Kyma Steam Analyzer

The fuel economy of a steam turbine plant is strongly dependent of the operation and the condition of the plant. Incorrect operation and inefficient components lead to large fuel losses. Performance monitoring systems are excellent tools to analyze the condition and ensure optimum operation. Systems installed on more than 180 steam ships, have documented a fuel saving of 3% to 6%.

Kyma Steam Analyzer (KSA) is an analysis tool for optimum steam turbine plant operation. It consists of an advanced software package for the calculation of heat balance and component efficiencies, engineering support for instrumentation upgrading, and commissioning of the system. The commissioning involves calibration of instruments, engine performance trials and pinpointing of non optimum operation or deficient components.

The software run on a personal computer under Windows. The KSA is run on a personal computer under the Windows-platform and is normally intergrated with the Kyma Ship Performance system. This integration means that input data required for the KSA system can be automatically collected from the Vessel Intergrated System.

Each individual steam analyser is tailor-made for the specific plant. The units in the input and the output forms are normally the same as on the local instrumentation.

The system can be used for all normal at sea conditions with stable operation of the steam plant. As this is mainly a diagnostic tool, it is sufficient to do an engine trial once a week or when the vessel schedule permits.

The inputs signals are normally fuel (gas) consumption, distillate production, power output, propeller revolution, and physical properties of steam and water for all major components. Data for combustion air and flue gas are also measured.

Based on the input data to the computer, a performance report is printed. The printout shows the condition of the plant and the components compared to design or trial data. The calculations will specify component losses and what they represent in excess fuel consumption. Any non optimum operation will be specified in the printout. A plant operation check list indicates operating status of normally adjustable parameters. An error check list is printed for a component or parameter out of range.

For the major components graphical presentation is used to express component efficiency relative to a design or trial curve. The deviation from reference is seen both graphically and numerically, including deviation in fuel consumption.

The output information from the system will specify where to find the faults. The program also calculates torque distribution between HP-turbine and LP-turbine with warning for gear overload.

The calculated heat balance and flow diagram shows the physical conditions of steam and water and the mass flows in the plant. Together with the component efficiency calculation and a plant operation check list, this gives the operating engineers the information required to run the plant at an optimum condition.

References

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