scholarly journals Oil Prices, Fossil-Fuel Stocks and Alternative Energy Stocks

2015 ◽  
Vol 7 (7) ◽  
Author(s):  
N. Alper Gormus ◽  
Ugur Soytas ◽  
J. David Diltz
Keyword(s):  
Alternative Energy ◽  
Fossil Fuel ◽  
Oil Prices

Energetic comparison of some stump-removing methods

2014 ◽  
Vol 10 (1) ◽  
pp. 35-51
Author(s):  
I. Czupy
Keyword(s):  
Alternative Energy ◽  
Fossil Fuel ◽  
Alternating Current ◽  
Above Ground Biomass ◽  
Alternative Energy Sources ◽  
Wide Domain ◽  
Fuel Substitution ◽  
Unused Resource ◽  
Root Connection ◽  
Different Soils

Concerns about climate change and fossil fuel shortages are encouraging interest in stumps, as alternative energy sources. Stumps are an almost unused resource in the context of bio fuels. Stump harvesting signifies an intensification of forest management compared with conventional stem-only or above-ground biomass-only harvesting. There are many benefits of stump harvesting. These include: the production of wood fuel, fossil fuel substitution, and improved soil preparation.Removing tree trunks in Hungary has been going on according to the principle of stump extraction, which means stumps are removed by grabbing technology. Experiments have been carried out to reduce the extraction force. In the Great Hungarian Lowland, where large areas require the operation implementation, stump extraction is done by special, hydraulic driven baggers equipped with a special bucket. During operation of the equipment, we carried out measurements of the extraction force and the time requirement. The experiments are designed to carry out the measurements with different soils and different tree species. According to our proposal the suitable force and torque required to remove stumps can be significantly reduced if before the lifting the soil — root connection is loosened. One of the possible ways to implement this task is the use of vibration. Since relatively great vibration power and wide domain of frequency are necessary, therefore we prepared the loosening machinery elements of alternating-current hydraulics system. Based on constructions variants we created a tractor-mounted experimental alternating-current hydraulic stump-loosening machine. It was designed with the ability to produce horizontal vibration in order to loosen stumps.

RENEWABLE ENERGY INTEGRATION FOR HOT WATER SUPPLY AND HEATING OF BUILDINGS

2021 ◽  
pp. 3-12
Author(s):  
Yu. Selikhov ◽  
K. Gorbunov ◽  
V. Stasov
Keyword(s):  
Solar Energy ◽  
Heat Production ◽  
Heat Supply ◽  
Alternative Energy ◽  
Fossil Fuel ◽  
Heat Pumps ◽  
Climatic Conditions ◽  
Economic Feasibility ◽  
Hot Water ◽  
The Cost

Solar energy is widely used in solar systems, where economy and ecology are combined. Namely, this represents an important moment in the era of depletion of energy resources. The use of solar energy is a promising economical item for all countries of the world, meeting their interests also in terms of energy independence, thanks to which it is confidently gaining a stable position in the global energy sector. The cost of heat obtained through the use of solar installations largely depends on the radiation and climatic conditions of the area where the solar installation is used. The climatic conditions of our country, especially the south, make it possible to use the energy of the Sun to cover a significant part of the need for heat. A decrease in the reserves of fossil fuel and its rise in price have led to the development of optimal technical solutions, efficiency and economic feasibility of using solar installations. And today this is no longer an idle curiosity, but a conscious desire of homeowners to save not only their financial budget, but also health, which is possible only with the use of alternative energy sources, such as: double-circuit solar installations, geothermal heat pumps (HP), wind power generators. The problem is especially acute in the heat supply of housing and communal services (HCS), where the cost of fuel for heat production is several times higher than the cost of electricity. The main disadvantages of centralized heat supply sources are low energy, economic and environmental efficiency. And high transport tariffs for the delivery of energy carriers and frequent accidents on heating mains exacerbate the negative factors inherent in traditional district heating. One of the most effective energy-saving methods that make it possible to save fossil fuel, reduce environmental pollution, and meet the needs of consumers in process heat is the use of heat pump technologies for heat production.

scholarly journals Myth v. Fact

2011 ◽  
Vol 133 (01) ◽  
pp. 24-29 ◽  
Author(s):  
John Reilly ◽  
Allison Crimmins
Keyword(s):  
Energy Demand ◽  
Alternative Energy ◽  
Nuclear Energy ◽  
Fossil Fuels ◽  
Fossil Fuel ◽  
Primary Energy ◽  
Electricity Production ◽  
Energy Prices ◽  
Primary Energy Demand ◽  
Business As Usual

This article predicts future global energy demand under a business-as-usual scenario. According to the MIT projections, conventional technology supported by fossil fuels will continue to dominate under a business-as-usual scenario. In fact, in the absence of climate policies that would impact energy prices, fossil fuels will supply nearly 80% of global primary energy demand in 2100. Alternative energy technologies will expand rapidly. Non-fossil fuel use will grow from 13% to 20% by 2100, with renewable electricity production expanding nearly tenfold and nuclear energy increasing by a factor of 8.5. However, those sources currently provide such a small share of the world's energy that even rapid growth is not enough to significantly displace fossil fuels. In spite of the growth in renewables, the projections indicate that coal will remain among the least expensive fuel sources. Non-fossil fuel alternatives, such as renewable energy and nuclear energy, will be between 40% and 80% more expensive than coal.

scholarly journals Widely used catalysts in biodiesel production: a review

RSC Advances ◽  
2020 ◽  
Vol 10 (68) ◽  
pp. 41625-41679
Author(s):  
Bishwajit Changmai ◽  
Chhangte Vanlalveni ◽  
Avinash Prabhakar Ingle ◽  
Rahul Bhagat ◽  
Lalthazuala Rokhum
Keyword(s):  
Energy Demand ◽  
Alternative Energy ◽  
Fossil Fuels ◽  
Fossil Fuel ◽  
Environmental Problems ◽  
Biodiesel Production

An ever-increasing energy demand and environmental problems associated with exhaustible fossil fuels have led to the search for an alternative energy. In this context, biodiesel has attracted attention worldwide as an alternative to fossil fuel.

PERFORMA GENERATOR HHO DALAM SISTEM BI-FUEL PADA SEPEDA MOTOR SEBAGAI BAHAN BAKAR ALTERNATIF

ROTOR ◽  
2017 ◽  
Vol 10 (1) ◽  
pp. 7
Author(s):  
Ika Kusuma Nugraheni ◽  
Anggun Angkasa ◽  
Abdul Rahman Rifa’i
Keyword(s):  
Performance Analysis ◽  
Fuel Consumption ◽  
Alternative Energy ◽  
Fossil Fuels ◽  
Fossil Fuel ◽  
Sea Water ◽  
The Other ◽  
Engine Oil ◽  
Other Hand ◽  
Land Water

The increasing of vehicle uses will make the increasing in fuels consumption. In the other hand, the reserves of fossil fuels as a fuel in vehicles are always decreasing. In order to anticipate the lack of fossil fuels, there is some alternatives energy that has to substitute the fossil fuels. One of the alternative energy is HHO Gas. HHO gas is a gas that was produced by the electrolysis of water. Water as an abundant material in earth can be an alternative energy that replace or substitute fossil fuel. In this research, HHO gas will be used as a supplement in fuels. So the vehicles use two fuels (bi-fuel. )The aim of this research is to analyze the performance of uses HHO gas in vehicles. The HHO gas will be produced by different water, such as aquadest, land water, sea water. The performance analysis was focused in the fuel consumption and the efficiency of thermal engine oil. The analysis result shows that the addicted HHO gas can make the efficiency of fuel consumption better. The highest efficiency fuel consumption is in the fuel with HHO gas from aquadest (19.95%). But the best efficiency in thermal engine oil is in HHO gas from sea water (0.84 oC). Keywords: HHO, performance, engine, bifuel

Global Potential of Biomass: Heat, Electricity and Liquid and Gaseous Fuels Markets

2006 ◽  
Author(s):  
Jude Iyinbor ◽  
Ogunrinde Abayomi
Keyword(s):  
Environmental Effects ◽  
Alternative Energy ◽  
Fossil Fuels ◽  
Fossil Fuel ◽  
Energy Utilization ◽  
Energy Sources ◽  
Gaseous Fuels ◽  
Alternative Energy Sources ◽  
Oil Sector ◽  
Market Factors

Negative environmental effects, diminishing fossil fuel sources and soaring oil prices are some of the pertinent factors militating against the long term usage of fossil fuels. These make the introduction of alternative energy sources an integral part of our global energy plan. On the contrary, established fossil fuel infrastructures, flexibility of fossil fuels and economic gains from the oil sector are a few reasons why there is a global attitude of ‘drill the last drop before developing sustainable alternatives’. There are various energy sources that have little environmental effects and are sustainable (e.g. wind, geothermal, solar, hydro, biomass, e.t.c.), but the potentials they do have when it comes to the major energy utilization forms (heat, electricity and liquid and gaseous fuels) will be a key determinant of how alternative energy sources will be able to match the seemingly invincible presence of fossil fuels. The biomass option is examined in this report considering its potential with respect to heat, electricity and liquid and gaseous fuels market. Factors that may favour or hinder its potential and suitable solutions on how the potential can be increased are also discussed.

Oil prices and the stock prices of alternative energy companies

2008 ◽  
Vol 30 (3) ◽  
pp. 998-1010 ◽  
Author(s):  
Irene Henriques ◽  
Perry Sadorsky
Keyword(s):  
Stock Prices ◽  
Alternative Energy ◽  
Oil Prices ◽  
Energy Companies

scholarly journals Utilization of fish oil for biodiesel production

2010 ◽  
Vol 5 (1) ◽  
pp. 15
Author(s):  
Tri Nugroho Widianto ◽  
Bagus Sediadi Bandol Utomo
Keyword(s):  
Air Pollution ◽  
Fish Oil ◽  
Reaction Kinetics ◽  
Alternative Energy ◽  
Fossil Fuel ◽  
Fish Meal ◽  
Industrial Wastes ◽  
Biodiesel Production ◽  
Alkaline Catalyst ◽  
Fossil Fuel Consumption

Recenty fossil fuel consumption gradually increases, resulting in decreases of its naturalresource and causing environmental problems such as air pollution and global warming.Attempts to overcome the problems have been made to create on alternative energy such asbiodiesel from jatropha, microalgae and fish oil. Biodiesel production, as matter of fact, can beconducted using industrial wastes of fish meal, fish fillets and fish canning by transesterification offish oil using methanol and alkaline catalyst. Transesterification reaction kinetics must beconsidered for an efficient process. Transesterification rate constant very much depends on thetemperature and the quantity of the catalyst

scholarly journals PERSEPSI MASYARAKAT PESISIR TERHADAP PENGGUNAAN ENERGI ALTERNATIF UNTUK MELAUT

2008 ◽  
Vol 3 (2) ◽  
pp. 233
Author(s):  
Mira Mira ◽  
Riza Zulkarnen
Keyword(s):  
Diesel Fuel ◽  
Alternative Energy ◽  
Fossil Fuel ◽  
Community Perception ◽  
Distribution Factor ◽  
Coastal Community ◽  
Factors Affecting ◽  
Factors Influencing ◽  
Low Correlation

Tujuan dari tulisan ini difokuskan untuk mengkaji persepsi masyarakat pesisir (nelayan) terhadap penggunaan energi alternatif untuk melaut, selain itu juga akan dianalisis faktor-faktor yang mempengaruhi nelayan untuk mengganti solar dengan biodiesel dalam mengatasi kelangkaan BBM. Lokasi penelitian yang dipilih adalah Cilacap dan penelitian dilakukan pada tahun 2006. Dari hasil pengolahan data, sebesar 72,50 persen nelayan mempunyai persepsi yang tinggi (positif) terhadap keberadaan biodiesel sebagai energi alternatif dalam mengatasi kelangkaan BBM. Persepsi nelayan yang rendah (negatif) akan menghambat pelaksanaan program desa nelayan mandiri energi, sedangkan persepsi yang tinggi (positif) merupakan dukungan dalam mencapai tujuan program desa nelayan mandiri energi. Terdapat 27,50% nelayan yang masih ragu-ragu tentang keberadaan biodiesel. Menurut nelayan keberadaan biodiesel belum tentu harganya lebih murah dibanding solar. Ada juga responden yang meragukan kualitas biodisel. Ada tiga faktor yang sangat mempengarugi responden dalam proses keputusan pembelian biodiesel harga, kualitas (keamanan), dan distribusi. Pada uji signifikansi 0,05 hasil analisis Spearman memperlihatkan adanya hubungan yang sangat tinggi (derajat asosiasi tinggi) antara harga dengan keputusan membeli biodisel, yaitu sebesar 1 (nilai koefisien korelasi), artinya semakin murah harga biodisel maka semakin besar keinginan responden untuk mengganti solar dengan biodiesel. Faktor distribusi menunjukkan adanya korelasi yang rendah, yaitu sebesar -0, 293 pada uji signifikansi 0,05.  Tittle: Coastal Community Perception to Use Alternative Energi for FishingThis paper was focused on analyzing the coastal community perception on the use of alternative energy for fishing, as well as the factors influencing the fisher to substitute diesel fuel by biodiesel to overcome the high cost problem of fossil fuel. Research was conducted in Cilacap in 2006. The results showed that 72,50% of fishers indicated a high perception (positive) to biodiesel as alternative energy while 27,50% of fisher were uncertained to the use of biodiesel. According to fishers biodesel price was not lower then the solar price.Some fishers were also doubted to the quality of biodesel. There were 3 factors affecting responden to decide on the use of biodiesel : price, quality and distribution. The decision was highly affected by the price (coefficient value=1) based on Spearman analysis. It means, the cheaper the price, the more probability of respondents to use the biodiesel will be. Distribution factor shows a low correlation with value of = -0,293 at level significancy of 0.05. 

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