Sankey webpage. It shows the energy balance for a pumped storage power plant as a curved shape, with the energy input at the left leg, and the energy that can be recovered Low-cost off-peak electric power is used to run the pumps. During periods of high electrical demand, the stored water is released through turbines.
Although the losses of the pumping process makes the plant a net consumer of energy overall, the system increases revenue by selling more electricity during periods of peak demand, when electricity prices are highest.
Typical use cases for Sankey diagrams are energy flow diagrams and energy efficiency diagrams. The Possibilities Beyond drawing - our vision. It is also summarizes the first two key points of our development and product directives: High graphical quality scalable vector graphics, shapes and icons, effects, etc.
High user efficiency simple graphical user interface, helping lines and magnetic snapping, wizards, etc. Modern, technically and economically web app, cloud based storage, auto revisioning, real-time collaboration, etc. Fairly priced realized on the basis of a high automation ratio Hint: Click at the next picture to open a separate tab with higher resolution.
To calculate the useful electrical energy output to the rheostat and then converted to heat energy by the rheostat use the following formula:.
To calculate the wasted electrical energy converted to heat by the transformer in the power supply use the following formula:. Using a sheet of graph paper and a suitable scale, or a Sankey diagram Drawing software tool , construct a Sankey Diagram of your data.
Use your Sankey Diagram to calculate the efficiency of the power supply on your setting s. Use the formula:. Part of your assessment requires you to use other peoples work, such as adapting standard procedures or finding out and using information on the internet.
When you use information like this you need to reference it properly in your reports. The following link takes you to a suitable method for referencing:. Design, use and apply simple Sankey diagrams to describe energy transfers involved in the process of generation of heat and electricity by carbon-based fossil fuels.
This includes taught time and independent study. The first illustration of energy with arrows proportional to the amount were done by the Irish engineer Captain Matthew Henry Phineas Riall Sankey in He compared the energy efficiency of steam engines. Before that this kind of diagram had been used by the French engineer Charles Joseph Minard to visualize Napoleon's Russian Campaign of Captain Sankey only drew that one chart.
Thus they fell into oblivion over the years. In the 20th century the Austrian mechanical engineer Alois Riedler started to use these flow charts to analyze the power and the energy losses of passenger cars. In the course of this the Sankey diagram gained popularity, especially in Germany, where the economy focused on material and energy efficiency due to the reparation payments after World War I.
Today this kind of chart is used worldwide for data visualization, e. Below you find some examples of several Sankey diagrams. Each diagram was created using our software e! Just try out by yourself, how easy it is, to create appealing Sankey diagrams using e! In this diagram in German you can see the energy balance for a passenger car. Besides the energy actually used for motion at the wheel "mechanische Energie" a large part of the energy is lost, especially as heat losses. Additionally we can identify the additional energy consumers water pump, steering support, etc.
All arrows within the chart can be distinguished by color, and are — by definition — proportional in their width to the flow quantities they represent. In this rather simple chart we can see losses along a process chain for food. So here we have no absolute quantitites although the diagram is based on real data , but only proportions. One could call this the "efficiency" of food production, processing and consumption.
Very often we find diagrams which have a left-to-right orientation just as the reading direction for many, but not all scripts.
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