Application of the malfunction thermoeconomic diagnosis to a dynamic heating and DHW facility for fault detection

Application of Thermoeconomics in the diagnosis of building energy supply systems allows the localization and quantification of an abnormal operation, which can cause significant increase in energy consumption to obtain the same product. To do that, a comparison between the real operation of the ene...

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Bibliographic Details
Published in:Energy and buildings 2017-01, Vol.135, p.385-397
Main Authors: Picallo-Perez, Ana, Sala-Lizarraga, José Mª, Iribar-Solabarrieta, Eider, Odriozola-Maritorena, Moises, Portillo-Valdés, Luis
Format: Article
Language:English
Subjects:
Boilers
Building thermal plants
Diagnosis
Energy consumption
Energy efficiency
Exergy
Exergy cost
Failure analysis
Fault detection
Heating
Inverse problems
Localization
Malfunction and dysfunction analysis
Malfunctions
Methodology
Power supply
Thermoeconomic diagnosis
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Summary:Application of Thermoeconomics in the diagnosis of building energy supply systems allows the localization and quantification of an abnormal operation, which can cause significant increase in energy consumption to obtain the same product. To do that, a comparison between the real operation of the energy system and the reference operation must be done. In this paper a DHW and heating plant based on a condensing boiler has been analysed. Diagnosis is applied through a mono-failure case using a methodology based on the fuel impact formula and the malfunction and dysfunction analysis. An innovative methodology will be presented in order to filter the induced effects that take place in a dynamic situation due to the control system. Although the real aim of diagnosis is to solve the inverse problem, in this work we have faced a direct problem, in which a parameter of one component of the plant has been modified and its effect over the other components and the whole plant is evaluated. The major outcome is that by the application of this methodology the effects produced by the faulty component can easily be quantified, both in performance and economic terms. Those effects are due to the component malfunction as well as the induced malfunctions and dysfunctions generated in the other components of the facility.
ISSN:0378-7788
1872-6178
DOI:10.1016/j.enbuild.2016.11.043