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RESEARCH PAPERS

A New Thermoeconomic Method for the Location of Causes of Malfunctions in Energy Systems

[+] Author and Article Information
Andrea Toffolo

Department of Mechanical Engineerings, University of Padova, via Venezia, 1-35151 Padova, Italyandrea.lazzaretto@unipd.it

Andrea Lazzaretto1

Department of Mechanical Engineerings, University of Padova, via Venezia, 1-35151 Padova, Italyandrea.lazzaretto@unipd.it

1

Corresponding author.

J. Energy Resour. Technol 129(1), 1-9 (May 09, 2006) (9 pages) doi:10.1115/1.2424960 History: Received April 01, 2005; Revised May 09, 2006

Diagnosis procedures primarily aim at locating the control volumes where anomalies occurred. This is not a simple task since the effects of anomalies generally propagate through the whole system and affect the behavior of several components. Some components may therefore present a reduced efficiency, although they are not sources of operation anomalies, due to nonflat efficiency curves. These induced effects are a big obstacle in the use of thermoeconomic techniques for the search of the origin of the anomalies. On the other hand, the real cause of the alteration of component behavior is the modification of its characteristic curve, due to degradation or failures. According to this concept, a new approach, based on an indicator measuring the alteration of the characteristic curve of the component affected by the operation anomaly, is proposed and applied to a test case power plant.

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Copyright © 2007 by American Society of Mechanical Engineers
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Figures

Grahic Jump Location
Figure 1

Operating points in real and reference states for components with and without anomalies

Grahic Jump Location
Figure 2

The virtual restoration of reference state for components with and without anomalies, using Eq. 5

Grahic Jump Location
Figure 3

The TADEUS combined cycle power plant

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