  We have proposed novel calorimetric tunneling (CT) experiment allowing exact
determination of heat generation (or heat sinking) in individual tunnel
junction (TJ) electrodes which opens new possibilities in the field of design
and development of experimental techniques for science and technology. Using
such experiment we have studied the process of heat generation in normal-metal
electrodes of the vacuum-barrier tunnel junction (VBTJ). The results show there
exists dependence of the mutual redistribution of the heat on applied bias
voltage and the direction of tunnel current, although the total heat generated
in tunnel process is equal to Joule heat, as expected. Moreover, presented
study indicates generated heat represents the energy of non-equilibrium
quasiparticles coming from inelastic electron processes accompanying the
process of elastic tunneling.

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