Intrinsic and induced malfunctions quantification in thermoeconomic diagnosis through quantitative causality analysis

Abstract:

One of the most interesting applications of thermoeconomic analysis is the diagnosis of energy systems: the detection of malfunctioning components and the quantification of the additional fuel consumption caused by each one of them. The main difficulty of this task is the presence of induced malfunctions, which appear because unit exergy consumptions are not true independent variables. Besides, the quantitative causality analysis is a diagnosis methodology based directly on the thermodynamic representation of the thermal system. So that it allows to relate the reduction of the system efficiency to the free diagnosis variables that cause it. The approach proposed in this paper is based on the combination of both methodologies in order to use the quantitative causality analysis for decomposing the variation of unit exergy consumptions into intrinsic and induced and then to use the fuel impact formula to determine the additional fuel consumption.

Año de publicación:

2007

Keywords:

• Thermoeconomic diagnosis
• Malfunctions
• Quantitative causality analysis

Fuente:

scopus