0000002589 00000 n �X�tF����A4����T�KQ��=6����ZU���{��r�k����z��FѤ�C�����(�I���#�|P\%��Ct�;q�j��Yͬ�l�(��f���jﴏ �emqit�%��� �+u����m�~�O�����1o'��X�?J��[�AT�� �c:�8��ٞ���7��O��V�Nژr�Rq��q�ku�"��br�p8��t�k6�˲��-�� C��jg'̬������_�.��X���*� �Ut`$�b t��r�U{���G���es*��M�\�=��]&ʵ��e>p��q����m��cӊ��QC tube passes). F�w"�. �t�Bu]@�c���Z�n#4a��Ƽ��-�²D;�,WNbScH���ܢ�iæ�s��z�s�X�v�O�\�R��P"���=e#�k���� �,翽vӪ���8r�\���c� �V/DS�ќ#-�Fʷ#3����{=��&�}�*'��ڧH�QYVz"�D#����qՑz )-,3:J>36F7,-@WAFLNRSR2>ZaZP`JQRO�� C&&O5-5OOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOO�� A�" �� Heat can flow only from the hotter to the cooler fluid. Leave a comment To reduce the temperature of a hot fluid by means of cooler fluid. tubes passes) Right: Shell-and-tube with two shell passes and any multiple of four tube passes (four, eight, etc. 2. The hot and cold fluids alternate between each of the plates. 2. ( Heat Exchanger Design Handbook. This is due to the larger area the plates provide over tubes. 0000002837 00000 n 146 13 <> �")U�d��q����ы#QJ�,s8���⽇WW�n��V���� �� 3.1 Function and configuration of heat exchangers Figure 3.4 Heliflow compact counterflow heat exchanger. �X�N�u'�%+��0Gd§n��H���Iś]'s������V5E�q�#�St��$��p ��.�-�t���[ W�60H&O'�4��9�4651���$�"��ʶI�� wVOkw�h�y'q�I&�)���;F�&���t�xB���j��#Y*j2O��(��%�]9Q. %���� Boiler articles, Mechanical Articles 3. 0000001439 00000 n Due to the high heat transfer efficiency of the plates, plate type heat exchangers are usually very small when compared 10,994 Views. In a heat exchanger, there is no direct contact between the two fluids. ' .)10. In systems where the two fluids are at vastly different pressures, the higher pressure fluid is typically directed through the tubes and the lower pressure fluid is circulated on the shell side. The heat is transferred from the hot fluid to the metal isolating the two fluids and then to the cooler fluid. Classification and types of Heat Exchangers. 0000001064 00000 n As in all mechanical devices, each type has its advantages and disadvantages. 8 Bavex welded- plate heat exchanger. �&���i%�;���NS�}� �pN�}퀂�m�ڵ �!B���t���l�|a}0��j����O����U�#@�b�i��� Heat exchangers are classified in many ways: The heat is transferred from the hot fluid to the metal isolating the two fluids and then to the cooler fluid. <<6574CB507048D34FB20D260C345958E2>]>> Heat exchangers find widespread use in power generation, chemical processing, electronics cooling, air-conditioning, refrigeration, and automo- tive applications. 5 Gasketed plate-and-frame heat exchanger. Heat Exchangers 5.1 Introduction Heat exchangers are devices used to transfer heat between two or more fluid streams at different temperatures. �� � w !1AQaq"2�B���� #3R�br� <> startxref To condense a gaseous fluid by means of cooler fluid. • According to the type of construction (shell and tube type or plate type); Fig. To boil a liquid by means of a hotter fluid. Plate type heat exchangers are not widely used because of the inability to reliably seal the large gaskets between each of the plates. Industrial Refrigeration Principles Design and Applications, Piping and Pipeline Calculations Manual 2nd Edition, Fire Protection Engineering in Building Design, Engineering Fundamentals of the Internal Combustion Engine, Troubleshooting Centrifugal Pumps and Their Systems, Boiler Blowdown types and Boiler Blowdown calculation, Compressor and Classification of compressor operation Industrial uses, Refrigeration and Air Conditioning Technology 7th edition pdf, A textbook of Refrigeration and Air Conditioning, Boiler operation engineering questions and answers pdf, 2018 ASHRAE Handbook Refrigeration SI Edition, US Navy Course Electricity and Electronics Training Series, Manufacturing Machining and Production Technology, Best mechanical engineering Reference Books, HSE in oil & Gas industry and petroleum engineering. 0000000016 00000 n Fig. In almost any power, chemical, or mechanical system, heat must be transferred from one place to another or from one fluid to another. ��Ѹd%,ـ�*ّ����Y �I�*ڻ :��5jY�c� IJ-�j�v/ۓ,��jM��u��(j���V����Z�K�X�&ʵ��˪�3+m���[=�6{S����t�eI]W������o8�������5���+�2�# ���GB�c���$v��I���mߜ�e�w�RL�8�����Q(]�aUe�^�5Ĭs��a�N~sZ��n�"aY��)[�W�bd!�����O���|�0���f�3��N�������F�,�8��/��Ab���sB����r���M�Q�Ny�{��5��[���-���"{V��"���+(�%&�J��Ӳ}i�H�KZ�[Ә���P���Y�x� JC[k �� <> Heat exchangers are used to transfer heat from one fluid to another. Because each of the plates has a very large surface area, the plates provide each of the fluids with an extremely large heat transfer area. 0000001282 00000 n Find out NTU from the NTU- relationships for different types of heat exchangers … Animation of typical shell and tube type heat exchanger is shown in the picture. 0000001857 00000 n 4. Because of this problem, plate type heat exchangers have only been used in small, low-pressure applications such as on oil coolers for engines. 0000000556 00000 n 4. endobj The fluid flowing inside the tubes is called the tube side fluid and the fluid flowing on the outside of the tubes is the shell side fluid. Contact Us or Read Privacy Policy, Types of Heat Exchangers Shell and tube, Plate type. �,�~��4�e+��>]]lG�9���oej7\M���+b`�ԵJL��MN�2����Oq�h��,�czD��x��� DӥB� Plate type heat exchanger consists of plates instead of tubes to separate the hot and cold fluids. Plate type heat exchanger consists of plates instead of tubes to separate the hot and cold fluids. To boil a liquid while condensing a hotter gaseous fluid. ���*���k�(�r�`�I�EE>��f��e���d��w&��tKj�"l�^�� ��l�.�EZ4� ?sݠ�>u�n�kaA^�o~���z��5���оp�24_��/����ƍP��S�ɐ�eY�;FI�idŎ�Ҷ�Ѳ����1% �L��qj�� '�t� N 158 0 obj<>stream 9 Spiral plate heat exchanger with both fluids in spiral counter flow. To boil a liquid while condensing a hotter gaseous fluid. 146 0 obj <> endobj 3 0 obj endobj 0 %PDF-1.5 H3�G� �> endobj 148 0 obj<> endobj 149 0 obj<>/ColorSpace<>/Font<>/ProcSet[/PDF/Text/ImageC]/ExtGState<>>> endobj 150 0 obj<>stream k#c�H���eo2*��N��O�b8��!/?��G�C뒛3�� j�hf�3Ư7}��Pb@J7SJ�h�^��v��o9��5N�vX������iQ[�v6+�t3�5P�o�|N9?ZL�e��J@ew�o+��6~ay1�꧔���Z��J'+��#w%|5�}�A�]C�h>~&����|�Ҭ������G3!c6�w؆W����z}Z�v��ղ~�ޅ�z�c6��lP����g�`x�-_�A?U����W|�쌔ܘ����s\�ÄE�0���{,��������#VHz�2[DYn���d2.l3����ې���`��ځ|��,����J5K! stream Because each of the plates has a very large surface area, the plates provide each of the fluids with an extremely large heat transfer area. Plate type heat exchangers are not widely used because of the inability to reliably seal the large gaskets between each of the plates. 7 0 obj 0000063545 00000 n 1. ���h'͒>�\,G�*�/z�nNiv�� D�i�s��*}���3M?|����_��ޛo4w'�n�;{��ONԮ ��e^�.�>�ʷ@����?�+H=@��B)�f����&8��6��J��v��X���!�4ܒW`�nȏ��XeNE. �I'��y�����b�ecY��qro�F�=�(��s��!��7����k��^6�H��P��=�,����h�� ���Zv� �"��Bo�p��pv���;?#�ƌ�����sD# (R���vdx� )qI�@����(��_�H�_�R���_�(?�� *�mq�j+m�mK�]�s�vѶ��F�9��;h�Sm��G0r�m�mK���s�v��2�r��F{Ո¬��2���:��6�q���]�ݰx�s�H�M8�P��%���W=��}Q�_/���s�=����&A��mX�I�����`=jm�l��W(Ñ���c�����ښ�+��~"�lz��g�Ӥ��m��|�j9��"�any^��@� 4 0 obj Baffles direct the flow of fluid between plates. "`AZ#cԌ�m!������#sK�S�ֆm�!���� �'��z'�[��(0����~�6��>�ƺ�k�r!�Z��6]�Z�����h��R耆�q2"x?��- k:���hy�����ĥst��T�ۜ�4�)8�k��st��aeX���8��M�[ �|5�O�D�|�u��N%llh5^�� �ø�D���Ɗph����*�'c��Y=�߽����Y$�v�x��2t�h� 2~��9�[�U�x$�d�]��>���`�t�D��i�h��R2]����R���.�huOkZ�tx��|�C8����l#�C���w�����׸���B���Ȇ�j��wj|��i�Sאd K�e�ȉ��X���K����lc'p:����Ә#�aS�ns�@����ͮ����xG���cT^��;7IlI�L� ` >)����O�8�����xc`�d�~h�@;�@scS(9��N� L�d�A��ud��~��{G�wd�a��B� �Ӵi�h ��'H�-oMV�1�H�5��v�s$�O�O!�Xuӕ�!� D�6=H�v��� �J�74����=�hf���9�N��r�7�xu���0B� �N��Sk^��lk� 5. k��f�M���j�0�F�}+H�\�d��tQ����t_�s���y��窊���NT���ym �. Fig. The tubes are rolled and press-fitted or welded into the tube sheet to provide a leak-tight seal. trailer Heat can flow only from the hotter to the cooler fluid. The most basic and the most common type of heat exchanger construction is the shell and tube type. A heat exchanger is a component that allows the transfer of heat from one fluid (liquid or gas) to another fluid. 4 Standard shell types and front- and rear-end head types (From TEMA, 1999). 0000001934 00000 n June 30, 2019 F correction factors for several heat exchanger types: Left: Shell-and-tube with one shell pass and any multiple of two tube passes (two, four, etc. Ũ@%� ���f�!ݓ�������g���Ue�t�Un�����k#қg��Y1{t*O|�(����̅��aH��ҝ������?h�>���Ѵ��]Pz� 3^���rS�rk 0000002873 00000 n <> In a counter-current flow heat exchanger, it is possible to heat the cold fluid to higher temperatures than the hot fluid outlet temperature, while in the other it is not possible. endstream endobj 151 0 obj<> endobj 152 0 obj<> endobj 153 0 obj<> endobj 154 0 obj[/ICCBased 157 0 R] endobj 155 0 obj<>stream x��W�n7��?pU�=|s��C� �� This type of heat exchanger consists of a set of tubes in a container called a shell. Fig. This is due to the economy, because the heat exchanger tubes can be made to withstand higher pressures than the shell of the heat exchanger for a much lower cost.

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