volume-06-Issue 1 (2013)
Latest Articles
Performance Characteristics Analysis of Small Diesel Engines Fueled with Different Blends of Mustard Oil Bio-diesel
IJTEE, volume-06, Issue 1 (2013) , PP 43 - 48
Published: 01 Oct 2013
DOI: 10.5383/ijtee.06.01.007
by Z.M. Hasib, K.A. Rahman from Department of Mechanical Engineering, BUET, Dhaka, Bangladesh
Abstract: Energy is the prerequisite for modern civilization. Fossil fuel is still the main source of energy. But the endless consumption of fossil fuel has brought its reserve about to an end. As a result, fuel prices are gouging as a consequence of spiraling demand and diminishing supply. So we are always in search of alternative and cost effective fuels, to meet our need. Diesel engines are more efficient and cost-effective than other engines. So diesel engines have versatile uses (i.e. automobiles, irrigation, power plants etc.). That is why; consumption of diesel fuel is much higher than other gasoline fuels. This paper estimates the feasibility of mustard oil as an alternative fuel for diesel engine. Mustard is a renewable plant, widely growing in almost everywhere in Bangladesh. In this study, mustard oil is converted to bio-diesel by well known transesterification reaction. Bio-diesel has different fuel properties than diesel fuel. So other than modification of the engine or the fuel supply system, blends of bio-diesel (i.e. B20, B30, B50 etc,) has been used. Finally, a comparison of engine performance for different blends of bio-diesel has been carried out to choose the correct blend for different operating conditions. read more... read less...
Keywords: Mustard oil, Bio-diesel, Blends of bio-diesel, Trasn-esterification.
Renewable or Nuclear Energy? Jordan's Energy Strategy Options
IJTEE, volume-06, Issue 1 (2013) , PP 35 - 42
Published: 19 Jan 2013
DOI: 10.5383/ijee.06.01.006
by Mousa S. Mohsen from School of Engineering, American University of Ras Al Khaimah, United Arab Emirates
Abstract: The gap between energy supply and demand is widening in Jordan. Sound measures to overcome this gap are essential for sustainable energy development. In this paper conventional and non-conventional energy resources are discussed. These include crude oil and natural gas, wind, solar, biogas, geothermal, hydropower, and nuclear power. Using multicriteria analysis, options were evaluated for the best component in the energy mix. It was concluded that solar energy is the most inexpensive source of energy while nuclear power is the most expensive; it seems likely that the Jordanian nuclear power program will prove not to be feasible read more... read less...
Keywords: Renewable energy, Nuclear energy, Jordan
Design, Fabrication, and Performance Evaluation of Double Slope Active Solar Still under Forced Circulation Mode
IJTEE, volume-06, Issue 1 (2013) , PP 27 - 34
Published: 25 Jun 2013
DOI: 10.5383/ijtee.06.01.005
by A.K. Sethi, V.K. Dwivedi from Research Scholar, Department of Mechanical Engineering, Bhagwant University, Ajmer, India, Department of Mechanical Engineering, Galgotias College of Engineering and Technology, Greater Noida, U.P, India
Abstract: Water is fundamental to human life on earth for survival and good health. Access to safe water is a major challenge in many communities in developing countries. As world population and social-economic growth, societies are challenged to provide fresh water to meet those needs for all of their people. Growing demands of freshwater resources are creating an urgent need to develop self sustained system to meet the demand of fresh water. Among the available purification technologies, solar desalination process proves to be a suitable solution for resolving this existing crisis. This renewable energy technology operates on a basic principle of solar water distillation. The sun’s energy heat increases the rate of evaporation. As the water evaporates, water vapor rises and condenses on the glass surface for collection. This process removes impurities such as salts and heavy metals as well as eliminates microbiological organisms. In this study, a basin type double slope active solar still under forced circulation mode was designed and fabricated, and a performance evaluation were carried out for different water depths viz 0.03 m, 0.04 m and 0.05 m. The distillate output is maximum 4.82 kg for water depth 0.03 m and minimum 4.36 kg for water depth 0.05 m. The maximum instantaneous thermal efficiency is 46.96 at water depth of 0.04 m. read more... read less...
Keywords: Active solar still, Water depth, Instantaneous thermal efficiency
Energy Optimization of Heat Engine with Infinite Heat Capacity Reservoirs
IJTEE, volume-06, Issue 1 (2013) , PP 21 - 26
Published: 25 Jun 2013
DOI: 10.5383/ijtee.05.01.004
by Christer Nylund, M. El Haj Assad from Arcada University of Applied Sciences, Jan-Magnus Janssonin aukio 1, Aalto University, School of Science and Technology, Department of Energy Technology, 00076 Aalto, Finland
Abstract: The optimal energy output of a heat engine based on the Carnot process is studied. The internal irreversibility of the engine is considered by taking into account the entropy generation in the adiabatic processes. The engine is connected to high and low temperature thermal energy reservoirs with infinite heat capacity. The process temperatures and the energy conductivity of heat exchangers that maximizes the energy output have been obtained. The effect of the internal irreversibility on the optimal performance of the engine is shown. Two numerical examples are given. read more... read less...
Keywords: Heat engine, Irreversibility, Work.
Experimental Performance of a Direct Evaporative Cooler Operating in Kuala Lumpur
IJTEE, volume-06, Issue 1 (2013) , PP 15 - 20
Published: 25 Jun 2013
DOI: 10.5383/ijtee.06.01.003
by Abdulrahman Th. Mohammad, Sohif Bin Mat, M.Y. Sulaiman, K. Sopian, Abduljalil A. Al-abidi from Solar Energy Research Institute, University Kebangsaan Malaysia, 43600 Bangi, Selangor, Malaysia, Dept. of Mechanical Engineering, Baqubah Technical Institute, Foundation of Technical Education, Baghdad, Iraq
Abstract: The present work presents an experimental investigation on the performance of a direct evaporative cooler in hot and humid regions. The experimental study is based on weather data from Kuala Lumpur, Malaysia. The direct evaporative cooler consists of a cellulose pad with a surface area per unit volume ratio of 100 m2 /m3 . The performance of the evaporative cooler is evaluated using the output temperature, saturation efficiency, and cooling capacity. The output temperature of the air varies between 27.5°C and 29.4° C, while the cooling capacity is between 1.384 kW and 5.358 kW. read more... read less...
Keywords: Evaporative cooler, Saturation efficiency, cooling capacity.
Numerical Simulation of Force Convection in a Channel with Porous Part
IJTEE, volume-06, Issue 1 (2013) , PP 7 - 14
Published: 25 Jun 2013
DOI: 10.5383/ijtee.06.01.002
by Mojtaba Aghajani Delavar, Farzane Mohammadvali from Faculty of Mechanical Engineering, Babol Noshirvani University of Technology, Babol, Islamic Republic of Iran
Abstract: In the present work, two dimensional laminar flow and convective heat transfer between two parallel plates of a symmetric channel were simulated using Lattice Boltzmann Method (LBM). The channel was filled partially with a porous block. The Brinkman- Forchheimer model was used for porous zone. The effects of various parameters such as Reynolds number and porosity on the channel flow and thermal profiles were investigated. It was found that all these parameters have significant influence on thermal field of the channel in certain conditions . read more... read less...
Keywords: Heat transfer, porosity, flow convection
Algerian Strategy in the Context of Sustainable Development: The Case of Green Building
IJTEE, volume-06, Issue 1 (2013) , PP 1 - 6
Published: 25 Jun 2013
DOI: 10.5383/ijtee.06.01.001
by Mohammed El Amine BOUKLI HACENE, Nasr Eddine CHABANE SARI from University of Tlemcen, ALGERIA, 13000, University of Sidi Bel Abbes, ALGERIA, 22000
Abstract: Energy issues and global climate remind us of the urgency of wise use of resources and the necessary changes in the construction industry. Largest consumer of energy and the third emitter of greenhouse gases, it also has other effects, such as the emission of waste, noise, disturbance of the microclimate, consumption water, and groundwater pollution, it would be time to change our gaze to habitats with high potential savings, ecological habitat should meet all these expectations. . In this article we will try to interpret our policy that addresses all the issues mentioned above, and take a challenge to gradually enter into the era of multiple energy and sustainable development, especially in the field of habitat, then we will present a concept of ecological habitat conducted in the city of Tlemcen (west of Algeria). read more... read less...
Keywords: Energy, resources, ecological, policy, sustainable.