scholarly journals Trends in Waste-to-Energy Technologies for High Efficiency Power Generation

2015 ◽  
Vol 26 (2) ◽  
pp. 114-119
Author(s):  
Susumu Uno
Keyword(s):  
Power Generation ◽  
High Efficiency ◽  
Waste To Energy ◽  
Energy Technologies

scholarly journals Waste to energy

2014 ◽  
Vol 126 (2) ◽  
pp. 32 ◽  
Author(s):  
John Sanderson
Keyword(s):  
Power Generation ◽  
Power Plant ◽  
Energy Landscape ◽  
Landfill Gas ◽  
Waste To Energy ◽  
Large Energy ◽  
Energy Costs ◽  
Atmospheric Emissions ◽  
Energy Technologies ◽  
Energy Processes

Rising energy costs, increasing landfill prices and the environmental imperative to reduce atmospheric emissions of fossil CO2 are all compelling medium and large energy users throughout Australia to consider decentralised onsite power generation options. In addition to the rollout of household and community-scale photovoltaic (PV) and wind, waste-to-energy technologies such as landfill gas and biogas-based power plant are now well established in Australia. However, various other waste-to-energy technologies, operating elsewhere, have yet to take off. This presentation provided an overview of waste to- energy processes, including examples of currently operating commercial processes as well as recent research to highlight the interesting mix of processes and economics that make up the waste-to-energy landscape.

scholarly journals Review of Sustainable Energies Use in Greenhouses in Greece

2018 ◽  
Vol 5 (4) ◽  
pp. 35
Author(s):  
John Vourdoubas
Keyword(s):  
Power Generation ◽  
Environmental Pollution ◽  
Power Plants ◽  
High Efficiency ◽  
Waste Heat ◽  
Solar Pv ◽  
Northern Greece ◽  
Energy Technologies ◽  
Geothermal Fluids ◽  
Solid Biomass

Greenhouses consume large amounts of energy compared with other agricultural activities contributing to environmental pollution. However the current advances in sustainable energy technologies allow the use of benign energy sources for heat and power generation in them. Various renewable and high efficiency energy technologies are currently used in Greece or could be used in the near future in them. The technologies are mature, reliable and cost-effective. Among them the direct geothermal energy, solid biomass, solar-PV, waste heat re-use and co-generation of heat and power. Their use in small or larger greenhouses reduces the environmental pollution due to fossil fuels use, lowers the dependence on imported fuels, promote investments and create jobs in the local societies. Currently modern hydroponic greenhouses in northern Greece use co-generation of heat and power systems fuelled with natural gas. Heat is used in the greenhouses and the generated power is fed into the grid. Others utilize direct geothermal fluids for space heating. Solid biomass is also used for heating them. All of them can cover all the heating needs in greenhouses. Industrial rejected heat from lignite fired power plants in northern Greece could be easily used in the future for heating them. At the same time the high solar irradiance allows the use of solar photovoltaic (PV) systems for power generation in them. Further integration of sustainable energies in greenhouses in Greece requires the governmental support both in the form of financial subsidies and in removing the existing barriers preventing their use.

scholarly journals Renewable Power Generation: A Supply Chain Perspective

2021 ◽  
Vol 13 (3) ◽  
pp. 1271
Author(s):  
Faissal Jelti ◽  
Amine Allouhi ◽  
Mahmut Sami Büker ◽  
Rachid Saadani ◽  
Abdelmajid Jamil
Keyword(s):  
Power Generation ◽  
Supply Chain ◽  
Renewable Energy ◽  
Energy Supply ◽  
High Efficiency ◽  
Human Life ◽  
Renewable Power ◽  
Energy Technologies ◽  
Renewable Power Generation ◽  
Clean System

In recent years, the transition to a more sustainable and clean system has focused on the accelerated development of renewable energy technologies. This transition can be perceived as a major priority, especially with the current environmental concerns, threatening various aspects of human life. The objective of this article is, therefore, to highlight the role of the supply chain in the renewable power generation sector. In this context, a detailed assessment of the supply chain contribution to the renewable energy sector is presented. Next, the performance of the renewable energy supply chain is qualitatively evaluated by illustrating the various barriers against continuing development, and the key measures are recommended to overcome these barriers. Then, the main factors influencing the performance of the supply chain are identified and key performance indicators related to the renewable energy supply chain are established to achieve high efficiency and sustainability performances in the power sector.

scholarly journals Thermoelectric Materials, Phenomena, and Applications: A Bird's Eye View

MRS Bulletin ◽  
2006 ◽  
Vol 31 (3) ◽  
pp. 188-198 ◽  
Author(s):  
Terry M. Tritt ◽  
M. A. Subramanian
Keyword(s):  
Power Generation ◽  
Solid State ◽  
Alternative Energy ◽  
Fossil Fuels ◽  
High Efficiency ◽  
Waste Heat ◽  
Electrical Energy ◽  
New Materials ◽  
Energy Technologies

AbstractHigh-efficiency thermoelectric (TE) materials are important for power-generation devices that are designed to convert waste heat into electrical energy.They can also be used in solid-state refrigeration devices.The conversion of waste heat into electrical energy may play an important role in our current challenge to develop alternative energy technologies to reduce our dependence on fossil fuels and reduce greenhouse gas emissions.An overview of various TE phenomena and materials is provided in this issue ofMRS Bulletin. Several of the current applications and key parameters are defined and discussed.Novel applications of TE materials include biothermal batteries to power heart pacemakers, enhanced performance of optoelectronics coupled with solid-state TE cooling, and power generation for deep-space probes via radioisotope TE generators.A number of different systems of potential TE materials are currently under investigation by various research groups around the world, and many of these materials are reviewed in the articles in this issue.These range from thin-film superlattice materials to large single-crystal or polycrystalline bulk materials, and from semiconductors and semimetals to ceramic oxides.The phonon-glass/electron-crystal approach to new TE materials is presented, along with the role of solid-state crystal chemistry.Research criteria for developing new materials are highlighted.

Waste to Energy Conversion and Sustainable Recovery of Nutrients from Pee Power - Recent Advancements in Urine-Fed MFCs

2020 ◽  
Vol 17 (7) ◽  
pp. 768-779
Author(s):  
Natarajan Narayanan ◽  
Vasudevan Mangottiri ◽  
Kiruba Narayanan
Keyword(s):  
Power Generation ◽  
Microbial Fuel Cells ◽  
Alternative Energy ◽  
Material Selection ◽  
Waste Product ◽  
Resource Recovery ◽  
Operating Conditions ◽  
Waste To Energy ◽  
Animal Origin ◽  
Human Beings

Microbial Fuel Cells (MFCs) offer a sustainable solution for alternative energy production by employing microorganisms as catalysts for direct conversion of chemical energy of feedstock into electricity. Electricity from urine (urine-tricity) using MFCs is a promising cost-effective technology capable of serving multipurpose benefits - generation of electricity, waste alleviation, resource recovery and disinfection. As an abundant waste product from human and animal origin with high nutritional values, urine is considered to be a potential source for extraction of alternative energy in the coming days. However, developments to improve power generation from urine-fed MFCs at reasonable scales still face many challenges such as non-availability of sustainable materials, cathodic limitations, and low power density. The aim of this paper was to critically evaluate the state-of-the-art research and developments in urine-fed MFCs over the past decade (2008-2018) in terms of their construction (material selection and configuration), modes of operation (batch, continuous, cascade, etc.) and performance (power generation, nutrient recovery and waste treatment). This review identifies the preference for sources of urine for MFC application from human beings, cows and elephants. Among these, human urine-fed MFCs offer a variety of applications to practice in the real-world scenario. One key observation is that, effective disinfection can be achieved by optimizing the operating conditions and MFC configurations without compromising on performance. In essence, this review demarcates the scope of enhancing the reuse potential of urine for renewable energy generation and simultaneously achieving resource recovery.

scholarly journals Research on the Performance of Solar Aided Power Generation System Based on Annular Fresnel Solar Concentrator

Energies ◽  
2021 ◽  
Vol 14 (6) ◽  
pp. 1579
Author(s):  
Heng Zhang ◽  
Na Wang ◽  
Kai Liang ◽  
Yang Liu ◽  
Haiping Chen
Keyword(s):  
Power Generation ◽  
High Efficiency ◽  
Low Cost ◽  
Economic Index ◽  
Partial Replacement ◽  
Solar Concentrator ◽  
Small Disturbance ◽  
Step Size ◽  
Water Matrix ◽  
Cost Utilization

A solar-aided power generation (SAPG) system effectively promotes the high efficiency and low cost utilization of solar energy. In this paper, the SAPG system is represented by conventional coal-fired units and an annular Fresnel solar concentrator (AFSC) system. The annular Fresnel solar concentrator system is adopted to generate solar steam to replace the extraction steam of the turbine. According to the steam–water matrix equation and improved Flugel formula, the variable conditions simulation and analysis of the thermo-economic index were proposed by Matlab. Furthermore, in order to obtain the range of small disturbance, the method of partial replacement is used, that is, the extraction steam of the turbine is replaced from 0 to 100% with a step size of 20%. In this work, a SAPG system is proposed and its thermo-economic index and small disturbance scope are analyzed. The results show that the SAPG system is energy-saving, and the application scope of small disturbance is related to the quantity of the extraction steam and evaluation index.

Waste-to-Energy Technologies Towards Circular Economy: a Systematic Literature Review and Bibliometric Analysis

2021 ◽  
Vol 232 (7) ◽  
Author(s):  
Ronney Arismel Mancebo Boloy ◽  
Augusto da Cunha Reis ◽  
Eyko Medeiros Rios ◽  
Janaína de Araújo Santos Martins ◽  
Laene Oliveira Soares ◽  
...  
Keyword(s):  
Literature Review ◽  
Bibliometric Analysis ◽  
Systematic Literature Review ◽  
Circular Economy ◽  
Waste To Energy ◽  
Energy Technologies

High efficiency GeTe-based materials and modules for thermoelectric power generation

2021 ◽  
Author(s):  
Tong Xing ◽  
Qingfeng Song ◽  
Pengfei Qiu ◽  
Qihao Zhang ◽  
Ming Gu ◽  
...  
Keyword(s):  
Power Generation ◽  
Thermoelectric Power ◽  
Heat Recovery ◽  
Waste Heat Recovery ◽  
High Efficiency ◽  
Waste Heat ◽  
Thermoelectric Performance ◽  
Thermoelectric Generators ◽  
Thermoelectric Power Generation

GeTe-based materials have a great potential to be used in thermoelectric generators for waste heat recovery due to their excellent thermoelectric performance, but their module research is greatly lagging behind...

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