Heat storage device and heat storage module including the same

A heat storage module comprising:

• a heat storage device comprising:
• a heat storage material that absorbs or releases latent heat with a phase transition between a liquid phase and a solid phase;
• and
• a heat conduction member that includes a contact surface contacting the heat storage material, the heat conduction member having a thermal conductivity higher than a thermal conductivity of the heat storage material, the contact surface including an upstream region and a downstream region that is located at a downstream side of the upstream region in a flowing direction of a heat medium, a wettability of the contact surface with respect to the heat storage material being higher in the downstream region than in the upstream region,
• wherein the contact surface includes a central region and a pair of end regions opposing each other across the central region in a short-length direction of the contact surface, and
• the wettability of the contact surface with respect to the heat storage material is further higher in the central region than in the pair of end regions;
• and
• a housing that contains the heat storage material and the heat conduction member, the housing including an inlet, through which the heat medium flows into the housing, and an outlet, through which the heat medium flows out of the housing.

A heat storage device for use by being immersed in a heat medium that flows from upstream to downstream, the heat storage device comprising:

• a heat storage material that absorbs or releases latent heat with a phase transition between a liquid phase and a solid phase;
• and
• a heat conduction member that includes a contact surface contacting the heat storage material, the heat conduction member having a thermal conductivity higher than a thermal conductivity of the heat storage material, the contact surface including an upstream region and a downstream region that is located at a downstream side of the upstream region in a flowing direction of the heat medium, a wettability of the contact surface with respect to the heat storage material being higher in the downstream region than in the upstream region,
• wherein the wettability of the contact surface with respect to the heat storage material is further higher in a direction perpendicular to the flowing direction than in the flowing direction.

A heat storage module comprising:

• a heat storage device comprising:
• a heat storage material that absorbs or releases latent heat with a phase transition between a liquid phase and a solid phase;
• and
• a heat conduction member that includes a contact surface contacting the heat storage material, the heat conduction member having a thermal conductivity higher than a thermal conductivity of the heat storage material, the contact surface including an upstream region and a downstream region that is located at a downstream side of the upstream region in a flowing direction of a heat medium, a wettability of the contact surface with respect to the heat storage material being higher in the downstream region than in the upstream region,
• wherein the wettability of the contact surface with respect to the heat storage material is further higher in a direction perpendicular to the flowing direction than in the flowing direction;
• and
• a housing that contains the heat storage material and the heat conduction member, the housing including an inlet, through which the heat medium flows into the housing, and an outlet, through which the heat medium flows out of the housing.