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Muhamad Maulana Azimatun Nur
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Prodi Teknik Kimia UPN Veteran Yogyakarta"</span>. Jl. SWK. 104 Lingkar Utara Condong Catur- Yogyakarta (55283)
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Eksergi: Chemical Engineering Journal
Published by Universitas Pembangunan Nasional Veteran Yogyakarta
ISSN : 1410394X     EISSN : 24608203     DOI : https://doi.org/10.31315
Core Subject : Science, Engineering,
Chemical Engineering, Chemistry & Bioengineering Control & Systems Engineering Industrial & Manufacturing Engineering Materials Science & Nanotechnology
Eksergi is an open-access, peer-reviewed scientific journal that focuses on research and innovation in the fields of energy and renewable energy. The journal aims to provide a platform for scientists, researchers, engineers, and practitioners to share knowledge and advancements that contribute to sustainable development and energy transition. In addition to energy topics, the journal also accepts high-quality manuscripts related to, but not limited to, the following areas: Separation processes Bioprocesses related to food, energy, and environmental applications Wastewater treatment and resource recovery Process optimization and intensification Carbon capture, utilization, and storage (CCUS) Chemical reaction engineering and reactor design Life cycle assessment (LCA) and sustainability evaluation Process Design and Control Engineering Process Simulations Process System Engineering The journal welcomes original research articles, reviews, and short communications that demonstrate novelty, scientific rigor, and relevance to chemical engineering and interdisciplinary applications.
Arjuna Subject : Energi (semua kategori) - Energi Terbarukan, Keberlanjutan dan Lingkungan
Articles 312 Documents
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Characterization of Polylactic Acid/Chitosan/Cellulose Nanofibers for Wound Dressing Applications Belinda Laulista; Desy Miftachul; Lilik Suprianti; Tri Widjaja; Aisyah Alifatul Zahidah Rohmah; Citra Yulia Sari
Eksergi Vol 23 No 2 (2026)
Publisher : Prodi Teknik Kimia UPN "Veteran" Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31315/eksergi.v23i2.16532

Abstract

Effective wound care requires dressing materials that provide physical protection while actively encouraging tissue regeneration. This research investigates the development and characterization of biocomposite nanofiber membranes composed of polylactic acid (PLA), chitosan, and cellulose, synthesized via the electrospinning method at an optimized operating voltage of 20 kV. The study aimed to identify the optimal material ratio that balances mechanical durability with surface wettability. Comprehensive evaluations included Scanning Electron Microscopy (SEM), Fourier Transform Infrared (FTIR), water contact angle (WCA) measurements, and mechanical testing. The results demonstrate that the integration of chitosan and cellulose significantly refined fiber morphology and wettability. The optimal variant with a composition of 90:5:5 wt.% (PLA:chitosan:cellulose) achieved a WCA of 98.64°, indicating that the hydrophobicity was maintained relative to pure PLA. M orphologically, the composite fibers were uniform and bead-less, with a mean diameter reduction of 36.2% (from 517.12 nm in pure PLA to 329.68 nm). FTIR spectra confirmed successful component incorporation through characteristic amide and hydroxyl bands. Mechanically, the composite membrane exhibited a superior synergy between strength and flexibility, achieving a yield strength of 0.06 MPa and a significant elongation at break of 80.36%. These findings suggest that the 90:5:5 formulation successfully bridges the gap between mechanical durability and the high surface area-to-volume ratio required for advanced, biodegradable wound care applications.
Thermodynamic Efficiency Analysis of ORC-VCR Ship Cooling Systems with Low-GWP Fluids Based on Ship Engine Waste Heat Colin Steven Aruan; Fajri Ashfi Rayhan
Eksergi Vol 23 No 2 (2026)
Publisher : Prodi Teknik Kimia UPN "Veteran" Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31315/eksergi.v23i2.16589

Abstract

The growing demand for efficient onboard air-conditioning systems has encouraged the exploration of alternative energy recovery approaches in maritime operations. In this context, the present work evaluates a hybrid ORC-VCR system that harnesses waste heat from engine exhaust gases and cooling water circuits to support shipboard climate control. A comprehensive thermodynamic framework is established to assess and compare the operational performance of three working fluids: R601, R1233zd, and R1234ze. To enhance overall system effectiveness, an optimization analysis is carried out to evaluate various working fluids and define the operating parameters that enable the highest achievable efficiency. The analysis considers key parameters, including heat source temperature, condensing temperature, as well as hot water mass flow rate levels. Analysis outcomes demonstrate that variations in working fluid selection lead to significant differences in overall efficiency and operational performance parameters. Among the fluids evaluated, R1234ze demonstrates the highest overall performance under the examined operating conditions. In addition, system performance metrics, including output capacity and coefficient of performance, are substantially governed by variations in heat source temperature and condensing conditions. Adjustment of the hot water flow rate effectively controls the evaporator temperature, contributing to system optimization. In summary, performance assessment results indicate that R1234ze offers the greatest efficiency, making it the optimal choice for implementation in the proposed shipboard waste heat recovery system.

Page 32 of 32 | Total Record : 312

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