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Flashcards in Energy transfers Deck (10)
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1

Describe the energy transfers in your average power station.

- Non-renewable fuels like coal have CHEMICAL ENERGY
- When they are burnt in a huge furnace this is transferred to HEAT ENERGY
- This heat energy is used to boil water into steam which has KINETIC ENERGY and this is used to turn a turbine
- Turbine uses its kinetic energy to drive a generator which transfers the energy to ELECTRICAL ENERGY

2

Describe the energy transfers in a nuclear fission reactor.

- When a nucleus splits it releases a lot of energy in the form of KINETIC ENERGY
- This is transferred to HEAT ENERGY in a heat exchanger
- The heat energy transfer itself to water and so the water is boiled and the steam has KINETIC ENERGY
- This energy is then used to turn a turbine which drives a generator, creating ELECTRICAL ENERGY

3

Describe the energy transfers in a wind farm.

- KINETIC ENERGY from the wind transferred to ELECTRICAL ENERGY when it turns the propeller

4

Describe the energy transfer in geothermal energy

- Cold water is pumped down into the earther crust when hot rocks transfer their HEAT ENERGY to the water, turning it to steam which has KINETIC ENERGY
- The steam drives a turbine, and then a generator, creating ELECTRICAL ENERGY

5

Describe the energy transfers solar cells

- LIGHT ENERGY from the sun directly into ELECTRICAL ENERGY

6

Describe the energy transfers in solar heating systems

- LIGHT ENERGY from the sun is converted to HEAT ENERGY as it heats up water in black pipes

7

Describe the energy transfers in wave power

- KINETIC ENERGY from the movement of waves into ELECTRICAL ENERGY

8

Describe the energy transfers in pumped storage

- Water is released from an upper reservoir at peak time.
- The KINETIC ENERGY from the falling water is converted into ELECTRICAL ENERGY by a turbine and generator

9

How does fibre glasswool prevent energy loss by conduction and convection.

- The air spaces in fibres means that fibres are very bad conductors because the air particles are widely spaced so cannot transfer heat energy vibrations very well.
- Air in the insulating layers cannot move so it prevents the formation of convection currents.

10

How do humans reduce heat loss from themselves?

- In the cold your hairs stand up on end to trap an insulating layer of air around the body
- Air pockets between you and your close reduced conduction and convection
- Clothes also reduces heat loss by radiation