{"id":47204,"date":"2019-11-03T15:07:02","date_gmt":"2019-11-03T14:07:02","guid":{"rendered":"https:\/\/www.thermal-engineering.org\/o-que-e-o-ntu-effectiveness-method-definicao\/"},"modified":"2020-01-22T16:48:32","modified_gmt":"2020-01-22T15:48:32","slug":"o-que-e-o-ntu-effectiveness-method-definicao","status":"publish","type":"post","link":"https:\/\/www.thermal-engineering.org\/pt-br\/o-que-e-o-ntu-effectiveness-method-definicao\/","title":{"rendered":"O que \u00e9 o NTU Effectiveness Method – Defini\u00e7\u00e3o"},"content":{"rendered":"
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No m\u00e9todo NTU (m\u00e9todo do n\u00famero de unidades de transfer\u00eancia), a efic\u00e1cia \u00e9 a raz\u00e3o entre a taxa real de transfer\u00eancia de calor e a taxa m\u00e1xima poss\u00edvel de transfer\u00eancia de calor.\u00a0Engenharia T\u00e9rmica<\/div>\n<\/div>\n
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M\u00e9todo de efic\u00e1cia NTU<\/h2>\n

O\u00a0m\u00e9todo de\u00a0diferen\u00e7a de temperatura m\u00e9dia logar\u00edtmica<\/strong><\/a>\u00a0(LMTD) discutido na se\u00e7\u00e3o anterior \u00e9 f\u00e1cil de usar na an\u00e1lise de trocadores de calor quando as temperaturas de entrada e sa\u00edda dos fluidos quente e frio s\u00e3o conhecidas ou podem ser determinadas a partir de um balan\u00e7o energ\u00e9tico.\u00a0Portanto, o m\u00e9todo LMTD \u00e9 muito adequado para determinar o tamanho e o desempenho de um trocador de calor.<\/p>\n

Quando o conhecimento direto do LMTD n\u00e3o est\u00e1 dispon\u00edvel e o m\u00e9todo NTU (m\u00e9todo\u00a0N\u00famero de unidades de transfer\u00eancia<\/strong>\u00a0) pode ser usado.\u00a0Este m\u00e9todo \u00e9 baseado em um par\u00e2metro sem dimens\u00e3o chamado efetividade da transfer\u00eancia de calor, definido como:<\/p>\n

\"M\u00e9todo<\/a><\/p>\n

Como pode ser visto, a\u00a0efic\u00e1cia<\/em>\u00a0\u00e9 a raz\u00e3o entre a taxa real de transfer\u00eancia de calor e a taxa m\u00e1xima poss\u00edvel de transfer\u00eancia de calor.\u00a0Para definir a efic\u00e1cia de um trocador de calor, devemos primeiro determinar a taxa m\u00e1xima poss\u00edvel de transfer\u00eancia de calor, q\u00a0max<\/sub>\u00a0, para o trocador de calor.<\/p>\n

M\u00e9todo de efic\u00e1cia NTU<\/strong><\/p>\n

Leitura adicional:<\/p>\n

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  1. Fundamentos de transfer\u00eancia de calor e massa, 7\u00aa edi\u00e7\u00e3o.\u00a0Theodore L. Bergman, Adrienne S. Lavine, Frank P. Incropera.\u00a0John Wiley & Sons, Incorporated, 2011. ISBN: 9781118137253.<\/li>\n
  2. Transfer\u00eancia de Calor e Massa.\u00a0Yunus A. Cengel.\u00a0McGraw-Hill Education, 2011. ISBN: 9780071077866.<\/li>\n<\/ol>\n<\/div>\n<\/div>\n
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    ……………………………………………………………………………………………………………………………….<\/p>\n

    Este artigo \u00e9 baseado na tradu\u00e7\u00e3o autom\u00e1tica do artigo original em ingl\u00eas. Para mais informa\u00e7\u00f5es, consulte o artigo em ingl\u00eas. Voc\u00ea pode nos ajudar. Se voc\u00ea deseja corrigir a tradu\u00e7\u00e3o, envie-a para: translations@nuclear-power.com ou preencha o formul\u00e1rio de tradu\u00e7\u00e3o on-line. Agradecemos sua ajuda, atualizaremos a tradu\u00e7\u00e3o o mais r\u00e1pido poss\u00edvel. Obrigado.<\/p>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n","protected":false},"excerpt":{"rendered":"

    No m\u00e9todo NTU (m\u00e9todo do n\u00famero de unidades de transfer\u00eancia), a efic\u00e1cia \u00e9 a raz\u00e3o entre a taxa real de transfer\u00eancia de calor e a taxa m\u00e1xima poss\u00edvel de transfer\u00eancia de calor.\u00a0Engenharia T\u00e9rmica M\u00e9todo de efic\u00e1cia NTU O\u00a0m\u00e9todo de\u00a0diferen\u00e7a de temperatura m\u00e9dia logar\u00edtmica\u00a0(LMTD) discutido na se\u00e7\u00e3o anterior \u00e9 f\u00e1cil de usar na an\u00e1lise de trocadores … Ler mais<\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":[],"categories":[14],"tags":[],"yoast_head":"\nO que \u00e9 o NTU Effectiveness Method - Defini\u00e7\u00e3o<\/title>\n<meta name=\"description\" content=\"No m\u00e9todo NTU (m\u00e9todo do n\u00famero de unidades de transfer\u00eancia), a efic\u00e1cia \u00e9 a raz\u00e3o entre a taxa real de transfer\u00eancia de calor e a taxa m\u00e1xima poss\u00edvel de transfer\u00eancia de calor. 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