{"id":6768,"date":"2019-02-15T13:52:22","date_gmt":"2019-02-15T12:52:22","guid":{"rendered":"http:\/\/www.tempco.it\/blog\/?p=6768"},"modified":"2019-02-26T17:23:59","modified_gmt":"2019-02-26T16:23:59","slug":"exhaust-heat-recovery-in-cogeneration-with-shell-and-tube-exchangers","status":"publish","type":"post","link":"https:\/\/www.tempco.it\/blog\/en\/6768\/exhaust-heat-recovery-in-cogeneration-with-shell-and-tube-exchangers\/","title":{"rendered":"Exhaust heat recovery in cogeneration with shell and tube exchangers"},"content":{"rendered":"<p>Let\u2019s finally talk about <a href=\"https:\/\/en.tempco.it\/solutions-en\/heat-exchangers\/shell-and-tube-heat-exchangers\/\" target=\"_blank\" rel=\"noopener\"><strong>shell and tube heat exchangers<\/strong><\/a>, employed in <a href=\"https:\/\/en.tempco.it\/solutions-en\/sol-cogeneration\/\" target=\"_blank\" rel=\"noopener\"><strong>cogeneration<\/strong><\/a> applications. Many times we\u2019ve had already spoken about cogeneration, and this new video on our <a href=\"https:\/\/youtube.com\/c\/TempcoItalia\" target=\"_blank\" rel=\"noopener\"><strong>Tempco Youtube channel<\/strong><\/a> (turn on subtitles) is dedicated to <strong>exhaust heat recovery<\/strong> from cogeneration engines.<\/p>\n<p>A cogeneration plant is usually equipped with an <a href=\"https:\/\/www.tempco.it\/blog\/en\/3568\/\" target=\"_blank\" rel=\"noopener\"><strong>endothermic engine<\/strong><\/a> driving a generator to produce electricity. <a href=\"https:\/\/www.tempco.it\/blog\/en\/6366\/chillers-in-power-generation-plants\/\" target=\"_blank\" rel=\"noopener\">Cogeneration<\/a> stands for power and heat generation at the same time, also leveraging thermal energy produced by the engine. This is possible thanks to <a href=\"https:\/\/www.tempco.it\/blog\/en\/6054\/heat-recovery-in-paper-mill-with-immersion-tcoil\/\" target=\"_blank\" rel=\"noopener\">heat recovery<\/a> achieved by a shell and tube heat exchanger on the exhaust fumes circuit.<\/p>\n<p><iframe loading=\"lazy\" width=\"750\" height=\"422\" src=\"https:\/\/www.youtube.com\/embed\/nKkj5IS08Bo?feature=oembed\" frameborder=\"0\" allow=\"accelerometer; autoplay; encrypted-media; gyroscope; picture-in-picture\" allowfullscreen><\/iframe><\/p>\n<p>Exhaust coming as waste from the endothermic engine in cogeneration have <strong>very high amounts of energy<\/strong>, making thermal recovery really advantageous instead of dissipating the heat. Here exhaust are at very high temperatures, typically between up to 550 and 650\u00b0 C depending on the kind of engine and fuel employed.<\/p>\n<p>For <strong>cogeneration heat recovery<\/strong> applications, shell and tube heat exchangers are suitable with <strong>straight pipes to allow cleaning operations<\/strong>, because exhaust can contain particles from combustion requiring some periodical <a href=\"https:\/\/www.tempco.it\/blog\/en\/5909\/fouling-in-heat-recovery-heat-exchangers\/\" target=\"_blank\" rel=\"noopener\">cleaning maintenance<\/a>. Construction material is usually <strong>stainless steel<\/strong>, especially for pipes and headers being in direct contact with exhausts. Diesel oil, biogas and methane exhaust can indeed contain acid elements <strong>exposing the components to corrosion<\/strong>, an even higher risk in case of high temperature conditions of cogeneration plants.<\/p>\n<p><a href=\"https:\/\/www.tempco.it\/blog\/wp-content\/uploads\/2019\/02\/Tempco-shell-and-tube-heat-exchanger.jpg\"><img decoding=\"async\" loading=\"lazy\" class=\"aligncenter wp-image-6764\" src=\"https:\/\/www.tempco.it\/blog\/wp-content\/uploads\/2019\/02\/Tempco-shell-and-tube-heat-exchanger-1024x577.jpg\" alt=\"scambiatore fascio tubiero cogenerazione\" width=\"532\" height=\"300\" srcset=\"https:\/\/www.tempco.it\/blog\/wp-content\/uploads\/2019\/02\/Tempco-shell-and-tube-heat-exchanger-1024x577.jpg 1024w, https:\/\/www.tempco.it\/blog\/wp-content\/uploads\/2019\/02\/Tempco-shell-and-tube-heat-exchanger-300x169.jpg 300w, https:\/\/www.tempco.it\/blog\/wp-content\/uploads\/2019\/02\/Tempco-shell-and-tube-heat-exchanger-768x433.jpg 768w, https:\/\/www.tempco.it\/blog\/wp-content\/uploads\/2019\/02\/Tempco-shell-and-tube-heat-exchanger.jpg 1658w\" sizes=\"(max-width: 532px) 100vw, 532px\" \/><\/a><\/p>\n<p>Working with high temperatures, heat recovery cogeneration applications thus also require special construction tricks: aimed to avoid <strong>failures due to <a href=\"https:\/\/www.tempco.it\/blog\/en\/6575\/pipe-expansion-in-exchangers-connection-pipes\/\" target=\"_blank\" rel=\"noopener\">thermal expansion<\/a><\/strong>, with unwanted side effects such as leaks, all the <strong>tubes are welded and pressed on headers<\/strong>, while the shell, which allows water flow employed for thermal recovery, is equipped with a <strong>thermal expansion joint<\/strong> to compensate the expansion gap between the shell, with water at temperature of approximately 90\u00b0, and the tube.<\/p>\n<p><a href=\"https:\/\/www.tempco.it\/blog\/wp-content\/uploads\/2019\/02\/Tempco-headers-shell-and-tube-exchangers.jpg\"><img decoding=\"async\" loading=\"lazy\" class=\"aligncenter wp-image-6766\" src=\"https:\/\/www.tempco.it\/blog\/wp-content\/uploads\/2019\/02\/Tempco-headers-shell-and-tube-exchangers-1024x599.jpg\" alt=\"testata scambiatore fascio tubiero cogenerazione\" width=\"513\" height=\"300\" srcset=\"https:\/\/www.tempco.it\/blog\/wp-content\/uploads\/2019\/02\/Tempco-headers-shell-and-tube-exchangers-1024x599.jpg 1024w, https:\/\/www.tempco.it\/blog\/wp-content\/uploads\/2019\/02\/Tempco-headers-shell-and-tube-exchangers-300x176.jpg 300w, https:\/\/www.tempco.it\/blog\/wp-content\/uploads\/2019\/02\/Tempco-headers-shell-and-tube-exchangers-768x450.jpg 768w, https:\/\/www.tempco.it\/blog\/wp-content\/uploads\/2019\/02\/Tempco-headers-shell-and-tube-exchangers.jpg 1594w\" sizes=\"(max-width: 513px) 100vw, 513px\" \/><\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Shell and tube heat exchangers in cogeneration plants for heat recovery applications on exhaust at high temperatures coming from endothermic engines.<\/p>\n","protected":false},"author":5,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[79,247,469,61,73,470,63,143,66,87,472,1537],"tags":[387,803,388,254,797,1589,1591,1269,543,145,478,1590,689,1179,1310,429,1334,1485],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v20.5 - 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