3-3 Knowing more: Heat of the sun (3.1)

• Natuurkunde
• Middelbare school
• havo, vwo
• Leerjaar 2

Knowing more: heat (3.1)

Heat of the sun

Solar boiler - free energy 

from solar radiation

• Solar colector: water flows through black tubes (roof)
  
• Solar radiation is absorbed and heats up the water
• Hot water goes to the hot water taps.  
• In a storage tank the hot water is kept warm by the central heating system

No pump required: Thermosiphon-system

Storing heat

Groundwater - in the summer water

is used to cool down a building and 

in the winter the same water heats up

the building.

Heatpump

- Groundwater = 15 degrees

- It flows alongside the heating water of a building = +15 degrees  (30)

- and with a heatpump this is increased to 40 degrees

Residual heat

Power stations use 

steam turbines (fossil fuels)

• Residual heat goes into the 
  

         river with coolingwater

• It is also possible to pump this warm water to housing estates.
  
• Growers in horticultural areas use it to heat greenhouses.
  
  

This is an example of a...

1. Solar boiler
2. Thermosiphon system
3. Solar panel

Name two uses for residual heat.

Explain how you can store heat of the summer.

Questions (p 107)

17 up to 20

When you are done

Read up on residual heat or 

a heatpump

What have you
learned today?