Understanding Sankey Diagrams

This video tutorial explains how to draw a perfect Sankey diagram in five steps. It begins with an introduction to the components of a Sankey diagram, including input energy, wasted energy, and useful energy. The tutorial then provides a practical example using a kettle's energy transfer, detailing how to represent the energy flow. The five steps to drawing a Sankey diagram are outlined: deciding on scales, plotting input energy, plotting wasted energy, plotting useful energy, and adding labels. The video concludes with a summary of these steps.

What is the main purpose of this video?

• To explain the history of Sankey diagrams

• To teach how to draw a perfect Sankey diagram

• To discuss the advantages of Sankey diagrams

• To compare different types of energy diagrams

Which component of a Sankey diagram represents the energy being put into the system?

• Output energy

• Input energy

• Useful energy

• Wasted energy

In the kettle example, how much electrical energy is transferred?

• 200 Joules

• 800 Joules

• 1000 Joules

• 600 Joules

What is the first step in drawing a Sankey diagram?

• Decide on the scales

• Add labels

• Plot the input energy

• Plot the wasted energy

How many squares represent 800 Joules of input energy in the example?

• 8 squares

• 4 squares

• 6 squares

• 10 squares

What direction do the arrows for wasted energy point in a Sankey diagram?

• To the right

• To the left

• Upwards

• Downwards

How many squares represent the useful energy output of 600 Joules?

• 4 squares

• 7 squares

• 5 squares

• 6 squares

What is the final step in completing a Sankey diagram?

• Plot the input energy

• Plot the useful energy

• Add labels

• Decide on scales

What is the purpose of adding labels to a Sankey diagram?

• To make it colorful

• To identify different energy types

• To reduce the size of the diagram

• To increase complexity

Which of the following is NOT a step in drawing a Sankey diagram?

• Decide on scales

• Plot the input energy

• Add labels

• Calculate energy efficiency