Tanque de almacenamiento térmico de un fluido presurizado y su procedimiento de construcción

Tank for the thermal storage of a pressurized fluid and method for the construction thereof, the fluid being a gas or liquid at high pressures and temperatures, which comprises an external layer (1) of high-strength post-tensioned concrete, and an intermediate layer (2) of post-tensioned refractory concrete that acts as a thermal barrier between the fluid/gas and the post-tensioned concrete (1), and in which the concrete is post-tensioned using a system of steel tendons (6) with anchoring heads (7), the tendons having one or more post-tensioning cables (12) anchored at the ends thereof to the concrete and tensioned by hydraulic means, and by anchoring plates (14), sheaths (10), trumpets (13) and wedges. The vapour storage tank may have an intermediate layer composed of a metal layer (11) that prevents permeability of the fluid through the concrete layers.