Combined heat and power CHP plants This Power
Combined heat and power (CHP) plants This Power. Point presentation has been downloaded from www. onestopenglish. com. Presentation written by John Clegg. © Copyright Springer Nature Ltd 2018. Animation licensed from The Science Museum.
First … 1. Do exercise 1 on the worksheet: look at the diagram and write sentences, using the prompts. 2. Discuss in your group: does burning biomass in a CHP plant add to climate change?
Next 3. Look at the following picture slides and check your answers to exercise 1 on the worksheet. Does burning biomass in a CHP plant add to climate change?
As trees and plants grow they absorb carbon dioxide from the air.
When they reach the right size the trees and plants are harvested and chopped up.
It is now called biomass.
The biomass is taken to a type of power station called a combined heat and power plant, or CHP plant for short.
The biomass is heated at very high temperatures and heats water to make steam, which is then used to make turbines spin.
As the turbines spin they drive generators, which make electricity.
Electricity is sent via cables to homes.
But the precious energy left in the steam isn’t wasted. Instead of being allowed to escape, when the steam comes out of the turbine it is run out of pipes and is used for heating – often in the building that houses the CHP plant.
Burning biomass releases carbon dioxide. But growing new trees absorbs carbon dioxide. So as long as we keep growing new trees to replace those turned into biomass, this fuel does not add to climate change.
Now … 4. Do exercise 2 on the worksheet: join the words. 5. Do exercise 3 on the worksheet: match the pictures with the correct sentence.
Presentation (for classes working in groups only) 6. Give an oral commentary on the picture slides.
- Slides: 14