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(7-10) Electrical and Electronics B.Tech Seminar Full Report

Electrical and Electronics B.Tech Seminar Full Report of

COGENERATION

ABSTRACT

Cogeneration (also combined heat and power, CHP) is the use of a heat engine or a power station to simultaneously generate both electricity and useful heat.All power plants emit a certain amount of heat during electricity generation. This can be released into the natural environment through cooling towers, flue gas, or by other means. By contrast CHP captures some or all of the by-product heat for heating purposes .Thermal power plants (including those that use fissile elements or burn coal, petroleum, or natural gas), and heat engines in general, do not convert all of their thermal energy into electricity. In most heat engines, a bit more than half is lost as excess heat . By capturing the excess heat, CHP uses heat that would be wasted in a conventional power plant, potentially reaching an efficiency of up to 89%, compared with 55% for the best conventional plants. This means that less fuel needs to be consumed to produce the same amount of useful energy.
Cogeneration finds much applications in distribution fields.It is used along with coupled microgrids to improve highly reliable and efficient distribution system.

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Electrical and Electronics B.Tech Seminar Full Report of

 SMART GRID

ABSTRACT

Electricity networks operators must operate their network with a high degree of efficiency and reliability. Presently the drivers for lower-carbon electricity generation technologies are high, and to accommodate such technologies (e.g. large-scale wind power), significant changes have to be made to the way that Transmission and Distribution (T&D) networks are designed and operated. The Smart Grid concept has been introduced to highlight alternative, automated technologies that may bring significant benefits to the T&D networks. This report summarizes smart grid technologies within the T&D sector that in terms of technology readiness are superior to other technologies, and are expected to be deployed in the near future. It also summarizes the drivers behind development of the smart grid, then by introducing some smart grid technologies, their potential applications and benefits are discussed. The engineering challenges which may prevent large scale deployment of smart grid technologies is discussed.

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Electrical and Electronics B.Tech Seminar Full Report of

 LIGHT EMITTING POLYMER

ABSTRACT

 The seminar is about polymers that can emit light when a voltage is applied to it. The structure comprises of a thin film of semiconducting polymer sandwiched between two electrodes (cathode and anode).When electrons and holes are injected from the electrodes, the recombination of these charge carriers takes place, which leads to emission of light .The band gap, ie. The energy difference between valence band and conduction band determines the wavelength (colour) of the emitted light.

They are usually made by ink jet printing process. In this method red green and blue polymer solutions are jetted into well defined areas on the substrate. This is because, PLEDs are soluble in common organic solvents like toluene and xylene .The film thickness uniformity is obtained by multi-passing (slow) is by heads with drive per nozzle technology .The pixels are controlled by using active or passive matrix.

The advantages include low cost, small size, no viewing angle restrictions, low power requirement, biodegradability etc. They are poised to replace LCDs used in laptops and CRTs used in desktop computers today.

Their future applications include flexible displays which can be folded, wearable displays with interactive features, camouflage etc.

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WIRELESS POWER TRANSMISSION(SPACE-BASED SOLAR POWER)

ABSTRACT

In our scientific community wireless transmission automatically implies messages transfer from one site to another one, without any wire connection. The actual stringent need of energy, possibly clean and renewable, has revived the old SPS (Solar Power Satellite) idea by P. Glaser: in space, a solar energy collector to convert the solar energy into DC electricity, a DC-to-microwave converter, and a large array to beam down the microwave power; over the ground, a large rectenna (rectifying antenna) to convert the microwave power back to DC power. Finally connected to existing electric power network. This implies power wireless transmission, where the information content has no meaning. This wireless power transmission has been studied during the last 50 years, but the drive has always been the quoted application. However, power wireless transmission exhibits a wider scenario: the scientific features and implication of this new world are worth of an independent exploration. This special session within this Symposium has been organized in this spirit. Accordingly, only basic principles related to radiation and propagation of electromagnetic energy are in order. Involvement of the International Space Station (ISS) is a key resource in defining the wireless power transfer demonstration. Transmitter or receiver could be placed on the ISS. Power and sensors can be provided on the ISS. Operation at a 34GHz takes advantage of a reduction in atmospheric absorption to reduce the size of the transmitter and receiver.

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