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Records Added in October 2021
Records added in October 2021
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Showing records 51 to 52 of 52. [First] Page: 1 2 3 Last
Modeling and Flowsheet Simulation of Vibrated Fluidized Bed Dryers
Soeren E. Lehmann, Moritz Buchholz, Alfred Jongsma, Fredrik Innings, Stefan Heinrich
October 11, 2021 (v1)
Keywords: drying kinetics, Dyssol, flowsheet simulation, fluidized bed drying, Modelling, vibrated fluidized bed
Drying in fluidized beds is an important step in the production of powdered materials. Especially in the food and pharmaceutical industry, fluidized bed dryers are often vibrated to improve the drying process. In the current work, a continuous fluidized bed drying model is implemented in the novel, open-source flowsheet simulation framework Dyssol. The new model accounts for the hydrodynamic characteristics of all Geldart groups as well as the impact of mechanical vibration on the drying process. Distributed particle properties are considered by the model. Comprehensive validation of the model was conducted for a wide range of process parameters, different materials, dryer geometries and dimensions as well as the impact of vibration. Particle properties are predicted accurately and represent the broad experimental data well. A sensitivity analysis of the model confirmed grid independence and the validity of underlying model assumptions.
Integrating FMEA and the Kano Model to Improve the Service Quality of Logistics Centers
Ling-Lang Tang, Shun-Hsing Chen, Chia-Chen Lin
October 11, 2021 (v1)
Keywords: failure mode and effect analysis (FMEA), Kano model, logistics center, service failure, service quality
This study uses the logistics center of a large organic retail store in Taiwan to analyze service blueprint and workflow, identifying the potential points of failure and thus serving as a basis for quality improvement. The failure mode and effect analysis (FMEA) model is an effective problem prevention methodology that can easily interface with many engineering and reliability methods. The utilized method integrates the failure mode and effect analysis (FMEA) and the Kano model to explore the possible occurrence of failures in the internal workflow and services of the studied logistics center. A two-stage survey was conducted. In the first stage, an investigation was conducted by 20 logistics experts on the FMEA’s key service failures. In the second stage, a questionnaire was filled out by 220 store staff to summarize the logistics service quality factors found in the Kano model. The results show that the degree of attention and satisfaction in the priority improvement items when there... [more]
Showing records 51 to 52 of 52. [First] Page: 1 2 3 Last
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