CFD simulations of heat transfer in internally helically ribbed tubes

• Autorzy: Majewski K. , Grądziel S.

Identyfikatory

DOI

10.1515/cpe-2016-0020

• Języki publikacji: EN

Abstrakty

EN

Heating surfaces in power boilers are exposed to very high hea t flux. For evaporator protection against overheating, internally helically ribbed tubes are used. The intensification of the heat transfer and the maintenance of the thin water layer in the intercostal space, using ribbed tubes, enables better protection of the power boiler evaporator than smooth pipes. Extended inner surface changes flow and thermal conditions by influencing the linear pressure drop and heat transfer coefficient. This paper presents equations that are used to determine the heat transfer coefficient. The results of total heat transfer, obtained from CFD simulations, for two types of internally ribbed and plain tubes are also presented.

Słowa kluczowe

EN

heat transfer coefficient; helically internally ribbed tube; power boiler

PL

współczynnik przenikania ciepła; rura spiralna wewnątrz prążkowana; kocioł

• Wydawca: Komitet Inżynierii Chemicznej i Procesowej Polskiej Akademii Nauk
• Czasopismo: Chemical and Process Engineering
• Rocznik: 2016
• Tom: Vol. 37, nr 2
• Strony: 251--260
• Opis fizyczny: Bibliogr. 22 poz., rys., tab.

Twórcy

autor

Majewski K.

• Cracow University of Technology, al. Jana Pawla II 37, 31-864 Cracow, Poland

autor

Grądziel S.

• Cracow University of Technology, al. Jana Pawla II 37, 31-864 Cracow, Poland

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