  In this paper, we investigate the energy partition of two homologous M1.1
circular-ribbon flares (CRFs) in active region (AR) 12434. They were observed
by \textit{SDO}, \textit{GOES}, and \textit{RHESSI} on 2015 October 15 and 16,
respectively. The peak thermal energy, nonthermal energy of flare-accelerated
electrons, total radiative loss of hot plasma, and radiant energies in 1$-$8
{\AA} and 1$-$70 {\AA} of the flares are calculated. The two flares have
similar energetics. The peak thermal energies are
(1.94$\pm$0.13)$\times$10$^{30}$ erg. The nonthermal energies in
flare-accelerated electrons are (3.9$\pm$0.7)$\times$10$^{30}$ erg. The
radiative outputs of the flare loops in 1$-$70 {\AA}, which are $\sim$200 times
greater than the outputs in 1$-$8 {\AA}, account for $\sim$62.5\% of the peak
thermal energies. The radiative losses of SXR-emitting plasma are one order of
magnitude lower than the peak thermal energies. Therefore, the total heating
requirements of flare loops including radiative loss are
(2.1$\pm$0.1)$\times$10$^{30}$ erg, which could sufficiently be supplied by
nonthermal electrons.
