Deepakkumar Yadav
Hydro Electric Power Plants Hydro-electric power plants utilise the potential energy of water to move hydraulic urbines which are coupled to electric generators. Therefore, these plants have to be located where the water resources are available in abundance at sufficient head. The first hydro power plant was set up in 1897 at Darjeeling of 200KW … Read more
Methods of Water Treatment Methods of water treatment are : Mechanical treatment Thermal treatment Chemical treatment 1. Mechanical Treatment : The suspended materials in water can be removed by sedimentation, coagulation and filteration In the process of sedimentation the water is allowed to stand still in big tanks for some time. It allows the solid … Read more
Types of Cooling Towers Various types of cooling towers are : Natural draught cooling towers. Mechanical cooling towers. These are further classified as : (a) Forced draught cooling towers. (b) Induced draught cooling towers. 1. Natural Draught Cooling Towers : A natural draught cooling tower is shown in Figure A. Hot water from the condenser … Read more
Comparison between Natural Draught and Artificial Draught Advantages of artificial draught over natural draught : It reduces the necessary height of the chimney. It increases the evaporative capacity of the boiler due to increased quantity of fuel burnt per m’ of grate area. It provides better control of combustion and increases the plant and combustion … Read more
Natural Draught This is produced with the help of chimney, hence, it is also called as chimney draught. The difference in static pressure by the chimney is produced due to the difference in weight of column of hot gases inside the chimney and the weight of equal column of cold air outside the chimney. Since … Read more
Draught System Draught means the force needed to draw. With regard to the boilers the requirement is to provide an adequate supply of air to the furnace grate to maintain the proper combustion of fuel, to draw the resulting gases from the system and to discharge these flue gases from the chimney to the surroundings. … Read more
Cooling Ponds In case the required amount of water is not available at steam power plant site, either the cooling ponds or cooling towers are constructed. The method of cooling the hot water by cooling ponds compared to cooling towers is simple and inexpensive but it is less efficient. The schematic diagram of a cooling … Read more
Necessity of Cooling Ponds and Cooling Towers The circulating water required for condensing the steam in the condenser depends on the extent of vacuum to be maintained in the condenser, hence, it depends on the extent of cooling desired and the temperature of cooling water available. The heated water coming out of the condenser is … Read more
Sources of Air in the Condenser and the Effects of Air Leakages on Condenser Performance Following are the sources of air leakage into the condenser. The air leaks through the joints since the pressure inside the condenser is less than the atmospheric pressure. This can be reduced by proper workmanship while making the joints. The … Read more
Evaporative Condenser The sketch of an evaporative condenser is shown in Figure. The advantage of such condenser is that it needs very small amount of circulating water and the make up water since the coolant is used again and again. However these condensers are only suitable for small power plants. In this, the exhaust steam … Read more