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Domestic waste (eggshells and banana peels particles) as sustainable and renewable resources for improving resin-based brakepad performance: Bibliometric literature review, techno-economic analysis, dual-sized reinforcing experiments, to comparison ... Asep Bayu Dani Nandiyanto; Risti Ragadhita; Meli Fiandini; Dwi Fitria Al Husaeni; Dwi Novia Al Husaeni; Farid Fadhillah
Communications in Science and Technology Vol 7 No 1 (2022)
Publisher : Komunitas Ilmuwan dan Profesional Muslim Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21924/cst.7.1.2022.757


The objective of this study is to develop a new environmentally-friendly brake pad made from eggshells (Es) and banana peels (BPs) as reinforcement agents. E and BP particles as dual reinforcement with various compositions were combined. The E/BP mixture was then embedded on a polymer matrix composing a resin/hardener mixture in a 1:1 ratio. As a standard, brake pads using a single reinforcement of E and BP particles were also fabricated. Physical properties (i.e. particle size, surface roughness, morphology, and density), as well as mechanical properties (i.e. hardness, wear rate, and friction coefficient properties) were investigated. It was observed that using dual reinforcements was preferable (compared to using single reinforcements) because they had a synergistic effect on the mechanical properties of the brake pad. The best mechanical properties were found in dual reinforcements of brake pad specimens using E/BP particles with a higher BP ratio in which the value of the stiffness test, puncture test, wear rate, and coefficient of friction were 4.5 MPa, 86.80, 0.093×10-4 g/s.mm2, and 1.67×10-4, respectively. A high BP particle ratio played a dominant role in dual reinforcements, increasing the resin's bonding ability and resulting in good adhesion between the reinforcement and matrix. When compared to commercial brake pads, the brake pad specimens fabricated in this study met the standards. The techno-economic analysis also confirmed the prospective production of brake pads from E and BP particles (compared to commercial brake pads). From this research, it is expected that environmentally friendly and low-cost brake pads can be used to replace the dangerous friction materials.
Shell and Tube Heat Exchanger Design Using Silica Nanofluid from Lemongrass Leaves Baariq Fauzaan Andang Paryawan; Asep Bayu Dani Nandiyanto
Scientica: Jurnal Ilmiah Sains dan Teknologi Vol. 1 No. 3 (2023): Scientica: Jurnal Ilmiah Sains dan Teknologi
Publisher : Komunitas Menulis dan Meneliti (Kolibi)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.572349/scientica.v1i3.544


One of the frequently used pieces of equipment in most industrial applications is heat exchanger. The design of a heat exchanger is very effective to reduce total production costs, compared to buying a ready-made exchanger. The purpose of this research is to design a shell and tube type heat exchanger (two passes) using silica nanofluid that produce from bimass lemongrass for nanosilica raw material. TEMA standard is used to obtain the dimensional specifications of the device. Then, these parameters are calculated manually using the Microsoft Excel application to evaluate the performance of the designed heat exchanger. The results of the study indicate that the designed heat exchanger has met the standard. The heat exchanger has 115 tubes with effectiveness around 75%. Although some parameters still do not meet the standards, so further research is needed to meet the permitted standards. A high value of tool effectiveness indicates that the heat exchanger has good performance. In future, we hope this planning and design can be used as a reference in the design of a heat exchanger to be more economical, effective, and has high reliability in the production activity