding process. www.sulzer.com
The Siemens Sitrans TO500 is a fiber optic temperature measurement system.
It is said to enable complex temperature measurements and the detection of the exact position of critical over temperatures in tube and tube-bundle reactors, for example. It has up to 48 measuring points per measuring lance with each sensor lance having a small diameter. This allows use of a smaller protective tube in the reactor, improving productivity and accuracy.
Wet steam power
Heliex Power has devised an efficient way of harnessing the power of “wet”
steam — the vapor you see when a kettle boils. Produced at low temperatures
and low pressure, wet steam has been lost as waste heat because its moisture
content erodes turbine blades.
More than 40,000 GWh of energy is said to be lost globally every year
through waste steam, and it is estimated that up to 50% of industrial energy is
eventually released as waste heat.
Developed in conjunction with researchers at City University, London,
Heliex’s technology uses screw compressors, working in reverse, to recapture lost energy and generate electricity in an economically viable way. The technology traditionally used to harness the power from steam only works effectively with superheated steam.
Vibration monitoring enclosure
Hansford Sensors has launched a safe connection enclosure for industrial and process vibration monitoring. The HS-ICE enclosure provides a compact, self-contained terminal to take readings from accelerometers via portable data-collectors. The multi-channel unit can be configured from 1-to-24 channels. It is made of stainless steel and sealed to IP66 to protect from dust and moisture. It is both IECEx and ATEX certified. The company has also unveiled a high performance triaxial vibration sensor, capable of providing simultaneous measurement in three axes. Called the HS-173R, the accelerometer is for use with the latest generation of route-based and stand-alone data collectors, which increasingly require multichannel inputs from a range of permanently or temporarily mounted sensors.
Portable oil analyzer
Spectro Scientific has introduced Version 5 of its FluidScan portable infrared oil analyzer. It lowers limits of detection on total water measurement for turbine oils from 1,000 ppm to 300 ppm, boosting analysis sensitivity and accuracy. It also provides direct, immediate measurement of water, total acid number (TAN), oxidation, glycol, total base number (TBN) and other parameters via Spectro’s Direct Infrared Spectroscopy (DIR) technology. DIR operates without wet chemistry and requires no solvents; only one drop of oil is needed for analysis. The FluidScan oil library contains more than 700 oils, facilitating analysis and matching of more than 97% of the oils provided
over the last 12 months.
The latest release of Siemens STARCCM+ software includes new features to
help product development organizations accelerate their ability to digitally simulate and understand how a product will perform in the real world using a digital twin, which is a precise virtual model of a product’s physical and performance characteristics. New analysis tools combined with enhanced visual realism enable STARCCM+ version 12.02 to help engineers unlock deeper meaning behind complex engineering simulations. It includes the
ability to simulate reactions in Solid Oxide Fuel Cells (SOFC) and Adaptive
Gridding. For combustion tables, this reduces computational effort without loss of accuracy. It is applicable to all flamelet combustion models; this can reduce table size and corresponding memory use by up to 30 times. Version 12.02 also introduces Ray Tracing, a capability that allows engineers to apply photo-realistic renderings to their design and simulation results. STAR-CCM+ is now part of the Siemens Simcenter portfolio, a suite of simulation software and test solutions.
Mobile air filtration
Mobile power generation has logistical issues. It must be easily transportable and must offer easy assembly or disassembly. As with any other gas turbine installation, it must be protected from performance degradation and physical damage due to contaminants in the air intake. The amount of noise generated needs to be reduced to acceptable levels as part of the air inlet design.
Clarcor Industrial Air’s clearcurrent Mobile Air Inlet System is manufactured
from aluminum to optimize aerodynamic performance. Its dual aspect filtration sections can be taken off and stored. Its weatherhoods fold back to protect the filters when in transit. The Mobile Air Inlet System is additionally fitted with acoustic attenuation. It is the only configuration approved by GE for use in its TM2500/TM2500+ Generation VIII mobile aero-derivative gas
turbine generator set.
Clark-Reliance has announced a new line of coalescing filter elements for the gas processing industry. VertexCore filter elements eliminate unsafe changeout techniques while increasing efficiency. They have a fixed extension that is welded to the end cap, which allows maintenance staff to easily remove and replace elements without having to climb or reach into filtration pressure vessels. www.clark-reliance.com
Metrix Instrument Company announces the launch of the new Hardy Shaker series HI- 903 and HI-913. They ensure that the seismic sensors and transmitters that have been installed are working properly and giving accurate results. Just like pressure and flow instruments need calibration checks every year, so do seismic sensors and transmitters. They come in four models, and feature an easy frequency and amplitude adjustment system, an extended battery life of up to 18 hours, and a lightweight waterproof ruggedized case. www.metrixvibration.com
Posidyne clutch brakes have oil shear technology that allows rapid and precise stopping, starting, speed change and positioning. They are now available in space-savings piggyback designs. Special pads cast into the main housings mount an adjustable motor base, allowing the motor to sit atop the clutch brake. Other components include a gear belt drive from the motor to the input shaft and an enclosed belt drive guard. This design is ideal for applications where an inline arrangement is not feasible due to space considerations. They are well suited for applications with frequent start/stop cycles, and high cycle rates (up to 300 cycles per minute). Oil shear technology means the brakes last up to ten times longer than standard dry friction brakes and do not need maintenance, adjustment or disc replacement. It establishes a boundary layer of transmission fluid in shear between the friction discs and drive plates. As the parts come together, the fluid in shear will transmit torque between the two parts, as well as absorb heat. This eliminates direct contact of the friction discs and drive plates during high-speed slip. Heat from the friction surface is dissipated as the fluid circulates to the housing. www.forcecontrol.com
Kobe Steel has supplied about 30 percent of the Japanese market for stationary hydrogen refueling stations with the HyAC series. Launched in 2014, the HyAC series consists of two models: a single-unit, high-pressure hydrogen compressor, named HyAC, and a compact package consisting of the hydrogen compressor and other major equipment called the HyAC mini. Now Kobe Steel has developed the HyAC mini-A for sale in the U.S. The HyAC mini-A comes with a dispenser made by Tatsuno Corp. that enables Kobe Steel to provide equipment from hydrogen compression to fueling fuel cell vehicles. To meet U.S. needs, the footprint was reduced by 10% and the filling pressure was raised to 87.5 MPa. It is also equipped with a remote monitoring system. www.kobelco.com