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公开(公告)号：US09869303B2
公开(公告)日：2018-01-16
申请号：US14851569
申请日：2015-09-11
Applicant: NGK Insulators, Ltd.
Inventor： Yukio Miyairi , Shinichi Miwa , Naomi Noda , Yuji Deguchi , Teruyoshi Mori , Kazuhiko Hamatsuka , Hiroyuki Suenobu , Masayuki Hironaga , Kazuhiko Kumazawa
CPC classification number: F03G7/00 , F02G1/0435 , F03G7/002 , F25B9/145 , F25B2309/1402
Abstract: A heat/acoustic wave conversion component having a first end face and a second end face, includes a partition wall that defines a plurality of cells extending from the first end face to the second end face, inside of the cells being filled with working fluid that oscillates to transmit acoustic waves, the heat/acoustic wave conversion component mutually converting heat exchanged between the partition wall and the working fluid and energy of acoustic waves resulting from oscillations of the working fluid. Hydraulic diameter HD of the heat/acoustic wave conversion component is 0.4 mm or less, where the hydraulic diameter HD is defined as HD=4×S/C, where S denotes a cross-sectional area of each cell perpendicular to the cell extending direction and C denotes a perimeter of the cross section, and the heat/acoustic wave conversion component has three-point bending strength of 5 MPa or more.
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公开(公告)号：US09759157B2
公开(公告)日：2017-09-12
申请号：US14849984
申请日：2015-09-10
Applicant: NGK Insulators, Ltd.
Inventor： Yukio Miyairi , Shinichi Miwa , Tatsuo Kawaguchi , Naomi Noda , Yuji Deguchi , Teruyoshi Mori , Kazuhiko Hamatsuka , Hiroyuki Suenobu , Masayuki Hironaga , Kazuhiko Kumazawa
CPC classification number: F02G5/02 , F02G1/02 , F02G1/043 , F02G2243/54 , F03G7/002 , F25B9/145 , F25B2309/1402
Abstract: A heat/acoustic wave conversion unit includes a heat/acoustic wave conversion component and two heat exchangers. Hydraulic diameter HD of the cells in the heat/acoustic wave conversion component is 0.4 mm or less, and a ratio HD/L of HD to the length L of the heat/acoustic wave conversion component is from 0.005 to 0.02. One of the heat exchangers includes a heat-exchanging honeycomb structure and an annular tube that surrounds a circumferential face of the heat-exchanging honeycomb structure. The annular tube includes a structure body that is disposed in the channel to increase a contact area with the heated fluid, an inflow port into which the heated fluid flows, and an outflow port through which the heated fluid flows out. At least one of the heat-exchanging honeycomb structure and the structure body is made of a ceramic material that contains SiC as a main component.
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公开(公告)号：US09765760B2
公开(公告)日：2017-09-19
申请号：US14851628
申请日：2015-09-11
Applicant: NGK Insulators, Ltd.
Inventor： Yukio Miyairi , Shinichi Miwa , Yuji Deguchi , Teruyoshi Mori , Kazuhiko Hamatsuka , Hiroyuki Suenobu , Masayuki Hironaga , Kazuhiko Kumazawa , Naomi Noda
CPC classification number: F03G7/00 , F02G1/0435 , F02G2243/54 , F03G7/002 , F25B9/145 , F25B2309/1402
Abstract: A heat/acoustic wave conversion component includes a plurality of monolithic honeycomb segments each including a partition wall that defines a plurality of cells extending between both end faces, and the plurality of monolithic honeycomb segments each mutually converts heat exchanged between the partition wall and the working fluid in the cells and energy of acoustic waves resulting from oscillations of the working fluid. In the heat/acoustic wave conversion component including the plurality of honeycomb segments each being monolithic configured, hydraulic diameter HD of the cells is 0.4 mm or less, open frontal area of the honeycomb segments is 60% or more and 93% or less, heat conductivity of the honeycomb segments is 5 W/mK or less, and a ratio HD/L of the hydraulic diameter HD to the length L of the honeycomb segment is 0.005 or more and less than 0.02.
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公开(公告)号：US09759201B2
公开(公告)日：2017-09-12
申请号：US14853015
申请日：2015-09-14
Applicant: NGK Insulators, Ltd.
Inventor： Yukio Miyairi , Shinichi Miwa , Naomi Noda , Yuji Deguchi , Teruyoshi Mori , Kazuhiko Hamatsuka , Hiroyuki Suenobu , Masayuki Hironaga , Kazuhiko Kumazawa
CPC classification number: F03G7/00 , F02G1/0435 , F02G2243/54 , F03G7/002 , F25B9/145 , F25B2309/1402 , H02K35/06
Abstract: A heat/acoustic wave conversion component includes a partition wall that defines a plurality of cells, inside of the cells being filled with fluid that oscillates to transmit acoustic waves, the heat/acoustic wave conversion component mutually converting heat exchanged between the partition wall and the fluid and energy of acoustic waves resulting from oscillations of the fluid. The plurality of cells have an average of hydraulic diameters HDs that is 0.4 mm or less in a plane perpendicular to the cell extending direction, the heat/acoustic wave conversion component has an open frontal area at each end face of 60% or more and 93% or less, and distribution of hydraulic diameters HDs of the plurality of cells has relative standard deviation that is 2% or more and 30% or less.
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