{"id":47308,"date":"2019-11-03T23:32:32","date_gmt":"2019-11-03T22:32:32","guid":{"rendered":"https:\/\/www.thermal-engineering.org\/o-que-e-cabeca-de-conducao-termica-definicao\/"},"modified":"2020-01-23T10:35:35","modified_gmt":"2020-01-23T09:35:35","slug":"o-que-e-cabeca-de-conducao-termica-definicao","status":"publish","type":"post","link":"https:\/\/www.thermal-engineering.org\/pt-br\/o-que-e-cabeca-de-conducao-termica-definicao\/","title":{"rendered":"O que \u00e9 cabe\u00e7a de condu\u00e7\u00e3o t\u00e9rmica – Defini\u00e7\u00e3o"},"content":{"rendered":"
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Cabe\u00e7a de acionamento t\u00e9rmico \u00e9 a for\u00e7a que causa a circula\u00e7\u00e3o natural.\u00a0\u00c9 causada pela diferen\u00e7a de densidade entre dois corpos ou \u00e1reas de fluido.\u00a0Engenharia T\u00e9rmica<\/div>\n<\/div>\n
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Cabe\u00e7a de condu\u00e7\u00e3o t\u00e9rmica<\/h2>\n

Cabe\u00e7a de acionamento t\u00e9rmico<\/strong>\u00a0\u00e9 a for\u00e7a que causa\u00a0a circula\u00e7\u00e3o natural<\/strong>\u00a0.\u00a0\u00c9 causada pela diferen\u00e7a de\u00a0densidade<\/a>\u00a0entre dois corpos ou \u00e1reas de fluido.\u00a0Considere dois volumes iguais do mesmo tipo de fluido.\u00a0Se os dois volumes n\u00e3o estiverem na mesma\u00a0temperatura<\/a>\u00a0, o\u00a0volume<\/a>\u00a0com a temperatura mais alta tamb\u00e9m ter\u00e1 uma densidade mais baixa e, portanto, menos massa.\u00a0Sabe-se que a densidade de gases e l\u00edquidos depende da temperatura, geralmente diminuindo (devido \u00e0 expans\u00e3o do fluido) com o aumento da temperatura.\u00a0Como o volume a uma temperatura mais alta ter\u00e1 uma\u00a0massa<\/a>\u00a0menor, tamb\u00e9m ter\u00e1 menos for\u00e7a exercida sobre ele pela gravidade.\u00a0Essa diferen\u00e7a na for\u00e7a da gravidade exercida sobre o fluido tender\u00e1 a fazer com que o fluido mais quente suba e o fluido mais frio afunde.\u00a0A cabe\u00e7a de acionamento t\u00e9rmico<\/strong>\u00a0pode ser simplesmente calculada usando a diferen\u00e7a de press\u00f5es hidrost\u00e1ticas:<\/p>\n

\"cabe\u00e7a<\/a><\/p>\n

Como pode ser visto, quanto maior a diferen\u00e7a de temperatura entre as \u00e1reas quentes e frias do fluido, maior a\u00a0cabe\u00e7a de acionamento t\u00e9rmico<\/strong> e a vaz\u00e3o resultante.<\/p>\n<\/div>\n<\/div>\n

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Circula\u00e7\u00e3o Natural – Vaz\u00e3o<\/h2>\n

A<\/strong>\u00a0taxa de fluxo de\u00a0circula\u00e7\u00e3o natural<\/strong>\u00a0no circuito, em estado estacion\u00e1rio, \u00e9 determinada a partir do\u00a0equil\u00edbrio<\/strong>\u00a0entre as\u00a0for\u00e7as\u00a0<\/strong>motriz<\/strong>\u00a0e\u00a0resist\u00eancia<\/strong>\u00a0.\u00a0A for\u00e7a motriz resulta da diferen\u00e7a de densidade entre a perna quente e a perna fria do circuito.\u00a0A cabe\u00e7a necess\u00e1ria para compensar as perdas de cabe\u00e7a \u00e9 criada por gradientes de densidade e altera\u00e7\u00f5es de eleva\u00e7\u00e3o.<\/p>\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","protected":false},"excerpt":{"rendered":"

Cabe\u00e7a de acionamento t\u00e9rmico \u00e9 a for\u00e7a que causa a circula\u00e7\u00e3o natural.\u00a0\u00c9 causada pela diferen\u00e7a de densidade entre dois corpos ou \u00e1reas de fluido.\u00a0Engenharia T\u00e9rmica Cabe\u00e7a de condu\u00e7\u00e3o t\u00e9rmica Cabe\u00e7a de acionamento t\u00e9rmico\u00a0\u00e9 a for\u00e7a que causa\u00a0a circula\u00e7\u00e3o natural\u00a0.\u00a0\u00c9 causada pela diferen\u00e7a de\u00a0densidade\u00a0entre dois corpos ou \u00e1reas de fluido.\u00a0Considere dois volumes iguais do mesmo tipo … 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 cabe\u00e7a de condu\u00e7\u00e3o t\u00e9rmica - Defini\u00e7\u00e3o<\/title>\n<meta name=\"description\" content=\"Cabe\u00e7a de acionamento t\u00e9rmico \u00e9 a for\u00e7a que causa a circula\u00e7\u00e3o natural. \u00c9 causada pela diferen\u00e7a de densidade entre dois corpos ou \u00e1reas de fluido. 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