Innovative thermoeconomic diagnosis of multiple faults in air conditioning units / Antonio Piacentino in International journal of refrigeration, Vol. 36 N° 8 (Décembre 2013)  

Public ISBD [article]  inInternational journal of refrigeration > Vol. 36 N° 8 (Décembre 2013) . - pp. 2343–2365 Titre : Innovative thermoeconomic diagnosis of multiple faults in air conditioning units : methodological improvements and increased reliability of results Titre original : Diagnostic thermoéconomique innovant de défaillances multiples dans des conditionneurs d'air: améliorations méthodologiques et fiabilité accrue des résultats Type de document : texte imprimé Auteurs : Antonio Piacentino, Auteur ; Miriam Talamo, Auteur Année de publication : 2014 Article en page(s) : pp. 2343–2365 Note générale : Refrigeration Langues : Anglais (eng) Mots-clés : Thermoeconomic diagnosis  air-conditioning units  failure  detection Résumé : Thermoeconomic faults diagnosis of air conditioning units is a pioneeristic approach to detect single or multiple faults and quantify their impact in terms of additional energy consumption. The poor reliability of conventional thermoeconomic approaches has been limiting the interest for practical applications of this technique. In this paper an improved thermoeconomic diagnosis is proposed and applied to a reference 120 kWc air-cooled air conditioning system; a simulator is used to evaluate thermodynamic data under normal and faulty conditions. Four faults are individually or simultaneously imposed: fouling at condenser and evaporator, refrigerant undercharge and compressor valve leakage. For setting up the diagnostic tool only a few numerical or experimental tests are required; the results testify the procedure to be sufficiently reliable both when heavy or light faults are considered. Also, the performance of the diagnostic procedure slightly improves when the effects of “system level” faults like refrigerant undercharge are preliminarily filtered. En ligne : http://www.sciencedirect.com/science/article/pii/S0140700713001813 [article] Innovative thermoeconomic diagnosis of multiple faults in air conditioning units = Diagnostic thermoéconomique innovant de défaillances multiples dans des conditionneurs d'air: améliorations méthodologiques et fiabilité accrue des résultats : methodological improvements and increased reliability of results [texte imprimé] / Antonio Piacentino, Auteur ; Miriam Talamo, Auteur . - 2014 . - pp. 2343–2365. Refrigeration Langues : Anglais (eng) in International journal of refrigeration > Vol. 36 N° 8 (Décembre 2013) . - pp. 2343–2365 Mots-clés : Thermoeconomic diagnosis  air-conditioning units  failure  detection Résumé : Thermoeconomic faults diagnosis of air conditioning units is a pioneeristic approach to detect single or multiple faults and quantify their impact in terms of additional energy consumption. The poor reliability of conventional thermoeconomic approaches has been limiting the interest for practical applications of this technique. In this paper an improved thermoeconomic diagnosis is proposed and applied to a reference 120 kWc air-cooled air conditioning system; a simulator is used to evaluate thermodynamic data under normal and faulty conditions. Four faults are individually or simultaneously imposed: fouling at condenser and evaporator, refrigerant undercharge and compressor valve leakage. For setting up the diagnostic tool only a few numerical or experimental tests are required; the results testify the procedure to be sufficiently reliable both when heavy or light faults are considered. Also, the performance of the diagnostic procedure slightly improves when the effects of “system level” faults like refrigerant undercharge are preliminarily filtered. En ligne : http://www.sciencedirect.com/science/article/pii/S0140700713001813

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