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A turbomachine

A technology for turbines and impellers, which is used in the field of estimation of process quantities and can solve problems such as complex equipment and unmeasurable

Active Publication Date: 2013-03-13
SULZER MANAGEMENT AG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Some process quantities can be measured with practically sufficient accuracy using relatively expensive effective measuring equipment
However, measuring some other process quantities may require complex and rather expensive equipment, and / or some process quantities may not even be measurable
For example, measuring mass flow rate or volume flow rate with sufficient accuracy can be challenging

Method used

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Examples

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Embodiment Construction

[0034] FIG. 1 shows a schematic diagram of a turbine 100 according to an exemplary embodiment of the invention. The turbine comprises a chamber 101 with an inlet 102 and an outlet 103 for moving fluid. In FIG. 1 , cavity 101 is shown in cross-section. The turbine includes an impeller 104 disposed in the cavity to move fluid. The impeller is driven by means of an electric motor 112 equipped with a static frequency converter 110 connected to a power network 111 . The electric motor can be, for example, an induction motor, a permanent magnet synchronous motor, a brushless DC motor or a reluctance motor. It is also possible that the impeller is driven by a combustion engine. In the exemplary turbine shown in FIG. 1 , the impeller is directly connected to the shaft 113 of the electric motor. However, it is also possible to have a gear between the impeller and the motor for driving it. The electric motor can be a high speed induction motor with a solid rotor. In this document,...

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Abstract

A method for obtaining an estimate for a process quantity of a turbomachine comprises measuring (301) first process quantities and calculating (302) an estimate for a second process quantity, for example mass flow, on the basis of the measured first process quantities and a reference table of interrelations between process quantities prevailing in reference inlet conditions corresponding to a pre- defined inlet fluid temperature, a pre-defined inlet fluid pressure, and pre-defined fluid properties at the inlet. The reference table and the measured first process quantities represent such a set of data values that the estimate is obtainable on the basis of different sub-sets of the data values. Hence, the estimation task is over-posed in the sense that there is more data than necessary for obtaining the estimate. In the calculation of the estimate, more weight is given to such a part of the data which has a smaller error contribution.

Description

technical field [0001] The invention relates to a method for obtaining an estimated value of a turbine-related process variable. The process variable can be, for example but not necessarily, the mass flow rate produced by the turbine. Furthermore, the invention relates to a turbomachine, a turbomachine system comprising two or more turbomachines, and a computer program for obtaining an estimate of a process quantity associated with a turbomachine. Background technique [0002] In many applications, it is necessary to estimate or measure one or more process quantities characterizing the operation of a turbomachine, which can be, for example, a turboblower, a turbocompressor or a pump. For example, estimates of these process quantities may be needed to control a turbo blower, turbo compressor or pump so that unstable or oscillating flow conditions known as surge and stall can be avoided with sufficient safety margin, and / or to be able to Keep efficiency within acceptable lim...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F04D13/06F04D15/00F04D25/06F04D27/02G05D7/06
CPCF04D27/0261G05D7/0676F04D15/0066F04D27/0269F04D13/06F04D15/0072F04D27/001F04D25/06F04D27/004F05D2270/301G01M15/14Y02B30/70F04D15/00F04D27/02G05D7/06
Inventor A.罗伊纳南E.兰托V.托米拉
Owner SULZER MANAGEMENT AG
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