A Sankey chart is a type of flowchart used to visualize the flow of energy or other types of flows, such as material or information. It is named after Dutch graph theorist Leo E. Sankey, who developed the chart in the 1930s.
Sankey charts are useful for tracking the flow of energy or other resources, as well as for identifying bottlenecks or inefficiencies in a system. They can be used to represent a wide range of energy or resource flows, such as natural gas, electricity, water, or even the flow of information.
To create a Sankey chart, the first step is to define the type of flow you want to visualize. For example, you might want to create a Sankey chart to visualize the flow of energy from a power plant to homes or businesses, or the flow of water through a system.
Next, you need to determine the units of measurement for your flow. For example, if you are visualizing the flow of energy, the units might be megawatts or gallons of gas.
Once you have defined the type of flow and the units of measurement, you can begin to create the chart. There are several software programs available that can be used to create Sankey charts, such as Microsoft Excel, Google Sheets, and a variety of specialized charting and visualization tools.
To create a Sankey chart in Excel, for example, you can use the SANKEY函数, which allows you to enter the start and end points of your flow, as well as the values for the nodes (points of flow) along the chart. The SANKEY function also allows you to specify the units of measurement for your flow.
Once the chart is created, you can use it to analyze the flow of energy or other resources in your system. For example, you might use the chart to identify areas where energy is wasted or to track the movement of materials or information.
Overall, Sankey charts can be a powerful tool for visualizing and analyzing the flow of energy or other resources. They can be used to identify areas for improvement and to track the movement of resources over time.
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