You might have a geyser, water heater, and room heater at home. How do these gadgets work? By which mode do we get heat from a room heater?
Answer (2)
Geysers, water heaters, and room heaters heat water and air using electricity or gas through various methods. A room heater mainly provides heat through convection, where warm air circulates throughout a room. These devices operate based on thermodynamic principles that transfer heat from a heat source to the desired area.
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Let's explore how each of these gadgets—geyser, water heater, and room heater—work, along with the mode of heat transfer involved with a room heater.
Geyser and Water Heater:
How They Work: Both geysers and water heaters are devices used to heat water. They work on similar principles, primarily using electricity or gas as the energy source.
Electric Geysers/Water Heaters: These appliances use electrical heating elements submerged in water. When electricity flows through the elements, they heat up and directly transfer their heat to the water.
Gas Geysers/Water Heaters: These use a burner powered by natural gas or propane. The burner heats the water flowing through a heat exchanger in the unit.
Room Heater:
How It Works: Room heaters generate heat to warm up a space using different methods like electricity, gas, or other fuels.
Mode of Heat Transfer:
The primary mode of heat transfer from most room heaters is convection . Here's how this works:
A room heater warms the air directly around it.
This warm air rises and circulates around the room.
As the warm air moves, it displaces cooler air, which is then warmed by the heater.
Some room heaters may also utilize radiation :
Radiant heaters work by emitting infrared radiation that directly warms objects and people in front of it.
In summary, while geysers and water heaters heat water using electric or gas energy, room heaters primarily transfer heat through convection (and sometimes radiation) to warm up an indoor space.
