Thermal energy storage system combining sensible heat solid material and phase change material

摘要

The invention relates to a system for the storage and recovery of thermal energy, using, as its medium, at least one phase change material (solid-liquid) and a sensible heat solid material for storing/recovering the heat obtained from an external source in the form of phase change latent heat and sensible heat. The aforementioned materials are duly housed inside a single tank containing at least two zones which are differentiated by the range of temperatures to which they are subjected, each zone containing a different material. The most common configuration consists of three different zones located inside the tank, namely: a hot zone in the upper part of the tank, enclosing an encapsulated phase change material characterised by a high melting temperature; a cold zone housed in the lower part of the tank, containing a phase change material with a low melting temperature; and a middle zone containing a sensible heat solid material.

主权项

1. Thermal energy storage system combining sensible heat solid material and phase change material that is used in order to store thermal energy obtained from an external source over a period of time and then recovering some of this energy and carrying it towards an external consumption unit that might need it, the thermal energy storage system being formed by:
a cavity or tank (2), which function is to contain the filling materials (8) and (9), and the heat carrier fluid (10); at least one group of encapsulated phase change materials (9); at least one heat sensible solid material (8) which is located in the middle zone of the storage tank (2) or in the top or bottom zone; and at least a pair of entrance and exit inlets (11) and (12) of the storage tank (2) for the entry and exit of the heat carrier fluid (10).