The Lorentz energy cycle components are calculated from numerically simulated data on the Black Sea dynamics for three regimes: climatic circulation, basin-scale (2011), and eddy (2016) circulations. The some common features have been found between climatic and realistic energy. The mean annual conversion of energy from mean motion to eddy motion is observed for all circulation regimes. The annual mean buoyancy work increases the mean current for all experiments, which indicates that the slope of the isopycnal surfaces remains such that the condition for converting the available potential energy into kinetic energy is realized. The qualitative difference is that the conversion of eddy kinetic energy into available potential energy is observed only for climatic circulation. For basin-scale circulation, the variability of the eddy kinetic energy is determined by the flux formed by the transformation of kinetic energy due to the barotropic instability of the mean current. For the eddy regime, the growth in the eddy kinetic energy is a result of the available potential energy conversion into kinetic energy due to baroclinic instability. The circulation regime, as well as the qualitative and quantitative difference in the magnitudes and directions of energy conversion, are primarily associated with atmospheric forcing.