{"id":5590,"date":"2016-04-26T10:31:11","date_gmt":"2016-04-26T08:31:11","guid":{"rendered":"https:\/\/www.tempco.it\/blog\/?p=5590"},"modified":"2016-04-18T17:50:20","modified_gmt":"2016-04-18T15:50:20","slug":"troppe-piastre","status":"publish","type":"post","link":"https:\/\/www.tempco.it\/blog\/5590\/troppe-piastre\/","title":{"rendered":"Troppe piastre!"},"content":{"rendered":"<p>Titolo amletico, per un argomento interessante.<\/p>\n<p>Spesso quando progettiamo gli scambiatori a piastre ci viene richiesto di abbondare nel sovradimensionamento, per essere sicuri che lo <a href=\"http:\/\/www.tempco.it\/soluzioni\/scambiatori-di-calore\/\">scambiatore<\/a> poi possa fornire le performance adeguate, anche in caso di sporcamento.<\/p>\n<p>Spesso per\u00f2 questo <strong>extra margine ha delle controindicazioni<\/strong>.<\/p>\n<p>Infatti un eccessivo sovradimensionamento, porta ad una diminuzione delle <a href=\"https:\/\/www.tempco.it\/blog\/3298\/velocita-dei-fluidi-negli-scambiatori-quando-andare-piano\/\">velocit\u00e0 dei fluidi<\/a> nei canali nello scambiatore a piastre.<\/p>\n<p>Il calo della velocit\u00e0 comporta due fattori negativi:<\/p>\n<ul>\n<li>minore turbolenza, ovvero minore <strong><a href=\"https:\/\/www.tempco.it\/blog\/283\/scambiatori-di-calore-coefficienti-di-scambio-e-velocita-tipiche-dei-fluidi\/\">coefficiente di scambio<\/a><\/strong> e quindi\u00a0maggiore sporcamento, in quanto viene meno l&#8217;effetto di trascinamento da parte del flusso, nei confronti delle particelle<\/li>\n<li>cattiva distribuzione del fluido, che passa per canali preferenziali, scambiando il calore in modo inefficiente<\/li>\n<\/ul>\n<p><a href=\"https:\/\/www.tempco.it\/blog\/wp-content\/uploads\/2016\/04\/20160413_104847-2.jpg\"><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter size-medium wp-image-5591\" src=\"https:\/\/www.tempco.it\/blog\/wp-content\/uploads\/2016\/04\/20160413_104847-2-169x300.jpg\" alt=\"Piastre sporche per bassa velocit\u00e0\" width=\"169\" height=\"300\" srcset=\"https:\/\/www.tempco.it\/blog\/wp-content\/uploads\/2016\/04\/20160413_104847-2-169x300.jpg 169w, https:\/\/www.tempco.it\/blog\/wp-content\/uploads\/2016\/04\/20160413_104847-2-576x1024.jpg 576w\" sizes=\"auto, (max-width: 169px) 100vw, 169px\" \/><\/a><\/p>\n<p>Quando si riscontrano queste implicazioni, la prima prova che conviene effettuare \u00e8 <strong>diminuire drasticamente il numero di piastre<\/strong>, compatibilmente con le caratteristiche della pompa e dei fluidi. Si dovrebbero vedere immediatamente i benefici.<\/p>\n<p style=\"text-align: center;\"><a href=\"https:\/\/www.tempco.it\/blog\/wp-content\/uploads\/2016\/04\/20160413_103323-2.jpg\"><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter size-medium wp-image-5592\" src=\"https:\/\/www.tempco.it\/blog\/wp-content\/uploads\/2016\/04\/20160413_103323-2-300x169.jpg\" alt=\"Piastre sporche per bassa velocit\u00e0\" width=\"300\" height=\"169\" srcset=\"https:\/\/www.tempco.it\/blog\/wp-content\/uploads\/2016\/04\/20160413_103323-2-300x169.jpg 300w, https:\/\/www.tempco.it\/blog\/wp-content\/uploads\/2016\/04\/20160413_103323-2-1024x576.jpg 1024w\" sizes=\"auto, (max-width: 300px) 100vw, 300px\" \/><\/a><\/p>\n<p>Vorrei in ogni caso aggiungere, che \u00e8 molto importante riuscire ad avere tutti i dati relativi ai fluidi, portate, pressioni e temperature, in modo da progettare correttamente lo scambiatore gi\u00e0 dal principio&#8230;e ricordate che lo scambiatore a piastre si pu\u00f2 sempre ampliare in un secondo tempo.<\/p>\n<p>&nbsp;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Titolo amletico, per un argomento interessante. Spesso quando progettiamo gli scambiatori a piastre ci viene richiesto di abbondare nel sovradimensionamento, [&hellip;]<\/p>\n","protected":false},"author":3,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[49,9],"tags":[465,317,529,464,204,117],"class_list":["post-5590","post","type-post","status-publish","format-standard","hentry","category-scambiatori-a-piastre","category-scambiatori-di-calore","tag-guarnizioni","tag-piastre","tag-rigenerazione","tag-scambiatore-a-piastre","tag-scambiatori","tag-scambiatori-a-piastre-2"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.6 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Troppe piastre! - Tempco Blog<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.tempco.it\/blog\/5590\/troppe-piastre\/\" \/>\n<meta property=\"og:locale\" content=\"it_IT\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Troppe piastre! - Tempco Blog\" \/>\n<meta property=\"og:description\" content=\"Titolo amletico, per un argomento interessante. 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