Day 1 :
- Green Energy | Renewable Energy | Green Nanotechnology | Waste to Energy
Aalborg University, Denmark
Luona Xu received the B.S. degree in Electrical Engineering and Automation from China Agricultural University, Beijing, China, in 2014, and M.S. degree in Electrical Engineering from University of Chinese Academy of Sciences, Beijing, China, in 2017. From 2017 to 2019, she was an electrical engineer in East China Electric Power Design Institute Co., Ltd., Shanghai, China. She is currently working toward the PhD degree at AAU Energy, Aalborg University, Denmark. Her research interests include coordinated control for shipboard microgirds and pulsed load power supply in maritime application.
Integrated Power Systems (IPSs) in electric ships are popular in the maritime industry. Medium Voltage DC (MVDC) Shipboard Micro Grids (SMGs) have many advantages compared with AC ones in terms of system efficiency, operation flexibility, and component size. However, the study and application of MVDC SMGs are still in exploration stage, and many challenges need to be solved before commercial applications. In this presentation, an overview of MVDC SMGs including the hardware composition and control system, as well as future research trends are introduced. By reviewing and summarizing existing scientific research literatures, industrial reports, standards, and commercial products, existing and potential system configurations, and power components, including power sources, energy storage devices, shipboard loads, and power converters (rectifiers, inverters, and DC/DC converters), and their comparisons in MVDC SMGs are discussed. Based on the comparisons, design recommendations for different types of ships from the aspects of system architecture and power components are presented. Besides, from the aspects of control system, general control configurations and special issues in DC electric ship application, such as the integration of energy storage system, the stability issue related to pulsed power loads, and the protection system in DC SMGs are discussed as well. This review gives insight into the design and control of DC system for modern electric ships (Figure 1).
University of Huddersfield, United Kingdom
Warmate Awoloye is an oil and gas and energy enthusiast with over 10 years of experience. He obtained his master’s degree in Oil and Gas Engineering with Management at the School of Computing and Engineering, University of Huddersfield where he obtained the prestigious vice-chancellor’s scholarship award for his PhD. His research area borders on numerical analysis and design of Renewable/Advanced Energy Systems for offshore and other service industries.
Statement of the problem: Climate change remains one of the world’s greatest challenges today and as we move faster towards actualizing the UN 2030 sustainable developmental agenda and the goals of the Paris Agreement, the need for building new energy economies cannot be overemphasized howbeit, not many a country’s major energy source has shifted wholly, from those that impact negatively on the environment with circa 43.6% energy generated from combustible fuels (Eurosat, 2021) and, as the world spring back to full-scale business after the COVID break, these demands are projected to increase.
Suffice to say that almost all commercial power needs are still being generated by turbines with steam turbine contributing more than 80% worldwide using varieties of heat sources and hence, impacting on the environment. The purpose of this study is to suggest the use of Tesla turbine as a better substitute to steam and coal-fired turbines for world power generation as it offers more economically viable, safe, reliable, and most importantly, ozone-friendly solutions whilst in use.
Methodology & theoretical framework: The Tesla turbine works by the principle of boundary layer effect due to the adhesive forces generated between the fluid and co-connected disk rotors .Numerical analysis was employed using both continuity equation and the Navier-Stokes equation for fluid modeling. Several CAD models were designed using Solid Works and simulations done using Ansys CFX/Fluent software.
Findings: It was observed that several factors as nozzle geometry, fluid angle of attack, disk type/size and disk spacing/number significantly affected the efficiency of the turbine. A 3-disk arrangement gave maximum efficiencies >90%.
Northumbria University, UK
Varun Vijayamohan is experienced in solving real-time problems with an engineering solution, is experienced in handling various projects and is designated as the project manager. He has observed a problem in the manufacturing sector and solved it by inventing an exoskeleton chair for the employees. With his passion for technology and environmental wellness he writes snippet articles on LinkedIn to take the new emerging technology in the field of the renewable energy sector and helps readers understand the need to change from conventional to non-conventional sources of energy.
Problem statement: Owing to the heavy growth in population and pollution currently the global generation of electricity is shifting from fossil fuel to green energy. One such suite of renewable energy is ocean energy. However, the reasons for the stakeholder who doesn’t show much interest in ocean technology have been due to factors like high cost (operation and maintenance), poor technological advancements such as wind and solar, and site selection. Meanwhile, there is still research going on in harvesting the potentiality of ocean energy. The purpose of this study is to bring out the potentiality of the ocean technologies such as: tidal and wave energy technologies, discussing the future industrial interests, present technologies and Levelised Cost of Energy (LCOE).
Methodology and theoretical orientation: An in-depth knowledge about ocean technology was attained by referring to journals and books. Framework and comparison charts were utilized to get in-sight details of ocean energy. Visually viewed the working principles and construction of tidal and wave plants online.
Findings: Scientists and Engineers have reported that ocean energy minimizes the usage of fossil fuel and coal dependency as it can contribute to 100% of the world's energy demands. Ocean, Marine, or Blue energy is a renewable source that has the potential to generate nearly 10,000–80,000 TWh of electricity per year. The researchers have encountered many gaps in the development of tidal and wave technologies because of a lack of awareness among stakeholders and high costs. Although the potentiality for these technologies is high there is a lack of new technologies in this field of green energy.
Ahilan Raman, a versatile Chemical engineer with over 37 years of experience mainly in R&D, Innovation and Commercialisation. He has successfully commercialised various process technologies in the past. He holds national and international patent on seawater desalination known as CAPZ desalination technology. He has recently filed a provisional patent application with IP Australia to generate a synthetic fuel known as RSMG (renewable synthetic methane gas) directly from the seawater.
Carbon recycling technology is a patented technology by an Australian company, Clean Energy and Water Technologies (CEWT). Ahilan Raman has recently filed a provisional patent application with IP Australia to generate a synthetic fuel known as RSMG (renewable synthetic methane gas) directly from the seawater. RSMG will be used as a fuel in a gas turbine to generate a base load power (24x7) and the emitted CO2 is captured and converted back into RSMG using a renewable energy source such as solar and wind etc. so that the plant can achieve ZERO EMISSIONS while generating continuous electricity. Ocean is the largest sink for direct CO2 absorption from the atmosphere and it is prudent and economical to derive CO2 from sea rather than from air where CO2 concentration is only 415 ppm. The concentration of CO2 in seawater is more than 100 times than that of the air. Currently CEWT is in the process of demonstration CRT in India. The demonstration plant is installed in an existing and operating PV solar farm of 100 Mw capacities. A small gas turbine of capacity 1.20 Mw is installed in the same solar farm using LNG as a start-up fuel. The CO2 emitted in the gas turbine is further heated to 900ºC along with steam and subject to high temperature electrolysis using a Solid Oxide Electrolyser Cell (SOEC) to generate syngas (mixture of CO and Hydrogen). The Syngas is further methanated using Renewable Hydrogen (RH) in a reactor using a proprietary catalyst to generate SRMG along with steam. The RSMG is recycled as a fuel to fire the gas turbine to supply base load power to the grid. The renewable power imported from the grid is exported back into the grid using gas turbine so that a PV solar farm which generates an intermittent Renewable energy is converted into a stable base load power continuously exported to the grid. This technology allows leveraging a renewable energy source into a base load power without using any storage devices like battery. It also achieves ZERO CARBON EMISSION. It will be the first of its kind technology in the world.
Universitas PGRI Semarang, Indonesia
Irna Farikhah, PhD is currently an Assistant Professor at Mechanical Engineering, Universitas PGRI Semarang, Indonesia. She holds a PhD degree from Tokyo University of Agriculture and Technology Japan majoring in System Engineering. Moreover, she published some articles in some International Journals and Proceedings from International Conferences in Singapore, Tokyo and London. In 2019, she got scholarship from Turkish government as a research fellowship in Department of Mechanical Engineering, Celal Bayar University, Turkey. In 2020, she has appointed as a visiting research fellow at the Universitas Malaysia Perlis (UniMAP). She is also a member of World Society of Sustainable Energy Technologies (WSSET).
Handling thermal pollution due to the industrial waste heat is required to minimize the impact of the emitted thermal heat on the environment. There are some technologies that can be used to recovery the waste heat, one of which is thermoacoustic technology. In recent years, converting low-grade energy into valuable energy such as acoustic for driving cooler has become an applicable method to regain wasted thermal energy. The thermoacoustic engine can convert thermal into acoustic energy then the acoustic energy could be transferred for refrigeration. Thermoacoustic technology can be divided into two parts: one is thermoacoustic engine and cooler (Figure 1). To design the cooler system having high efficiency and lower onset heating temperature (Figure 2), the varied cooling temperature is numerically investigated from -15 to 150C. The heating temperature generating acoustic power can be decreased from 256 to 2050C. Moreover, 6% of Thermodynamic upper limit value of the whole system is achieve and the efficiency of the engine, cooler and tube are 66%, 41% and 23%, respectively when the cooling temperature is -150c and the heating temperature is 2560C.