Improved latent heat storage device

Abstract

A rapid absorption and extraction latent heat storage device according to the invention comprises a means (1) for containing at least one phase change material (2) within a containment vessel (3), the containment vessel forming a supporting structural exoskeleton. The containment means (1) is in the form of rods or tubes, which are made out of elastomeric material (4) containing the PCM (2). A heat exchange fluid (6) flows between and along the length of the rods (1).

Description

technical field [0001] The present invention relates to efficient thermal energy storage devices capable of rapid absorption and extraction. Background technique [0002] In recent years there has been an increasing need to store energy, usually electricity. With the present invention it is now possible to efficiently store thermal energy which can be used for power generation, cooling, heating or for any purpose at a later date. [0003] There have been several inventions (eg WO8900670, Whitman) showing various methods of using phase change materials (PCMs) to store thermal energy, but they all have fundamental problems. For the wax variety of PCM, the main problem centers on its poor thermal conductivity and relatively large coefficient of thermal expansion. [0004] Thermal conductivity is significantly better for eutectic and hydrated salt type PCMs, but corrosion can become a major problem. All current PCMs have problems with expansion and contraction, which makes th...

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Problems solved by technology

Alternatively, putting the PCM in the tube can be an improvement, but the ends of the tube must be sealed, allow for thermal expansion, etc.

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