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Design, Stress Analysis and Operating Experience in Feedwater Heaters
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The performance of feedwater heaters has a direct bearing on the thermal efficiency of the plant. A typical feedwater heater may have three distinct regions of heat transfer, namely desuperheating, condensing and subcooling zones. The design challenges attendant on successful heat transfer in each zone are summarized in the paper. Deficiencies in the current design codes and standards are also discussed. The paper draws heavily from the proceedings of the Feedwater Heater Workshop edited by Libs and Singh. In addition to focusing attention on the state-of-the art technology deficiencies, the paper also offers some remedial measures for improved design. The final segment of the paper gives a synopsis of the most commonly reported operating problems. A diagnosis of the troubles is also presented to aid a prospective designer or user in avoiding a repetition of past mistakes.
Singh, K. P.; Libs, T. (1980). Design, Stress Analysis and Operating Experience in Feedwater Heaters. Energy Systems Laboratory (http://esl.tamu.edu); Texas A&M University (http://www.tamu.edu). Available electronically from