IMPROVEMENTS IN OR RELATING TO ELECTRICALLY HEATED HEAT-STORAGE UNITS

摘要

1279668 Thermal storage heaters IDEALSTANDARD Ltd 14 Nov 1969 [19 Nov 1968] 55985/69 Heading F4U Protective tubes for electric heating elements pass through, and are anchored to the ends of, cylindrical containers for heat storage material. The material may be sodium hydroxide. As illustrated, three protective tubes 3 and four heat extracting tubes 4 are uniformly arranged in a cylinder 1. Water is passed through the tubes 4 from a header 7 to be vaporized and subsequently condensed in a heat exchanger 6 to heat the circulating fluid of a central heating system. The header 7 is connected to an expansion tank by a line 10 and is large enough to accommodate any excess steam formed by overheating without allowing overflow to the expansion tank. In a modification, Fig. 3 (not shown), the tubes 4 are replaced by a jacket which surrounds at least the sides of the storage material container.