دانشگاه کاشانمهندسی و مدیریت انرژی2345-295115320260220A low-cost and early-return strategy for energy consumption reduction in industrial facility: the inclusion of energy criterion in equipment maintenance planیک استراتژی کمهزینه و زودبازده برای کاهش مصرف انرژی در تسهیلات صنعتی: گنجاندن معیار انرژی در برنامه نگهداری و تعمیرات تجهیزات11530510.22052/eem.2026.257394.1144FAمحمودرضااسفندیگروه مدیریت کسب و کار، دانشکده علوم مالی، مدیریت و کارآفرینی، دانشگاه کاشان، کاشان، ایرانمحمدتقیرضوانگروه مهندسی صنایع، دانشکده مهندسی، دانشگاه کاشان، کاشان، ایران.فاطمهکریمشاهی'گروه مهندسی صنایع، دانشکده مهندسی، دانشگاه کاشان، کاشان، ایرانJournal Article20250926Energy is an essential parameter in determining the cost of final products in energy-intensive industries. Proper attention to energy efficiency can significantly enhance competitiveness and profitability in such facilities. Hence, reducing energy consumption is critical for addressing environmental concerns and promoting sustainable development.<br /><br />In contrast to capital-intensive and long-term strategies, short-term and low-cost approaches are more viable for reducing energy consumption. One such strategy is the integration of energy considerations into facility maintenance management. This paper proposes a preventive maintenance optimization (PMO)-based framework to ensure the inclusion of energy criteria in the revision of equipment maintenance plans.<br /><br />The present study aims to lay the groundwork for changing the attitudes of operational and managerial personnel by assessing their awareness of the impact of proper maintenance on energy consumption and evaluating the use of energy criteria in the development and review of equipment maintenance planning. In designing the proposed framework, conventional methods for reviewing equipment maintenance plans are prioritized to avoid major procedural changes. This approach helps reduce the likelihood of resistance to change by relying on commonly used maintenance review practices.<br /><br />The proposed framework is applied to a technology-based industry in Iran. The maintenance plan of an energy-intensive piece of equipment in the studied industry, namely a 315-kW centrifugal fan, is revised to validate the effectiveness and practicality of the proposed framework. Under constant operating and process conditions, the implementation of the revised maintenance plan over a five-month monitoring period resulted in an average reduction of 2.3% in electrical energy consumption, achieved without any hardware modification or capital investment.انرژی یک پارامتر اساسی در تعیین هزینه محصولات نهایی در صنایع پرمصرف انرژی است. توجه مناسب به بهرهوری انرژی میتواند به طور قابل توجهی رقابتپذیری و سودآوری در این تأسیسات را افزایش دهد. بنابراین، کاهش مصرف انرژی برای رسیدگی به نگرانیهای زیستمحیطی و ترویج توسعه پایدار بسیار حیاتی است. در مقابل استراتژیهای سرمایهبر و بلندمدت، رویکردهای کوتاهمدت و کمهزینه برای کاهش مصرف انرژی قابلاجراتر هستند. یکی از این استراتژیها، گنجاندن ملاحظات انرژی در مدیریت نگهداری تأسیسات است. این مقاله یک چارچوب مبتنی بر بهینهسازی نگهداری پیشگیرانه (PMO) را پیشنهاد میکند تا اطمینان حاصل شود که معیار انرژی در بازنگری برنامههای نگهداری تجهیزات گنجانده شده است. هدف مطالعه حاضر، ایجاد زمینهای برای تغییر نگرشهای پرسنل عملیاتی و مدیریتی از طریق ارزیابی آگاهی آنها از تأثیر نگهداری مناسب بر مصرف انرژی و ارزیابی استفاده از معیارهای انرژی در توسعه و بازنگری برنامهریزی نگهداری تجهیزات است. سپس، در طراحی چارچوب، روشهای متداول برای بازنگری برنامههای نگهداری تجهیزات اولویتبندی میشوند تا از تغییرات عمده رویهای جلوگیری شود. این رویکرد به کاهش احتمال مقاومت در برابر تغییر با تکیه بر شیوههای معمول بازنگری نگهداری کمک میکند. چارچوب پیشنهادی در یک صنعت مبتنی بر فناوری در ایران به کار گرفته شده است. برنامه نگهداری تجهیزات پرمصرف انرژی در صنعت مورد مطالعه، یعنی یک فن سانتریفیوژ ۳۱۵ کیلوواتی، بازنگری شده تا اثربخشی و کارایی چارچوب پیشنهادی را تأیید و تضمین کند. نتایج بهدستآمده از اجرای برنامه بازنگری شده به مدت تقریباً چهار ماه نشان میدهد که مصرف برق به طور متوسط ۲.۳٪ کاهش یافته است.دانشگاه کاشانمهندسی و مدیریت انرژی2345-295115320260220Design and Analysis of New Flux-Intensifying PM-Assisted SynRM with Line Start Capability and Torque Performance EnhancementDesign and Analysis of New Flux-Intensifying PM-Assisted SynRM with Line Start Capability and Torque Performance Enhancement11530610.22052/eem.2026.257910.1151FASeyed RezaMousavi-AghdamUniversity of Mohaghegh ArdabiliMiladPourhasanUniversity of Mohaghegh ArdabiliJournal Article20251111This paper presents a new type of synchronous reluctance motor topology that integrates permanent magnets in a non-conventional arrangement to boost magnetic flux. The combination of SynRM and PMs provides an efficient solution for a wide range of applications, including fans and pumps. The design of the PM and the external and internal flux barriers is an essential challenge for this type of motor. The proposed Line start-flux intensifying-PMaSynRM (LS-FI-PMaSynRM), which embeds PMs in the rotor, operates on the d-axis rather than the q-axis, as in conventional PMaSynRM. The proposed design also has a starting capability. An embedded conductor bar in the rotor reduces torque pulsations and improves dynamic response during start conditions. Analyzing the proposed design for the increment of the torque output with PM while keeping the lowest possible torque ripple. The finite-element analysis (FEA) is considered to validate the proposed motor and analyses, and the results demonstrate their advantages.This paper presents a new type of synchronous reluctance motor topology that integrates permanent magnets in a non-conventional arrangement to boost magnetic flux. The combination of SynRM and PMs provides an efficient solution for a wide range of applications, including fans and pumps. The design of the PM and the external and internal flux barriers is an essential challenge for this type of motor. The proposed Line start-flux intensifying-PMaSynRM (LS-FI-PMaSynRM), which embeds PMs in the rotor, operates on the d-axis rather than the q-axis, as in conventional PMaSynRM. The proposed design also has a starting capability. An embedded conductor bar in the rotor reduces torque pulsations and improves dynamic response during start conditions. Analyzing the proposed design for the increment of the torque output with PM while keeping the lowest possible torque ripple. The finite-element analysis (FEA) is considered to validate the proposed motor and analyses, and the results demonstrate their advantages.دانشگاه کاشانمهندسی و مدیریت انرژی2345-295115320260220Ultra-Broadband Light Trapping in Thin-Film Silicon Solar Cells Using Optimized Slanted Tooth-Shaped Gratingsبه دام انداختن نور در سلولهای خورشیدی سیلیکونی فیلم نازک با استفاده از شبکههای شیاردار دندانهدار بهینهشده11535510.22052/eem.2026.258112.1154FAعارفپیربداقیدانشجوی دکتری رشته نانو الکترونیک دانشگاه کاشانمحمودنیکوفردنانوالکترونیک/پژوهشکده نانو/دانشگاه کاشان/کاشانJournal Article20251219This superior performance originates from the advanced broadband light-trapping mechanism provided by the meticulously engineered slanted grating geometry with a 300 nm period, which substantially amplifies photon absorption while preserving outstanding electrical properties. These results establish a clear and practical route toward realizing cost-effective, ultrahigh-efficiency thin-film silicon solar cells for next-generation scalable photovoltaic applications.The global imperative to transition towards sustainable energy systems, driven by the critical need to combat climate change and meet escalating energy demands, has positioned solar photovoltaics (PV) as a cornerstone technology for the future energy landscape [1-3]. Solar energy possesses exceptional potential with theoretical capabilities exceeding 10²³ watts, while associated costs have experienced a remarkable 90% reduction over the past decade [4,5]. Within the photovoltaic domain, silicon solar cells maintain overwhelming market dominance with over 95% share, leveraging fundamental advantages including abundant raw material availability as the second most abundant element in Earth's crust, long-term stability exceeding 25 years, and mature processing technologies [6,7]. Recent advances have pushed silicon heterojunction solar cells to certified efficiencies of 26.81% with fill factors up to 86.59% on industry-grade silicon wafers [8], demonstrating continuous progress in conversion efficiency.This paper reports the design and optimization of an ultrahigh-efficiency thin-film silicon solar cell featuring broadband light trapping through a precisely engineered slanted grating architecture. The device, with a periodicity of 300 nm, consists of a 100 nm aluminum (Al) back reflector, a 110 nm p-type silicon active layer incorporating slanted grating structures, and a 45 nm n-type silicon capping layer. Comprehensive optical and electrical characterizations were conducted using Lumerical FDTD and CHARGE solvers, respectively. Beginning with a planar baseline configuration, remarkable performance improvement was realized by introducing slanted grating teeth and meticulously optimizing critical geometric parameters—namely the inter-tooth gap spacing, tooth height, and slant angle. The optimized configuration achieves an inter-tooth gap of 260 nm, tooth height of 90 nm, and slant angle of 40°, yielding an impressive average optical absorption of 84% across the solar spectrum. The electrical characteristics are equally remarkable, demonstrating a short-circuit current density of 44.41 mA/cm², open-circuit voltage of 0.580 V, power conversion efficiency of 20.58%, and fill factor of 0.798