Neutrino emission power density as function of mass density at ages 50 yr (upper curves) and 5 kyr (lower curves of each type) for different neutron star models: the basic model (EoS BSk24, ground state composition, M = 1.4 M_⊙, no superfluidity; solid lines), the neutron star with fully accreted envelope (short-dashed lines), three different combinations of the three types of superfluidity (dot-long-dash, dot-short-dash, and dotted curves), and a model without superfluidity but with the direct Urca processes due to the higher mass M = 1.8 M_⊙ (long-dashed lines). The density scale is different in the left and right parts of the figure, separated by the vertical solid line. The vertical dotted lines mark the outer and inner boundaries of the inner crust.