Abstract:
A cooling circuit comprising a liquid circulation path and arranged on the path: in series, an engine and a radiator, mounted on a first branch in parallel between the inlet and outlet of the radiator, a store-exchanger containing at least one volume: enclosing elements for storing and releasing thermal energy, involving a phase change material PCM, placed in a heat exchange relationship with said liquid, and around which are arranged at least one first layer containing a PCM and one second layer containing a porous thermally insulating material, and valves so positioned as to direct the circulation of the liquid arriving from the engine toward the radiator and/or the store-exchanger.
Abstract:
Provided is a gelled carbon-based composition forming an organic polymeric monolithic gel capable of forming a porous carbon monolith by pyrolysis, a use thereof and a process for preparing this composition. A composition according to the invention is based on a resin derived at least partly from polyhydroxybenzene(s) R and formaldehyde(s) F, has a thermal conductivity of less than or equal to 40 mW·m−1·K−1, and includes at least one water-soluble cationic polyelectrolyte P. A process for preparing this composition comprises: a) polymerization, in an aqueous solvent, of the polyhydroxybenzene(s) and formaldehyde(s), in the presence of at least one cationic polyelectrolyte dissolved in this solvent and of a catalyst, in order to obtain a solution based on the resin, b) gelling of the solution in order to obtain a gel, and c) drying in order to obtain the organic polymeric monolithic gel.
Abstract:
The invention concerns an insulating part comprising a sealed casing defining an inner enclosure (7), the part having thermal conductivity of less than 100 mW/m.K, the sealed casing (3) comprising at least one thin metal sheet (30, 31) having a thickness of less than 1 mm and welded peripherally to keep the enclosure under low pressure and/or controlled atmosphere, the weld, which is produced in a chamber under low pressure and/or controlled atmosphere, having a leakage rate of less than 10−6 Pa·m3/s, after a first thermal treatment according to the standard RTCA-DO 160-G, section 5, Cat A (from −55° C. to 400° C.) and a second thermal treatment at −196° C. for 1 hour.
Abstract:
Provided is a gelled carbon-based composition forming an organic polymeric monolithic gel capable of forming a porous carbon monolith by pyrolysis, a use thereof and a process for preparing this composition. A composition according to the invention is based on a resin derived at least partly from polyhydroxybenzene(s) R and formaldehyde(s) F, has a thermal conductivity of less than or equal to 40 mW·m−1·K−1, and includes at least one water-soluble cationic polyelectrolyte P. A process for preparing this composition comprises: a) polymerization, in an aqueous solvent, of the polyhydroxybenzene(s) and formaldehyde(s), in the presence of at least one cationic polyelectrolyte dissolved in this solvent and of a catalyst, in order to obtain a solution based on the resin, b) gelling of the solution in order to obtain a gel, and c) drying in order to obtain the organic polymeric monolithic gel.
Abstract:
An assembly having a structure provided with an interior volume in which is present for example at least one fluid capable of circulating in said volume and under the action of circulation means. Thermally insulating elements of VIP construction are arranged around a layer containing a PCM and extending around the peripheral wall that surrounds the volume. Protrusions fixed to the peripheral wall delimit spaces in which the thermally insulating elements are positioned. A sleeve extends around the protrusions and the insulating elements.
Abstract:
This relates to a cooling circuit comprising a liquid circulation path and arranged on the path: in series, an engine (2) and a radiator (8), mounted on a first branch in parallel between the inlet and outlet of the radiator, a store-exchanger (10) containing at least one volume: enclosing elements for storing and releasing thermal energy, involving a phase change material PCM, placed in a heat exchange relationship with said liquid (9), and around which are arranged at least one first layer containing a PCM and one second layer containing a porous thermally insulating material, and valves (14, 16, 18) so positioned as to direct the circulation of the liquid arriving from the engine toward the radiator and/or the store-exchanger.
Abstract:
Disclosed is an aerodyne including a supporting structure, to which are connected: at least one supporting axial blower, attached to the supporting structure; at least one main engine driving the supporting blower; at least three attitude blowers controlling roll and pitch, each attitude blower having an electrical motor and being attached, respectively, to one of the elongate arms that are distributed in a laterally, outwardly projecting manner around the supporting structure, to which each arm is connected by an inner end portion, the axis of rotation of each attitude blower being attached relative to the supporting structure, and all the attitude blowers being located outside the space centrally occupied by the supporting blower; at least one battery for supplying power to the electrical motors of the attitude blowers; a landing gear attached under the supporting structure; and a nacelle for holding the battery and a payload.
Abstract:
A crosslinked rubber composition, process for preparing same, and a flexible component based on at least one room-temperature vulcanizing “RTV” silicone elastomer and including at least one phase change material (PCM) is provided. The flexible element includes at least one elastomer layer capable of storing thermal energy and of releasing it which includes the crosslinked rubber composition. Also provided is a thermal control or regulating system incorporating the flexible element. The composition is such that the silicone elastomer has a viscosity measured at 23° C. according to the ISO 3219 standard which is less than or equal to 5000 mPa·s. The silicone elastomer includes two components A and B and is crosslinked by polyaddition or polycondensation, and the composition includes the PCM, which is not encapsulated and is in the micronized state, in an amount of greater than 50 phr (phr: parts by weight per hundred parts per elastomer(s)).
Abstract:
The present invention relates to a crosslinked rubber composition based on at least one elastomer of ethylene-propylene-diene terpolymer type (EPDM) and on at least one phase-change material (PCM), to a process for preparing this composition and to a multilayer pipe incorporating it. This composition includes at least 100 phr (phr: parts by weight per one hundred parts of elastomer(s)) of at least one phase-change material (PCM), and it is such that said at least one PCM is dispersed in the crosslinked composition and is provided with protection means that are capable of preventing its dispersion therein at a temperature above its melting point, which composition has a breaking strength of greater than 3 MPa and/or an elongation at break of greater than 100%, these properties being measured at 23° C. according to standard ASTM D 412.
Abstract:
The present invention relates to a crosslinked rubber composition based on at least one elastomer of ethylene-propylene-diene terpolymer type (EPDM) and on at least one phase-change material (PCM), to a process for preparing this composition and to a multilayer pipe incorporating it. This composition includes at least 100 phr (phr: parts by weight per one hundred parts of elastomer(s)) of at least one phase-change material (PCM), and it is such that said at least one PCM is dispersed in the crosslinked composition and is provided with protection means that are capable of preventing its dispersion therein at a temperature above its melting point, which composition has a breaking strength of greater than 3 MPa and/or an elongation at break of greater than 100%, these properties being measured at 23° C. according to standard ASTM D 412.