{"id":10962,"date":"2024-08-27T09:05:01","date_gmt":"2024-08-27T07:05:01","guid":{"rendered":"https:\/\/firebox.com.ua\/?p=10962"},"modified":"2024-08-27T09:06:24","modified_gmt":"2024-08-27T07:06:24","slug":"poteri-dymovyh-gazov","status":"publish","type":"post","link":"https:\/\/firebox.com.ua\/ro\/poteri-dymovyh-gazov\/","title":{"rendered":"Pierderi de gaze arse (defini\u021bie)"},"content":{"rendered":"

Pierderile de gaze arse<\/strong> - acestea sunt pierderile de c\u0103ldur\u0103 care apar \u00een timpul arderii combustibilului \u00een cazan<\/a>, c\u00e2nd o parte din c\u0103ldur\u0103 pleac\u0103 \u00eempreun\u0103 cu gazele de ardere prin co\u0219 f\u0103r\u0103 a fi transferat\u0103 la lichidul de r\u0103cire. Aceste pierderi sunt unul dintre principalele cauze ale sc\u0103derii randamentului (coeficientului de performan\u021b\u0103) al cazanului.<\/p>\n

Pierderile de gaze arse: aspecte principale<\/h3>\n
    \n
  • Mecanism de pierdere<\/strong>:\n
      \n
    • \u00cenc\u0103lze\u0219te frunzele cu gaze<\/strong>: Arderea combustibilului produce gaze de ardere care, fiind fierbinti, contin o cantitate importanta de energie termica. Dac\u0103 aceast\u0103 energie nu are timp s\u0103 fie transferat\u0103 \u00een lichidul de r\u0103cire (ap\u0103, aer etc.), ea se pierde odat\u0103 cu gazele care ies prin co\u0219.<\/li>\n
    • Temperatura gazelor de ardere<\/strong>: Cu c\u00e2t temperatura gazelor de ardere este mai mare, cu at\u00e2t se pierde mai mult\u0103 c\u0103ldur\u0103 \u0219i, \u00een consecin\u021b\u0103, cu at\u00e2t rata de pierdere este mai mare.<\/li>\n<\/ul>\n<\/li>\n
    • Impactul asupra eficien\u021bei<\/strong>:\n
        \n
      • Sc\u0103derea eficien\u021bei<\/strong>: Pierderile mari de c\u0103ldur\u0103 din gazele de ardere reduc randamentul cazanului, ceea ce se reflect\u0103 \u00eentr-o sc\u0103dere a randamentului acestuia. Aceasta \u00eenseamn\u0103 c\u0103 va fi consumat mai mult combustibil pentru a men\u021bine un anumit nivel de c\u0103ldur\u0103.<\/li>\n
      • Dependen\u021b\u0103 de set\u0103rile cazanului<\/strong>: Set\u0103rile incorecte ale cazanului (de exemplu, temperatura gazelor arse prea ridicate) pot cre\u0219te pierderile \u0219i pot reduce randamentul.<\/li>\n<\/ul>\n<\/li>\n
      • Factori care influen\u021beaz\u0103 pierderile de gaze arse<\/strong>:\n
          \n
        • Temperatura \u0219i viteza gazelor de ardere<\/strong>: Eliberarea rapida a gazelor fierbinti prin cosul de fum reduce timpul de contact al acestora cu schimbatorul de caldura, reducand transferul de caldura.<\/li>\n
        • Calitatea combustibilului<\/strong>: Combustibilul ars incomplet cre\u0219te volumul \u0219i temperatura gazelor de ardere, cresc\u00e2nd pierderile de c\u0103ldur\u0103.<\/li>\n
        • Eficien\u021ba schimb\u0103torului de c\u0103ldur\u0103<\/strong>: Dac\u0103 schimb\u0103torul de c\u0103ldur\u0103 nu transfer\u0103 c\u0103ldura de la gazele de ardere la lichidul de r\u0103cire suficient de eficient, acest lucru va cre\u0219te \u0219i pierderile de c\u0103ldur\u0103.<\/li>\n<\/ul>\n<\/li>\n
        • Metode de reducere a pierderilor<\/strong>:\n
            \n
          • Cazane in condensare<\/strong>: Folosesc caldura de condensare a vaporilor de apa continuta in gazele de ardere, ceea ce permite ca o parte din caldura sa fie returnata inapoi in sistem si creste eficienta.<\/li>\n
          • Reglarea trac\u021biunii<\/strong>: Optimizarea tirajului \u00een co\u0219 pentru a reduce rata de ie\u0219ire a gazelor \u0219i a cre\u0219te transferul termic al acestora.<\/li>\n
          • Utilizarea economizoarelor<\/strong>: Aceste dispozitive sunt instalate la iesirea din cazan si permit recuperarea caldurai ramase a gazelor de ardere, returnand-o in sistem.<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n

            Pierderile de gaze de ardere sunt un factor important care afecteaz\u0103 pierderile de c\u0103ldur\u0103 \u0219i eficien\u021ba general\u0103 a cazanului. Minimizarea acestor pierderi prin reglarea corect\u0103 a cazanului, utilizarea schimb\u0103toarelor de c\u0103ldur\u0103 foarte eficiente \u0219i a tehnologiilor moderne, cum ar fi cazanele \u00een condensare, ajut\u0103 la cre\u0219terea semnificativ\u0103 a eficien\u021bei sistemelor de \u00eenc\u0103lzire.<\/p>","protected":false},"excerpt":{"rendered":"

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