Energy Flow Diagram, Electrical to Mechanical Conversion (Taking a Case of Water Pump)
In such electrical to mechanical conversion, there are various stages where power is lost (losses).
Losses
- Motor losses say 10 %
- Coupling losses say 1%
- Pump losses say 24%
- Valve losses say 8%
- Pipe losses, say 12 % /55%
Summing up
Input 100% -losses 55% = useful output only 45%.
This is shown by the following Sankey diagram Figure A.
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| Figure A |
Input – Losses = Useful output
100% – 55% =45%
- From such Sankey diagram, internal distribution of energy to final consumption can be easily understood and can be studied.
- From such diagrams, experts can decide the priorities to be given for improvement findings.
- Note : Such diagrams should be drawn in proportion it for losses in the above diagram shall be shown by proper thickness (portions) small strip shows 1%, medium sized strip shows 8% like this.
- By studying this diagram, the inefficiency present in the pump and loss-reduction methods can be employed to increase efficiency.
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| Figure B |