Main recommendations for the calculation of regenerators of a NPP with dissociating coolants

The methods of experimental data reduction on heat transfer while cooling chemically reacting N2O4 are compared at high wall-temperatures, T > 450 K, and lower temperatures. Specific experimental conditions were taken that had close values of gas temperatures at the inlet and substantially different pressures and the residence time of the coolant in a tube. The analysis of thermodynamic schemes and cycles of a NPP with the N2O4 chemically reacting coolant shows that the cooling of the N2O4 reversible 2NO2 reversible 2NO + O2 system at a high wall temperature may be realized in high-temperature superheaters of NPP. The thermal calculation of a heat exchanger with the N2O4 chemically reacting coolant was performed in steps on a computer, i.e. using local temperature heads and heat transfer coefficients. It is due to the fact, that the main characteristics affecting heat transfer, show a substantial nonlinear change over the heat exchanger length. The discussed results of heat transfer investigation while cooling by N2O4 may be recommended for thermal calculations of NPP regenerators, using the N2O4 coolant, and those obtained on hydraulic resistance of N2O4 in the presence of heat transfer may be used in calculations of hydraulic resistance of circuits and seprate instruments of NPP