World Of Electrical

Design of Submersible Motor Design of Submersible Motor Submersible motor is used to drive the submersible pump. Submersible motor is also a squirrel cage type induction motor. Its principle and the general construction is similar to the squirrel cage type induction motor. It means there is laminated stator core and three phase winding in it and there is squirrel cage rotor. But as the whole motor is under water, special type of construction has to be employed. Mainly all the parts are made of the corrosion resistance type materials. Its diameter is less and the axial length is more. Instead of using the ordinary bearings the thrust bearings are used. There are two types of construction of the submersible motor. (1) Wet type submersible motor: This type of motor is completely filled with clean water or oil or emulsion of water and oil. (2) Dry type submersible motor: In this type of motor the stator winding is dry and

Classification of Hydro Electric Power Plant | Advantages and Disadvantages of Hydro Electric Power Plant Classification of Hydro Electric Power Plant | Advantages and Disadvantages of Hydro Electric Power Plant Classification of Hydro Electric Power Plant is mentioned below: (1) Based on availability of head: These are further classified as: (a) Low head plants (b) Medium head plants (c) High head plants (2)Based on nature of load: These are further classified as: (a) Base load plants (b) Peak load plants (3) Based on quantity of water available: These are further classified as: (a) Run-off river plants without pondage (b) Run-off river plants with pondage (c) Storage type plants. (d) Pumped storage peak load plants. (e) Mini and micro-hydel plants Advantages of Hydro Electric Power Plant ✓ Though its capital cost is comparatively high but it's operation cost is much less. Due to this the cost of power genera

Schematic Layout of Hydro Electric Power Plant | Working Of Hydro Electric Power Plant A schematic layout of hydro-electric:power plant is shown in below figure. Schematic Layout of Hydro Electric Power Plant A large amount of water is collected during rainy season in a reservoir behind a dam. In case the rainfall is low in a particular year the low head of the reservoir will not be able to meet the maximum load. Therefore, the present trend is to use hydro-electric power plant with steam power plant in an interconnected system. The main components of the hydro-electric power plant and their functions are as follows: (1)Reservoir: A reservoir is used to provided to store water during rainy season and supplies the same in dry season.  The water which comes from the reservoir is used to run the hydraulic turbine. (2) Dam: A dam is define as a structure of considerable height built across the river. The function of dam i

Site Selection For Thermal Power Plant There are some factors must be considered for site selection for thermal power plant which is mentioned below: Site Selection For Thermal Power Plant 1.Availability of raw material 2.Nature of land and its cost 3.Availability of water 4.Load centre 5.Transport facilities 6.Availability of labour 7.Ash disposal facilities 8.Future expansion 9.Pollution 10.Away from air fields Detail Description of all the factors must be described below: 1. Availability of raw material: Modern steam power plants using coal or oil as fuel require very large amount or fuel per annum. On rough estimates, a steam power plant of 300 MW capacity requires about 3000 tonnes of coal per day. Therefore, it is necessary to locate the plant as far as possible near the coal fields to reduce the cost of transportation of fuel. If the plant is located away from coal fields it may create probl

Steam Power Plant  Generally, thermal power plant is one which is used to produce electrical power on a large scale. Steam Power Plant A steam power plants are used in which the chemical energy of a fuel is utilized to generate high pressure, high temperature steam in a boiler. Which steam is used in a turbine to produce mechanical power which is finally converted into electrical energy by an alternator. This is represented by a simplified block diagram, which is shown in below figure. Fuel used may be coal,oil or natural gas. Block Diagram for energy conservation in steam power plant In a steam power plant, various heat recovery systems like air pre-heater, Economiser are used to improve the thermal efficiency in the steam power plant. Various components of a steam power plant with their function are explained below: (1) Blower: Function of the blower is to draw the surrounding air needed for combustion of fuel in the steam power plant. The ai

What is Electronic Data Interchange ? | Working of Electronic Data Interchange What is Electronics Data Interchange ? | Working of Electronics Data Interchange EDI full name is Electronic Data Interchange . What is Electronic Data Interchange ? It is a communication system in which data from one computer to another is transferred electronically from one computer to another computer because there is no paper work in transferring data.  This is why it does not require any human intervention. What is Electronics Data Interchange? The full name of EDI is Electronic Data Interchange . By its name we come to know that it is an electronic data interchange system. Now a days EDI is mostly used in (B2B e-commerce) e-commerce. Very much by EDI  Quantity of data is transferred, usually some EDI documents are used tSls: 1. Invoice  2. Purchase order  3. Shipping request Advantages of Electronic Data Interchange  ✓ It takes