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A novel method to predict the viscosity of biodiesel blends as a simultaneous function of temperature and blend volume percent is proposed. The key advantage of the method is that, it requires only the viscosity data of pure blend components. The lower values of Standard Estimate of Error (SEE = 0.061 − 0.117) and Absolute Average Deviation (AAD = 1.98 − 4.23 %) suggest the predictive capability of...
The present scenario of drying applications has contributed the emerging trends in the field of science and technology. The conventional drying systems have good proven results but at higher energy cost. The alternative means of drying system is the application of solar energy, which yields better results at the very low cost of energy. There is a need to develop the solar systems to achieve the sustainable...
DC microgrid is gaining more prominence due to the development of renewable resources that generate DC output and also due to the increasing use of DC in end-user equipments. Also with DC system, connection of backup energy storage and small size generation is easier to realize. For any system, disconnecting a part of the system during temporary faults is uneconomical and might lead to network instabilities...
The main challenge for DC distribution system is the lack of a good protection system. In this paper a ring type DC microgrid is considered. Upon fault in the grid, the existing system shut down the entire grid. A new protection algorithm is proposed which isolates only the faulted section, without the entire grid shut down. The algorithm senses the fault using differential current and then current...
Solar photovoltaic (PV) arrays have non-linear output characteristics, as a result the faults occurring in PV array may not be detected by conventional protection devices. Line-line fault is one such type of fault occurring in PV array which may remain undetected and the PV array may operates with lower power. Partial shading is also a condition where the PV array may operate at a lower power. Thus,...
In current work, power free mechanism for a vertical axis tracking system suitable for paraboloid collectors along the earth's azimuth has been developed. The proposed tracking system does not demand any external power, as the required energy for tracking system is acquired from the stored potential energy in a spring which connects tracking wheel and foremost top of the tracking system. A Simulation...
Wind energy is a prime sector of the composite renewable energy sector which is supposed to be the prime energy producing force in years to come [1]. The ever increasing demand of wind energy and its renewable nature has led to an emphatic push in development of this sector. Wind speed has been one of those important parameters which form the basic element for design of any wind energy system. Thus,...
Utilization of energy has been rapidly enhanced with our civilization. As a result of fact, huge amount of fossil fuels are used to execute this energy which creates a lot of environmental pollution. New technology of producing energy through alternative route is the need of the hour. One of the major research areas to produces clean energy by electrochemical oxidation of renewable fuel, such as glucose,...
Solar energy is inexhaustible, available abundant in nature and free from pollution. The solar photovoltaic (PV) systems are a perfect solution for urban residential areas since the system is noiseless. The main problem with solar energy is its intermittency. In order to have reliable power, storage batteries are required in case of off-grid system thus it increases the overall cost of a system. In...
In this investigation an effort has been made to find the effect of water depth on distillate production and to establish thermodynamic relations among the operating parameters to study their effects on still performance. In this work water is heated in a water bath and the top cover is replaced with a glass to act as condensing surface. Water is fed into water bath, the gap between water surfaces...
This paper presents optimization of hybrid energy system for electrification of Rajasthan Technical University campus located at Kota, Rajasthan in India. The hybrid energy system comprises more than one energy sources such as solar PV-Diesel Generator or solar photo voltaic (PV)-wind turbine (WT)-Diesel Hybrid system. The main reason for hybrid energy system development is the reliability of solar...
Maximum power point tracking is a method to trap maximum available power from a solar panel. Many algorithms have been developed based on the characteristics of solar panel in order to utilize maximum available power. But these algorithms do not consider local maxima and minima in the solar panel characteristics caused due to shading. In this paper an enhanced version of Perturb and Observe maximum...
In this study, we investigated the performance of honeycomb structured PVC used as packing material inside humidifier in Humidification-Dehumidification Desalination Plant. The affecting operational parameter like mass flow rate of water and air on the performance parameters of humidifier such as range, effectiveness, efficiency, water evaporation rate, heat and mass transfer rate are studied. The...
Researches related to non-conventional energy sources have grown significantly in the present scenario. The electrical energy from the PV panel is considered as one of the most useful natural resources. This paper deals with the operation and control of a grid connected PV system with a nonlinear load. A utility grid connection is provided in order to replenish energy levels in case of power shortage...
Solar concentrators are extensively tested as an alternative for conventional thermal sources. Scheffler concentrators is proving to be very effective in medium temperature applications as it has advantage of easy manufacturing and tracking. Though manufacturing is easy, it is complex to design for any required area of the reflector. The work here is an attempt to make the design process simpler....
This paper addresses the problem of solar photovoltaic water pumping during monsoon weather conditions for domestic and small scale agricultural purposes. Since solar radiation varies rapidly during monsoon conditions, a variable speed water pumping system could be a possible solution for this problem. For fixed head applications, the speed variation should be done in such a way that the maximum power...
Multilevel inverter units for stand-alone solar photovoltaic systems are gaining popularity in the present industrial environment. The number of switching devices, total harmonic distortion, number of output levels and number of sources are the governing factors in a multilevel inverter topology. The classical multilevel inverter topologies produce a considerable amount of switching losses due to...
With increasing load demand and global warming, an environment-friendly type of energy solutions to preserve the earth for the future generations has become a prerequisite. Other than hydro power, many such energy sources like wind and solar energy is highly potential sources to meet our energy demands. Systems which uses two or more renewable energy sources is is better than the single source system...
This paper describes the detailed results of a combined operation of the unified power quality conditioner with the distributed generation. The components of the system are a shunt inverter, series inverter, and a distributed generator. A rectifier is used to connect generator to the dc link. The voltage swell, voltage sag, reactive power, harmonics and voltage interruption in islanded mode and interconnected...
Harnessing electrical power from Renewable Energy Sources (RES) to the grid in a more efficient way requires a power electronic converter. But the power electronic devices introduce harmonics thus affecting the quality of power. A high performance controller is essential to control the real and reactive power flow between the RES and grid without affecting the quality of power. In this paper, grid...
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