Stress analysis of channel shell to nozzle junction of high pressure feedwater heater

Abstract

A feedwater heater is a heat exchanger designed to preheat boiler feedwater by means of condensing steam extracted from a steam turbine. High pressure feedwater heater is employed just before the boiler so that, the water fed to the boiler is preheated and at higher pressure. This increases the boiler efficiency as thermal shock is reduced. The aim of the present work is to analyse the junction of Channel shell, which contains the feedwater to nozzle junction. The nozzles are considered as the feedwater inlet and outlet. The analysis methodology opted is according to ASME Section VIII Div.2.