Subjects -> ENERGY (Total: 414 journals)
    - ELECTRICAL ENERGY (12 journals)
    - ENERGY (252 journals)
    - ENERGY: GENERAL (7 journals)
    - NUCLEAR ENERGY (40 journals)
    - PETROLEUM AND GAS (58 journals)
    - RENEWABLE ENERGY (45 journals)

ENERGY (252 journals)                  1 2 | Last

Showing 1 - 200 of 406 Journals sorted by number of followers
IET Power Electronics     Open Access   (Followers: 76)
Energy Policy     Partially Free   (Followers: 73)
Canadian Journal of Remote Sensing     Full-text available via subscription   (Followers: 50)
IEEE Transactions on Power Systems     Hybrid Journal   (Followers: 45)
Energy     Partially Free   (Followers: 40)
IEEE Power and Energy     Full-text available via subscription   (Followers: 36)
Journal of Physical Chemistry C     Hybrid Journal   (Followers: 36)
Solar Energy Materials and Solar Cells     Hybrid Journal   (Followers: 29)
Advances in Natural Sciences : Nanoscience and Nanotechnology     Open Access   (Followers: 28)
Energy & Fuels     Hybrid Journal   (Followers: 27)
Nature Energy     Hybrid Journal   (Followers: 27)
Applied Energy     Partially Free   (Followers: 26)
Energy & Environment     Hybrid Journal   (Followers: 25)
International Journal of Alternative Propulsion     Hybrid Journal   (Followers: 23)
Energy and Power Engineering     Open Access   (Followers: 23)
International Journal of Turbomachinery, Propulsion and Power     Open Access   (Followers: 23)
Advances in High Energy Physics     Open Access   (Followers: 23)
Applied Solar Energy     Hybrid Journal   (Followers: 20)
Water International     Hybrid Journal   (Followers: 19)
Energy Materials : Materials Science and Engineering for Energy Systems     Hybrid Journal   (Followers: 19)
Solar Energy     Hybrid Journal   (Followers: 19)
International Journal of Hydrogen Energy     Partially Free   (Followers: 19)
Journal of Power Electronics & Power Systems     Full-text available via subscription   (Followers: 19)
Energy and Power     Open Access   (Followers: 18)
Journal of Solar Energy Engineering     Full-text available via subscription   (Followers: 18)
Canadian Water Resources Journal     Hybrid Journal   (Followers: 18)
Advances in Energy and Power     Open Access   (Followers: 16)
Nuclear Engineering and Design     Hybrid Journal   (Followers: 16)
IEEE Transactions on Energy Conversion     Hybrid Journal   (Followers: 16)
Progress in Energy and Combustion Science     Hybrid Journal   (Followers: 15)
Energy Conversion and Management     Hybrid Journal   (Followers: 15)
International Journal of Thermodynamics     Open Access   (Followers: 15)
Energy, Sustainability and Society     Open Access   (Followers: 15)
Energy Journal The     Hybrid Journal   (Followers: 14)
Energy and Environment Research     Open Access   (Followers: 13)
Surface Science Reports     Full-text available via subscription   (Followers: 13)
Economics and Policy of Energy and the Environment     Full-text available via subscription   (Followers: 13)
Waste Management     Hybrid Journal   (Followers: 13)
International Journal of Sustainable Energy     Hybrid Journal   (Followers: 12)
Energy and Buildings     Hybrid Journal   (Followers: 12)
Energy Systems     Hybrid Journal   (Followers: 11)
Energy Research & Social Science     Full-text available via subscription   (Followers: 11)
Oil and Gas Journal     Full-text available via subscription   (Followers: 11)
Advances in Building Energy Research     Hybrid Journal   (Followers: 11)
Journal of Solar Energy     Open Access   (Followers: 11)
Annual Review of Resource Economics     Full-text available via subscription   (Followers: 11)
Biofuels     Hybrid Journal   (Followers: 11)
Energy Science and Technology     Open Access   (Followers: 10)
Innovations : Technology, Governance, Globalization     Hybrid Journal   (Followers: 10)
Archives of Thermodynamics     Open Access   (Followers: 10)
IEEE Transactions on Nuclear Science     Hybrid Journal   (Followers: 10)
Biomass Conversion and Biorefinery     Partially Free   (Followers: 10)
Journal of Ocean and Climate     Open Access   (Followers: 9)
Energy Efficiency     Hybrid Journal   (Followers: 9)
Journal of Modern Power Systems and Clean Energy     Open Access   (Followers: 9)
International Journal of Green Energy     Hybrid Journal   (Followers: 8)
Energy Strategy Reviews     Open Access   (Followers: 8)
International Journal of Electric and Hybrid Vehicles     Hybrid Journal   (Followers: 8)
International Journal of Energy Research     Hybrid Journal   (Followers: 8)
International Journal of Global Energy Issues     Hybrid Journal   (Followers: 8)
Batteries     Open Access   (Followers: 8)
Wiley Interdisciplinary Reviews : Energy and Environment     Hybrid Journal   (Followers: 8)
Journal of Renewable Energy     Open Access   (Followers: 8)
International Journal of Energy and Power     Open Access   (Followers: 8)
CERN courier. International journal of high energy physics     Free   (Followers: 8)
Environmental Progress & Sustainable Energy     Hybrid Journal   (Followers: 7)
Applied Nanoscience     Open Access   (Followers: 7)
Energy and Environment Focus     Free   (Followers: 7)
American Journal of Energy Research     Open Access   (Followers: 7)
Annals of Nuclear Energy     Hybrid Journal   (Followers: 7)
Fuel and Energy Abstracts     Full-text available via subscription   (Followers: 7)
Structural Control and Health Monitoring     Hybrid Journal   (Followers: 6)
Energy Science & Engineering     Open Access   (Followers: 6)
Energy Prices and Taxes     Full-text available via subscription   (Followers: 6)
Materials for Renewable and Sustainable Energy     Open Access   (Followers: 6)
Energy Reports     Open Access   (Followers: 5)
Joule     Hybrid Journal   (Followers: 5)
Computational Water, Energy, and Environmental Engineering     Open Access   (Followers: 5)
Energy Technology     Partially Free   (Followers: 5)
Journal of Building Performance Simulation     Hybrid Journal   (Followers: 5)
Journal of Energy & Natural Resources Law     Hybrid Journal   (Followers: 5)
Frontiers in Energy Research     Open Access   (Followers: 5)
Batteries & Supercaps     Hybrid Journal   (Followers: 5)
International Journal of Sustainable Energy Planning and Management     Open Access   (Followers: 5)
Atomic Energy     Hybrid Journal   (Followers: 5)
Energy and Environmental Engineering     Open Access   (Followers: 5)
Geothermal Energy     Open Access   (Followers: 5)
Energy Studies Review     Open Access   (Followers: 5)
Journal of Energy Technologies and Policy     Open Access   (Followers: 5)
Energy Storage Materials     Full-text available via subscription   (Followers: 5)
Carbon Management     Hybrid Journal   (Followers: 5)
Journal of Nano Energy and Power Research     Full-text available via subscription   (Followers: 4)
Journal of Energy, Environment & Carbon Credits     Full-text available via subscription   (Followers: 4)
American Journal of Energy and Environment     Open Access   (Followers: 4)
International Journal of Applied Power Engineering     Open Access   (Followers: 4)
Journal of International Energy Policy     Open Access   (Followers: 4)
International Journal of Nuclear Energy Science and Technology     Hybrid Journal   (Followers: 4)
Journal of Photochemistry and Photobiology B: Biology     Hybrid Journal   (Followers: 4)
ACS Energy Letters     Hybrid Journal   (Followers: 4)
International Journal of Sustainable Engineering     Hybrid Journal   (Followers: 4)
Annual Reports on NMR Spectroscopy     Full-text available via subscription   (Followers: 4)
Development of Energy Science     Open Access   (Followers: 4)
ACS Applied Energy Materials     Hybrid Journal   (Followers: 4)
Journal of Energy Storage     Full-text available via subscription   (Followers: 4)
Foundations and Trends® in Renewable Energy     Full-text available via subscription   (Followers: 4)
Strategic Planning for Energy and the Environment     Hybrid Journal   (Followers: 4)
Sustainable Energy, Grids and Networks     Hybrid Journal   (Followers: 4)
Frontiers in Energy     Hybrid Journal   (Followers: 4)
Protection and Control of Modern Power Systems     Open Access   (Followers: 3)
Functional Materials Letters     Hybrid Journal   (Followers: 3)
Power Technology and Engineering     Hybrid Journal   (Followers: 3)
Dams and Reservoirs     Hybrid Journal   (Followers: 3)
Journal of Energy, Mechanical, Material and Manufacturing Engineering     Open Access   (Followers: 3)
Journal of Energy Chemistry     Full-text available via subscription   (Followers: 3)
Journal of Photochemistry and Photobiology C: Photochemistry Reviews     Full-text available via subscription   (Followers: 3)
Energy and Emission Control Technologies     Open Access   (Followers: 3)
International Journal of Energy and Environmental Engineering     Open Access   (Followers: 3)
Wind Energy     Hybrid Journal   (Followers: 3)
International Journal of Energy and Statistics     Hybrid Journal   (Followers: 3)
Distributed Generation & Alternative Energy Journal     Hybrid Journal   (Followers: 3)
Science and Technology of Nuclear Installations     Open Access   (Followers: 3)
Journal of Photochemistry and Photobiology A: Chemistry     Hybrid Journal   (Followers: 3)
Journal of Power and Energy Engineering     Open Access   (Followers: 2)
Sustainable Energy     Open Access   (Followers: 2)
Clean Energy     Open Access   (Followers: 2)
Energy Technology & Policy     Open Access   (Followers: 2)
Green Energy & Environment     Open Access   (Followers: 2)
Materials Today Energy     Hybrid Journal   (Followers: 2)
Energy Storage     Hybrid Journal   (Followers: 2)
Journal of Technology Innovations in Renewable Energy     Hybrid Journal   (Followers: 2)
Journal of Ocean Engineering and Marine Energy     Hybrid Journal   (Followers: 2)
International Journal of Smart Grid and Green Communications     Hybrid Journal   (Followers: 2)
IET Smart Grid     Open Access   (Followers: 2)
Carbon Resources Conversion     Open Access   (Followers: 2)
Advanced Materials Technologies     Hybrid Journal   (Followers: 2)
Journal of Energy     Open Access   (Followers: 2)
International Journal of Nuclear Knowledge Management     Hybrid Journal   (Followers: 2)
Proceedings of the Institution of Civil Engineers - Energy     Hybrid Journal   (Followers: 2)
EPJ Photovoltaics     Open Access   (Followers: 2)
International Journal of Clean Coal and Energy     Open Access   (Followers: 2)
Progress in Nuclear Energy     Hybrid Journal   (Followers: 2)
Journal of Fusion Energy     Hybrid Journal   (Followers: 2)
Gcb Bioenergy     Open Access   (Followers: 2)
Science and Technology for Energy Transition     Open Access   (Followers: 2)
Journal of Energy in Southern Africa     Open Access   (Followers: 2)
Journal of Alternate Energy Sources & Technologies     Full-text available via subscription   (Followers: 2)
Journal of Nuclear Energy Science & Power Generation Technology     Hybrid Journal   (Followers: 2)
Sustainable Energy & Fuels     Hybrid Journal   (Followers: 1)
International Journal of Energy and Smart Grid     Open Access   (Followers: 1)
International Journal of Nuclear Hydrogen Production and Applications     Hybrid Journal   (Followers: 1)
Clean Technologies     Open Access   (Followers: 1)
Energy Conversion and Management : X     Open Access   (Followers: 1)
IET Energy Systems Integration     Open Access   (Followers: 1)
Radioprotection     Hybrid Journal   (Followers: 1)
Electricity Journal     Hybrid Journal   (Followers: 1)
International Journal of Nuclear Desalination     Hybrid Journal   (Followers: 1)
Michigan Journal of Sustainability     Open Access   (Followers: 1)
Clefs CEA     Full-text available via subscription   (Followers: 1)
Journal of Computational Multiphase Flows     Open Access   (Followers: 1)
International Journal of Power and Energy Conversion     Hybrid Journal   (Followers: 1)
Technology Audit and Production Reserves     Open Access   (Followers: 1)
International Journal of Coal Science & Technology     Open Access   (Followers: 1)
Nigerian Journal of Technological Research     Full-text available via subscription   (Followers: 1)
Open Journal of Energy Efficiency     Open Access   (Followers: 1)
Asian Bulletin of Energy Economics and Technology     Open Access   (Followers: 1)
Biofuel Research Journal     Open Access   (Followers: 1)
International Journal of Energy and Water Resources     Hybrid Journal  
BioPhysical Economics and Resource Quality     Hybrid Journal  
Geomechanics and Geophysics for Geo-Energy and Geo-Resources     Hybrid Journal  
Energy, Ecology and Environment     Hybrid Journal  
Technology and Economics of Smart Grids and Sustainable Energy     Hybrid Journal  
BMC Energy     Open Access  
Journal of Energy and Environment Technology of Graduate School Siam Technology College     Open Access  
Global Energy Interconnection     Open Access  
Journal of Energy Systems     Open Access  
International Journal of Energy & Engineering Sciences     Open Access  
Turkish Journal of Energy Policy     Open Access  
Energy Informatics     Open Access  
Global Challenges     Open Access  
High Voltage     Open Access  
Geomechanics for Energy and the Environment     Full-text available via subscription  
ENERGETIKA. Proceedings of CIS higher education institutions and power engineering associations     Open Access  
Sustainable Energy Technologies and Assessments     Full-text available via subscription  
Journal of China Coal Society     Open Access  
Facta Universitatis, Series : Electronics and Energetics     Open Access  
Universal Journal of Applied Science     Open Access  
Ingeniería Energética     Open Access  
E3S Web of Conferences     Open Access  
Washington and Lee Journal of Energy, Climate, and the Environment     Open Access  
Journal of Sustainable Bioenergy Systems     Full-text available via subscription  
International Journal of Ambient Energy     Hybrid Journal  
CT&F - Ciencia, Tecnología y Futuro     Open Access  
Multequina     Open Access  
Natural Resources     Open Access  
South Pacific Journal of Natural and Applied Sciences     Hybrid Journal  
Chain Reaction     Full-text available via subscription  
Wind Engineering     Hybrid Journal  
Nuclear Data Sheets     Full-text available via subscription  
Global Energy Law and Sustainability     Hybrid Journal  
International Journal of Nuclear Governance, Economy and Ecology     Hybrid Journal  

        1 2 | Last

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Journal of Alternate Energy Sources & Technologies
Number of Followers: 2  
 
  Full-text available via subscription Subscription journal
ISSN (Print) 2321-518X
Published by STM Journals Homepage  [66 journals]
  • Endogenous and Exogenous Enzyme Effects on Different Breeding Clones of
           Sweetpotato (Ipomoea batatas Lam.) Roots Starch in Ethanol Production

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      Authors: Boniface J. Tiimob, Joshua Madison, Albert E. Russell, Desmond G. Mortley
      Abstract: The research described herein compares ethanol yield from the conversion of starch in sweetpotato storage roots via endogenous enzyme hydrolysis to that of exogenous enzyme hydrolysis (diastatic barley malt).  White-fleshed roots of sweetpotato (Ipomoea batatas Lam) breeding clones; TU090R0005, TIB4004, TU090020, TU090013, BM8342197-05, BM854219905 and TIB4085 were processed for distillation to determine ethanol concentration.   HPLC analysis was used to determine ethanol and residual sugar concentrations and 1H NMR analysis was used to confirm the identity of the distillate.  HPLC analysis of the crude fermented slurry showed glucose at retention time of 9.98 min, ethanol at 21.50 min and a trace amount of residual glucose in TU090013.  Initial glucose concentration (HPLC) ranged from 9.1±0.49 mg/mL to 12.3±0.49 mg/mL and 0.79±0.49 mg/mL to 3.46±0.49 mg/mL for exogenous and endogenous enzyme hydrolysis respectively.  The volume fraction of ethanol as measured by HPLC ranged from 3.38 ± 0.06 %  to 4.13 ± 0.06 % ; and 0.98 ± 0.06 %  to 1.60 ± 0.06 % ; whereas the volume fraction by distillation, when compared to the HPLC data, ranged from 3.21 ± 0.14 %  to 4.22 ± 0.14 %; and 0.86  ± 0.14 %  to 1.64 ± 0.14 %.  These results suggest that exogenous enzymes are needed for commercial production of ethanol.  T-test (p < 0.05) comparing the amount of ethanol recovered after distillation and the concentration of ethanol measured by HPLC found no significant difference between the two methods for determining ethanol concentration.
      PubDate: 2013-08-09
      Issue No: Vol. 4 (2013)
       
  • Non-linear Integral Equations Ideal Solar Cells Analysis with One and Two
           Intermediate Bands

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      Authors: E. G. Ladopoulos
      Abstract: An innovative and groundbreaking theory is proposed by using intermediate bands within the energy gap of the semiconductor in order to increase the efficiency of solar cells. Consequently, photons with energy less than the band gap may contribute to the output device by using the intermediate band or bands, in order to jump to the conduction band. This problem is reduced to the solution of non-linear integral equations and for their evaluation a special numerical method is proposed. Generally, in solar cells low energy photons cannot excite electrons to the conduction band and then to the external circuit. On the other hand, intermediate bands get advantage of the lower energy photons by allowing the electrons to be promoted to levels in the usually forbidden energy gap. Thus, through the above multi-step approach, then the efficiency of the solar cell is increasing. In the present research it will be shown that the maximum efficiency of an ideal solar cell containing one and two intermediate bands will be 63% and 75%, respectively.  
      PubDate: 2013-08-09
      Issue No: Vol. 4 (2013)
       
  • Potentials of Hybrid System in Powering Off-grid Macro Base Transmitter
           Station Site

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      Authors: Ani Vincent Anayochukwu, Nzeako Anthony Ndubueze
      Abstract: This paper explores the possibility of hybridizing the diesel generator source system with renewable energy sources and demonstrate the potential of renewable energies to replace (partially) diesel as a source of power for mobile base station sites. The concept of hybridizing the diesel generator is to reduce both the operating cost and the quantity of different air pollutants. The patterns of load consumption by mobile base station are studied and suitably modeled for optimization using Hybrid Optimization Model for Electric Renewables (HOMER) software. The proposed Hybrid (Solar and Hydro) + DG system was simulated using the model which results in four different topologies. The solution with the highest optimization value is considered to be the best energy option (solution) for the Base Station Site. From the simulation results, the PV/Hydro-Diesel system solution has the highest optimization value. It saves $15,961,777 and 70.553 tonnes of CO2 when compared with diesel only.
      PubDate: 2013-08-09
      Issue No: Vol. 4 (2013)
       
  • A Comparative Study of the Performance and Emission Characteristics of a
           Diesel Engine Fuelled with Soybean Oil and 20% Soybean Oil Blend with
           Diesel Oil and Neat Diesel Oil

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      Authors: S. Ghosh, D. Dutta
      Abstract: Compliance with the limited oil reserves on the earth and governmental regulations about the environment to meet emission standards leads to the quest for fuels which are eco-friendly and safe for the human beings. It is now well established that lower blends of biodiesel and diesel works well in the existing engines without any modifications due to the similarity of the bio fuels to the diesel fuel. Experimental investigation was carried out in a single cylinder direct injection diesel engine fuelled with diesel, soybean oil methyl ester (SOME) and 20SOME (80% diesel+20% Soybean oil methyl ester). The performance such as brake thermal efficiency and exhaust gas temperature (EGT) at different brake power and exhaust emission characteristics such as unburned hydrocarbon (UBHC), Carbon monoxide (CO), oxides of Nitrogen (NOx), and smoke density at different brake power and compared with diesel fuel. The investigation revealed that the engine performance under biodiesel blend 20SOME was similar to that of pure diesel fuel with nearly the same brake thermal efficiency and the maximum emission of smoke for 20SOME blend was same as for diesel. The carbon monoxide and hydrocarbon emissions decreased significantly compared to neat diesel fuel.
      PubDate: 2013-03-21
      Issue No: Vol. 4 (2013)
       
  • Implementation of Solar Cells and Natural Gas Fuel Cells as a Green Hybrid
           Power Plant

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      Authors: Abolfazl Halvaei Niasar, Robert Vartanian, Hassan Moghbelli
      Abstract: Global warming is a major concern in today’s world. To address this issue, most countries are working on the usage of renewable energy sources like solar energy, clean fuels (hydrogen) and trying to increase the efficiency of fossil fuel plants. This paper discusses the hybridization of the renewable solar energy source with highly efficient and clean usage of natural gas fossil fuel. The hybrid power plant used in this project uses renewable energy sources as a reliable power supply with stand-alone and grid-connected capability which can increase network power quality. Simulation results have been discussed to show the contribution of natural gas fuel cells, photovoltaic power plants, and electric energy storage in supplying a constant load.
      PubDate: 2013-03-21
      Issue No: Vol. 4 (2013)
       
  • Determination of Heat Transfer Coefficient in Solar Collector Tube under
           Simulated Operating Conditions

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      Authors: Vishwash K. Deshpande, Sampatrao D. Manjare
      Abstract: In this paper, heat transfer coefficient, in solar collector tube under scaling conditions has been experimentally determined using a specifically fabricated test apparatus.  The effect of various variables such as  scale thickness, flow conditions and tube wall temperatures on heat transfer coefficients have been investigated. The experimental results reveals that the scale thickens has a dominating effect on heat transfer coefficient
      PubDate: 2013-03-21
      Issue No: Vol. 4 (2013)
       
  • Experimental Study of Burn Rate and Mechanism of Burning of Karanja Oil
           Biodiesel and Diesel by Using a Porous Sphere

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      Authors: T. Dhilip, R. Nallappan, T. Vijayakanth
      Abstract:    Biodiesel is a renewable energy resource, which has the potential to reduce greenhouse emissions and to facilitate energy sustainability. It can provide an alternative to petroleum-based diesel. The combustion characteristics of diesel and biodiesel such as burning rate and flame shape are determined by using the porous-sphere experimental technique. Fuel has been transpired to the surface of a porous sphere. Burning of the fuel takes place on the surface of the porous sphere, which is placed in atmospheric pressure and temperature under normal gravity conditions. For each sphere size and fuel type, the fuel feed rate will vary and the same is recorded as the burning rate for that configuration. The burning rate is determined experimentally and compared for diesel and biodiesel of Pongamia Pinnata (Karanja). The flame shape is analyzed by post-processing the digital image of the flame photograph using suitable imaging software. Results show that the diesel fuel has higher burning rate and evaporation rate when compared to biodiesel. The height of the diesel flame, smoke emission and its luminosity is higher than that of biodiesel. 
      PubDate: 2013-03-21
      Issue No: Vol. 4 (2013)
       
  • Specific Contact Resistance of CuxO Thin Films Deposited by r. f.
           Sputtering Method

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      Authors: Dr. Jayanta Pal
      Abstract: This paper contains measurement of contact resistivity and bulk resistivity of CuxO (0<x<1) thin films deposited by r. f. sputtering method. The conditions for deposition of CuxO thin film were optimized by varying the r. f. power to vary the contact resistivity and bulk resistivity. Electrical characterizations were performed by Transmission Line Model (TLM) and Vertical Transmission Model (VTM) studies. The films deposited on glass substrate have contact resistivity in the range 2.53 – 15 W-cm2 and bulk resistivity in the range 0.35 – 0.96 W-cm. 
      PubDate: 2012-11-30
      Issue No: Vol. 4 (2012)
       
  • Texture Segmentation Using Multichannel Filtering And Kohonen’s Self
           Organizing Map

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      Authors: Meenakshi Pramanik, Parichay Das
      Abstract: The texture is very important cue in region based segmentation of images. Texture features play a very important role in computer vision and pattern recognition. Texture segmentation can be broken down into two areas, feature extraction and clustering. In this paper, we implement two stage of feature extraction technique using multichannel filter and Self Organizing Map (SOM). Firstly, we go through channel filters, also known as 2-D Gabor functions. The texture features are extracted using a multichannel approach. The channels comprise of a set of Gabor filters having different sizes, orientations, and frequencies to constitute feature vector. This feature vectors are then given to SOM for feature reduction. From the result we can analyze that the disadvantage of using Gabor filters in texture analysis, i.e., the higher dimensionality of the Gaborian feature space is overcome by the reduction in the dimensionality of the feature space achieved by SOM. It is found that the incorporation of secondary feature vectors improves the classification performance and reduces the complexity of the feature extraction and classification stages. 
      PubDate: 2012-11-30
      Issue No: Vol. 4 (2012)
       
  • Performance Evaluation of Wood Gasifier

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      Authors: Ashok J. Keche, G. Amba Prasad Rao, Rajendrakumar G. Tated
      Abstract: Generating electrical energy through biomass has advantages besides achieving self-sustainability. Biomass is particularly useful for agriculture dependent economy nations like India.Energy conversion systems based on biomass are particularly interesting because biomass utilization effectively closes the carbon cycle. An experimental investigation on biomass based gasifier engine system of 35kVA capacity has been carried out for power generation application. Problems of cooling and cleaning hot and dirty gas from gasifier has been satisfactory solved by cooling and filtration system. The gasifier developed is observed to be operator friendly.The quality of gas is evaluated in terms of its composition, conversion efficiency and total particulate matter. Maximum output of power plant was obtained at combustion zone temperature of 850ºC. The experimental investigations show that the percentage reduction in total particulate matter is 89.32%. The conversion efficiency of biomass gasifiers is found to be dependent on gasifier operating conditions and fuel properties. The optimum value of equivalence ratio was observed to be 0.3134 for achieving maximum gas conversion efficiency of a present gasifier configuration.
      PubDate: 2012-11-30
      Issue No: Vol. 4 (2012)
       
  • Effective Reduction of Emissions of a DI Diesel Engine fuelled with
           Biodiesel and Diesel Blends with Oxygenated Additives

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      Authors: Amba Prasad Rao, U. S. Vara Prasad, K. Madhu Murthy
      Abstract: Fatty acid methyl ester, popularly called biodiesel, has become more prominent alternate fuel for diesel engines on the basis of single-fuel concept. Since use of neat biodiesel on a large scale is raising certain constraints, both in terms of long-term availability of feed stock, fertile land and high NOx emissions, biodiesel is being adopted in blended form with petro-diesel fuel as B20 or B40. However, the HC and NOx emissions of these blends are still on the higher side. The present work aims at experimental evaluation of a single-cylinder water-cooled diesel engine by adopting different amounts of ethanol and di-ethyl ether blends in order to further improve performance and emission characteristics of blends. Besides employing these oxygenated additives, simultaneous influence of fuel injection pressure is also investigated to arrive at the optimum blend for the chosen engine configuration. Higher brake-specific fuel consumption values are realized with these additives compared to pure diesel fuel operation of the engine; however, significant reduction in gaseous emissions is obtained.
      PubDate: 2012-08-20
      Issue No: Vol. 4 (2012)
       
  • Use of Refrigerating Technologies in Cold Chain Solution: A
           State-of-the-Art

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      Authors: Munesh kumar sharma, D. Buddhi
      Abstract: This paper reviews the development of cold thermal storage technology. In this work, a review has been carried out of the operating strategies, management and thermal load, cold storage types and storage media, current and alternative possible technology for food transport refrigeration and thermoelectric cooling and power generation used in the cold chain. Conservation and transport of temperature-sensitive materials and applications are discussed. This paper lists over 89 references.
      PubDate: 2012-08-20
      Issue No: Vol. 4 (2012)
       
  • Environmental Value Engineering Analysis on Performance Optimization of an
           Oil Fired Crucible Furnace using Oscillatory Combustion Technology

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      Authors: Venkata Aditya Nag Mannepalli
      Abstract: Environmental Value Engineering Concept (E.V.E.) is a proven disciplined approach for improving measurable efficiency parameters for any organization or a system. In this paper, Overall Equipment Effectiveness (O.E.E.) for oil fired crucible furnace, which is a metric for Total Productive Maintenance initiative, has been calculated. As this performance was below the expectation level and resulting into outsourcing of jobs at higher cost, the E.V.E analysis was taken under consideration for overall performance improvement of the furnace. This paper deals with the application of E.V.E concept has been applied for process improvement considering O.E.E. as a parameter in the furnace system through the usage of Oscillatory Combustion Technology. Few modifications in the furnace set up were also carried out and are experimented the furnace at different scenarios. The outcome of this work was a visibly clean exhaust, optimized combustion efficiency which not only saves the environment but also a lot of expenditure on fuel consumption. Successful implementation of this concept has resulted to achieve the best performance of the furnace in a cost effective manner.
      PubDate: 2012-08-20
      Issue No: Vol. 4 (2012)
       
  • Temperature Variation and Energy Performance with or without PCM due to
           Introduction of Heat Loads

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      Authors: Munesh kumar sharma, D. Buddhi
      Abstract: Food transport and storage at low temperatures has always been an important matter worldwide and is becoming even more important due to dietary needs and population growth. The issue of improving food storage applies to food transportation in refrigerated vans and food storage in domestic refrigerators and freezers. In this paper, heat loads are introduced into a freezer and vegetable zone through short door openings (five door openings lasting 1 min each and spaced at 30 min intervals) and single 3 min door opening with and without phase change materials (PCMs) with static conditions (no fan to circulate cold air) and with dynamic condition (with fan to circulate cold air) ambient air through the walls. Also the performance of PCM inside the refrigerator (freezer and vegetable zone) with varying the mass with surface area in both static and dynamic conditions was investigated. The temperature responses of the freezer with and without PCM are examined, with regards to heat loads introduced through door openings and power loss. Energy consumption of the refrigerator with and without PCM is also investigated.
      PubDate: 2012-08-20
      Issue No: Vol. 4 (2012)
       
  • Improving Power System Dynamic Behavior through Control Strategies in Wind
           Energy Conversion Systems

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      Authors: Lata Gidwani, Dr. H. P. Tiwari
      Abstract: The feed-in power to the grid in Wind Energy Conversion Systems (WECS) shows always a high fluctuation resulting in power quality problems. These problems clearly show that there is a strong need for controlling various stages of WECS, such as generator control, converter control, and inverter control. This paper presents an overview of various control strategies applied to WECS. Emphasis is placed on introducing the control techniques followed by a description of methodologies adopted. The current research work being undertaken by various groups is also highlighted.
      PubDate: 2012-04-05
      Issue No: Vol. 4 (2012)
       
  • Interfacing Renewable Energy Sources to the Utility Power Grid Using a
           Motor-Generator Set

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      Authors: PavanKumar Y V, Y Jaganmohan Reddy, K. Padma Raju
      Abstract: This paper describes modeling and simulation of a utility grid-connected renewable energy based hybrid power system (HPS) in the aspect of improving power quality. In order to meet sustained load demands during varying natural conditions, different renewable energy sources and power conditioning units need to be integrated with each other. The paper focuses on the combination of photo voltaic (PV) cell, wind turbine (WT), fuel cell (FC), and battery systems for power generation. To improve power quality of the power system, the proposal is to use DC motor-synchronous generator set instead of conventionally used static inverters. A diesel engine is also coupled to synchronous generator as a standby prime mover to improve the reliability of the overall system during varying natural conditions like wind velocity, irradiance, temperature, etc. The proposed control algorithm acts as a bridge between load fluctuations and generating capacity, for managing available resources economically. The results show that the proposed hybrid power system can effectively manage the optimal utilization of primary energy sources and improve the power quality in both islanding mode as well as grid-connected mode.
      PubDate: 2012-04-05
      Issue No: Vol. 4 (2012)
       
  • Performance Evaluation of Battery Electric Vehicles – A
           Computational Study

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      Authors: V. L. Narasimha Ravi K, Dr. G. Amba Prasad Rao
      Abstract:  Technological innovations have brought significant developments in internal combustion engine-powered automotive vehicles. With the automotive population explosion, issues of fossil fuel crisis and environmental degradation are enticing the researchers to divert focus on alternate fuels and alternate power sources to keep the automotive industry alive. Owing to global warming and associated pollution hazards, many nations are imposing stringent emission norms. To meet the target zero emission levels, researchers are seriously working to develop viable electric vehicles. In this regard, developed nations have done their might to commercialize different variants of electric vehicles. Computer simulations are being tried out to arrive at optimal designs. Electric vehicles are powered by various power packs available commercially, viz,. Pb-acid, Ni-MH, Ni-Cad, etc., with the choice lying in the application. The present work deals with the comprehensive modeling of battery performance parameters using the software MATLAB. It deals with the evaluation of performance parameters such as acceleration performance and range considering simplified Federal urban driving schedule, European driving cycle and Indian driving cycle. Commercially available electric car JOLT EVION is chosen for validating the modeling results. Modeling studies revealed that there is still larger scope for Pb-acid power packs as others pose either environmental hazards or cost constraints. Few of the myths in the usage of electricity are found to be highly deceptive. It is felt that government incentives for automotive industry may promote commercial use of electric vehicles. 
      PubDate: 2012-04-05
      Issue No: Vol. 4 (2012)
       
  • Biomass Energy – A Sustainable Option for Power Generation in Rural
           India

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      Authors: Atul Sharma, Jaya Srivastava
      PubDate: 2012-04-05
      Issue No: Vol. 4 (2012)
       
  • Thermophilic Adaptation of Anaerobic Sludge for Electricity Production

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      Authors: Ankur Agarwal, S Anandita, Saurabh Singh Chauhan
      PubDate: 2011-12-26
      Issue No: Vol. 4 (2011)
       
  • Life Cycle Cost Optimization of Various Building Envelope Configurations
           with Thermal Load of an Energy Efficient Building Situated in Composite
           Climate of India

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      Authors: Dr. Dharm Buddhi, Dr. Ashok Kumar, Dr. D S Chauhan
      PubDate: 2011-12-26
      Issue No: Vol. 4 (2011)
       
  • Extraction of Thevetia peruviana Seed Oil and Optimization of Biodiesel
           Production Using Alkali-catalyzed Methanolysis

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      Authors: Shrikant Balkisan Dhoot, D.R. Jaju, S.A. Deshmukh, B.M. Panchal, M.R. Sharma
      PubDate: 2011-12-26
      Issue No: Vol. 4 (2011)
       
  • A Fuzzy Logic Based Electronics Load Controller for Self-excited Induction
           Generators

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      Authors: Anjali Garg, K. S. Sandhu, L. M. Saini
      PubDate: 2011-12-26
      Issue No: Vol. 4 (2011)
       
  • Opto-electrical and Structural Properties of CuxO Thin Films grown by R.
           F. Sputtering Method

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      Authors: Jayanta Pal
      Abstract: CuxO (0<x<1) thin films were deposited on glass substrate by r. f. sputtering method at different r. f. power in an atmosphere of O2 and Ar. The conditions for deposition of CuxO thin film were optimized by varying the r. f. power for the deposition to vary the energy band gap of the deposited film. Structural characterizations were performed by XRD and TEM studies. The films deposited on glass substrate have an electrical resistivity in the range 0.1 – 0.9 W-cm and a transmission less than 50% in the visible region. Electrical properties were studied in detail and the activation energies were found to depend on r.f. power of deposition. The optical band gap of the CuxO thin films were varies from 1.75 eV to 1.95 eV.
      PubDate: 2011-05-03
      Issue No: Vol. 4 (2011)
       
  • Comparative Performance of Phase Change Materials for Solar Thermal
           Storage System

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      Authors: Sanjay Annaso Khot, N. K. Sane, B. S. Gawali
      Abstract: This paper is aimed at understanding the melting behavior of different Phase Change Materials (PCM) encapsulated in a spherical capsule. The melting process of PCM enclosed in spherical capsule has been investigated computationally and experimentally in the range of parameters useful for solar water heating applications. CFD predictions of the melting of two different PCMs viz. savE® HS-58 and Paraffin wax (PW) inside a spherical capsule have been obtained. Experiments are performed by fixing the thermocouples in PCM inside a spherical capsule at various radial positions for HTF temperature of 70oC with a capsule of radius 41 mm. It can be inferred that melting point of HS-58 is in close requirement of solar water heating application with highest latent heat 247 kJ/kg compared to 190 kJ/kg of Paraffin Wax. Further Specific heat of HS-58 is also higher than PW and HS-58 is a mixture of organic and inorganic compound.   It is also noticed that for the same weight HS-58 stores 19% of more heat with less volume compared with PW at average HTF temperature of 70oC around the spherical capsule.
      PubDate: 2011-05-03
      Issue No: Vol. 4 (2011)
       
  • INVESTIGATIONS ON BIODIESEL FROM WASTE COOKING OIL AS DIESEL FUEL
           SUBSTITUTE

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      Authors: Jagannath Balasaheb Hirkude, Atul S. Padalkar
      Abstract: The waste cooking oil (WCO) as alternative fuel for diesel engines is the aim of this investigation. The high viscosity and poor volatility are the major limitations of waste cooking oil for their utilization in diesel engine. The most convenient method to use waste cooking oil as fuel is to convert it into biodiesel through transesterfication. The properties of waste cooking oil methyl ester such as viscosity, specific gravity, calorific value and flash point temperature were determined and compared with mineral diesel. This paper presents the results of investigations carried out on a brand new (Laxmi Industries, India made), single-cylinder, four-stroke, direct-injection, diesel engine operated with biodiesel of waste cooking oil blended with mineral diesel. Performance parameters like brake thermal efficiency, brake specific fuel consumption, exhaust gas temperature have been discussed. Present study is also carried out to investigate emission characteristics (particulate matter, SOx, NOx, CO2, and CO) of blended biodiesel with mineral diesel in different composition. The performance parameters for different WCO biodiesel blends were found to be very close to diesel and the emission characteristics of engine improved significantly. It is possible to save  21606 by running the engine on B50 mode (Daily 6 hour’s operation for 300 days).The experimental results proved that use of biodiesel (produced from waste cooking oil) is viable option to diesel in diesel engine.
      PubDate: 2010-12-01
      Issue No: Vol. 4 (2010)
       
 
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