  We establish a close analogy between the thermodynamics of the nonlinear
systems far from equilibrium and the dissipative solitons. Unlike the solitons
in the Hamiltonian systems, their dissipative counterpart looks like an
aggregation of bounded quasi-particles interacting on the short range, obeying
the Rayleigh-Jeans distribution, and possessing a temperature, entropy, and
other thermodynamic characteristics. This ensemble is confined by a collective
potential, which defines its negative chemical potential. Such a dissipative
soliton represents a strongly chirped pulse generated by a mode-locked laser
with the advantage of being energy scalable by the analogy with the
Bose-Einstein condensation from an incoherent ``basin.'' We demonstrate the
main limits of the dissipative soliton energy scaling which result from the
loss of internal soliton coherency and the thermalization due to nontriviality
of a ``free energy landscape.''
