FAST AND EXACT CALCULATION OF THE EFFICIENCY OF COMBUSTION PROCESSES
Combustion processes are a basis for modern industry and can be found in a multitude of branches. Combustion engineering plays a major role in energy production by oil, coal, domestic gas and biogas. Knowledge about the process efficiencies is important to precisely predict the performance of turbines and engines. First software to calculate these processes was developed in the early 1960s. The regime of pressure and temperature at which engines and turbines work have changed in the meantime. To take the new working regimes into account it is necessary to question earlier assumptions and to repla- ce the calculation methods by new ones.
Today commercial software for process simulation already takes temperature-dependent caloric entities into account. In the calculation of the performance of turbines uncertainties in the results originate partly in the calculations themselves. These uncertainties need to be considered in the power rating.
The invention discloses a procedure to accurately assess the caloric entities in an adiabatic expansion and compression process of gases and gas mixtures. The dependence of both the pressure and the temperature is explicitly taken into account for the first time. This leads to the elimination of one of the major sources of error in the calculation of caloric states. The improved calculation of the caloric states in combustion processes allows for a better knowledge on process efficiencies.
- More precise specifications for turbine, gasification and compressor performance.
- Higher precision on performance assessments allows for optimised combustion processes and allows for a more accurate declaration of guaranteed performances. Also the comparability on performance calculations is significantly improved.
- Accurate calculation of the effiencies of processes and components to minimize uncertainties.
The calculation of relevant processes is tested and reliable. Software for demonstration purposes and for further validation is available. The process can be integrated on a multitude of programming plat- forms.
Joule process in p,V and T,S-diagrams
(1) DE 10 2013 101 028