The distributor plate 21 supports the bed particles 22 in tubes 11, yet is permeable by the second liquid 18 which enters the tube beds through the perforations 23. �s�pũ�=�:i,!��&8��d��5(zj-Q�:�62��[�'����=D��QB$Ul�29���H���FZ ��T��&UZJ��T�v�k7��,����~�%>��4R$���H�v�m���+U����-^|d�y �!epb�)���ؔ�m���i�����eRBL>��Yh����U/�t�C�*6Q���PZ�]1����ʨ�(�Ě��յ�R�E��nX Each tube has a second fluid inlet and outlet. It is also known that the fluidized bed of particles acts as a scouring agent, and prevents the formation of deposits on the enclosures containing the fluidized bed. During this mode of operation it is advantageous if some bed particles 22 travel downward through one or more of tubes 11, creating a circulation pattern. a shell enclosure containing the first fluid and including an inlet and an outlet for said fluid; one or more tubes forming an enclosure for the second fluid and containing a plurality of particles to be fluidized, and each of said tubes including an inlet and an outlet for the second fluid; tube inlet header means open to said fluid inlets of said tubes and in fluid communication with a common second fluid source; tube outlet header means open to said fluid outlet of said tubes and in fluid communication with a common outlet for the second fluid; distributor plate means for supporting said particles that is permeable by the second fluid, and having a plurality of perforations each of which has a smaller diameter than the diameter of said particles, and which is generally parallel to and below the bottom of said inlets of said tubes, with distance between the top of said distributor plate and bottom of said tube inlets being greater than or equal to five times the diameter of said particles, wherein a circular region below said tubes in which a downward particle flow is desired is devoid of perforations, the diameter of said region of said distributor plate devoid of particles being: ##EQU2##. The shell enclosure 2 is defined by a top wall 3, a bottom wall 4, and a continuous side wall 5. Said tubes 11 may have smooth walls, may be grooved, or may be provided with fins on the inside or outside. endstream endobj 60 0 obj << /Type /FontDescriptor /Ascent 1100 /CapHeight 718 /Descent -309 /Flags 32 /FontBBox [ -194 -307 1688 1083 ] /FontName /AGIBBD+Arial-Black /ItalicAngle 0 /StemV 222 /FontFile2 62 0 R >> endobj 61 0 obj << /Type /Font /Subtype /TrueType /FirstChar 32 /LastChar 116 /Widths [ 333 0 0 0 0 0 0 0 0 0 0 0 333 0 333 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 778 778 778 778 722 667 833 833 389 0 0 667 944 833 833 722 0 778 722 722 833 778 0 0 778 722 0 0 0 0 0 0 667 0 667 667 667 0 0 0 333 0 0 0 0 667 667 0 0 0 611 444 ] /Encoding /WinAnsiEncoding /BaseFont /AGIBBD+Arial-Black /FontDescriptor 60 0 R >> endobj 62 0 obj << /Filter /FlateDecode /Length 10998 /Length1 18056 >> stream © 2004-2020 FreePatentsOnline.com. Empirical heat-transfer correlations for the fluidized bed and s-CO2 were used in calculating the heat-transfer area and optimizing the tube layout. The distributor plate 21 is positioned generally parallel to and below the bottom wall 4. trailer << /Size 69 /Info 52 0 R /Root 55 0 R /Prev 405283 /ID[<7669c9dd655a58f81ad9bb8b85453bd2>] >> startxref 0 %%EOF 55 0 obj << /Type /Catalog /Pages 51 0 R /Metadata 53 0 R /PageLabels 50 0 R >> endobj 67 0 obj << /S 147 /L 225 /Filter /FlateDecode /Length 68 0 R >> stream & Terms of Use. Deposits on the enclosures are undesirable as they impede the transfer of heat between the fluids. Most elements of the preferred embodiment will be designated by reference numerals, as indicated on FIG. It is, however, disadvantageous to allow the second fluid 18 to travel downward in any of tubes 11 as this creates a thermal short circuit, decreasing the efficiency of the heat exchanger. It is, accordingly, advantageous to lower the velocity of the second fluid 18 through one or more of tubes 11, allowing a portion of the bed particles 22 to travel downward, without creating downward flow of second fluid 18. Therefore, it is a principal object of the invention to provide a heat exchanger means and method which improves the art. The fluidized bed enhances heat transfer on the tube side and also acts to prevent formation of deposits on the tube walls. The porosity, ε, of an expanded bed may be related to the superficial fluid velocity, Vo, by Different sizes and types of bed particles can be used depending on the density and viscosity of the second fluid. 0000002632 00000 n A distributor plate 21, consisting generally of a flat plate having small perforations 23 throughout, extends laterally through the shell 2 and abuts the side wall 5 thereof. H��V TSW�Y�D�&���^��@/ ( ��a3 ��֒�y�䅼HQ�h�ZlW��;.ť=S���U�[E�VGƩ.m��}0��:sΜ3s��{睗�������K�X 7P8 ;A�JR,M_�4] �}�4�aqE� x9#��h��I� �H�Uk,�a�[�d���d{�-�r+� �S �y�\ɕ� ND��p}Ο��g ӑ�HR�z������BO�� m&���[> �t��_��1��V�c� m XRI���J`�A����! ��y+ռ�������F��Bp2 ������Y The bed of particles can induce flow patterns which reduce the efficiency of heat exchange between the two fluids. FIG. The manufacture of particles with specific properties is of increasing importance in food An improved heat exchanger for the transfer of heat between a first and second fluid includes a shell enclosure, tube means, fluidized bed of particles, and a distributor plate. An inlet 16 is connected to an inlet conduit 17, and is connectable to the source of the second fluid 18. Fluidized baths are safer to operate than molten salt baths while immersed objects come out clean and dry with no material to remove. All rights reserved. A further object of the invention is to provide a means by which flow patterns detrimental to heat transfer are not induced. FIG. To accomplish this, a circular region or regions 24 of the distributor plate 21 directly below one or more of tubes in which downward particle flow is desired should be devoid of the perforations 23 (FIG. Proceedings of the ASME 2017 11th International Conference on Energy Sustainability collocated with the ASME 2017 Power Conference Joint With ICOPE-17, the ASME 2017 15th International Conference on Fuel Cell Science, Engineering and … Therefore, the condition defined by the following inequality exists: d3
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