ANALISIS EKSPERIMENTAL KINERJA TURBIN VORTEX AKIBAT PERUBAHAN TINGGI IMPELLER TIPE SUDU BERPENAMPANG LURUS

The use of fossil fuels is now increasing while these resources will be used up if used continuously and these energy resources require a long process to be reused. Alternative energy sources and renewable energy reserves in Indonesia are quite large, but their development has not been optimal because of the geographical gap between the location of energy supply and demand and high technology investment to develop new renewable energy-based technologies and the application of new renewable energy technologies, especially in the electricity sector and as fuel. Based on research that has been carried out on the mechanics of involute inward vortex inflows, the optimal size of the impeller height has not yet been found. This study uses an experimental research method, namely by making a vortex turbine with a straight-section blade type that has a blade height of 180 mm, 210 mm and 240 mm with a water capacity of 10.1471 L / s. loading variations used 3 kg, 3.5 kg, 4 kg, 4.5 kg, 5 kg, 5.5 kg and 6 kg. Tests will be carried out with the above variables on torque, mechanical power and vortex turbine efficiency. The results obtained that the height of the impeller 210 mm has torque, mechanical power and optimal efficiency than the impeller height of 180 mm and 240 mm. The highest mechanical power produced by turbines with an impeller height of 210 mm at a capacity of 10.1471 L / s with a load of 6 kg has a mechanical power of 24.28 watts. The highest efficiency is owned by turbines with a height of 210 mm occurred at a capacity of 10.1471 L / s with a loading of 6 kg, having an efficiency of 37.93%. This is because by adding the height of the impeller to the turbine, the area of the blade affected by the impact of the water fluid becomes more, even when given the turbine loading conditions are not completely submerged. The more blade area submerged by fluid has a more significant influence on the power and efficiency produced than turbines that are resistant to loading even though the turbine is perfectly submerged.

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The prevalence of renewable energy in the Russian energy market

E3S Web of Conferences ◽

10.1051/e3sconf/201912404018 ◽

2019 ◽

Vol 124 ◽

pp. 04018

Author(s):

E. A. Konnikov ◽

K. V. Osipova ◽

N. A. Yudina ◽

E.P. Korsak

Keyword(s):

Renewable Energy ◽

Power Supply ◽

Alternative Energy ◽

Fossil Fuels ◽

Renewable Energy Sources ◽

Energy Sources ◽

Energy Market ◽

Alternative Energy Sources ◽

World Energy ◽

The Impact

The energy crisis of 1973-1974 showed that it is difficult to constantly increase the power supply of production, based only on traditional energy sources. The power supply of society is the basis of its scientific and technological progress. It means that it is necessary to introduce unconventional, alternative energy sources more widely. Unlike fossil fuels, unconventional forms of energy are not limited to geologically reserves. Their use and consumption does not lead to the inevitable exhaustion of stocks. However, currently, the reform of world energy markets and increasing the share of renewable energy sources in their structure is a long and innovative process. Lots of countries (Russia in particular) bear significant risks because of reforming their own energy market, which causes a slight increase in the share of renewable energy sources. In this regard, the purpose of this study is to analyse the influence of environmental factors on the development of renewable energy sources in Russia. The result of this study is a system of econometric equations, which allows to evaluate the impact of changes in key drivers of the development of the renewable energy market.

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Cooling and Heating with Ground Source Energy

Sustainable Practices ◽

10.4018/978-1-4666-4852-4.ch014 ◽

2013 ◽

pp. 261-278

Author(s):

Abdeen Mustafa Omer

Keyword(s):

Renewable Energy ◽

Alternative Energy ◽

Fossil Fuels ◽

Renewable Energy Sources ◽

Energy Sources ◽

Direct Expansion ◽

Alternative Energy Sources ◽

Operation Conditions ◽

Heating And Cooling ◽

Ground Source

In the recent attempts to stimulate alternative energy sources for heating and cooling of buildings, emphasis has been put on utilisation of the ambient energy from ground source and other renewable energy sources. Exploitation of renewable energy sources and particularly ground heat in buildings can significantly contribute towards reducing dependency on fossil fuels. This paper highlights the potential energy saving that could be achieved through use of ground energy source. It also focuses on the optimisation and improvement of the operation conditions of the heat cycles and performances of the DX GSHP. It is concluded that the direct expansion of GSHP are extendable to more comprehensive applications combined with the ground heat exchanger in foundation piles and the seasonal thermal energy storage from solar thermal collectors. This article discusses the principle of the ground source energy, varieties of GSHPs, and various developments.

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Environmental substantiation for the use of alternative energy sources

E3S Web of Conferences ◽

10.1051/e3sconf/202124401007 ◽

2021 ◽

Vol 244 ◽

pp. 01007

Author(s):

Svetlana Ovchinnikova ◽

Aleksandr Borovkov ◽

Galina Kukinova ◽

Nina Markina

Keyword(s):

Renewable Energy ◽

Intelligent Systems ◽

Alternative Energy ◽

Fossil Fuels ◽

Predictive Analytics ◽

Renewable Energy Sources ◽

Climatic Conditions ◽

Household Waste ◽

Energy Sources ◽

Alternative Energy Sources

An overview of the substantiation of the relevance of the transition to mass ecological housing construction, which is determined by an acute shortage of housing and a high increase in the cost of electricity, is given. The development of an ecological substantiation of an energy-independent house using the example of a one-story house, taking into account natural and climatic conditions, is presented. The characteristics of the work of all utilized engineering systems are considered. It has been established that the housing and utilities sector, being one of the main sources of air and groundwater pollution, creates a large amount of household waste, which has a detrimental effect on the environmental situation. Renewable energy sources have an inexhaustible supply, since they are obtained from natural processes that will not be exhausted in the foreseeable future. Thus, the prospects for renewable energy sources are in considering them to replace fossil fuels. Economic efficiency is defined, which implies that the energy source is economical both in relation to the net cost of production and in relation to supply. The development of renewable energy sources will play an important role in the transformation and digitalization of the Russian power industry. Technologies of energy storage, intelligent systems for forecasting production and demand, predictive analytics of equipment condition, consumption management and many others will be developed.

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Comparative effectiveness of environmental regulation instruments: Case of the Moroccan electricity mix

AIMS Energy ◽

10.3934/energy.2021050 ◽

2021 ◽

Vol 9 (5) ◽

pp. 1097-1112

Author(s):

Soufiyan Bahetta ◽

◽

Nabil Dahhou ◽

Rachid Hasnaoui ◽

◽

...

Keyword(s):

Renewable Energy ◽

Environmental Regulation ◽

Environmental Sustainability ◽

Fossil Fuels ◽

Carbon Tax ◽

Electricity Sector ◽

Energy Technologies ◽

Emission Standards ◽

Electricity Mix ◽

The Impact

<abstract> <p>Fossil fuels dominate the electricity mix of Morocco, the country is placing renewable energy at the heart of its energy strategy, to improve the security of supply and ensure environmental sustainability. However, the penetration of renewable energy technologies (RET) in the Moroccan electricity mix remains low due to an excess of investment in conventional energy technologies. This study first explores the characteristics of the Moroccan electricity mix before studying the dynamic effects of environmental regulatory instruments, in particular the carbon tax and the emission standards. To do so, we analyzed scenarios using a bottom-up linear and dynamic optimization model « OSeMOSYS» . We will therefore assess the impact of the carbon tax and the emission standards on RET adoption in the Moroccan electricity mix, over a period from 2015 to 2040. Our results suggest that environmental regulation in the electricity sector will lead to a large diversification of the Moroccan electricity mix with a large penetration of RET thus reducing the overall production of conventional energy technologies. Therefore, it follows that the carbon tax encourages the adoption of RET in the Moroccan electricity mix with significant reductions on fuel costs and operating & maintenance (O & M) costs of conventional energy technologies compared to emission standards.</p> </abstract>

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Renewable Energy: Non-environmental Reasons to Make the Transition

Pitt Political Review ◽

10.5195/ppr.2017.95 ◽

2017 ◽

Vol 12 (1) ◽

pp. 43-48

Author(s):

Andrew Johnson

Keyword(s):

Renewable Energy ◽

Alternative Energy ◽

Fossil Fuels ◽

Fossil Fuel ◽

Energy Sources ◽

Renewable Sources ◽

Oil Companies ◽

Renewable Energy Technologies ◽

Alternative Energy Sources ◽

Energy Technologies

Environmentalists continuously push for us, as a country, to decrease our fossil fuel usage and transition to a society powered by renewable energy. The money of oil companies and other corporations persuade our government to continue investing in fossil fuels as opposed to renewable energy. There are, however, other reasons which should convince us as a nation to invest in alternative energy sources. Eliminating our dependence on fossil fuels will benefit the nation economically and prepare us for a rapidly changing future. We, as Americans, should increasingly pursue renewable sources of alternative energy not only for the documented environmental reasons but also because investing in renewable energy technologies will provide jobs for Americans, decrease our dependence on other nations, and benefit the health of all Americans while decreasing our dependence on fossil fuels.

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Renewable Energy in Nigeria: Potentials and Challenges

Journal of Southwest Jiaotong University ◽

10.35741/issn.0258-2724.56.3.44 ◽

2021 ◽

Vol 56 (3) ◽

pp. 528-539

Author(s):

Chukwuma Chris Okonkwo ◽

Francis Odikpo Edoziuno ◽

Adeolu Adesoji Adediran ◽

Enoch Mayowa Ibitogbe ◽

Rasheedat Mahamood ◽

...

Keyword(s):

Renewable Energy ◽

Rural Communities ◽

Crude Oil ◽

Alternative Energy ◽

Fossil Fuels ◽

Renewable Energy Sources ◽

Current Status ◽

Energy Sources ◽

Alternative Energy Sources ◽

Energy Technologies

There is a huge renewable potential found in Nigeria which is yet to be explored. The heavy reliance on fossil fuels such as crude oil for its energy production has made it a top contributor to greenhouse gases up to 1.01 % of global emissions. Pertinent efforts have been placed on exploring renewable energy sources given the increased awareness of its sustainability. Furthermore, indicators suggest that crude oil will become a much less significant driver of the energy sector in the coming years. In the light of these issues, this paper presents the potentials that renewable energy has to offer, challenges that could limit its exploitation, and the current status of energy initiatives, including the decade-old renewable energy master plan. Meanwhile, we also discuss the benefits of adopting renewable energy technologies for urban and rural communities. In conclusion, the adverse effect of the exploitation of fossil fuels on the environment, including global warming, glacial meltdown, and acid rain, can be mitigated. Overall, the carbon footprint can be reduced if the potentials are appropriately utilized and converted into an accessible and affordable energy source. Although renewable energy projects have a high initial cost of running over a long life, the cost is small or no compared to conventional sources. The authors recommend the need to explore alternative energy sources that will be environmentally friendly and meet present energy demands.

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Cooling and Heating with Ground Source Energy

International Journal of Energy Optimization and Engineering ◽

10.4018/ijeoe.2012040103 ◽

2012 ◽

Vol 1 (2) ◽

pp. 41-58 ◽

Cited By ~ 1

Author(s):

Abdeen Mustafa Omer

Keyword(s):

Renewable Energy ◽

Alternative Energy ◽

Fossil Fuels ◽

Renewable Energy Sources ◽

Energy Sources ◽

Direct Expansion ◽

Alternative Energy Sources ◽

Operation Conditions ◽

Heating And Cooling ◽

Ground Source

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Impact of Hotel Guests’ Trends to Recycle Food Waste to Obtain Bioenergy

Sustainability ◽

10.3390/su13063094 ◽

2021 ◽

Vol 13 (6) ◽

pp. 3094

Author(s):

Wagih Salama ◽

Essam Abdelsalam

Keyword(s):

Food Waste ◽

Alternative Energy ◽

Waste Recycling ◽

Environmental Preservation ◽

Alternative Energy Sources ◽

Effective Role ◽

Food Waste Recycling ◽

Intentions To Participate ◽

Hotel Managers ◽

The Impact

Hotels face many issues related to food waste management, which is considered a serious environmental and socioeconomic issue in the 21st century. The improper disposal of food waste causes greenhouse gases emissions, consequently badly affecting the environment. This research aims to measure the impact of customer trends in changing the pattern of food waste disposal and recycling into bioenergy relating to hotel purposes and contributing to reducing hotel energy costs in Egypt. Two survey questionnaires were designed for hotel managers and guests, with 25 and 300 forms, respectively. The results indicated that hotel managers are highly willing to recycle food waste to produce bioenergy and hence play an effective role in environmental preservation. Such alternative energy sources are less expensive than conventional ones. This study revealed guests’ intentions to participate in the process of preserving the surrounding environment, as well as their preferences to stay in hotels that are practicing food waste recycling operations. Limitations can be seen in the lack of advertising for such hotels as well the high cost of staying in green and ecological hotels.

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Examining the Role of Disruptive Innovation in Renewable Energy Businesses from a Cross National Perspective

Energies ◽

10.3390/en14154447 ◽

2021 ◽

Vol 14 (15) ◽

pp. 4447

Author(s):

Hokey Min ◽

Yohannes Haile

Keyword(s):

Renewable Energy ◽

Natural Resources ◽

Fossil Fuels ◽

Weather Conditions ◽

Disruptive Innovation ◽

Production Costs ◽

Developed Economies ◽

Sustainable Value ◽

National Perspective ◽

The Impact

With a growing demand for safe, clean, and affordable energy, countries across the world are now seeking to create and rapidly develop renewable energy (RE) businesses. The success of these businesses often hinges on their ability to translate RE into sustainable value for energy consumers and the multiple stakeholders in the energy industry. Such value includes low production costs due to an abundance of natural resources (e.g., wind, water, sunlight), and public health benefits from reduced environmental pollution. Despite the potential for value creation, many RE businesses have struggled to create affordable energy as abundant as that which is produced by traditional fossil fuels. The rationale being that traditional RE sources emanating from natural resources tend to rely on unpredictable weather conditions. Therefore, to help RE businesses deliver sustainable value, we should leverage disruptive innovation that is less dependent on natural resources. This paper is one of the first attempts to assess the impact of disruptive innovation on RE business performances based on the survey data obtained from multiple countries representing both emerging and developed economies.

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Power Generation for the Near Future

Volume 5: Energy Systems Analysis, Thermodynamics and Sustainability; NanoEngineering for Energy; Engineering to Address Climate Change, Parts A and B ◽

10.1115/imece2010-37714 ◽

2010 ◽

Cited By ~ 1

Author(s):

Kau-Fui Vincent Wong ◽

Guillermo Amador

Keyword(s):

Greenhouse Gases ◽

Energy Production ◽

Alternative Energy ◽

Nuclear Power ◽

Fossil Fuels ◽

Energy Sources ◽

Traditional Methods ◽

Alternative Energy Sources ◽

The Us ◽

Near Future

As society continues advancing into the future, more energy is required to supply the increasing population and energy demands. Unfortunately, traditional forms of energy production through the burning of carbon-based fuels are dumping harmful pollutants into the environment, resulting in detrimental, and possibly irreversible, effects on our planet. The burning of coal and fossil fuels provides energy at the least monetary cost for countries like the US, but the price being paid through their negative impact of our atmosphere is difficult to quantify. A rapid shift to clean, alternative energy sources is critical in order to reduce the amount of greenhouse gas emissions. For alternative energy sources to replace traditional energy sources that produce greenhouse gases, they must be capable of providing energy at equal or greater rates and efficiencies, while still functioning at competitive prices. The main factors hindering the pursuit of alternative sources are their high initial costs and, for some, intermittency. The creation of electrical energy from natural sources like wind, water, and solar is very desirable since it produces no greenhouse gases and makes use of renewable sources—unlike fossil fuels. However, the planning and technology required to tap into these sources and transfer energy at the rate and consistency needed to supply our society comes at a higher price than traditional methods. These high costs are a result of the large-scale implementation of the state-of-the-art technologies behind the devices required for energy cultivation and delivery from these unorthodox sources. On the other hand, as fossil fuel sources become scarcer, the rising fuel costs drive overall costs up and make traditional methods less cost effective. The growing scarcity of fossil fuels and resulting pollutants stimulate the necessity to transition away from traditional energy production methods. Currently, the most common alternative energy technologies are solar photovoltaics (PVs), concentrated solar power (CSP), wind, hydroelectric, geothermal, tidal, wave, and nuclear. Because of government intervention in countries like the US and the absence of the need to restructure the electricity transmission system (due to the similarity in geographical requirements and consistency in power outputs for nuclear and traditional plants), nuclear energy is the most cost competitive energy technology that does not produce greenhouse gases. Through the proper use of nuclear fission electricity at high efficiencies could be produced without polluting our atmosphere. However, the initial capital required to erect nuclear plants dictates a higher cost over traditional methods. Therefore, the government is providing help with the high initial costs through loan guarantees, in order to stimulate the growth of low-emission energy production. This paper analyzes the proposal for the use of nuclear power as an intermediate step before an eventual transition to greater dependence on energy from wind, water, and solar (WWS) sources. Complete dependence on WWS cannot be achieved in the near future, within 20 years, because of the unavoidable variability of these sources and the required overhaul of the electricity transmission system. Therefore, we look to nuclear power in the time being to help provide predictable power as a means to reduce carbon emissions, while the other technologies are refined and gradually implemented in order to meet energy demand on a consistent basis.

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