Listar por autor "Pérez, Eduar"

Purpose – This study aims to evaluate the impact breaking energy of the parts manufactured by the fused filament fabrication (FFF) method. The evaluation considers the use of the epoxy resin coating, different materials ...

This paper presents a transient heat and mass transfer model with experimental validation of a finned cylindrical adsorbent bed for performance analysis in chemisorption refrigeration system. The approximate solution for ...

Experimental study of resin coating to improve the impact strength of fused filament fabrication process pieces
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López Taborda, Luis Lisandro | 2021-02-27

Purpose – This study aims to evaluate the impact breaking energy of the parts manufactured by the fused filament fabrication (FFF) method. The evaluation considers the use of the epoxy resin coating, different materials and different printing orientations. Design/methodology/approach – The authors developed an experimental statistical design using 54 experimental trials. The experiments’ output variable is the impact break energy of the parts manufactured by the FFF method. The input variables for the experiments consist of an epoxy resin coating (XTC-3DVR , generic resin and without resin coating), different filament materials (nylon 1 carbon fiber, polyethylene terephthalate and polycarbonate) and different printing orientations (flat, edge and vertical) used. The authors carried out the tests following the EN ISO 179-1. Findings – The use of resin coating has a significant influence on the impact energy of parts manufactured using the FFF method. The resin coating increases the impact resistance of parts processed by FFF by almost 100% of the value as compared to the parts without a resin coating. Postprocessing is useful on ductile materials and increases impact breaking energy at weak print orientations. Originality/value – This research opens a new opportunity to improve the mechanical properties of parts manufactured using the FFF method. The use of a resin coating reinforces the parts in weak print orientation.

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Modeling and experiments on a finned cylindrical reactor with expanded graphite/activated carbon/lithium chloride-ammonia for chemisorption refrigeration systems
...
Pérez, Eduar | 2021-02-05

This paper presents a transient heat and mass transfer model with experimental validation of a finned cylindrical adsorbent bed for performance analysis in chemisorption refrigeration system. The approximate solution for the mathematical model, including transient heat and mass transfer equations in cylindrical coordinates, was obtained by implementing the Crank-Nicholson approach in a finite difference scheme. Geometrical configuration and physical parameters, including bed material thermal properties and TGA-based kinetic modeling for reaction rate estimation, were used as model data inputs to predict thermal bed distribution, heat flows, and coefficient of performance for a refrigeration system. Results from the model were validated with transient data from a chemical sorption refrigeration test bench. Refrigeration system reactor was made of expanded graphite/activated carbon/lithium chloride (AC/EG/LiCl)-adsorbent (NH3 in solution with a 25% concentration). The model demonstrated excellent agreement and an adequate representation of the physical phenomena, constituting a potential tool for efficiency-enhancing development of adsorption reactors for refrigeration systems.

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Listar por autor "Pérez, Eduar"

Experimental study of resin coating to improve the impact strength of fused filament fabrication process pieces

Modeling and experiments on a finned cylindrical reactor with expanded graphite/activated carbon/lithium chloride-ammonia for chemisorption refrigeration systems

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Experimental study of resin coating to improve the impact strength of fused filament fabrication process pieces

Modeling and experiments on a finned cylindrical reactor with expanded graphite/activated carbon/lithium chloride-ammonia for chemisorption refrigeration systems

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Listar por autor "Pérez, Eduar"

Experimental study of resin coating to improve the impact strength of fused filament fabrication process pieces ﻿

Modeling and experiments on a finned cylindrical reactor with expanded graphite/activated carbon/lithium chloride-ammonia for chemisorption refrigeration systems ﻿

Envíos recientes

Experimental study of resin coating to improve the impact strength of fused filament fabrication process pieces

Modeling and experiments on a finned cylindrical reactor with expanded graphite/activated carbon/lithium chloride-ammonia for chemisorption refrigeration systems

Portales Institucionales

Experimental study of resin coating to improve the impact strength of fused filament fabrication process pieces

Modeling and experiments on a finned cylindrical reactor with expanded graphite/activated carbon/lithium chloride-ammonia for chemisorption refrigeration systems