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HYBRID SYSTEM IN WIND MILL FOR BETTER EFFICIENCY AND MORE PRODUCTION OF RENEWABLE SOURCE OF ENERGY

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In parallel to developing technology, demand for more energy makes us seek new energy sources. The most important application field of this search is renewable energy resources. Wind and solar energy have being popular ones owing to abundant, ease of availability and convertibility to the electric energy. This work covers realization of a hybrid renewable energy system for a domestic application, to utilize the solar and wind power. Power resources and loads in the system are monitored and controlled in real time. The aim of this work is design and implementation of a domestic solar-wind hybrid energy system with piezo material. This work is expected to sustain some part of the daily domestic electricity consumption with an efficient utilization of solar and wind power. This paper presents a theoretical analysis to increase the total power generation of hybrid system that is verified with experimental results. Key Words: hybrid system, wind mill, renewable source of energy
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  SRJHS&EL/    Manish Kumar Maurya & Prashant Vala (1 -8)   Dec-2013, Vol. -I, ISSUE-I www.srjis.com Page 1 HYBRID SYSTEM IN WIND MILL FOR BETTER EFFICIENCY AND MORE PRODUCTION OF RENEWABLE SOURCE OF ENERGY Manish Kumar Maurya B.E. (Electronics & Communications)   Student, Government Engineering College, Bhavnagar, Gujarat, India Prashant Vala B.E. (Electronics & Communications)   Student, Government Engineering College, Bhavnagar, Gujarat, India  In parallel to developing technology, demand for more energy makes us seek new energy  sources. The most important application field of this search is renewable energy resources. Wind and solar energy have being popular ones owing to abundant, ease of availability and convertibility to the electric energy. This work covers realization of a hybrid renewable energy  system for a domestic application, to utilize the solar and wind power. Power resources and loads in the system are monitored and controlled in real time. The aim of this work is design and implementation of a domestic solar-wind hybrid energy system with piezo material. This work is expected to sustain some part of the daily domestic electricity consumption with an efficient utilization of solar and wind power. This  paper presents a theoretical analysis to increase the total power generation of hybrid system that is verified with experimental results. Key Words  : hybrid system, wind mill, renewable source of energy Abstract  SRJHS&EL/    Manish Kumar Maurya & Prashant Vala (1 -8)   Dec-2013, Vol. -I, ISSUE-I www.srjis.com Page 2 1.   Introduction 1.1 Hybrid System: Hybrid power systems combine two or more energy conversion devices, or two or more fuels for the same device, that when integrated, overcome limitations inherent in either. Hybrid systems can address limitations in terms of Fuel flexibility, efficiency, reliability, emissions.   Fig.1 Examples of hybrid power system used in wind mill 1.2 Wind energy The term wind energy describes the process by which the wind is used to generate mechanical energy or electricity. Wind turbines convert the kinetic energy in the wind into mechanical energy. Mechanical energy can be used for specific tasks (such as grinding grain or pumping water) or a generator can convert this mechanical energy into electricity. 1.3 How Many Blades and power efficiency? Most wind turbines use either two or three blades. Research indicates that as more  blades are added there is an increase in aerodynamic efficiency, but this efficiency increase actually decreases dramatically with each added blade. For example, increasing the number of blades from one to two can Yield a six percent increase in aerodynamic efficiency, but increasing the blade count from two to three yields only an extra three percent in efficiency. And, of course, there are cost implications too. A German physicist Albert Betz concluded in  SRJHS&EL/    Manish Kumar Maurya & Prashant Vala (1 -8)   Dec-2013, Vol. -I, ISSUE-I www.srjis.com Page 3 1919 that no wind turbine can convert more than 16/27 (59.3%) of the kinetic energy of the wind into mechanical energy turning a rotor. To this day, this is known as the Betz Limit or Betz' Law. The theoretical maximum power efficiency of any design of wind turbine is 0.59 (i.e. no more than 59% of the energy carried by the wind can be extracted by a wind turbine). The real world limit is well below the Betz Limit with values of 0.35-0.45 common even in the best designed wind turbines. By the time we take into account the other factors in a complete wind turbine system - e.g. the gearbox, bearings, and generator and so on - only 10-30% of the power of the wind is ever actually converted into usable electricity. 1.4 Solar ener   gy Solar power systems include several components working together to convert the sun’s energy into electrical power that can be connected to a building’s standard electrical infrastructure and the utility grid. Solar panels are groups of solar modules connected electrically to generate direct current electricity at the desired voltage and current. A larger grouping of solar panels constitutes a “solar array. The combiner connects multiple wires carrying the electrical current generated by individual solar panels together into a single, larger capacity wire, which then flows to the inverter. The inverter transforms direct current electricity produced by the solar panels into alternating current (AC) electricity 1.5 Energy production using piezo Piezoelectricity is the electric charge that accumulates in certain solid materials (such as crystals, certain ceramics, and biological matter such as bone, DNA and various  proteins) in response to applied mechanical stress. The word piezoelectricity means electricity resulting from pressure.  SRJHS&EL/    Manish Kumar Maurya & Prashant Vala (1 -8)   Dec-2013, Vol. -I, ISSUE-I www.srjis.com Page 4 Fig.2 Experimental set up for hybrid system 2.   NEW CONCEPT We would like to co-relate two examples with this paper: 1)   When fan is switched off, it will take few time to come back to still position. In that duration the rotational energy is without any electrical energy, we can use that rotational energy.   2)   When there is heavy weight on bicycle, it will require more energy in starting but once it comes in motion, the weight seems light. 2.1   Need of speed in calculating wind power: Power  = Watts  = where    Mathematically wind power is directly proportional to speed to the power of three.    Little change in speed effects wind power considerably even for small amount of time. 2.2   How speed is increased??      In the hybrid system used, electricity produced by wind energy and solar energy are joint together at grids.    Power produced by wind is much higher than solar panels.    Assumption: 1) Dynamo is used instead of generator in wind mill.
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