Latent heat storage and heating, solar thermal system and cold storage with a latent heat storage and method for storing and recovering thermal energy

摘要

Latent heat store (20) for storing thermal energy in an energy-storing phase change material ePCM (50), comprising: a container (22) for receiving the energy-storing phase change material (50), a first heat exchanger (26), which is on a first side of the container (22) is arranged, with a first inlet and outlet (28, 30) for a first heat transfer medium, a second heat exchanger (32) which is arranged on a second side of the container (22), with a second inlet and outlet (34, 36) for a second heat transfer medium, a phase-changing heat transport material pWTM (38, 40) arranged in the container (22) for transferring the thermal energy from the first heat exchanger (26) to the energy-storing phase change material (50) and / or from the energy-storing phase change material (50 ) to the second heat exchanger (32), an evacuation device for setting the boiling and condensation point of the phase-changing transport material rials, by adjusting the internal pressure of the container (22) and thus the vapor pressure of the phase-changing heat transport material, the boiling point or the condensation point of the phase-changing heat transport material (38, 40) being set in the container (22) by means of the evacuation device in such a way that the heat transfer from the first heat exchanger (26) into the phase-changing heat transport material (38, 40) charges the phase-changing heat transport material (38, 40) from the liquid to the gaseous aggregate state and the phase-changing heat transport material (38, 40) independently in the charged state the distance between the bridges the first heat exchanger (26) and the energy-storing phase change material (50) and that the heat extraction from the phase-changing heat transport material (38, 40) into the second heat exchanger (32) discharges the phase-changing heat transport material (38, 40) from the gaseous to the liquid state and the phase-changing heat transport material (38, 40) independently bridges the distance between the second heat exchanger (32) and the energy-storing phase change material (50) in the discharged state.