System and method for thermochemical storage of energy
A heat exchanger system is described for thermochemical storage and release. The system comprises a thermal exchange circuit with a heat exchanger fluid, the circuit further in thermal connection with a thermochemical module. The thermochemical module comprises a thermochemical material that stores and releases heat by a thermochemical exchange process under release or binding of a sorbate. The thermochemical module comprises a compartment structure that compartments the thermochemical material and further comprises a channel structure. This provides an exchange of the sorbate and the thermochemical material via the channel structure to the compartment structure.
1. A heat exchanger system for thermochemical storage and release, comprising a thermal exchange circuit formed by circuit walls with a heat exchanger fluid, the circuit further in thermal connection with a thermochemical module, the thermochemical module comprising:
a thermochemical material that stores and releases heat by a thermochemical exchange process under release or binding of a sorbate,
a multitude of largely parallel oriented fibers, and
a planar structure of thermoconductive strips that is connected to the thermal exchange circuit and that extends between the fibers and the circuit walls and that thermomechanically connect the circuit walls to the thermochemical material,
wherein each of the fibers comprise a microporous wall, the multitude of largely parallel oriented fibers defining a plurality of first channels that comprises the thermochemical material that stores and releases heat by a thermochemical exchange process under release or binding of a sorbate, and
wherein a multitude of second channels is formed, in the complementary space between the fibers, to provide an exchange of the sorbate to the thermochemical material via the microporous wall, said second channels connected to an exhaust, said thermoconductive strips traversing the structure of second channels.
2. The heat exchanger system according to claim 1 , wherein the channel wall structure comprises a polymeric material selected from the group consisting of: polyacrylate, polymethacrylate, polyvinylpyrrolidone, polyurethanes, polyepoxides poly(ethyl)methacrylate, poly(isoprene), polysiloxane (vulcanized), cellulose, cellulose derivative, poly(oxy-2,6-dimethyl-1,4-phenylene), polystyrene, polyacrylonitrile, a copolymer of these polymeric materials, and a mixture of these polymeric materials.
3. The heat exchanger system according to claim 2 , wherein the cellulose derivative is selected from the group consisting of: cellulose, methylcellulose, ethylcellulose, cellulose acetate, and cellulose nitrate.
4. The heat exchanger system according to claim 1 , wherein the strips are reinforced by thickened reinforcements that allow passage of the thermochemical exchange circuit and the first and second channel wall.
5. The heat exchanger system according to claim 4 , wherein the reinforcements are annular in form.
6. The heat exchanger system according to claim 1 , wherein the thermochemical module is formed by multicomponent additive manufacturing process.
7. The heat exchanger system according to claim 1 , wherein the thermochemical material is selected from the group consisting of: zeolites, silica gel, hygroscopic salts, metal organic frameworks (MOF), carbon, and aluminum phosphates and their hydrates.
8. The heat exchanger system according to claim 7 , wherein the hygroscopic salt is selected from the group consisting of: chlorides, sulfates, phosphates, bromides, iodides, nitrates, sulfides and their hydrates.
9. The heat exchanger system according to claim 1 , wherein the sorbate comprises water, NH 3 , CH 3 OH, or C 2 H 5 OH.