Abstract: There is provided a method for heat storage comprising charging by raising the temperature of a phase change material (PCM) above its melting temperature and discharging by lowering the temperature below its melting temperature, wherein the phase change material (PCM) is provided in particles (P) comprising a core (CPCM), said core (CPCM) comprising at least one phase change material (PCM), said core (CPCM) being coated with an outer layer (LPSMALL) of smaller particles (PSMALL) comprising at least one from graphite, graphite oxide, graphene, and graphene oxide. The particles (P) can be made smaller giving an efficient heat exchange. Their manufacture is easy and cost efficient. The flexible outer layer allows the core to expand and shrink. Corrosion is prevented allowing less expensive materials to be used in devices. The particles can be made self-lubricating.

Abstract: There is provided a system and a method for transferring energy, the method comprising the steps of: a)feeding a material comprising an absorbed fluid into a tube, b) heating the tube so that the fluid is desorbed in gas phase from the material, so that a fluid flow is created by the desorbed fluid in the tube, causing a flow of the material present as particles, and c) performing one of i) separating the material from the fluid so that a charged material is obtained, and ii)cooling the material and fluid so that the fluid is absorbed by the material whereby heat is released. An advantage is that no active transport means such as pumps are needed to transport the material during charging.

Abstract: There is provided a method of manufacturing a graphene/graphene oxide layer comprising the steps of: providing a suspension of graphene/graphene oxide in a suspension liquid, applying the suspension on a support, heating the suspension and the support to evaporate liquid to form a layer of graphene/graphene oxide on the support, subjecting the graphene/graphene oxide layer and the support to pressure, and subjecting the graphene/graphene oxide layer to annealing process.

Abstract: There is disclosed a heat transferring device comprising a number of spaces and conduits together with heat transferring elements and a heat exchanger as well as a heat source. A capillary tube feeds a heat transferring medium to a space from which is can be evaporated. The invention is highly suitable for all applications where heat is to be transferred from a small volume to a large area. It is also suitable where the same large area needs to be cooled. The energy consumption is reduced compared to more traditional technologies. The number of moving parts is minimized which gives lower costs for use, manufacture, maintenance etc. The invention is very versatile and can be utilized in many different applications where it is desired to transfer heat from one point to a large area. It can also be used for cooling purposes.

Abstract: A heat pipe comprises a condenser, an evaporator, a working fluid, a displacement vessel and at least one connecting pipe. The volume available for the working fluid inside the displacement vessel is adjustable, said volume being adapted to change by a rotating movement of a body. In one embodiment external heat pipes allow several different heat sources to be connected. Advantages include that the capability of transferring heat can be adjusted and fine tuned to the desired value. Less force is required to rotate the body inside the displacement vessel. No energy input is required to hold the body in a desired position. The construction is simple and inexpensive to manufacture. In particular the construction is easy to manufacture in different volumes, since the diameter of the displacement vessel and rotating body can be the same but with a longer displacement vessel.

Abstract: In a chemical heat pump involving a sorption process and a matrix holding an active substance, at least the active substance is in a material comprising graphene and/or graphene oxide. This material is designed to take use of the great energy content in some salts and making the whole range from diluted solutions to solid crystals available. The heat transfer to and from the active substance is improved, the ability of the matrix to hold active substance in liquid state is improved, the mechanical strength of the matrix is improved, power and energy can be varied better according to requirements in a specific application, the system pressure becomes more flexible.

Abstract: There is disclosed an absorption machine comprising at least a first and a second compartment in fluid connection with each other, wherein the first compartment comprises at least one salt selected from the group consisting of LiBr, Lil, LiCl, Nal, and NH4I and wherein at least the first compartment comprises NH3 in an amount sufficient to form a liquid together with the at least one salt in the first compartment. Advantages of using the new mixture include that an absorption machine using a salt and NH3 can be made smaller and lighter with the same power. Further ?T can be improved. The vapour pressure of NH3 in the system can be kept relatively high.

Abstract: A particle comprises an inner part and an outer coating, wherein the inner part comprises MgO and the outer coating comprises hydrophobic nanoparticles, wherein the nanoparticles have an average size of from 1-50 nm and/or the nanoparticles are fused together and form aggregates of 100-1,000 nm of a size less than 1 ?m, wherein the particle has an average size of from 1 to 1000 ?m. A device adapted to perform an absorption process comprises at least one such particle. An absorption process comprises contacting such a particle with a liquid or gas.

Abstract: A particle comprises an inner part and an outer coating. The inner part comprises CaO and the outer coating comprises hydrophobic nanoparticles of a size less than 1 ?m. The particle has an average size of from 1 to 1000 ?m. A device adapted to perform an absorption process comprises at least one such particle. A method for manufacturing such a particle comprises mixing CaO with hydrophobic nanoparticles, and mixing with sufficient energy to obtain particles comprising CaO coated with the hydrophobic nanoparticles.

Abstract: A salt or CaO coated with hydrophobic nanoparticles comprises an inner part and an outer coating, forming a particle with a permeable membrane keeping liquid inside and letting gas pass. Said inner part comprises at least one selected from a salt and CaO and said outer coating comprises hydrophobic nanoparticles. Known machines and processes can get enhanced functionality the particles comprising salt and nanoparticles. For machines working according to matrix and hybrid principles the particles can act as a matrix, thereby substituting expensive matrix material. Further applications include storage of chemical energy. A device is adapted to perform an absorption process, said device comprising at least one particle. Advantages include that corrosion is reduced or even eliminated. The long term stability of absorption machines is increased and migration of salt in liquid and gas phase is avoided.

Abstract: A particle comprises an inner part and an outer coating. The inner part comprises CaO and the outer coating comprises hydrophobic nanoparticles of a size less than 1 ?m. The particle has an average size of from 1 to 1000 ?m. A device adapted to perform an absorption process comprises at least one such particle. A method for manufacturing such a particle comprises mixing CaO with hydrophobic nanoparticles, and mixing with sufficient energy to obtain particles comprising CaO coated with the hydrophobic nanoparticles.

Abstract: A heat pipe comprises a condenser, an evaporator, a working fluid, a displacement vessel and at least one connecting pipe. The volume available for the working fluid inside the displacement vessel is adjustable, said volume being adapted to change by a rotating movement of a body. In one embodiment external heat pipes allow several different heat sources to be connected. Advantages include that the capability of transferring heat can be adjusted and fine tuned to the desired value. Less force is required to rotate the body inside the displacement vessel. No energy input is required to hold the body in a desired position. The construction is simple and inexpensive to manufacture. In particular the construction is easy to manufacture in different volumes, since the diameter of the displacement vessel and rotating body can be the same but with a longer displacement vessel.

Abstract: A chemical heat pump includes a reactor part (1) that contains an active substance and an evaporator/condenser part (3) that contains that portion of volatile liquid that exists in a condensed state and can be absorbed by the active substance. A channel (4) interconnects the reactor part and the evaporator/condenser part, In at least the reactor part a matrix (13) is provided for the active substance so that the active substance both in its solid state and its liquid state or its solution phase is held or carried by or bonded to the matrix. The matrix is advantageously an inert material such as aluminum oxide and has pores, which are permeable for the volatile liquid and in which the active substance is located. In particular, a material can be used that has a surface or surfaces, at which the active substance can be bonded in the liquid state thereof. For example, the matrix can be a material comprising separate particles such as a powder or a compressed fiber material.

Abstract: A salt or CaO coated with hydrophobic nanoparticles comprises an inner part and an outer coating, forming a particle with a permeable membrane keeping liquid inside and letting gas pass. Said inner part comprises at least one selected from a salt and CaO and said outer coating comprises hydrophobic nanoparticles. Known machines and processes can get enhanced functionality the particles comprising salt and nanoparticles. For machines working according to matrix and hybrid principles the particles can act as a matrix, thereby substituting expensive matrix material. Further applications include storage of chemical energy. A device is adapted to perform an absorption process, said device comprising at least one particle. Advantages include that corrosion is reduced or even eliminated. The long term stability of absorption machines is increased and migration of salt in liquid and gas phase is avoided.

Abstract: A chemical heat pump includes a reactor part (1) that contains an active substance and an evaporator/condenser part (3) that contains that portion of volatile liquid that exists in a condensed state and can be absorbed by the active substance. A channel (4) interconnects the reactor part and the evaporator/condenser part. To heat the reactor part, a portion of this wall is arranged as a solar energy collector, which can result in a very compact structure. In at least the reactor part a matrix (13) is provided for the active substance so that the active substance both in its solid state and its liquid state or its solution phase is held or carried by or bonded to the matrix. The matrix is advantageously an inert material such as aluminium oxide and has pores, which are permeable for the volatile liquid and in which the active substance is located. In particular, a material can be used that has a surface or surfaces, at which the active substance can be bonded in its liquid state thereof.

Abstract: In a chemical heat pump installation two identical main units are provided, each one including a reactor and one condenser/evaporator integrated in the same container (100). One main unit is charged while the other one e.g. produces cooling. Large energy amounts are consumed in the switching operation when the unit that has been charged is to be cooled and the unit that has produced cooling is to be heated. To reduce these amounts of energy each of reactor and condenser/evaporator are divided in two further vessels. The condenser/evaporator has one part (3), in which the heat exchanger (3.3) thereof is placed, and one collecting part (4), in which the volatile liquid in its condensed shape is stored. In the same way, the reactor has a part (1), in which the heat exchanger (1.3) and the filter (1.2) thereof are placed, and a collecting part (2), in which solution of the active substance in the volatile liquid is stored.