Résumé

In this article the development of a high performance, double-wall vacuum insulated thermal energy storage for high temperature applications is presented. In this concept, the main heat losses of the tank are limited to radiation and to the thermal bridges present in the wall of the tank and fittings. This concept is well suited for high temperature applications such as those found in the industrial sector where storage energy losses are an important issue. Few studies on double wall evacuated tanks were found in the open literature and none employed a completely evacuated gap as proposed in this study. A structural analysis was performed to validate the proposed design and ensure conformity to high temperature applications. Preliminary heat transfer calculations assessed the impact of low emissivity coatings on the radiative heat transport in the evacuated gap. A numerical model of the container was developed and the thermal behaviour investigated under different operating conditions.

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