Search
1975 articles for “Operative” (ranking capped at the first 2,000 matches — narrow the search to see the rest)
-
Vertical Axis Wind Turbine Modeling and its Analysis Using ANSYS
Abstract: Research on small wind turbine (SWT) is on the upswing in the last five years, as there is a need of energy producing machines to compensate with the fossil fuel based energy. The green technology wishes to create environment friendly energy producing devices based on wind or solar technology. In this paper, an attempt is made to make use of already existing waste wind energy produced by high speed moving …
Published in Journal of Alternate Energy Sources & Technologies · Vol. 8, Issue 1, 2017 · pp. 26–32 Read article
-
Effect of Climate Change on Water Resources
Abstract: Observational records and climate projections provided enough evidence for the effect of climate change on global water resources and its consequences for human societies and ecosystems. It is a big environmental challenge to environmentalist for planning a long term water resources system and its management. Extensive studies are required to establish a relation among hydrology, water resources, planning management, operation management, environmental protection and ecological balance due to climate change. …
Published in Journal of Alternate Energy Sources & Technologies · Vol. 7, Issue 1, 2016 · pp. 44–48 Read article
-
Heat Transfer in Single Effect Solar Assisted LiBr-H2O Absorption Refrigeration Cycle
Abstract: This paper describes the heat transfer model of LiBr-H2O vapour absorption cooling system implemented in engineering equation solver (EES). The detailed first law analysis of the system is presented. Effects of operating temperature and pressure on the heat load in various components, coefficient of performance (COP), and circulation ratio of the system have been carried out. Impact of solution heat exchanger effectiveness on system performance is also studied. The study …
Published in Journal of Alternate Energy Sources & Technologies · Vol. 7, Issue 2, 2016 · pp. 1–11 Read article
-
Experimental Investigation on the Production and Usage of UCVO and WSLO as an Alternative Fuels to Diesel Engines
Abstract: Recently, black/biodiesels are gaining wider popularity as they can be made from renewable resources and wastages, thus, providing an extra environmental values. Indeed, reuse of the waste spent lubrication oil (WSLO) and used vegetable cooking oils (UVCO) has attracted researchers as the wastes generated are on a massive level everywhere and are posing an environmental hazard in handling serious problems of waste management. The transesterification process and centrifuge operations are …
Published in Journal of Alternate Energy Sources & Technologies · Vol. 7, Issue 2, 2016 · pp. 34–44 Read article
-
Review on Design and Development of Hydrogen Production System using HHO Dry Cell Method
Abstract: The current work aims to review an experimental setup for the production of HHO gas. It involves the production of HHO gas by dry cell method, and selecting an appropriate electrolyte for production of HHO gas. The system involves sizing and selection of components like bubbler, measuring devices, moisture removal dryer and safety device like flash back arrestor. HHO gas thus produced can be used in a brazing, welding and …
Published in Journal of Alternate Energy Sources & Technologies · Vol. 7, Issue 2, 2016 · pp. 56–59 Read article
-
Capacity Estimation of Pump Storage System for Microgrid with Resourceful Use of RES in Deregulated Power Sector
Abstract: The present era dominates with green energy, such as the wind, solar, geothermal, tidal, ocean, bio, etc., since these sources plentifully available, pollution free, zero noise. Power shortages in rural, as well as remote areas, encourage the development of green energy sources. To meet the demand by dissimilar configurations such as standalone or grid interconnected microgrid. Standalone green energy microgrid provides the most appropriate solution for electrification of rural and …
Published in Journal of Alternate Energy Sources & Technologies · Vol. 7, Issue 3, 2016 · pp. 37–50 Read article
-
Design and Development of Prototype of Air Cooling System for Truck Cabin using Heat from Engine Exhaust
Abstract: AbstractThe present work, the major spotlight is towards the design and development of a prototype of ai cooling system for the cabin of a truck c using waste heat from exhaust of an engine. From the literature review in the field of automobile air conditioning, it is observed that very less work has been done in the field of cabin cooling of transport trucks, which is crucial. The available options …
Published in Journal of Alternate Energy Sources & Technologies · Vol. 10, Issue 2, 2019 · pp. 18–25 Read article
-
Modelling of DFIG-based Wind Energy Conversion System
Abstract: AbstractToday wind energy plays important role in the competitive wind market. In this paper, we study the performance of the overall doubly-fed induction generator (DFIG) system under different conditions. The DFIG technology has proven to be an efficient and cost-effective solution for variable speed wind turbines. This system allows a variable speed operation over a huge range. In this system, rotor windings connected to grid through a bidirectional back-to-back IGBT-based …
Published in Journal of Alternate Energy Sources & Technologies · Vol. 10, Issue 3, 2019 · pp. 59–64 Read article
-
An Evaluation of Climate-Resilient Urban Transport System Using Climate Change Scenario in Lagos Metropolis, Nigeria.
Abstract: Abstract The objective of this project is to provide transit professionals with information and analysis relevant to adapting [1] transportation assets and services to climate change impacts. Climate impacts such as thermal discomfort and flooding will hinder agencies’ ability to achieve goals such as attaining a state of good repair and providing reliability and safety. The report examines anticipated climate impacts on Lagos transit and current climate change adaptation efforts …
Published in Journal of Alternate Energy Sources & Technologies · Vol. 11, Issue 2, 2020 · pp. 1–14 Read article
-
Analysis of The Performance of A PV/PCM System in Variable Solar Radiation Conditions
Abstract: This paper studies the performance of a PV/PCM system operating at variable solar radiation conditions. The system has been tested for six different solar radiation levels, from 250 W/m2 to 950 W/m2 determining the steady-state temperature for every case. An algorithm has been developed to predict the steady-state temperature. This prediction has produced values within 97% accuracy of experimental data. A reduction of temperature up to 18.9ºC has been achieved. …
Published in Journal of Alternate Energy Sources & Technologies · Vol. 12, Issue 1, 2021 · pp. 1–20 Read article
-
A SIMULATION STUDY OF THE EFFICIENCY OF HIGH VOLTAGE α-Si STAND-ALONE PV INSTALLATIONS
Abstract: The paper analyzes different configurations, direct-PV, PV-battery, either with PWM or MPPregulator, and hybrid-PV, of stand-alone PV installation operating with high voltage α-Si panels thatsupplies energy to a DC-AC external circuit. Global efficiency is determined as a function of voltageconversion ratio and individual element efficiency. The paper concludes that direct-PV is the mostefficient mode with average performance ratio (PR) of 92.2% followed by PV-battery with MPPT,68.3% of efficiency, and PWM …
Published in Journal of Alternate Energy Sources & Technologies · Vol. 12, Issue 2, 2021 · pp. 1–11 Read article
-
Power loss by blade deflection in flexible rotor wind turbines
Abstract: Effects of deflection onto the performance of small wind turbines with flexible rotor-blades have been studied and analysed. The goal of the study has been the evaluation of the wind turbine output power loss due to angular deflection because of bending effects caused by gravity. Wind turbine blades have been deformed under constant load at the tip of the blade for periods up to 40 days. Deformation process has been …
Published in Journal of Alternate Energy Sources & Technologies · Vol. 12, Issue 3, 2021 · pp. 13–29 Read article
-
STRATEGIES FOR TRANSFORMING OIL AND GAS SECTOR FOR ECONOMIC GROWTH AND ENVIRONMENTAL SUSTAINABILITY IN NIGERIA
Abstract: There is great demand for drastic transformation of oil and gas sector for optimal delivery,environmental safety, and economic growth in Nigeria. The ever-increasing demand and insufficient supply of oil and gas products in Nigeria has been a great challenge to her development. This paperhighlighted some strategies for transforming oil and gas sector in Nigeria. Recent annual report of department of petroleum resources were used as the basis for the investigation …
Published in Journal of Alternate Energy Sources & Technologies · Vol. 12, Issue 2, 2021 · pp. 40–45 Read article
-
A Comprehensive Energy Audit for Energy Efficiency Improvement in Commercial Building in Bangladesh
Abstract: As a developing country, Bangladesh is developing rapidly due to the increase in industry and technology. However, the country has been facing an energy crisis for many years to meet growing demand. Gradually, the gap between energy supply and demand is getting bigger and bigger. An effective way to close the gap is to conduct regular energy audits of all departments to help identify losses and wastes and provide room …
Published in Journal of Alternate Energy Sources & Technologies · Vol. 12, Issue 2, 2021 · pp. 12–40 Read article
-
A Review on Load Sharing Control between Wind Energy & Diesel Generator
Abstract: The foundation of any research work is the literature survey. This is based upon the study and field work done by researches. A number of research papers have been published that explains different control strategies for load sharing between two systems. The present survey is about the load sharing between wind turbine system and diesel generator. In this paper, a review of wind- diesel load sharing algorithm was added to …
Published in Journal of Alternate Energy Sources & Technologies · Vol. 12, Issue 2, 2021 · pp. 47–59 Read article