نوع مقاله : مقاله کامل پژوهشی
نویسندگان
1 دانشجوی کارشناسی ارشد، بخش مهندسی مواد، دانشکده مهندسی، دانشگاه شیراز، شیراز، فارس، ایران
2 دانشیار، بخش مهندسی مواد، دانشکده مهندسی، دانشگاه شیراز، شیراز، فارس، ایران
چکیده
از دیرباز، مبدل های انرژی الکترومغناطیس، به‌عنوان تأمین‌کننده انرژی الکتریکی، مورد استفاده قرار می گرفتند. طراحی و کاربرد این مبدل‌ها، به دلیل به‌کارگیری مغناطیس های جامد، جهت القای مغناطیسی در شکل ها و بسامدهای محیطی مختلف، محدود شده است. اخیراً، سیال های مغناطیسی به‌عنوان جایگزین مغناطیس جامد، برای کاربرد این مبدل‌ها در محدوده بسامدی پایین و طراحی های متفاوت، مورد توجه قرار گرفته اند. در این پژوهش، هدف بر آن بوده است که مبدلی ساده، با استفاده از فروسیال مگنتایت، ساخته شود. برای این منظور، نانوذرات مگنتایت، به روش هم رسوبی شیمیایی، سنتز و سپس، اصلاح سطحی آن‌ها، با اولئیک اسید (روغن آفتابگردان)، انجام شد. برای بررسی ویژگی های ذرات سنتزشده، از روش های شناسایی XRD، FTIR، VSM و SEM استفاده شد. متوسط اندازه ذرات، حدود 70 نانومتر و مغناطش اشباع آن‌ها، emu/gr63/41 بود. سه نوع سیال آب، نفت سفید و روغن ترمز، به‌منظور ساخت فروسیال پایدار مگنتایت، استفاده شد. پایدارترین فروسیال، فروسیال بر پایه روغن ترمز بود. تبدیل نوسانات مکانیکی به ولتاژ القایی، توسط مبدل طراحیشده، انجام شد و نتایج نشان داد ولتاژ القاء شده در مبدل، با افزایش بسامد نوسانات و میدان مغناطیسی اعمالی، افزایش می‌یابد.
کلیدواژه‌ها
موضوعات
عنوان مقاله [English]
Fabrication of a Converter for Converting of Vibrational Energy to Electrical Energy Using Fe3O4 Ferrofluid
نویسندگان [English]
- Marzeh Asna Ashary 1
- Babak Hashemi 2
1 M. Sc. Student, Materials Science and Engineering Department, School of Engineering, Shiraz University, Shiraz, Fars, Iran
2 Associate Professor, Materials Science and Engineering Department, School of Engineering, Shiraz University, Shiraz, Fars, Iran
چکیده [English]
Electromagnetic energy converters have been used as electrical energy suppliers. The use of solid magnets in these devices, for producing of magnetic induction, has produced difficulties for the design and application of these systems in various forms and frequencies. Magnetic fluids as a substitute for solid magnets have recently been considered for the use of these devices in low frequency ranges and different designs. In this study, a simple vibrational energy converter was designed using magnetite ferrofluid. For this purpose, the nanoparticles of magnetite were synthesized by co-precipitation method and surface modified by oleic acid. The XRD, FTIR, VSM testes and SEM studies were done to investigate properties of the samples. The nano magnetite particles had the average size of 70 nm and the saturation magnetization of 41.63 emu/gr. Three types of fluid including water, kerosene and brake oil were used to make magnetite stable ferrofluid. The most stable ferrofluid was brake oil based ferrofluid. The fabricated energy converter converted mechanical vibrations to induction voltage and voltage increased with frequency of vibration and applied magnetic field.
کلیدواژه‌ها [English]
- Magnetite
- Co-Precipitation
- Oleic Acid
- Ferrofluid
- Energy Harvester
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