JP2016033434A5 - - Google Patents

Description

A chemical heat storage device according to one aspect of the present invention is a chemical heat storage device that heats an object to be heated, and includes a heat storage material that reversibly generates heat due to a chemical reaction with a reaction medium and desorption of the reaction medium due to heat storage. A heater provided inside the casing, a reservoir for storing the reaction medium, and a connecting pipe for allowing the reaction medium to flow between the heater and the reservoir, and the heat storage material transfer heat to the object to be heated. The heater is divided into a plurality of layers along the heat direction, and the heater diffuses the reaction medium introduced from the reaction medium introduction port into at least one reaction medium introduction port connected to the connecting pipe and forms a heat storage material. A porous body to be supplied, and at least one internal channel for allowing the reaction medium to circulate, and the heat storage material includes an inner peripheral layer relatively far from the reaction medium inlet along the heat transfer direction, and a heat transfer direction. Along the outer circumference side relatively close to the reaction medium inlet And a layer, a porous body, a first porous body disposed between the inner peripheral side of the layer and the outer layer adjacent the heat storage material disposed in a plurality of layers along the heat transfer direction The internal flow path connects the reaction medium introduction port and the first porous body.

This chemical heat storage device includes a heater disposed at a location where the object to be heated can be heated and a reservoir disposed at other locations, and the heater and the reservoir are connected by a connecting pipe. The storage medium stores the reaction medium, and supplies the reaction medium to the heater through the connecting pipe when heating of the object to be heated is necessary. The heater has a heat storage material inside the casing, and when the reaction medium is introduced from the reaction medium introduction port connected to one end of the connecting pipe, the heat storage material and the reaction medium react chemically to generate heat. And the object to be heated is heated. In particular, in the heater, the heat storage material is arranged in a plurality of layers along the heat transfer direction for transferring heat to the object to be heated. Since the heat storage material of each layer has a predetermined thickness, the thickness of the heat storage material as a whole composed of a plurality of layers is increased according to the number of layers, and the amount of the heat storage material mounted is increased. The heater is provided with a porous body that diffuses the reaction medium introduced from the reaction medium inlet and supplies the diffused reaction medium to the heat storage material. The porous body has a large number of holes through which the reaction medium can flow, and becomes a path through which the reaction medium flows. The porous body has a first porous body. A 1st porous body is arrange | positioned between the thermal storage material of the adjacent inner peripheral layer, and the thermal storage material of an outer peripheral layer with respect to the thermal storage material arrange | positioned in multiple layers along the heat transfer direction. Is done. The heater is provided with at least one internal flow path that connects the reaction medium introduction port and the first porous body so that the reaction medium can flow. Therefore, when the reaction medium is introduced into the heater from the reaction medium introduction port, the reaction medium can be circulated from the reaction medium introduction port to the first porous body by the internal flow path. Further, by diffusing the reaction medium between the heat storage material of the inner circumference side of the layer heat storage material and the outer layers of the first porous body, the heat storage of the inner circumference side of the layer heat storage material and the outer layer of A reaction medium can be supplied to each of the materials. Thus, it is possible to also heat storage material of the inner peripheral side of the layer is a portion far from the reaction medium inlet of the heat storage material accommodated in the casing inside the heater to rapidly provide the reaction medium, the inner peripheral The heat storage material of the side layer rapidly reacts with the reaction medium and expands without reducing the reactivity. Further, since the reaction medium also heat storage material is introduced from the reaction medium inlet portions at which the outer peripheral side of the layer close to the reaction medium inlet is diffused directly, the heat storage material of the outer peripheral side of the layers, rapidly and the reaction medium It reacts and expands. Therefore, the volume of the heat storage material in the outer peripheral layer near the reaction medium introduction port and the heat storage material in the inner peripheral layer far from the reaction medium introduction port expand substantially uniformly. The state in which the heat storage material of each layer is almost uniformly volume-expanded is maintained even after the reaction medium is desorbed, and the pressure by the heat storage material of each layer that has been substantially uniformly volume-expanded is almost uniformly applied to the periphery. Therefore, it is possible to avoid a state in which the heat storage material in the inner peripheral layer far from the reaction medium inlet is pressed by the pressure due to the volume expansion of the heat storage material in the closer outer peripheral layer , and suppress the decrease in reactivity. it can. As described above, the chemical heat storage device provides the first porous body between the heat storage materials of each layer even when the amount of the heat storage material mounted on the heater is increased by laminating the heat storage materials in a plurality of layers. In addition, by providing an internal flow path for circulating the reaction medium introduced from the reaction medium introduction port to the first porous body, among the heat storage materials formed in a plurality of layers, particularly from the reaction medium introduction port It is possible to suppress a decrease in reactivity in the far inner layer , and as a result, the entire heat storage material can be uniformly chemically reacted with the reaction medium to efficiently extract heat.

Claims (5)

A chemical heat storage device for heating an object to be heated,
A heater having a heat storage material inside the casing for reversibly performing heat generation due to a chemical reaction with the reaction medium and desorption of the reaction medium due to heat storage;
A reservoir for storing the reaction medium;
A connecting pipe for circulating the reaction medium between the heater and the reservoir;
With
The heat storage material is arranged in a plurality of layers along a heat transfer direction that transfers heat to the heating object,
The heater includes at least one reaction medium introduction port connected to the connection pipe, a porous body that diffuses the reaction medium introduced from the reaction medium introduction port and supplies the reaction medium to the heat storage material, and the reaction medium And at least one internal flow path for circulating
The heat storage material includes an inner peripheral layer relatively far from the reaction medium inlet along the heat transfer direction, and an outer peripheral layer relatively closer from the reaction medium inlet along the heat transfer direction. And
The porous body includes a first porous body disposed between the adjacent inner peripheral layer and the outer peripheral layer in the heat storage material disposed in a plurality of layers along the heat transfer direction. Have
The internal flow path is a chemical heat storage device that connects the reaction medium introduction port and the first porous body.   The chemical heat storage device according to claim 1, wherein the porous body has a second porous body disposed in the internal flow path.   The said porous body has a 3rd porous body arrange | positioned between the inner peripheral surface of the said casing provided with the said reaction medium inlet, and the layer of the said thermal storage material adjacent to the said casing. The chemical heat storage device according to claim 2.   The porous body has at least one fourth porous body having one end connected to the first porous body and extending from the first porous body toward the heated object. The chemical heat storage device according to any one of claims 1 to 3.   5. The porous body according to claim 1, wherein the porous body has a porosity of 10% or more and an average pore diameter of 150 μm or less in a state of receiving pressure from the heat storage material expanded by a chemical reaction with the reaction medium. The chemical heat storage device according to one item.