FIELD: heating system.
SUBSTANCE: invention relates to a thermal energy storage system comprising an energy accumulator (2) having a vertical temperature gradient and an internal combined refrigeration-heating machine (15). This machine is adapted to deduce the energy corresponding to the first temperature from the energy accumulator with the simultaneous return of energy corresponding to, after heating, the second higher temperature and the energy corresponding to, after cooling, the third, lower temperature. The invention also relates to a method for using thermal energy storage system.
EFFECT: improvement of a system.
10 cl, 1 dwg
