Title: Energy and exergy analyses of pressurised water reactors and a new model of U-tube steam generators

Authors: Huseyin Emre Sahin; Harun Kemal Ozturk

Addresses: Mechanical Engineering Department, Pamukkale University, Denizli, Turkey ' Mechanical Engineering Department, Pamukkale University, Denizli, Turkey

Abstract: Energy and exergy analyses have been performed for thermodynamic performance analysis for pressurised water reactors (PWR) and a new model of U-tube steam generators (UTSG). Exergy destruction and efficiency have been obtained and compared for each component of typical PWR and all nodes of the developed UTSG model. Changes in primary inlet flow rate, feedwater inlet temperature, primary inlet temperature and U-tubes diameter ratio have been investigated and the response of the generator has been presented with the developed model. In PWR analysis, most exergy destruction rate has been in reactor (61.80%), condenser (14.27%) and turbines (8.28%). In UTSG analysis, exergy destruction rate has been greater in downcomer (47.72%) and boiling region nodes.

Keywords: exergy; pressurised water reactors; PWR; U-tube steam generators; UTSG; two-phase heat exchangers.

DOI: 10.1504/IJEX.2025.147637

International Journal of Exergy, 2025 Vol.47 No.3, pp.233 - 244

Received: 28 Feb 2025
Accepted: 13 Apr 2025
Published online: 24 Jul 2025 *

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