scholarly journals Special Issue on Wind Turbine Aerodynamics II

2021 ◽  
Vol 11 (18) ◽  
pp. 8728
Author(s):  
Wen Zhong Shen
Keyword(s):  
Air Pollution ◽  
Global Warming ◽  
Renewable Energy ◽  
Wind Turbine ◽  
Special Issue ◽  
Wind Turbine Aerodynamics ◽  
The World

To alleviate global warming and reduce air pollution, the world needs to rapidly shift towards renewable energy [...]

scholarly journals Special Issue on Wind Turbine Aerodynamics

2019 ◽  
Vol 9 (9) ◽  
pp. 1725 ◽  
Author(s):  
Wen Zhong Shen
Keyword(s):  
Renewable Energy ◽  
Wind Energy ◽  
Wind Turbine ◽  
Energy Systems ◽  
Special Issue ◽  
Wind Turbine Aerodynamics ◽  
The World

In order to reach the goal of 100% renewable energy in energy systems, wind energy, as a pioneer of renewable energy, is developing very quickly all over the world [...]

Modelling and Control of the Hydraulically Actuated Horizontal Axis Wind Turbine Pitch System

2019 ◽  
Author(s):  
P. Venkaiah ◽  
B. K. Sarkar
Keyword(s):  
Renewable Energy ◽  
Wind Energy ◽  
Wind Turbine ◽  
Wind Power ◽  
Pid Controller ◽  
Renewable Energy Sources ◽  
Horizontal Axis ◽  
Energy Sources ◽  
Horizontal Axis Wind Turbine ◽  
The World

Abstract The advantages of renewable energy sources are available freely in nature, inexhaustible, produce either no or little pollution and low gestation period. Among all renewable energy sources, wind energy has become one of the leading resources for power production in the world as well as in the India. According to WWEA, the wind turbine installation capacity in the world has been reached over 539.291GW by the end of 2017. The entire wind power installed capacity by the end of 2017 covers more than 5% of global demand of electricity. In India, the present wind power installation capacity on October, 2017 was over 32.7GW and wind energy contribution is 55% of the total renewable energy capacity in the country. Inspite of having sharp growth rate in wind in India, only a fraction of wind energy has been tapped until now out of 302 GW wind potential which is available above 100 m height on shore. Practical horizontal axis wind turbine converts kinetic energy in the wind into useful energy by using airfoil blades. Blade element momentum (BEM) theory becomes very popular due to its simplicity in mathematical calculation as well as accuracy. Hydraulic pitch actuation system has certain advantages due to its versatility, ability to produce constant force and torque irrespective of the disturbances outside of the system, ease and accuracy of control, simplicity, safety and economy. In the present study a semi rotary actuator has been utilized for turbine pitch actuation. In order to extract maximum power from available wind, fractional order PID controller (FOPID) has been developed for pitch control of wind turbine rotor blade. The performances of PID as well as FOPID controller have been compared with available wind data. The performance of FOPID controller was satisfactory compare to PID controller.

scholarly journals An Investigation into the Pinnacle of Environment and Measures to Protect it with Special Reference to Renewable Energy as a Benison for Our Planet

2021 ◽  
Vol 16 (2) ◽  
pp. 563-574
Author(s):  
Dr. Hanumant Singh Chouhan
Keyword(s):  
Global Warming ◽  
Renewable Energy ◽  
Waste Disposal ◽  
Natural World ◽  
Climate Conditions ◽  
Environmental Destruction ◽  
Greenhouse Emissions ◽  
Northern Latitudes ◽  
The World ◽  
Regional Climates

Man does harm to the climate, water, ground, the different components of the world, and to nature itself, all round. There is just so much man-made waste and environmental destruction that the uncertainty waiting is sufficiently anxious to wake us up. A few developments are taking place from a climatologically standpoint of the overall scenario. Our national and regional climates are both highly polluted. In the densely developed elevations of the northern latitudes, the defensive ozone layer is fading twice as quickly as scientists assumed several years earlier. The accumulation of greenhouse emissions would contribute in the immediate term to major shifts in climate conditions due to global warming. The consequences of environmental degradation are on not only humans, but also on other living creatures as well as the natural world. The issue of environmental contamination and waste disposal will be discussed in this article. All that surrounds us is linked to the environment knowingly or unknowingly. The author of this paper is expressing in what condition our environment is now. What measures can be taken to preserve our environment? Furthermore, he discusses how renewable energy is a boon for our planet that may be proven to be a boon if individuals use it effectively.

scholarly journals INTRODUCTION: SPECIAL ISSUE ON ‘MACROECONOMICS OF CLIMATE CHANGE’

2021 ◽  
Vol 258 ◽  
pp. 9-11
Author(s):  
Dawn Holland ◽  
Hande Kucuk ◽  
Miguel León-Ledesma
Keyword(s):  
Climate Change ◽  
Global Warming ◽  
Paris Agreement ◽  
Extreme Temperatures ◽  
Special Issue ◽  
Special Report ◽  
Sea Levels ◽  
The World ◽  
Human Cost ◽  
Rising Sea Levels

Climate change is one of the most serious risks facing humanity. Temperature rises can lead to catastrophic climate and natural events that threaten livelihoods. From rising sea levels to flooding, bush fires, extreme temperatures and droughts, the economic and human cost is too large to ignore. More than 190 world leaders got together in Glasgow during November 2021 at the UN’s COP26 climate change summit to discuss progress on the Paris Agreement (COP21) and to agree on new measures to limit global warming. In Paris, countries agreed to limit global warming to well below 2° and aim for 1.5° as well as to adapt to the impacts of a changing climate and raise the necessary funding to deliver on these aims. However, actions to date were not nearly enough as highlighted by the IPCC (2018) special report. The world is still on track to reach warming above 3° by 2100. As evident from figure 1, global temperatures have been on a steadily increasing path since the start of the 20th century and this process has substantially accelerated since the beginning of the 1980s. This has been unevenly distributed, with temperatures in the Northern hemisphere being a full 1°C higher than for the 1961–1990 average, whilst temperatures in the Southern hemisphere have increased by almost 0.5°C.

1. What are renewables?

2020 ◽  
pp. 1-15
Author(s):  
Nick Jelley
Keyword(s):  
Climate Change ◽  
Global Warming ◽  
Renewable Energy ◽  
Mass Production ◽  
Fossil Fuels ◽  
Industrial Revolution ◽  
18Th Century ◽  
Clean Energy ◽  
The World ◽  
History Of

‘What are renewables?’ defines renewable energy and provides a brief history of its use. It focuses on energy generated by solar, wind, and hydropower. These energy sources are renewable, in the sense that they are naturally replenished within days to decades. Only a few years ago, giving up our reliance on fossil fuels to tackle global warming would have been very difficult, as they are so enmeshed in our society and any alternative was very expensive. Nearly all of the sources of energy up to the 18th century were from renewables, after which time the world increasingly used fossil fuels. They powered the industrial revolution around the globe, and now provide most of our energy. But this dependence is unsustainable, because their use causes global warming, climate change, and pollution. Other than hydropower, which grew steadily during the 20th century and now provides almost a sixth of the world’s electricity demand, renewable energy was a neglected resource for power production for most of this period, being economically uncompetitive. But now, renewables are competitive, particularly through the support of feed-in tariffs and mass production, and governments are starting to pay more attention to clean energy, as the threat of climate change draws closer. Moving away from fossil fuels to renewables to supply both heat and electricity sustainably has become essential.

scholarly journals Editorial: Building integrated renewable energy

2020 ◽  
pp. 014459872095251
Author(s):  
Yaolin Lin ◽  
Wei Yang ◽  
Xiaoli Hao ◽  
Changxiong Yu
Keyword(s):  
Energy Efficiency ◽  
Renewable Energy ◽  
Greenhouse Gas Emission ◽  
Experimental Studies ◽  
Building Energy ◽  
Energy Performance ◽  
Energy Utilization ◽  
Building Energy Efficiency ◽  
Special Issue ◽  
The World

About one-third of the primary energy in the world is consumed by buildings. A large amount of CO2 emission due to building energy consumption has threatened the sustainable development of the world. Improvement on the building energy performance, especially by integration with renewable energy resources has attracted interest worldwide to reduce greenhouse gas emission to make our society more sustainable. This Special Issue on building integrated renewable energy was open to all contributors in the field of building energy efficiency. The original experimental studies, numerical simulations, and reviews in all aspects of renewable energy utilization, management, and optimization have been considered. In the event, all these topics were covered in the extensive submissions accepted, but interesting papers on other aspects of building energy efficiency were also received. The purpose of this editorial is to summarize the main research findings of accepted papers in this Special Issue, including the use of renewable energy and energy saving technologies in buildings and identify a number of research questions and research directions.

scholarly journals Special Issue on Plasma Processes for Renewable Energy Technologies

Energies ◽  
2019 ◽  
Vol 12 (23) ◽  
pp. 4416
Author(s):  
Masaaki Okubo
Keyword(s):  
Global Warming ◽  
Renewable Energy ◽  
Effective Solution ◽  
Special Issue ◽  
Renewable Energy Technologies ◽  
Energy Technologies

The use of renewable energy is an effective solution to mitigate global warming [...]

Mini Wind Plant to Power Telecommunication Systems: A Case Study in Sicily

2012 ◽  
Vol 622-623 ◽  
pp. 1078-1083 ◽  
Author(s):  
Giuseppina Ciulla ◽  
Vincenzo Franzitta ◽  
Valerio Lo Brano ◽  
Alessia Viola ◽  
Marco Trapanese
Keyword(s):  
Air Pollution ◽  
Renewable Energy ◽  
Low Power ◽  
Wind Turbine ◽  
Energy Systems ◽  
Power Lines ◽  
Renewable Energy Systems ◽  
Telecommunication Systems ◽  
Main City

The ever increasing problems related to air pollution and the difficulties for power lines to reach inaccessible areas are pushing to find new solutions for powering telecommunications equipments (TLC). The renewable energy systems, although relatively expensive, have the required characteristics. The purpose of this work is to find a solution based on a low power wind turbine to serve a real telecommunication site located near Palermo, the main city of Sicily (Italy).

Experimental Investigations on the Effect of Flow Area of Nano Coated Catalytic Converter

2014 ◽  
Vol 984-985 ◽  
pp. 471-475
Author(s):  
Nattan Ravichandiran ◽  
Ramalingam Senthil ◽  
Govindasamy Mohan
Keyword(s):  
Air Pollution ◽  
Global Warming ◽  
Combustion Engine ◽  
Catalytic Converter ◽  
Vital Role ◽  
Wire Mesh ◽  
Experimental Investigations ◽  
Flow Area ◽  
The World ◽  
The Wire

Now a days the global warming and air pollution are big issue in the world. The more amount of air pollution is due to emissions from an internal combustion engine. Catalytic converter plays a vital role in reducing harmful gases. In this study, the nanocoated catalytic converter efficiency was focused. The flow area of catalytic converter plays a vital role in the conversion of the harmful gases NOx, CO & UHC. The wire mesh coated with Alumina and Ti02 was the conversion medium. By varying the length of the wire mesh, the flow area was changed. The length of the wire mesh substrate was varied by 100mm, 150mm and 200mm. It was experimentally found that the increase in flow area reduces the exhaust emissions smoke, CO, HC and NOx.

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