PREVIOUS ISSUES » Volume 2 Issue 1 January-March 2014

Volume 2 Issue 1                         January – March 2014

Assessing the Performance of 100 kW Solar PV Power-plants Through I-V …. [1-9]
Pal Rakesh, Dr. Sethi V.K., Gour Anurag
Abstract: The requisite hourly solar radiation data for solar energy system design evaluation and performance studies is generally not available for a number of sites especially in remote locations. As such accurate determination of hourly solar radiation data, is important both at horizontal; surfaces and inclined surfaces. A model to estimate global solar radiation using temperature and sunshine hour data has been developed. We use here the tilted radiation calculation algorithm which is common to all application models (i.e. on-grid, off-grid and water pumping applications) Out of which we are used it for on-grid application. It is used to calculate solar radiation in the plane of the PV array, as a function of its orientation, given monthly mean daily solar radiation on a horizontal surface. These predicted hourly solar radiation data values are compared with measured hourly values to test the accuracy of the models. The total solar radiation on the inclined surfaces and vertical surfaces for different orientations, have also been estimated. The estimated values are found to be in close agreement with measured values. The method presented can be used to estimate hourly, global, diffuse solar radiation for horizontal ….

Rolling Towards Renewability by Studying Photovoltaic Solar Cells and the Comparison [10-15]
Thakur Manvendra Singh, Vyas Savita, Gour Anurag
Abstract: This paper presents a comparative study of photovoltaic solar cells in terms of their production cost, manufacturing methods and the performances under environmental conditions. In this study photovoltaic solar cells are categorized on the basis of the material used i.e. Silicon based solar cells (e.g. mono-crystalline, multi-crystalline, amorphous and micro crystalline forms) the polycrystalline compounds (some of the examples are copper indium disulphide, copper gallium indium diselenide, and Cadmium telluride, copper gallium indium diselenide) and the Organic Solar cells(e.g. polymers, dyes and fullerenes etc.) .It is found that the overall performance of the Silicon based solar cells is much better than the organic and polycrystalline compounds. It is also reported that the quantum efficiency of the Organic solar cells is around 0.1% under 1×10-4 W/cm2 intensity. Thin film silicon solar cells and crystalline silicon solar cells are performing better than the amongst all available options ….

Use of Industrial Waste in Concrete [pp 16-19]
Rajput S.P.S., Dr. Chouhan M.S.
Abstract: The utilization of industrial waste materials like Fly ash, Copper slag, Steel slag, Pons ash, Blast Furnace slag etc. in concrete is gradually gaining significant importance in India considering the disposal, environment problems and gradual depletion of natural resources. These waste materials help to improve the properties of fresh concrete like workability, bleeding etc. It also increases Compressive and Flexure Strength of harden concrete specially when ……

Experimental Investigation for Improving Efficiency of Natural Draft Cooling Tower [pp 20-26]
Randhire Mayur Ambadas, Raghuwanshi Jitendra, Waghdahare Mayur
Abstract: In this experiment, the main element of the cooling system is a natural draft cooling tower. The basic parts of the tower can easily be described and understood; the processes of heat and mass transfer are very complex. In natural draft cooling towers, a process of counter flow heat transfer, in which the water is cooled by air. Between the water and the air, a boundary layer is established, which is considered to be saturated air at the same temperature as the water. In the heat transfer process more than two-thirds of the heat is transferred by evaporation and the rest being transferred by convect ….

MATLAB Graphical User Interface based Analysis of Various Parameters …. [ pp 27-33]
Choudhary Deeksha, Dr. Masand Deepika
Abstract: Induction generators are increasingly being used in nonconventional energy systems such as wind, micro/mini hydro, etc. The advantages of using an induction generator instead of a synchronous generator are well known. Some of them are reduced unit cost and size, ruggedness, brushless (in squirrel cage construction), absence of separate dc source, ease of maintenance, self-protection against severe overloads and short circuits, etc. In isolated systems, squirrel cage induction generators with capacitor excitation, known as self-excited induction generators (SEIGs), are very popular.In contrast to conventional generators, self-excited induction generators are found to be most suitable machines for energizing isolated locations using locally available renewable energy. This paper presents the analysis of a normal three-phase induction motor as a self-excited induction generator (SEIG) to feed single phase loads. Three Capacitor topology ….

HVDC Power Transmission& Technology in India [pp 34-40]
Sharma Shailesh, Kour Paramjeet
Abstract: HVDC is seen as a natural choice over EHVAC for a backbone system since the power flow can be easier controlled, the overhead lines are less costly to build, and underground cables can be used without concerns about reactive power. Rapid development in the field of power electronic devices with turn off capability like Insulated Gate Bipolar Transistors (IGBT) and Gate Turn …..

HVDC Transmission Present Aspects and Review [pp 41-47]
Sharma Shailesh, Kour Paramjeet
Abstract: Increased bulk power transaction in competitive energy market together with large scale integration of energy resources. Control methods for grid-connected parameters are proposed here. The method could be generally applied for all grid-connected Parameter but may be of most importance in high-voltage dc (HVDC) applications. Different from the other control methods, the proposed method utilizes the internal synchronization mechanism in ac systems, in principle, similar to the operation of a synchronous machine. By using this type of power-synchronization control, the VSC ….