Question

working of an electric geyser???

Answer 1

Parts of an Electric Water HeaterFor the process of heating water we need three main components. They are:*.Dip Tube (Inlet tube):Cold water enters the tank through this tube.*.Outlet Tube:Hot water goes out of the tank through this tube.*.Heating element: This element helps in heating the cold water.There are various other parts used in a water heater.*.Steel tank:This unit holds the water. The steel tank has to be constructed in such a way that it should be able to withstand the pressure of water inside the tank.*.Temperature and Pressure relief valve:These valves are specially placed for safety purposes. This valve prevents the heater from explosion during abnormal conditions like high pressure andtemperature. It can be mounted either at the top of the tank or at the sides of the tank.*.Drain Valve:The drain valve is used for cleaning and maintenance.*.Thermostat:A thermostat is generally used to control or maintain the temperature within the tank.*.Anticorrosion Anode Rod:This rod, also known as a sacrificial anode rod, aids in keeping the steel tank free from corrosion. This rod is made up of magnesium, which attracts corrosive elements and thus prevents the tank from corroding.This rod can be replaced when it becomes eroded.Apart from this there is insulation provided that surrounds the steel tank of the heater.The steel tank is internally coated with an epoxy or glass lining to prevent corrosion (in addition to anticorrosion rod).How Electric Water Heaters WorkGenerally electric water heaters have two heating elements each wired with a thermostat. Both the heating elements do not function simultaneously. First the top heating element functions until theupper tank is hot and then the function is transferred to the bottom heating element, which has its own thermostat. Usually the water in the upper tank is heated from 120-140 F before the control is transferred to the lower heating element.But some heaters have only one heating element which makes maintenance easier. In case of heating element failure it can be detected and replaced easily whenthere is only one heating element.When the hot water is consumed, once again cold water enters through the dip tube and the process is repeated.