Magnetocaloric heat generator
A generator and thermal technology, applied in the direction of machines using electric/magnetic effects, machine operation, energy-saving heating/cooling, etc., can solve the problem of proper mixing of unfavorable heat-carrying fluids, increase the complexity of heat generators, and cannot be realized optimal heat exchange etc.
Inactive Publication Date: 2014-07-02
COOLTECH APPL SAS
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Problems solved by technology
However, this configuration leads to inherent disadvantages related to the transfer of heat-carrying fluid between thermal modules: channels must be made to allow this fluid to be exchanged, which increases the complexity of the heat generator and is not conducive to heat transfer Proper mixing of fluids, does not allow for optimal heat exchange between the output fluid of one magnetocaloric element and the input fluid of the next thermal module, and contributes to increased load losses
However, the heat transfer fluids freely available on the market today do not have optimum characteristics over a large temperature range, which requires compromises and does not allow maximum utilization of the heat capacity of the generator
Method used
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[0028] In the illustrated embodiments, identical parts or parts are provided with the same reference numerals.
[0029] Each heat generator 1, 10, 20, 30, 40 comprises two magnetocaloric elements 2, 12 each comprising a magnetocaloric material. The invention is not limited to such configurations and extends to more than two magnetocaloric elements 2, 12 each comprising one or several magnetocaloric materials. In fact, each magnetocaloric element 2, 12 can be composed of several magnetocaloric materials including different Curie temperatures and producing a large magnetocaloric effect, so that several magnetocaloric materials can be arranged side by side in the heat generator 1, 10, A high temperature gradient is made between the hot and cold ends of 20, 30, 40 and thus even higher efficiencies are obtained. This configuration can also cover a large temperature range corresponding to the range of operation and use of the generator.
[0030] Each magnetocaloric element 2 and 1...
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The magnetocaloric heat generator (1) comprises at least two magnetocaloric elements (2, 12) arranged in succession and making up at least two consecutive thermal stages crossed by separate heat transfer fluids and comprising each two opposite ends (3 and 4, 13 and 14), a magnetic arrangement intended for subjecting each magnetocaloric element (2, 12) to a variable magnetic field, alternately creating a heating cycle and a cooling cycle in each magnetocaloric element (2, 12), a mechanism (8) for circulating the heat transfer fluids through the magnetocaloric elements alternately towards one end and towards the opposite end and vice versa, in synchronization with the variation of the magnetic field. The magnetocaloric elements (2, 12) are connected thermally two by two at their consecutive ends (4, 13) through the intermediary of a heat exchange mechanism (5) in thermal contact respectively with the heat transfer fluid circulating in the first (2) of the magnetocaloric elements and with the heat transfer fluid circulating in the second (12) of the magnetocaloric elements.
Description
technical field [0001] The invention relates to a magnetocaloric heat generator comprising at least two magnetocaloric elements arranged one behind the other and forming at least two successive heat stages, the magnetocaloric elements being separated heat-carrying fluid passes through, and each of said magneto-caloric elements includes two opposite ends; a magnetic device for subjecting each of said magneto-caloric elements to a varying magnetic field, A heating cycle and a cooling cycle are alternately generated in the thermal element; a heat transfer fluid driving part drives the heat transfer fluid to one end alternately in a manner synchronous with the change of the magnetic field and towards the opposite end and oppositely through the magnetocaloric element in the direction of the opposite end and towards the end. Background technique [0002] Cold magnetic technology has been known for over twenty years and the ecological and sustainable advantages it brings. It is a...
Claims
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IPC IPC(8): F25B21/00H10N10/80
CPCF25B21/00F25B2321/002Y02B30/66Y02B30/00
Inventor J-C·埃茨勒C·米勒
Owner COOLTECH APPL SAS