1. Solar Heater
- Copper pipe is used because it is a good conductor of heat and will conduct heat into the water inside the pipe. It is painted black colour is a good absorber of heat.
- The glass cover allow radiant heat from the sun to pass through and prevents the weaker energy emitted after.
- The black copper collector absorbs heat energy and conducts it to copper pipes which transmit it to the water.
- The insulating material prevents heat from being lost from the pipe.
- The copper pipe is coiled severally to increase surface area for absorption of heat.
2. Thermos Flask
- The stopper rubber pad and rubber ring pad prevent heat loss through conduction since rubber is a poor conductor of heat
- Silvered wall prevents heat loss through radiation since the shinny surface is a poor radiator and emitter of heat.
- Vacuum prevent heat loss through conduction and convection since the two modes of heat transfer require material medium for transfer of heat.
- Shock absorber prevents breaking of the glass walls due to pressure from the outside.
- Vacuum seal prevents air from reoccupying the vacuum. It is through the vacuum seal that air was sucked out.
3. Green House Effect (Heat Trap)- Green house effect is a phenomenon in which heat is allowed to pass through a transparent material but does not penetrate to the outside. This way heat accumulates in the green house continuously.
- Green houses are used to provide appropriate conditions in plants especially in cold areas.
4. Solar Concentrators
- Concave reflector is used to reflect radiant heat from the sun into a common point (focus). Temperature at this point is very high therefore the concentrated heat can be used for purposes like heating water.
Wilfykil answered the question on
April 15, 2019 at 07:35