The Immersion Heater Example Flashcards
1
Q
- Where is energy transferred from?
A
The heater coils to the thermal energy store of the water by conduction
2
Q
- What happens to the particles near the coils?
What does this mean?
A
Get more energy, so they start moving around faster. This means there’s more distance between them I,e the water expands and becomes less dense
3
Q
- What does the reduction in density mean?
A
That hotter water tends to rise above the denser, cooler water
4
Q
- What happens as the hot water rises?
A
It displaces the colder water out of the way, making it sink towards the heater coils
5
Q
- What is done to the cold water?
A
The cold water is then heated by the coils and rises - and so it goes on.
6
Q
- What do you end up with?
A
convection currents going up, round and down, circulating the energy trough the water
7
Q
What are convection currents all about?
A
Changes in density
8
Q
When/where is convection most efficient and why?
A
In roundish or squarish containers, because they allow the convection currents to work best
