The Brayton Cycle and Entropy Nature at the Space Thermostat Presence

The paper analyzes Brayton’s cycle and entropy nature at the space thermostat presence. The considered external thermostat fulfills near Earth and air spaces with the temperature T0=2.73 K. Any studied natural or technical systems have closed heat contact with the space thermostat and some part of the system energy is dissipated into its. Additional peculiarities of Brayton’s cycle for jet propulsions are detail considered. At the space thermostat presence the entropy nature may be clearly demonstrated and estimated. In particular, entropy growth correspond total pressure losses and energy dissipation in the external space thermostat.