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US 2015/0144293 A1Published application
Heat transfer elements for a closed channel rotary regenerative air preheater
AssigneeALSTOM Technology Ltd
InventorJames David Seebald
Life of this patent
Estimating the term…
Abstract
A closed channel rotary regenerative air preheater 110 employs differing heat transfer elements 186, 196, arranged in an alternating order to impart turbulence in fluid flowing in closed channels or passageways 164 between the heat transfer elements 186, 196, to maintain heat transfer properties with reduced pressure drop.
Claims15
A closed channel rotary regenerative air preheater comprising:
- element supporting baskets each supporting a plurality of first heat transfer elements arranged in an alternating order with a plurality of second heat transfer elements;
- first heat transfer elements fabricated to comprise uniform alternating longitudinally parallel arches;
- second heat transfer elements fabricated to comprise two uniform alternating longitudinally parallel adjacent arches with an interval of longitudinally parallel uniform undulations angled with respect to the two adjacent arches between each pair of adjacent arches;
- adjacent arches of second heat transfer elements defining the spacing between the first heat transfer elements and the second heat transfer elements, and closing passageways formed therebetween for heat transfer fluid flow therethrough.
1 more element
A method of making a closed channel rotary regenerative air preheater comprising:
- providing a rotary regenerative air preheater equipped with element supporting baskets;
- fabricating from rigid material sheets first heat transfer elements having uniform alternating longitudinally parallel arches;
- fabricating from rigid material sheets second heat transfer elements having two uniform alternating longitudinally parallel adjacent arches with an interval of longitudinally parallel uniform undulations between each pair of adjacent arches;
- and
- arranging first heat transfer elements and second heat transfer elements within the element supporting basket in an alternating order with the adjacent arches of the second heat transfer elements defining the spacing between the first heat transfer elements and the second heat transfer elements, and the adjacent arches of the second heat transfer elements closing passageways to form closed channels for fluid flow therethrough.
2 more elements
A method of using a closed channel rotary regenerative air preheater comprising:
- providing a rotary regenerative air preheater equipped with element supporting baskets;
- arranging first heat transfer elements having uniform alternating longitudinally parallel arches in an alternating order with second heat transfer elements having two uniform alternating longitudinally parallel adjacent arches with an interval of longitudinally parallel uniform undulations angled between each pair of adjacent arches, within each element supporting basket so adjacent arches of the second heat transfer elements defining the spacing between alternating first heat transfer elements and second heat transfer elements, and adjacent arches of the second heat transfer elements close passageways to form closed channels for fluid flow therethrough;
- and
- providing a flow of flue gas and a flow of air therethrough to transfer heat from the flue gas FG to the air prior to use of the air as combustion air in a combustion furnace.
1 more element
Dependencies are inferred from the claim text.