[특허]Method and means for miniaturization of binary-fluid heat and mass exchangers

Iowa State University Research Foundation, Inc.

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특허 상세정보

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Method and means for miniaturization of binary-fluid heat and mass exchangers

특허상세정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	B01F-003/04
미국특허분류(USC)	165/116; 165/145
출원번호	US-0669056 (2000-09-25)
발명자 / 주소	Garimella, Srinivas
출원인 / 주소	Iowa State University Research Foundation, Inc.
인용정보	피인용 횟수 : 3 인용 특허 : 33

초록
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A binary-fluid heat and mass exchanger has a support structure with a plurality of horizontal vertically spaced groups of coolant tubes mounted thereon. Each group of coolant tubes comprises a pair of horizontal spaced hollow headers. A plurality of small diameter hollow coolant tubes extend between the headers in fluid communication therewith. Fluid conduits connect a header of one group of coolant tubes with a header of an adjacent group of coolant tubes so that all of the groups of coolant tubes will be fluidly connected. An inlet port for coolant fluid is located on a lower group of coolant tubes, and an exit port for coolant fluid is connected to a higher coolant group to permit coolant fluid to flow through the coolant tubes in all of the groups. A second inlet port for introducing a dilute solution of fluid downwardly over the coolant tubes is located above the support structure. A third inlet port for introducing a vapor to move upwardly through the groups is located below the lowermost group. A concentrated fluid exit port is located below the support structure for the removal of fluid collected from the various groups of coolant tubes.

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1. A binary-fluid heat and mass exchanger, comprising, a support structure wherein the support structure comprises two separate fluid supply masts, a plurality of vertically spaced elongated horizontal header members are secured by one end thereof to each of the masts in cantilever fashion so that for each header on one mast, an opposite parallel header is located on the other mast with the coolant tubes extending therebetween to form a coolant group, such that the two separate fluid supply masts are fluidly connected to one another, a plurality of horizontal vertically spaced coolant groups on the support structure, each coolant group comprises a hollow header assembly with a pair of horizontal spaced hollow headers with a plurality of small diameter coolant tubes fluidly extending between the headers in fluid communications with the headers wherein the headers have opposite ends and the horizontal cross section thereof uniformly decreases from one end to the other, fluid conduits fluidly connecting the header assembly and the coolant groups so that all of the coolant groups will be fluidly connected with each other, an inlet port for coolant fluid on a lower coolant group, and an exit port for coolant fluid is connected to a higher coolant group to permit coolant fluid to flow through the coolant tubes; the coolant tubes of each group being at right angles to each other, the coolant tubes being spaced approximately 3.175 mm apart, the coolant tubes having a diameter of about 1.587 mm or less, a second inlet port for introducing a dilute solution of fluid downwardly over the coolant tubes in all of the coolant groups; a third inlet port for introducing a vapor to move upwardly through the coolant groups to cause the vapor to combine with the dilute solution and condense on the coolant tubes of the coolant groups to create a concentrated fluid; a fluid exit port for allowing the concentrated solution of fluid to flow outwardly of the support structure. 2. A method of heat and mass transfer comprising: introducing a vapor into a support structure through an inlet port upwardly over a plurality of horizontal vertically spaced coolant groups on the support structure wherein each coolant group is comprised of a pair of horizontal spaced hollow headers with a plurality of small diameter hollow coolant tubes extending between the headers and in fluid communication with the headers, interconnecting the header assembly and the coolant groups so that all of the coolant groups will be fluidly connected with each other, arranging the coolant tubes of each group at right angles to each other, confining the small diameter hollow coolant tube to about 1.587 mm in diameter or less and spacing the hollow coolant tubes to approximately 3.175 mm to yield an extremely high coolant-side heat transfer coefficient, introducing a coolant fluid into the lowest coolant group through an inlet port for the coolant fluid; flowing the coolant fluid through the coolant groups and exit through an exit port at the top of the coolant groups; and introducing a dilute solution of fluid downwardly over the coolant groups so as to run counter-current with respect to the vapor, wherein the dilute solution is comprised of a dilute solution of ammonia and water, and the vapor is ammonia. 3. The exchanger of claim 1 wherein the exchanger has an envelope volume of 0.0077 M3or less. 4. The exchanger of claim 3 wherein the exchanger has a heat rejection rate of 19.28 Kw or more. 5. A method of heat and mass transfer comprising: introducing a vapor into a support structure through an inlet port upwardly over a plurality of horizontal vertically spaced coolant groups on the support structure wherein each coolant group is comprised of a pair of horizontal spaced hollow headers with a plurality of small diameter hollow coolant tubes extending between the headers and in fluid communication with the headers; interconnecting the header assembly and the coolan t groups so that all of the coolant groups will be fluidly connected with each other; arranging the coolant tubes of each group at right angles to each other; introducing a coolant fluid into the lowest coolant group through an inlet port for the coolant fluid; flowing the coolant fluid through the coolant groups and exit through an exit port at the top of the coolant groups; introducing a binary solution of fluid downwardly over the coolant groups so as to run counter-current with respect to the vapor, wherein the binary solution is comprised of a fluid pair of non-volatile and volatile absorbents; wherein the exchanger has an envelope volume of 0.0077 M 3or less; wherein the exchanger has a heat rejection rate of 19.28 Kw or more; and wherein heat and mass exchange occurs simultaneously at the same location on the surface of the coolant tubes. 6. The method of claim 5 wherein the small diameter hollow coolant tube in the exchanger is confined to about 1.587 mm in diameter or less and spacing the hollow coolant tubes is confined to approximately 3.175 mm to yield an extremely high coolant-side heat transfer coefficient. 7. A method of intermixing a vapor and a fluid to cause the vapor to intermix with the fluid to acquire by absorption certain physical properties of the fluid, comprising, forming a horizontal first grid of closely spaced narrow diameter hollow tubes; placing a plurality of similar grids in a horizontal position and in close vertical spaced relation to the first grid and to each other; fluidly interconnecting the tubes of each grid, and each grid passing a coolant fluid through the fluidly interconnected grids; passing a vapor upwardly for movement through the grids; taking a first fluid and continuously disbursing the fluid substantially over the first grid wherein the first fluid will releasable cling to the tubes of the first grid, and thence drop sequentially to releasably cling sequentially to the tubes of remaining grids; maintaining an open space between each grid so that when quantities of the first fluid sequentially release from the tubes of the first grid, they can fall directly and freely by gravity for impingement on a lower grid to be physically intermixed by the impingement phenomenon; and continuing the impingement phenomenon as quantities of said first fluid progressively drop by gravity onto the grids; whereupon each impingement phenomenon will progressively and sequentially mix the first fluid with the upwardly moving vapor.

이 특허에 인용된 특허 (33)

이 특허를 인용한 특허 피인용횟수: 3

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Method and means for miniaturization of binary-fluid heat and mass exchangers

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이 특허에 인용된 특허 (33)

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Method and means for miniaturization of binary-fluid heat and mass exchangers

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이 특허에 인용된 특허 (33)

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