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- W2183522982 abstract "Predictions of power plant efficiency improvement due to machinery repair, modification, replacements, or new desig n can be made by way of mathematical models (What If). No such model can solve the converse question of finding root-causes of efficiency variations of an existing plant. Here it is demons trated how these can be found automatically. A natural extension of diagnostics is the finding of values for available set-point s which maximize thermal efficiency - a decades-old quest. The solut ion is demonstrated for a steam-turbine coal fired plant. Method of approach. The facilitating underlining physics are the Balance Equations and the additivity of entropy. These yield thermodynamic availability with no further definitions and assu mption. The automatic maximization of thermal efficiency is ti ed to the geometrical formulation of thermodynamics, which is briefly discussed. Results. The example of automatic diagnostics was recorded on line under routine running of a Combined Cycle plant. The example shows graphics of automated diagnostics of efficiency drop, and remedy action. In passing a natural way t o normalize thermal efficiency against variable environment is devised. Another example shows a 4% gain in efficiency recorded during the maximization tests. The analysis of the gains provides a quantitative proof of why a generic efficiency maximi zing set of fixed values for set-points (which is the entrenche d conventions) does not exist. Conclusions. Remedies following real-time automatic diagnostics can improve plant thermal performance in a measurable way mostly at no capital cost. Efficiency maximization can be fully automated by integrating the tuning algorithm into plant’s controls. Even if controllab le parameters are set manually 1% improvement is achievable." @default.
- W2183522982 created "2016-06-24" @default.
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- W2183522982 date "2013-01-01" @default.
- W2183522982 modified "2023-09-27" @default.
- W2183522982 title "ON THE ADDITIVITY OF ENTROPY, THE GEOMETRY OF THERMODYNAMICS, AND THE MAXIMIZING OF POWER-PLANT THERMAL EFFICIENCY AT NO COST. JOINT VENTURE WITH IGNS LTD, NEW-ZEALAND" @default.
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