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Performance analysis of heat exchangers with enhanced heat transfer surfaces under fouling conditions
Języki publikacji
Abstrakty
Analizie poddano wpływ procesu osadzania się zanieczyszczeń na rozwiniętych powierzchniach wewnętrznych rur, szczególnie rur z wkładkami ze skręconej taśmy na wymianę ciepła. Osadzanie się niepożądanych cząstek zanieczyszczeń na powierzchniach wymiennika ciepła może powodować zwiększenie oporów cieplnych, a przez to redukować natężenie wymiany ciepła. Rosną także opory przepływu przez wymiennik. Jak wynika z badań osady powstają na wszystkich elementach wymiennika, także na wkładkach wewnątrz rury. Grubość warstwy osadu jest inna na różnych częściach wymiennika, także rodzaj osadzania jest odmienny. Warunki działania wymiennika, takie jak temperatura, przerywana praca, czas, prędkość przepływu, wibracje mają wpływ na osadzanie zanieczyszczeń.
Fouling process has been analyzed with special attention to enhanced heat transfer surfaces, like inner tube surfaces especially with twisted tape inserts. Fouling deposits formed on heat transfer surfaces have a low thermal conductivity and their presence reduces the equipment efficiency. Pressure drop characteristics of a heat exchanger are also disturbed. Fouling deposits arę present on all elements of an exchanger including twisted tape inserts. Thickness of a deposit layer differs for various places inside an exchanger, also different types of fouling may occur. Heat exchanger working conditions, like temperature, interrupted work, time, flow velocity, vibration have an influence on fouling.
Wydawca
Rocznik
Tom
Strony
12--18
Opis fizyczny
Bibliogr. 35 poz., rys., tab.
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autor
autor
autor
autor
- Politechnika Łódzka Katedra Techniki Cieplnej i Chłodnictwa
Bibliografia
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Typ dokumentu
Bibliografia
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bwmeta1.element.baztech-article-BPG8-0036-0008