Alternative Approaches for Real-time Monitoring of the Effectiveness of Hydrogenerator Heat Exchangers
Rattachement africain : br, co. Niveau de preuve : code pays fourni par la source.
Le résumé fourni par la source
Heat exchangers require periodic maintenance. Offline cleaning scheduled shutdowns are usually needed to restore the exchanger effectiveness, drastically reduced when fouling accumulation occurs. An online real-time alternative for monitoring the effectiveness of exchanger (during a period of eleven months of continuous operation) and an adapted version of the ε-NTU method to calculate its effectiveness are discussed. The experimental difficulties of measuring the mass flow rate and the hot air temperature at the exit of the exchanger is examined. Detailed analysis confirmed that the outlet temperature of the hot fluid could introduce errors of up to 30% in the calculation of the exchanger effectiveness. A skillful treatment of the energy balance is proposed to address the issue. The associated uncertainties are estimated by two independent approaches, the so-called classic method, i.e., the Guide to the Expression of Uncertainty in Measurement and the Monte Carlo method. Both confirmed that measurements of the air outlet temperature accounts for more than 50% of the uncertainty associated with the calculation of the exchanger effectiveness. It is suggested that the conventional method (based on measurements of the outlet air temperature) is not suitable for traditional everyday practices to monitor the effectiveness of the heat exchangers of hydrogenerators.
Ce résumé expose les affirmations des auteurs. BNTIC ne l’interprète pas comme une validation indépendante des résultats.
Le contrôle bibliographique ouvert
DOI retrouvé dans Crossref DOI retrouvé ; titre concordant.
- Titre Crossref
- Alternative Approaches for Real-time Monitoring of the Effectiveness of Hydrogenerator Heat Exchangers
- Date Crossref
- 04/10/2023
- Éditeur
- Informa UK Limited
- Type
- journal-article
Ce recoupement confirme des métadonnées liées au DOI. Il ne confirme ni la méthode ni les conclusions de l’étude, et il ne compte pas comme une seconde source scientifique indépendante.
Où se fait cette recherche
-
Pontifícia Universidade Católica do Rio de Janeiro pays non établi dans la noticeUniversité ou école supérieure
-
Universidad Antonio Nariño pays non établi dans la noticeUniversité ou école supérieure
-
Federal Center for Technological Education Celso Suckow da Fonseca pays non établi dans la noticeUniversité ou école supérieure
-
Pontifical Catholic University of Rio de Janeiro Postgraduate Metrology Programme pays non établi dans la noticeUniversité ou école supérieure
-
FIMEB-Mechanical Engineering Program pays non établi dans la noticeInstitution
-
Department of Mechanical Engineering pays non établi dans la noticeInstitution
Pontifícia Universidade Católica do Rio de Janeiro, Universidad Antonio Nariño et Federal Center for Technological Education Celso Suckow da Fonseca, avec 3 autres affiliations.
Une affiliation ne permet pas de déduire la nationalité d’un auteur.