Gas turbine upgrade kit knocks the socks of NOx

GE Oil & Gas has announced that its DLN-1 IBH emissions technology, which enables Frame 5-2 gas turbines running at partial load to meet new NOx emission standards, has been self-certified as a GE Ecomagination service offering.

The DLN-1 IBH upgrade kit for the Frame 5-2 recently completed a rigorous environmental and operational evaluation to meet the requirements of Ecomagination, which is GE’s commitment to more efficient sources of energy and reduced emissions.

“Developing technologies to help customers meet their environmental challenges is a central focus of our business,” said Jeff Nagel, VP Global Services for GE Oil & Gas.

“We foresee that within the next 3-5 years, emission regulations similar to those already in place in the U.S. and the E.U. will be applied in the Middle East and North Africa, where much of our Frame 5-2 fleet is installed. A GE DLN-1 IBH upgrade for Frame 5-2 gas turbines will allow operators to meet NOx emission standards of 42 ppm without purchasing a new turbine”.

The GE Oil & Gas DLN-1 IBH technology enables a Frame 5-2 gas turbine to operate at 50 per cent rather than 80 per cent partial load, saving apprOximately 27m pounds of natural gas.

Installed on a Frame 5-2 gas turbine running at 50 per cent load, the new technology also lowers emissions from 80 to 42 ppm, which translates to 570 tonnes per year on a turbine running full time. cally are used for mechanical drive applications in the oil and gas industry. These heavy-duty machines are designed for direct coupling with centrifugal compressors over a wide operating range, including variable loads and extreme environmental conditions.

GE’s Dry Low NOx combustion system combines hardware solutions for fuel and air stream regulation with closed-loop monitoring and controls to fine tune emissions throughout the combustion process.

Next-gen lube set to ease the pain of servo-valves

Shell lubricants companies have reformulated their Shell Turbo Oils CC range of turbine oils offering improved deposit resistance for increased turbine reliability and availability.

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Shell Turbo Oils CC meet the severe demands imposed by modern heavy-duty turbine applications including combined-cycle, gas and steam turbines.

The Shell Turbo Oils CC range will help tackle the long-standing problem of lacquer or varnish formation in servo-valves, which causes the valves to stick or seize. Formation of varnish on thrust or journal bearings can cause increased wear rates, while other problems caused by varnish in turbine oil systems include reduction of cooler performance, increased bulk oil temperatures, prematurely plugged filters and strainers, and plugging of small oil orifices.

William Stein, Project Leader – Turbine Oils at Westhollow Technology Centre for Shell Lubricants, said: “Our Shell Turbo Oils CC range was introduced in 1997-98 specifically for the combined-cycle systems and has performed well. However, we felt that we could further improve our original formulation to help reduce lube oil varnishing in turbines and hence improve reliability in today’s demanding conditions.”

The next generation Shell Turbo Oil CC series combines the traditional strengths of the previous formulation, is fully compatible with the current formulation, and shows improvement in its long-term deposit resistance performance. Also, the new formulation has excellent RPVOT (Rotating Pressure Vessel Oxidation Test) retention and outstanding thermal and Oxidative performance.