Heat storage cell comprises a container, in which a phase change material is arranged, and a graphite disc arranged in the container, where the graphite disc has a disc plain and edges and has a heat conductivity

摘要

The heat storage cell comprises a container, in which a phase change material is arranged, and a graphite disc arranged in the container. The graphite disc possesses a disc plain and edges and has heat conductivity in the direction of the disc plain and heat conductivity in the direction vertically to the disc plain. The graphite disc has anisotropy of the heat conductivity based on its structure and production. The heat conductivity in the direction of the disc plain is greater than heat conductivity in the direction vertically to the disc plain. The heat storage cell comprises a container, in which a phase change material is arranged, and a graphite disc arranged in the container. The graphite disc possesses a disc plain and edges and has heat conductivity in the direction of the disc plain and heat conductivity in the direction vertically to the disc plain. The graphite disc has anisotropy of the heat conductivity based on its structure and production. The heat conductivity in the direction of the disc plain is greater than heat conductivity in the direction vertically to the disc plain. The graphite discs exist in contact with the phase change materials and extend itself through the container and the edges of the graphite disc are arranged near to the container wall. The phase change material is organic substance with high melting enthalpy. The phase change material is paraffin and the volume ratio between the phase change material and graphite disc is greater than 15:1. The thickness of the graphite disc is 0.5-1.5 mm.