Thursday, January 24, 2013

Water Home Heating System

Introduction to water home heating system:

Example of home water heating system is Immersion heater or the Geyser and solar water heater.

Geyser is an appliance based on the heating effect of the electric current is used to heat water.The heating element consists of a long wire of nichrome in the form of a coil which is concealed in  a metal tube which is earthed. The coil is insulated from the metal  tube by using magnesium oxide powder, which is an insulator of electricity but conducts heat.

The end of the heating element is fixed to a Bakelite case with the help of screws. The ends are connected to a 3-pin plug with the help of flexible wires. There is a metal strip fixed to the Bakelite case. It is not only act as hanger for the water heater, but also used to earth connections. It is also act as a water level indicator. For proper functioning of the heater, the minimum and maximum levels indicated must be observed. Before switching to the current the immersion heater is suspended vertically in the bucket containing water up to the level indicated. When the current is switched on, the heat produced in the coil is passed to the water.

Before removing immersion heater from water, the current should be switched off.

Water Home Heating System

Solar water Heater:

The heat energy released from the sun is trapped and converted those solar heat radiations to heat up the water. Solar energy is the renewable form  of energy. In solar water heating  the storage tank is horizontally mounted  immediately on the solar collectors on the  roof .These are designed  to deliver  the optimum amount of heat the storage tank is below the solar collector, a  circulating pump moves water between tank and collector.

Energy Conversion in Water Home Heating System

The amount of heat energy released from the sun is trapped by the solar heat collectors which in turn transforms solar radiated energy into heat energy. The water circulating will absorb the heat liberated at the collector region and gets heated up. So solar energy can be converted into heat energy.

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