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Articles 1 - 30 of 217

Full-Text Articles in Engineering

Optimization Of Solar-Coal Hybridization For Low Solar Augmentation, Aaron T. Bame Apr 2021

Optimization Of Solar-Coal Hybridization For Low Solar Augmentation, Aaron T. Bame

Theses and Dissertations

One approach to enabling a larger penetration of renewable sources of energy is the implementation of hybrid power plants. This work presents a process to determine the preliminary optimal configuration of a concentrating solar power-coal hybrid power plant with low solar augmentation, and is demonstrated on a coal power plant in Castle Dale, UT. A representative model is developed and validated against published data for a coal power plant of a different configuration than Hunter Unit 3. The simplifications within the representative model include combining multiple feedwater heaters, combining turbines that operate across the same boundary states, and the mass-average ...


Economics Of Grid-Tied Solar Photovoltaic Systems Coupled To Heat Pumps: The Case Of Northern Climates Of The U.S. And Canada, Joshua M. Pearce, Nelson Sommerfeldt Feb 2021

Economics Of Grid-Tied Solar Photovoltaic Systems Coupled To Heat Pumps: The Case Of Northern Climates Of The U.S. And Canada, Joshua M. Pearce, Nelson Sommerfeldt

Michigan Tech Publications

Solar photovoltaic (PV) technology is now a profitable method to decarbonize the grid, but if catastrophic climate change is to be avoided, emissions from transportation and heating must also decarbonize. One approach to renewable heating is leveraging improvements in PV with heat pumps (HPs). To determine the potential for PV+HP systems in northern areas of North America, this study performs numerical simulations and economic analysis using the same loads and climate, but with local electricity and natural gas rates for Sault Ste. Marie, in both Canada and U.S. Ground-mounted, fixed-tilt, grid-tied PV systems are sized to match 100 ...


A Low-Cost Secure Iot Mechanism For Monitoring And Controlling Polygeneration Microgrids, Josué Martínez-Martínez, Diego Aponte-Roa, Idalides Vergara-Laurens, Wayne Weaver Dec 2020

A Low-Cost Secure Iot Mechanism For Monitoring And Controlling Polygeneration Microgrids, Josué Martínez-Martínez, Diego Aponte-Roa, Idalides Vergara-Laurens, Wayne Weaver

Michigan Tech Publications

The use of Internet-connected devices at homes has increased to monitor energy consumption. Furthermore, renewable energy sources have also increased, reducing electricity bills. However, the high cost of the equipment limits the use of these technologies. This paper presents a low-cost secured-distributed Internet of Things (IoT) system to monitor and control devices connected in a polygeneration microgrid, as a combined power system for local loads with renewable sources. The proposed mechanism includes a Wireless Sensor Actuator Networked Control System that links network nodes using the IEEE 802.15.4 standard. The Internet communication enables the monitor and control of devices ...


Modeling The Process Of Heat Exchange Between Heaters And The Material Taking Into Account Heat Exchange With The Environment, J.E. Safarov, Sh.A. Sultanova, G.T. Dadayev, B.T. Jumayev, A.B. Saydullayev Nov 2020

Modeling The Process Of Heat Exchange Between Heaters And The Material Taking Into Account Heat Exchange With The Environment, J.E. Safarov, Sh.A. Sultanova, G.T. Dadayev, B.T. Jumayev, A.B. Saydullayev

Chemical Technology, Control and Management

The paper considers the modeling of the process of heat transfer between heaters and material, taking into account heat exchange with the environment. To solve this problem, an experimental drying unit was assembled. Paraffin, sand, salt and brick were selected as test materials. The research carried out with the use of paraffin shows the most optimal and economical result in relation to other materials. The efficiency of paraffin application reaches 51 ºС, and the cooling time takes much longer. In addition, the selected material and the selected temperature have a beneficial effect on the drying process of plant material. The ...


Insight Into Tribological Problems Of Green Ship And Corresponding Research Progresses, Yuwei Sun, Xinping Yan, Chengqing Yuan, Xiuqin Bai Oct 2020

Insight Into Tribological Problems Of Green Ship And Corresponding Research Progresses, Yuwei Sun, Xinping Yan, Chengqing Yuan, Xiuqin Bai

Friction

The so-called “green ship” is being regarded as a potential solution to the problems that the shipping industry faces, such as energy conservation and environmental protection. Some new features, such as integrated renewable energy application, biomimetic materials, and antifriction and wear resistant coating have been accepted as the typical characteristics of a green ship, but the tribology problems involved in these domains have not been precisely redefined yet. Further, the related research work is generally focused on the technology or material itself, but not on the integration of the applicable object or green ship, marine environment, and tribological systematical analysis ...


Renewable Energy Based Agricultural Robot, R. Krishna, J.Enoch Richbert, J. Jeyakaran, R. Kirubhakaran, S. Dhinakar Sep 2020

Renewable Energy Based Agricultural Robot, R. Krishna, J.Enoch Richbert, J. Jeyakaran, R. Kirubhakaran, S. Dhinakar

International Journal of Mechanical and Industrial Engineering

This paper deals with how to mechanize agricultural process through electronic and embedded components. The aim of the paper is to elaborately explain the processes done by the so called robot.


Decentralized Renewable Hybrid Mini-Grids For Rural Communities: Culmination Of The Irep Framework And Scale Up To Urban Communities, Blessing Ugwoke, Adedoyin Adeleke, Stefano P. Corgnati, Joshua M. Pearce, Pierluigi Leone Sep 2020

Decentralized Renewable Hybrid Mini-Grids For Rural Communities: Culmination Of The Irep Framework And Scale Up To Urban Communities, Blessing Ugwoke, Adedoyin Adeleke, Stefano P. Corgnati, Joshua M. Pearce, Pierluigi Leone

Michigan Tech Publications

The Integrated Rural Energy Planning (IREP) framework offers a unified road map for locating, planning and operating decentralized renewable hybrid off-grid energy systems for localized (rural) applications in low-income countries. This paper presents the culmination of the IREP framework and aims to illustrate the final step of the IREP framework for two communities in Nigeria. It is focused on two aspects. Firstly, the techno-economic modeling (investment and operation optimization) of a hybrid mini-grid system using HOMER Pro, a techno-economic evaluation tool; and evaluating the benefits of demand side management (DSM) based on energy efficiency on the overall system economics using ...


Modeling And Analysis Of Single Phase Grid Connected Photovoltaic System, Swati Bhasme Sep 2020

Modeling And Analysis Of Single Phase Grid Connected Photovoltaic System, Swati Bhasme

International Journal of Power System Operation and Energy Management

This paper gives a complete computer simulation program of a single phase grid connected PV system using Matlab/Simulink and SimPower System tool in order to monitor the performance of each unit of the system during a selected day in the year representing a sunny day and another cloudy day using the hourly data of load demand, solar radiation and temperature at the college of Engineering, Pune site, as a case study. The system consists of a PV array subsystem as the primary source of energy, the electric grid as an auxiliary source of energy, the battery bank as a ...


Synchronising Renewable Energy Sources In Distributed Generation Systems, Amber Singh Sep 2020

Synchronising Renewable Energy Sources In Distributed Generation Systems, Amber Singh

International Journal of Power System Operation and Energy Management

The connection of power converters to the grid requires accurate control of synchronism between the renewable and distributed generation systems two sources. This paper discusses issues on synchronization of power converters connected to the mains and related control methods. The design and experimentation of a prototype of a 200 kW power converter that connects a wind generator to the grid help to validate the adopted approach. In this paper a new zero crossing synchronizer is proposed having zero error in steady state, moderate speed response to grid frequency changes and amplitude voltage variations, and harmonics and noise immunity. The speed ...


New Method To Harness More Wind Energy, M. Z. I. Sajid, K. Hema Chandra Reddy, E. L Nagesh Aug 2020

New Method To Harness More Wind Energy, M. Z. I. Sajid, K. Hema Chandra Reddy, E. L Nagesh

International Journal of Applied Research in Mechanical Engineering

A new and novel method to harness more wind energy has been designed Details of the experimental results and theoretical explanation is presented in the paper. The simplicity and economic viability of the method is expected to be a boon in converting poor windy sites to usable ones and to harness more energy at the existing windmill sites.


Photovoltaic Systems On Dairy Farms: Financial And Renewable Multi-Objective Optimization (Farmoo) Analysis, Michael Breen, J. Upton, Michael D. Murphy Aug 2020

Photovoltaic Systems On Dairy Farms: Financial And Renewable Multi-Objective Optimization (Farmoo) Analysis, Michael Breen, J. Upton, Michael D. Murphy

Dept. of Process, Energy & Transport Engineering

No abstract provided.


Potential Energy Generation From Agricultural Residue In Indonesia, Adrian Rizqi Irhamna Aug 2020

Potential Energy Generation From Agricultural Residue In Indonesia, Adrian Rizqi Irhamna

English Language Institute

Indonesia has great potential of biomass sources from their agricultural residue, which can potentially be used for alternative energy generation. This preliminary research explores the most suitable technology for energy generation from agricultural residue and its challenge for application in Indonesia. The study showed that biomass utilization via the direct combustion process is recommended for energy generation. It is also reported that the pretreatment process of drying and washing, are required to increase the fuel quality and plant efficiency.


Applying Renewable Energies Against Climate Change: Solar Photovoltaic (Pv) Energy, Juan Jose Estribi Aug 2020

Applying Renewable Energies Against Climate Change: Solar Photovoltaic (Pv) Energy, Juan Jose Estribi

English Language Institute

In recent years, more efforts towards fighting climate change have been done. As a direct response, research and technology have offered several insights regarding the specific causes, effects, and even possible solutions for resolving this global issue. Among these solutions, renewable energies and their potential contributions as clean energy sources can be assessed as feasible options for the energy transformation through the decarbonization process of the energy industry. This poster is mainly focused on solar photovoltaic (PV) energy and its great potential as a renewable energy by making a brief assessment of some important aspects such as resource availability, its ...


What Are The Advantages Of Replacing Fossil Fuels With Biofuels?, Amr Shaalan Aug 2020

What Are The Advantages Of Replacing Fossil Fuels With Biofuels?, Amr Shaalan

English Language Institute

Fossil fuels’ negative impact on the environment is leading many people to worry In addition to that, fossil fuels are running out as every day goes by. Thus, finding a renewable and environmentally friendly source of energy has now become a necessity. Biofuels offer clean energy that comes with numerous economic and environmental benefits. Furthermore, biofuels can absorb more carbon from the air than they would produce when burnt. Giving a chance to clear the air from fossil fuel’s carbon.


Zero Energy University Buildingsenergy Performance Evaluation Of Faculty Of Architectural Engineering In Tripoli's Branch, Osama Omar, Yathreb Sabsaby, Rehab Amro Aug 2020

Zero Energy University Buildingsenergy Performance Evaluation Of Faculty Of Architectural Engineering In Tripoli's Branch, Osama Omar, Yathreb Sabsaby, Rehab Amro

Architecture and Planning Journal (APJ)

One of the fastest growing trends in educational building design is Net Zero Energy buildings(ZEB). There are several buildings, either completed or under construction, that are committed to achieve this incredible level of energy efficiency [4]. The Fcaulty of Architecture building in BAU University is chosen as a case study to evaluate the energy performance in similar buildings in comparison with zero energy design strategies. The study used the findings from the analysis to identify and correct problem within the building. The aim of the research is to change the faculty building from an energy consumer to an energy ...


Numerical Simulation Of Thermoelectric Transport In Bulk And Nanostructured Sisn Alloys, Venkatakrishna Dusetty Jul 2020

Numerical Simulation Of Thermoelectric Transport In Bulk And Nanostructured Sisn Alloys, Venkatakrishna Dusetty

Masters Theses

The current high demand for sustainable and renewable energy sources to solve world energy crisis has enormously increased interest in looking at alternative sources of energy. All the machines used in manufacturing process, electricity generation, residential applications, transportation etc., rejects energy in the form of heat into environment. Thermoelectric materials can convert thermal-to-electrical and electrical-to-thermal energy and can be utilized in waste-heat harvesting, more efficient cooling to reduce energy usage and CO2 emissions. Significant research efforts have been devoted over the past decade to thermoelectric materials, with particular emphasis being placed on combining materials selection with nanostructuring. The overarching ...


Waste To Energy: Solid Fuel Production From Biogas Plant Digestate And Sewage Sludge By Torrefaction-Process Kinetics, Fuel Properties, And Energy Balance, Kacper Świechowski, Martyna Hnat, Paweł Stępień, Sylwia Stegenta-Dąbrowska, Szymon Kugler, Jacek A. Koziel, Andrzej Białowiec Jun 2020

Waste To Energy: Solid Fuel Production From Biogas Plant Digestate And Sewage Sludge By Torrefaction-Process Kinetics, Fuel Properties, And Energy Balance, Kacper Świechowski, Martyna Hnat, Paweł Stępień, Sylwia Stegenta-Dąbrowska, Szymon Kugler, Jacek A. Koziel, Andrzej Białowiec

Agricultural and Biosystems Engineering Publications

Sustainable solutions are needed to manage increased energy demand and waste generation. Renewable energy production from abundant sewage sludge (SS) and digestate (D) from biogas is feasible. Concerns about feedstock contamination (heavy metals, pharmaceuticals, antibiotics, and antibiotic-resistant bacteria) in SS and D limits the use (e.g., agricultural) of these carbon-rich resources. Low temperature thermal conversion that results in carbonized solid fuel (CSF) has been proposed as sustainable waste utilization. The aim of the research was to investigate the feasibility of CSF production from SS and D via torrefaction. The CSF was produced at 200~300 °C (interval of 20 ...


Energy And Economic Losses Due To Soiling On Utility Scale Pv Systems To Guide Timing Of Cost Effective Cleaning, Sophia Mcmillin Stockburger, Vicente Jesus Rios Jun 2020

Energy And Economic Losses Due To Soiling On Utility Scale Pv Systems To Guide Timing Of Cost Effective Cleaning, Sophia Mcmillin Stockburger, Vicente Jesus Rios

Electrical Engineering

The purpose of this senior project is to develop and recommend a cleaning schedule for Goldtree Solar Farm that is both economically beneficial and an efficient use of cleaning for the client. Solar farms can have various factors that influence the cleaning schedule such as weather behavior, time of the year, soiling, and other factors. Through this senior project, the goal is to assess these factors effect on the solar farm to produce a cleaning schedule that will maximize energy production, maximize profits, and prevent insignificant cleaning

This analysis is motivated by defining and promoting the benefits of regular maintenance ...


An Assessment Of Renewable Energy Technology Implementation In Storrs, Connecticut: Emissions Reduction And Feasibility Of A Microgrid System At Uconn, Sophie Macdonald May 2020

An Assessment Of Renewable Energy Technology Implementation In Storrs, Connecticut: Emissions Reduction And Feasibility Of A Microgrid System At Uconn, Sophie Macdonald

Honors Scholar Theses

The purpose of this project is to design a clean energy-sourced microgrid for UConn’s main campus that would reduce the university’s energy emissions while remaining within the geographic boundaries of viable UConn-owned land. Economic cost was not considered in this analysis; instead, emissions and space constraints were the optimized measures of value and feasibility. Sources of energy that were considered include photovoltaics (PV), wind turbines, hydrokinetic systems, and fuel cells. Energy storage capacity was included in the analysis as well. The overall system was optimized first by ignoring space constraints and for a minimum of 10% reduction from ...


Providing Sustainable Power Through Renewable Energy For Developing Communities In Central America, Elizabeth Topping May 2020

Providing Sustainable Power Through Renewable Energy For Developing Communities In Central America, Elizabeth Topping

Biological and Agricultural Engineering Undergraduate Honors Theses

Rural electrification through an expansion of the power grid into remote villages in Central America is a development that is still years away. Using renewable energy technology, access to electricity is available even in the most remote areas of the world. These individual power grids are also called “microgrids.” Creating microgrids in rural areas provides the people living there with access to power they did not have before. With this newfound access to power, these communities can expand their access to education, using computers or mobile devices. They can power lights, refrigerators, and other devices to continue development.

The design ...


Cybersecurity Methods For Grid-Connected Power Electronics, Stephen Joe Moquin May 2020

Cybersecurity Methods For Grid-Connected Power Electronics, Stephen Joe Moquin

Theses and Dissertations

The present work shows a secure-by-design process, defense-in-depth method, and security techniques for a secure distributed energy resource. The distributed energy resource is a cybersecure, solar inverter and battery energy storage system prototype, collectively called the Cybersecure Power Router. Consideration is given to the use of the Smart Green Power Node for a foundation of the present work. Metrics for controller security are investigated to evaluate firmware security techniques. The prototype's ability to mitigate, respond to, and recover from firmware integrity degradation is examined. The prototype shows many working security techniques within the context of a grid-connected, distributed energy ...


Nanomechanical Characterization Of Fuel Cell Ionomers, Jackson Goddard Apr 2020

Nanomechanical Characterization Of Fuel Cell Ionomers, Jackson Goddard

UCARE Research Products

Energy sustainability can be achieved by improving and adopting clean energy technologies, and a better nanoscale understanding of ionomer-catalyst layers could lead to increased efficiency of proton exchange membrane fuel cells. Samples of Nafion ( Perfluorosulfonic acid ionomer) and PFIA (Perfluoroimide acid ionomer) of varying film thickness were prepared and then studied using contact resonance force microscopy. It was determined that storage and loss modulus increase as relative humidity increases and ionomer film thickness goes below 100 nm. Furthermore, in this specific study, the similar storage and loss modulus of Nafion and PFIA could be attributed to similar backbone structure and ...


Net Energy Index: A New Way To Measure Energy Efficient Buildings, Dylan Suplee Apr 2020

Net Energy Index: A New Way To Measure Energy Efficient Buildings, Dylan Suplee

Senior Honors Theses

Energy efficiency indexes are useful for providing tangible measurements of energy efficiency in buildings. Buildings use approximately 70% of all electricity in the USA. Using that energy efficiently has two primary benefits: limiting greenhouse gas emissions and reducing grid strain. Utilizing local renewable energy sources contributes to the same benefits. Currently, there is no index that considers renewable energy sources when measuring energy efficiency. Therefore, this paper proposes the Net Energy Index, which compares the net power usage of a building to the floor area of the building in order to determine energy efficiency. If renewable energy supplies power to ...


Solar Energy Development And Social Sustainability: A Case Study On The Teknaf Solar Power Plant In Bangladesh, Zafrin Ahmed Liza, Hajera Aktar, Mohammad Rakibul Islam Mar 2020

Solar Energy Development And Social Sustainability: A Case Study On The Teknaf Solar Power Plant In Bangladesh, Zafrin Ahmed Liza, Hajera Aktar, Mohammad Rakibul Islam

Journal of Asian Energy Studies

Due to Bangladesh’s rapid development and fast-growing economy, the Government has placed an emphasis on ensuring a reliable and quality supply of electricity, to permit sustainable and financial development. The state’s policy on private sector involvement and the release of marginal lands for energy plantations is intended to enhance access to energy, through diversifying the energy supply. The country’s first solar park, with a capacity of 28 megawatts (MW), was established on 116 acres of land in Knila, Teknaf of Cox’s Bazar. This facility started producing electricity in September 2018, which is currently being added to ...


Analyzing Cost Effectiveness Of Photovoltaic Pavements, Ian N. Parks Mar 2020

Analyzing Cost Effectiveness Of Photovoltaic Pavements, Ian N. Parks

Theses and Dissertations

The United States Air Force (USAF) is the largest consumer of energy within the Department of Defense (DoD). As such, the USAF is continually looking for ways to reduce consumption, as well improving network resiliency and assuring supply. One potential method for addressing these items is focusing on applications of renewable energy. A specific application of renewable energy that could greatly benefit the USAF if viable would be photovoltaic (PV) pavements. PV pavements would be able to capitalize upon the large swathes of pavements on Air Force (AF) installations, while not being hampered by other concerns such as clear zones ...


Electrification Of Domestic Hot Water To Aid The Integration Of Renewable Energy In The California Grid, Alejandro Cervantes Jan 2020

Electrification Of Domestic Hot Water To Aid The Integration Of Renewable Energy In The California Grid, Alejandro Cervantes

HSU theses and projects

Water heating in residential buildings, also known as domestic hot water (DHW), is the third largest use of energy after appliances and space conditioning. About 90% of the residential buildings in the state use natural gas fueled water heaters, 6% use electricity, and a small percent use liquefied petroleum gas (LPG) or solar water heaters. The current energy use associated with residential water heating is small relative to the total amount of energy consumption in the residential building sector, but it is still a contributor of greenhouse gas (GHG) emissions. Improving hot water systems can be beneficial for bill customer ...


Experimental Investigation Of Low-Voltage Silicon Carbide (Sic) Semiconductor Devices For Power Conversion Applications, Saleh Salem H. Alharbi Jan 2020

Experimental Investigation Of Low-Voltage Silicon Carbide (Sic) Semiconductor Devices For Power Conversion Applications, Saleh Salem H. Alharbi

Electronic Theses and Dissertations

Enhancing the performance and efficiency of power converter systems requires fast-switching power devices with considerably low switching and conduction losses. Silicon (Si) semiconductor devices are the essential components in electronic converter designs, and their behaviors and switching characteristics determine the system’s overall performance and efficiency. These conventional Si devices are nearing to hit their physical and operational limits in meeting power converter requirements with respect to high temperature and large voltage conditions. However, silicon carbide (SiC) power devices enable greater converter efficiency and better power density, particularly under hard switching frequencies and high output voltages due to their outstanding ...


Experimental Evaluation Of Medium-Voltage Cascode Gallium Nitride (Gan) Devices For Bidirectional Dc–Dc Converters, Salah Salem H. Alharbi Jan 2020

Experimental Evaluation Of Medium-Voltage Cascode Gallium Nitride (Gan) Devices For Bidirectional Dc–Dc Converters, Salah Salem H. Alharbi

Electronic Theses and Dissertations

As renewable energy sources, such as photovoltaic (PV) cells and wind turbines, are rapidly implemented in DC microgrids, energy storage systems play an increasingly significant role in ensuring uninterrupted power supply and in supporting the reliability and stability of microgrid operations. Power electronics, especially bidirectional DC–DC converters, are essential parts in distributed energy storage and alternative energy systems because of their grid synchronization, DC power management, and bidirectional power flow capabilities. While there is increasing demand for more efficient, compact, and reliable power converters in numerous applications, most existing power converters are hindered by traditional silicon (Si) based semiconductors ...


Internet Of Things In Sustainable Energy Systems, Abdul Salam Jan 2020

Internet Of Things In Sustainable Energy Systems, Abdul Salam

Faculty Publications

Our planet has abundant renewable and conventional energy resources but technological capability and capacity gaps coupled with water-energy needs limit the benefits of these resources to citizens. Through IoT technology solutions and state-of-the-art IoT sensing and communications approaches, the sustainable energy-related research and innovation can bring a revolution in this area. Moreover, by the leveraging current infrastructure, including renewable energy technologies, microgrids, and power-to-gas (P2G) hydrogen systems, the Internet of Things in sustainable energy systems can address challenges in energy security to the community, with a minimal trade-off to environment and culture. In this chapter, the IoT in sustainable energy ...


Electric Grid Decarbonization Pathways: Landscape Impacts, Policy Interactions, And The Need For Cooperation, Austin Wesley Thomas Jan 2020

Electric Grid Decarbonization Pathways: Landscape Impacts, Policy Interactions, And The Need For Cooperation, Austin Wesley Thomas

Graduate College Dissertations and Theses

Climate change has motivated governments around the world to ratify aggressive greenhouse gas emissions reduction targets. Meeting these targets will require improved energy efficiency, behavior changes, and energy system decarbonization. Many climate change and energy policy targets imply the deployment of large amounts of low carbon, renewable energy resources like wind turbines and solar photovoltaic (PV) panels but do not specify how these resources will be sited on the landscape. The relationships between weather conditions, terrain, land cover, existing electric grid infrastructure, and electricity consumers will govern how these wind and solar PV infrastructure configurations develop and how quickly they ...