Thermodynamic modeling of power plants based on solid oxide fuel cells

Two-sided estimates for thermal resistance of an inhomogeneous solid body

“…With the use of rather simple temperature dis tributions that are expected and the heat flux density vector, which are allowable for the above described minimizing and maximizing functionals, these esti mates allow one to obtain practically important reli able estimates of the possible interval of variation of thermal resistance influencing on the thermal state of the object. This effect, foremost, must be taken into account in using construction materials with an inho mogeneous structure, to which belong composites, which are widely used in the technique in [19,20] (including heat protection systems [21,22]), as well as in processing experimental measurements of thermo physical characteristics for different heterogeneous media [23][24][25][26][27] and in testing the heat stressed struc tures [28][29][30][31][32][33].…”

Thermodynamic efficiency of water use in a gas turbine cycle

“…It is performed by the standard proposed in [18] as a mandatory part of the thermodynamic model for a power plant and presents a scheme for flows of working fluids, on whose branches the heat sources and sinks and devices for the production and con sumption of work are placed. That the heat sources and sinks are not integrated in one casing not only strongly simplifies the scheme, but also completely corresponds to the concept of an abstract heat exchanger with the possibility for an infinitely small sectioning of the heat exchange surfaces for the pur pose of their optimum arrangement along summed TQ diagrams for the heat sources and sinks.…”