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A Model for Predicting the Steady-state Thermal-hydraulics of the Once-through Power Boilers

DOI: 10.1615/ICHMT.1981.AdvCourseHeatExch.470
pages 747-756

Giovanni Del Tin
Istituto di Fisica Tecnica e Impianti Nucleari, Politecnico di Torino, Turin, Italy

Mario Malandrone
Istituto di Fisica Tecnica e Impianti Nucleari, Politecnico di Torino, Turin, Italy

Bruno Panella
Politecnico di Torino

G. Pedrelli
ENEL-Ente Nazionale Energia Elettrica, Centro Ricerca Termica e Nucleare, Pisa, Italy

Abstract

An analytical model to predict the steady-state water side thermal-hydraulic parameters for the furnace of the once-through forced flow power boilers at subcritical pressure is proposed. The model predicts, at a given heat flux distribution, the pressure drops, the flow-rate distribution in the tube-banks, and the boiling crisis in the ribbed and in the commercially rough tubes of the furnace panels. A set of the model predicted pressure drops shows a fairly good agreement between the calculated and the experimental operative conditions values .

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