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Design optimization of a grid-tied microgrid for a residential community in southern Bangladesh

Clean Energy 2023年第6期7卷 1300-1315页

作者： Sayeed Hasan MdRifat Hazari effat jahan Mohammad Abdul Mannan Department of Electrical and Electronic Engineering American International University-Bangladesh(AIUB)408/1KuratoliKhilkhetDhaka 1229Bangladesh Center for Sustainable Energy Research(CSER) Dr.Anwarul Abedin Institute of InnovationAmerican International University-Bangladesh(AIUB)408/1KuratoliKhilkhetDhaka 1229Bangladesh

Growing energy demand,diminishing fossil fuel reserves and geopolitical tensions are serious concerns for any country’s energy strategy and security.These factors have a greater impact on developing countries,as many of them rely largely on traditional energy resources.Cleaner energy generation is the viable alternative for mitigating these problems,as well as achieving energy independ-ence and tackling climate change.The article discusses planning and design optimization of a residential community microgrid based on multiple renewable resources.In particular,the design and techno-economic assessment of a grid-tied hybrid microgrid for meeting the electricity demand of an alluvial region,Urir Char,located in southern Bangladesh,was addressed.Hybrid Optimization of Multiple Energy Resources is used for the evaluation and it is supplemented by a fuzzy-logic-based load profile design strategy.In addition to the analysis,a predictive load-shifting-based demand management is also introduced.Several cases were considered for the studies and,after considering several criteria,a grid-tied system comprising a photovoltaic array,wind turbine and energy storage system was found to be the best fit for powering the loads.The suggested system reduces the life-cycle cost by 18.3%,the levelized cost of energy by 61.9%and emissions by 77.2%when compared with the grid-only option.Along with the microgrid design,cooking emissions and energy categorization were also discussed.

关键词： demand-side management fuzzy logic load profile generator net-zero energy residential microgrid techno-economic analysis

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Comparative Analysis between Conventional PI, Fuzzy Logic and Artificial Neural Network Based Speed Controllers of Induction Motor with Considering Core Loss and Stray Load Loss

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Journal of Mechanics Engineering and Automation 2017年第1期7卷 50-57页

作者： Md. Rifat Hazari effat jahan Mohammad Abdul Mannan Junji Tamura Department of Electrical and Electronic Engineering Kitami Institute of Technology 165 Koen-cho Kitami Hokkaido 090-8507 Japan Department of Electrical and Electronic Engineering American International University-Bangladesh Kemal Ataturk Avenue Banani Dhaka 1213 Bangladesh

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Investigation of Ovarian Follicular Waves and Major Hormonal Profile in Red Chittagong Cattle

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Advances in Bioscience and Biotechnology 2020年第2期11卷 7-21页

作者： Saiful Islam Md. Ahsanul Kabir Md. Faizul Hossain Miraz effat jahan Tamanna Satya Ranjan Sarker Zinia Islam S. M. jahangir Hossain Sharif Hossain Gautam Kumar Deb Department of Biotechnology and Genetic Engineering Jahangirnagar University Dhaka Bangladesh Biotechnology Division Bangladesh Livestock Research Institute Savar Dhaka Bangladesh

Red Chittagong Cattle (RCC) is one of the renowned varieties of cattle which is indigenous and most potential type of domestic animal genetic resource in Bangladesh with distinct phenotypic characteristics. Reproductive management might be a process for multiplying this cattle variety. Therefore, the goals of this study were to characterize the follicular waves of RCC and to determine the Progesterone (P4), Follicle Stimulating Hormone (FSH) and Luteinizing Hormone (LH) profile during three consecutive estrus cycle. Follicular wave emergence (Day 0) was identified using trans-vaginal ultrasound technique and follicular growth was then monitored from Day 0 to Day 23 during three consecutive estrus cycle and blood samples were collected. After measuring the growth and diameter of the follicles, hormonal assays of collected blood samples were performed using Enzyme Linked Immunosorbent Assay (ELISA). We found that, both RCC cows and heifers showed two waves inter-ovulatory intervals. The length of inter-ovulatory intervals and the diameter of the ovulatory follicle of RCC cows and heifers were slightly different from each other. The identification of the dominant follicle was confirmed from the start of its deviation from other subordinate follicles till it reached to the maximum diameter and identified as dominant follicle which increases linearly for approximately six days (growing phase). This dominant follicle is remained approximately same size for five days (static phase), and then begins to regress (regressing phase) decreasing the antral diameter. The follicular waves are first detectable as 4 - 5 mm follicles approximately at day 0 and day 10 both for RCC cows and heifers which showed two waves inter-ovulatory intervals. The circulating varied concentrations of LH, FSH and P4 were determined using ELISA in case of both cows and heifers and the concentration curves followed the similar pattern of change during the estrus cycle. Hence, the knowledge about ovarian follicular waves will create a base line for r

关键词： Red Chittagong Cattle Ovarian Follicles Progesterone Follicle Stimulating Hormone Luteinizing Hormone ELISA

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