Talk:Power loss factor
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Interpretation of the power loss factor[edit]
Basically, the β is the efficiency of the low pressure turbine plus the efficiency of the electric generator. The efficiency of the LP turbine is the Carnot factor η_c multiplied with a performance factor of the energy conversion ν (nu).
- η_LPT = ν*η_c = ν*(1-Ti/Ts) , with Ti = inferior temperatur , Ts = superior temperature, ν = performance factor
- β = η_LPT * η_GEN , multiplying the efficiency of the generator with the efficiency of the LP turbine
The older the plant design, the lower is the power loss as η_GEN may be not so fine-tuned as today, and the ν was also worse. As the low pressure turbine and the generator had lower efficiencies, it was even more helpful not to expand all of the LP steam (at a lower electrical efficiency than today) but to use the LP steam to serve a district heating network. The technology 100 years ago used steam networks, today hot water is prefered. By lowering the forward flow temperature of the useful heat (Ts), the power loss factor could be further decreased. --Gunnar (talk) 06:36, 26 July 2018 (UTC)
Figure of heat extraction principle[edit]
I just linked the figure from the DE-wiki article, which has a German legend. I will modify the diagram and use English lettering in the next days. --Gunnar (talk) 06:36, 26 July 2018 (UTC)