Hybrid Wind System-Seminar Report

hybrid wind system


          Hybrid wind system is a combined system of wind and solar power generation system. Aero turbines convert wind energy into rotary mechanical energy.  A mechanical interface, consisting of a step-up gear and a suitable coupling transmits the energy to an electrical generator.  The output of this generator is connected to the Battery or system grid. The battery is connected to the inverter. The inverter is used to convert DC voltages to AC voltages. The load is drawn current from the inverter. Wind power ratings can be divided into three convenient grouping, small to 1kW, medium to 50 kW and large 200 kW to megawatt frame size.

Solar energy means all the energy that reaches the earth from the sun.  It provides daylight makes the earth hot and is the source of energy for plants to grow. Solar energy is also put to two types of use to help our lives directly solar heating and solar electricity.

Solar electricity is the technology of converting sunlight directly in to electricity.  It is based on photo-voltaic or solar modules, which are very reliable and do not require any fuel or servicing. Solar electric systems are suitable for plenty of sun and are ideal when there is no main electricity.


            Wind energy offers another source for pumping as well as electric power generation.  India has potential of over 20,000 MW for power generation and ranks as one of the promising countries for tapping this source.  The cost of power generation from wind farms has now become lower than diesel power and comparable to thermal power in several areas of our country especially near the coasts.
  Wind power projects of aggregate capacity of 8 MW including 7 wind farms projects of capacity 6.85 MW have been established in different parts of the country of which 3 MW capacities has been completed in 1989 by DNES. Wind farms are operating successfully and have already fed over 150 lakes units of electricity to the respective state grids. Over 25 MW of additional power capacity from wind is under implementation.  Under demonstration programmer 271 wind pumps have been installed up to February 1989.  Sixty small wind battery charges of capacities 300 watts to 4 kW are under installation. Likewise to stand-alone wind electric generators of 10 to 25 kW are under installation.


  The major advantage of this design is that the rotor blades can accept the wind from any compass. Another added advantage is that the machine can be mounted on the ground eliminating tower structures and lifting of huge weight of machine assembly, i.e. it can be operated close to the ground level.  Since this machine has vertical axis symmetry, it eliminates yaw control requirement for its rotor to capture wind energy.  A dual purpose and relatively simple shaft axis support is anticipated as well as ground level power output delivery due to presence of vertical shaft.  This may in turn, allow easier access and serviceability.  Airfoil rotor fabrication costs are expected to be reduced over conventional rotor blade costs.  The absence of pitch control requirements for synchronous operation may yield additional cost savings.  The tip speed ratio and power coefficient are considerably better than those of the S-rotor but are still below the values for a modern horizontal-axis, two-bladed propeller rotor.


 Rotor power output efficiency of a Darrieus wind energy conversion system is also somewhat lower than that of a conventional horizontal rotor.Because a Darrieus rotor is generally situated near ground proximity, it may also experience lower velocity wind compared to a tower mounted conventional wind energy conversion system of comparable projected rotor disc area.  This may yield less energy output.


Direct heat applications

Mechanical motion derived from wind power can be used to drive heat pumps or to produce heat from the friction of solid materials, or by the churning of water or other fluids, or in other cases, by the use of centrifugal or other types of pumps in combination with restrictive orifices that produces heat from friction and turbulence when the working fluid flows through them. This heat may then be stored in materials having a high heat capacity, such as water, stones, eutectic salts, etc.,

A home heating system that uses a wind powered pump and a restrictive orifice to derive direct heat for a building, without first generating electricity also has been developed.

Electric Generation Applications:

            Wind power can be used in centralized utility applications to drive synchronous A.C. electrical generators. In such applications the energy is fed directly into power networks through voltage step-up transformers.


By the use of tube light we can save about 40% of energy more than that of discharge lamps and it is possible to get a better illumination at the street and this energy can be utilized at required hour and due to this there are following advantages.
*     By the use of tube light the colour determination will be better.
*     By the use of this light the hard beams would not be there so that accident due to this is avoided in the road.
*     It has comparatively longer life than others.
*     The energy consumption comparatively lesser than the other.
*     It can be placed for illumination at any position.
*     it’s construction is simple and requires less maintenance.
*     Since it is not a point source, the illumination level will be higher i.e., the illumination is throughout its length, and the size of the tube is 1.2m.


Solar modules are a good source of electricity because they are reliable simples to operate and do not require fuel.

The main application for solar electricity is in remote sunny areas that have no main electricity and the supply of fuel for generator is unreliable or expensive.

Many appliances in homes and small institutions can be run on solar electricity.  Here is a list of energy:

(1)              Solar power calculator.
(2)              Street lamp.
(3)              Jack pumps that lift water from a depth of 330m.
(4)              Soldering iron.
Electric drill, sewing machine, high voltage fly killer, science laboratory apparatus, slide projector and

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