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Ecodesign for Composite Materials and Products
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Ecodesign for Composite Materials and Products

A special issue of Materials (ISSN 1996-1944). This special issue belongs to the section "Advanced Composites".

Deadline for manuscript submissions: closed (10 September 2022) | Viewed by 6175

Special Issue Editor

Prof. Dr. Dan Dobrotă

E-Mail Website
Guest Editor
Faculty of Engineering, Lucian Blaga University of Sibiu, 550024 Sibiu, Romania
Interests: welding; design; construction; materials science; materials testing; manufacturing engineering
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

The ecodesign of product manufacturing and recycling processes supports economies’ competitiveness and stimulates innovation, while reducing energy consumption and CO2 emissions. In the context of the design of composite materials and their related products, their impact on the environment must be taken into account and new practical solutions must be found, with healthier working conditions and less CO2 emissions. As a result, the design of these materials and products requires the use of a modern design system that supports environmental protection. Consequently, it is necessary to research new technologies used to acquire these materials and their related products.

The proposed Special Issue aims to publish articles addressing the design of composite materials and easily recyclable products. Potential topics include, but are not limited to: composite materials; composite biomaterials; ecodesign for product manufacturing; ecodesign for composite waste recycling; analysis of the sustainability of composite materials manufacturing processes; reduction of energy consumption in the manufacturing processes of composite materials and the products derived from them.

Prof. Dr. Dan Dobrotă
Guest Editor

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Materials is an international peer-reviewed open access semimonthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2600 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • ecodesign
  • manufacturing
  • composite materials
  • products

Published Papers (4 papers)

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Research

18 pages, 9334 KiB  
Article
Analysis of Microchannel Heat Sink of Silicon Material with Right Triangular Groove on Sidewall of Passage
by Surojit Saha, Tabish Alam, Md Irfanul Haque Siddiqui, Mukesh Kumar, Masood Ashraf Ali, Naveen Kumar Gupta and Dan Dobrotă
Materials 2022, 15(19), 7020; https://0-doi-org.brum.beds.ac.uk/10.3390/ma15197020 - 10 Oct 2022
Cited by 8 | Viewed by 1524
Abstract
Microchannel heat sink (MCHS) is a promising solution for removing the excess heat from an electronic component such as a microprocessor, electronic chip, etc. In order to increase the heat removal rate, the design of MCHS plays a vital role, and can avoid [...] Read more.
Microchannel heat sink (MCHS) is a promising solution for removing the excess heat from an electronic component such as a microprocessor, electronic chip, etc. In order to increase the heat removal rate, the design of MCHS plays a vital role, and can avoid damaging heat-sensitive components. Therefore, the passage of the MCHS has been designed with a periodic right triangular groove in the flow passage. The motivation for this form of groove shape is taken from heat transfer enhancement techniques used in solar air heaters. In this paper, a numerical study of this new design of microchannel passage is presented. The microchannel design has five variable groove angles, ranging from 15° to 75°. Computational fluid dynamics (CFD) is used to simulate this unique microchannel. Based on the Navier–Stokes and energy equations, a 3D model of the microchannel heat sink was built, discretized, and laminar numerical solutions for heat transfer, pressure drop, and thermohydraulic performance were derived. It was found that Nusselt number and thermo-hydraulic performance are superior in the microchannel with a 15° groove angle. In addition, thermohydraulic performance parameters (THPP) were evaluated and discussed. THPP values were found to be more than unity for a designed microchannel that had all angles except 75°, which confirm that the proposed design of the microchannel is a viable solution for thermal management. Full article
(This article belongs to the Special Issue Ecodesign for Composite Materials and Products)
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19 pages, 9985 KiB  
Article
Performance of Microchannel Heat Sink Made of Silicon Material with the Two-Sided Wedge
by Aditya Vatsa, Tabish Alam, Md Irfanul Haque Siddiqui, Masood Ashraf Ali and Dan Dobrotă
Materials 2022, 15(14), 4740; https://0-doi-org.brum.beds.ac.uk/10.3390/ma15144740 - 06 Jul 2022
Cited by 6 | Viewed by 1296
Abstract
New designs of the microchannel with a two-sided wedge shape at the base were studied numerically. Five different wedge angles ranging from 3° to 15° were incorporated into the microchannel design. Simulation of this novel microchannel was carried out using Computational Fluid Dynamics [...] Read more.
New designs of the microchannel with a two-sided wedge shape at the base were studied numerically. Five different wedge angles ranging from 3° to 15° were incorporated into the microchannel design. Simulation of this novel microchannel was carried out using Computational Fluid Dynamics (CFD). Three-dimensional models of the microchannel heat sink were created, discretized, and based on Navier–Stokes and energy equations; laminar numerical solutions were obtained for heat transfer and pressure drop. Flow characteristics of water as coolant in a microchannel were studied. It was observed that numerical results are in good agreement with experimental results. It was found that the Nusselt number and friction factor are significantly varied with the increase in Reynolds number. The Nusselt number varies in the following ranges of 5.963–8.521, 5.986–8.550, 6.009–8.568, 6.040–8.609, and 6.078–8.644 at 3°, 6°, 9°, 12°, and 15°, respectively. The microchannel with a wedge angle of 15° was found to be better in terms of Nusselt number and thermo-hydraulic performance. The enhancement in the Nusselt number is found as 1.017–1.036 for a wedge angle of 15°; however, friction factors do not show the perceptible values at distinct values of wedge angle. Moreover, the thermo-hydraulic performance parameters (THPP) were evaluated and found to be maximum in the range of 1.027–1.045 for a wedge angle of 15°. However, minimum THPP was found in the range of 1.005–1.0185 for a wedge angle of 3°. Full article
(This article belongs to the Special Issue Ecodesign for Composite Materials and Products)
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21 pages, 2359 KiB  
Article
The Effect of Roughness in Absorbing Materials on Solar Air Heater Performance
by Karmveer, Naveen Kumar Gupta, Md Irfanul Haque Siddiqui, Dan Dobrotă, Tabish Alam, Masood Ashraf Ali and Jamel Orfi
Materials 2022, 15(9), 3088; https://0-doi-org.brum.beds.ac.uk/10.3390/ma15093088 - 24 Apr 2022
Cited by 8 | Viewed by 1643
Abstract
Artificial roughness on the absorber of the solar air heater (SAH) is considered to be the best passive technology for performance improvement. The roughened SAHs perform better in comparison to conventional SAHs under the same operational conditions, with some penalty of higher pumping [...] Read more.
Artificial roughness on the absorber of the solar air heater (SAH) is considered to be the best passive technology for performance improvement. The roughened SAHs perform better in comparison to conventional SAHs under the same operational conditions, with some penalty of higher pumping power requirements. Thermo-hydraulic performance, based on effective efficiency, is much more appropriate to design roughened SAH, as it considers both the requirement of pumping power and useful heat gain. The shape, size, and arrangement of artificial roughness are the most important factors for the performance optimization of SAHs. The parameters of artificial roughness and operating parameters, such as the Reynolds number (Re), temperature rise parameter (ΔT/I) and insolation (I) show a combined effect on the performance of SAH. In this case study, various performance parameters of SAH have been evaluated to show the effect of distinct artificial roughness, investigated previously. Therefore, thermal efficiency, thermal efficiency improvement factor (TEIF) and the effective efficiency of various roughened absorbers of SAH have been predicted. As a result, thermal and effective efficiencies strongly depend on the roughness parameter, Re and ΔT/I. Staggered, broken arc hybrid-rib roughness shows a higher value of TEIF, thermal and effective efficiencies consistently among all other distinct roughness geometries for the ascending values of ΔT/I. This roughness shows the maximum value of effective efficiency equals 74.63% at a ΔT/I = 0.01 K·m2/W. The unique combination of parameters p/e = 10, e/Dh = 0.043 and α = 60° are observed for best performance at a ΔT/I higher than 0.00789 K·m2/W. Full article
(This article belongs to the Special Issue Ecodesign for Composite Materials and Products)
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20 pages, 3959 KiB  
Article
Ecodesign of the Aluminum Bronze Cutting Process
by Dan Dobrotă, Mihaela Oleksik and Anca Lucia Chicea
Materials 2022, 15(8), 2735; https://0-doi-org.brum.beds.ac.uk/10.3390/ma15082735 - 08 Apr 2022
Cited by 1 | Viewed by 1319
Abstract
The realization of products from materials with high properties generally involves very high energy consumption. Thus, in the research, it was considered to optimize the machining process by cutting of an aluminum bronze alloy, so as to obtain a reduction in energy consumption [...] Read more.
The realization of products from materials with high properties generally involves very high energy consumption. Thus, in the research, it was considered to optimize the machining process by cutting of an aluminum bronze alloy, so as to obtain a reduction in energy consumption in correlation with the roughness of the machined surfaces. The research focused on the processing of a semi-finished product with a diameter of Ø = 20 mm made of aluminum bronze (C62300). In addition, in the research, the aim was to establish some correlations between the amount of power consumed and the quality of the surfaces processed by cutting. In this sense, the forces were measured in the 3 directions specific to the cutting process (Fc; Ff; Fp) for 3 tools construction variants and power consumed. The results showed that, if a certain constructive variant of the cutting tool is used in the processing, a reduction of the power consumed to cutting can be obtained by approximately 30% and a reduction of the roughness of the processed surface by approximately 90–100%. Furthermore, following the statistical processing of the results, it was shown that it would be advisable to use, especially in roughing processes, the cutting tool variant that offers the greatest reduction in roughness and cutting power. Full article
(This article belongs to the Special Issue Ecodesign for Composite Materials and Products)
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