RT info:eu-repo/semantics/article T1 A Fault Detection System for a Geothermal Heat Exchanger Sensor Based on Intelligent Techniques A1 Alaiz Moretón, Héctor A1 Castejón Limas, Manuel A1 Casteleiro Roca, José Luis A1 Jove, Esteban A1 Fernández Robles, Laura A1 Calvo Rolle, José Luis A2 Ingenieria de Sistemas y Automatica K1 Ingeniería de sistemas K1 Fault detection K1 Geothermal heat exchanger K1 Random decision forests K1 Gradient boostings K1 Extremely randomized trees K1 Adaptive boosting K1 K-nearest neighbors K1 Shallow neural networks K1 3313 Tecnología E Ingeniería Mecánicas AB [EN] This paper proposes a methodology for dealing with an issue of crucial practical importance in real engineering systems such as fault detection and recovery of a sensor. The main goal is to define a strategy to identify a malfunctioning sensor and to establish the correct measurement value in those cases. As study case, we use the data collected from a geothermal heat exchanger installed as part of the heat pump installation in a bioclimatic house. The sensor behaviour is modeled by using six different machine learning techniques: Random decision forests, gradient boosting, extremely randomized trees, adaptive boosting, k-nearest neighbors, and shallow neural networks. The achieved results suggest that this methodology is a very satisfactory solution for this kind of systems. PB MDPI LK https://hdl.handle.net/10612/21141 UL https://hdl.handle.net/10612/21141 NO Aláiz-Moretón, H., Castejón-Limas, M., Casteleiro-Roca, J.-L., Jove, E., Fernández Robles, L., & Calvo-Rolle, J. L. (2019). A fault detection system for a geothermal heat exchanger sensor based on intelligent techniques. Sensors (Switzerland), 19(12). https://doi.org/10.3390/S19122740 DS BULERIA. Repositorio Institucional de la Universidad de León RD 26-jun-2024