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A packing for heat and/or mass transfer between liquid and gaseous media in counter-flow, in particular for water cooling by air in cooling towers, includes a plurality of film elements contoured by corrugations. The corrugations provide flow passages and the film elements are successively arranged behind each other in the thickness direction forming points of contact. Adjacent film elements are connected to one another at their points of contact and mutually facing large surfaces of adjacent film elements have a fine contouring. The fine contouring includes a ribbing with rib webs and rib grooves running transversely to the flow passages. A rib groove is disposed between two adjacent rib webs. The transitions between successive rib webs and rib grooves are designed such that they are substantially free of radii.

Titel:	Packing for heat and/or mass transfer
Autor/in / Beteiligte Person:	CTS Cooling Tower Solutions GmbH
Link:	View record in USPTO Patent Grants (Volltext)
Veröffentlichung:	2021
Medientyp:	Patent
Sonstiges:	Nachgewiesen in: USPTO Patent Grants Sprachen: English Patent Number: 11175,097 Publication Date: November 16, 2021 Appl. No: 16/413926 Application Filed: May 16, 2019 Assignees: CTS Cooling Tower Solutions GmbH (Düsseldorf, DE) Claim: 1. A packing for heat and/or mass transfer between liquid and gaseous media in counter-flow comprising a plurality of film elements contoured by corrugations, said corrugations providing flow passages and said film elements being successively arranged behind each other in the thickness direction forming points of contact, wherein adjacent film elements are connected to each other at their contact points and wherein mutually facing large surfaces of adjacent film elements have a fine contouring, wherein said fine contouring comprises a ribbing with rib webs and rib grooves running transversely to the flow passages, wherein a rib groove is arranged between two adjacent rib webs, wherein transitions between successive rib webs and rib grooves are designed in such a way that the transitions are substantially free of radii, wherein end regions of a film element which are opposite each other in the longitudinal direction are free of fine contouring, wherein channels are formed in the end regions of the film elements which are free of fine contouring and extend obliquely with respect to the longitudinal extension of the film elements, into which channels the flow passages open, wherein a film element has two channels for each flow passage, which channels are aligned to each other in a V-shape. Claim: 2. The packing according to claim 1 , wherein the corrugations provide flow passages which are inclined in the longitudinal direction of the film elements, the film elements being arranged alternately in the thickness direction, so that the flow passages of adjacent film elements extend oppositely inclined and cross while forming the contact point. Claim: 3. The packing according to claim 1 , wherein the transition radii are less than 20% of the rib web plateau width of the corresponding rib web. Claim: 4. The packing according to claim 1 , wherein a rib groove has a groove depth of 2 mm to 3 mm. Claim: 5. The packing according to claim 1 , wherein the two channels open into a common outlet that is aligned in the direction of the longitudinal extension of the film elements. Claim: 6. The packing according to claim 1 , wherein the mutually facing flow passages of adjacent film elements form a film pair passage with a polygonal cross section on the input and output sides respectively. Claim: 7. The packing according to claim 1 , wherein the corrugations of the film elements comprise a first strip portion extending in the longitudinal direction of said film elements as well as a second and a third strip portion disposed thereon along its respective longitudinal edges, said second and third strip portions being inclined to said first strip portion. Claim: 8. The packing according to claim 7 , wherein the second and third strip portions are of equal width and each has a width that exceeds the width of the first strip portion. Claim: 9. The packing according to claim 8 , wherein the width ratio of the first strip portion to the second strip portion or of the first strip portion to the third strip portion is between 0.3 and 0.4. Claim: 10. The packing according to claim 7 , wherein the width of the first strip portion is at least 5 mm. Patent References Cited: 1847216 March 1932 Hubbard ; 3618778 November 1971 Benton et al. ; 3952077 April 1976 Wigley ; 4296050 October 1981 Meier ; 4675103 June 1987 Nadudvari ; 4801410 January 1989 Kinney, Jr. ; 4929399 May 1990 Lockett ; 5124087 June 1992 Bradley ; 5167879 December 1992 Streng ; 5454988 October 1995 Maeda ; 5616289 April 1997 Maeda ; 6578829 June 2003 Ender et al. ; 8622115 January 2014 Seebald ; 2012/0049392 March 2012 Trompiz ; 2017/0198992 July 2017 Shin ; 2722424 November 1978 ; 2722556 November 1978 ; 3918483 December 1990 ; 4122369 October 1992 ; 0056911 August 1982 ; 1078684 February 2001 ; 2009-149954 December 2009 Primary Examiner: Bushey, Charles S Attorney, Agent or Firm: Harness, Dickey & Pierce, P.L.C.

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Packing for heat and/or mass transfer