Numerical Fatigue Life Analysis Of Tube And Shell SCO2 Heat Exchanger Across Varying Operating Loads Using Finite Element Method

Putra, Ilham Febrian (2025) Numerical Fatigue Life Analysis Of Tube And Shell SCO2 Heat Exchanger Across Varying Operating Loads Using Finite Element Method. Diploma thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

This study presents a numerical fatigue life analysis of a tube and shell supercritical carbon dioxide (SCO₂) heat exchanger, focusing on the fatigue life behavior under operational stresses, including hoop, axial, and radial stresses. Utilizing Finite Element Analysis (FEA) through ANSYS Static-Structural, the research simulates mechanical stresses in critical tube regions across a range of operating conditions. The operational conditions examined range from 300°C to 800°C in temperature and 8 to 30 MPa in pressure, reflecting the extreme environments in typical nuclear power generation systems. The primary goal is to validate the last research design and analyze the influence of varying operating loads and pipe thickness on fatigue performance that occurs in the tube and shell SCO2 Heat Exchanger. And the result shows that cyclic thermal loading has the most significant impact on the fatigue life of the tube section in the heat exchanger and cyclic pressure loading does not have a notable effect on the tube's fatigue life, as the resulting stress remains within the material’s endurance limit and does increasing the tube thickness helps reduce fatigue effects that caused by hoop stress.

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Penelitian ini meneliti kegagalan yang dialami oleh tube and shell Supercritical Carbon dioxide (SCO2) heat exchanger dalam pembebanan siklik yang dipengaruhi oleh hoop, axial, serta radial stress. Menggunakan metode Finite Element Analysis (FEA) dalam simulasi ANSYS Static-Structural, penelitian mensimulasikan mechanical stress yang terjadi di bagian kritis heat exchanger. Simulasi kondisi operasional akan meniru seperti dikeadaan sebenarnya dalam penggunaan di sistem pembangkit listrik tenaga nuklir. Temperatur akan divariasi dari 300°C hingga 800°C dan tekanan dari 8 hingga 30 MPa. Tujuan Utama adalah untuk memvalidasi desain penelitian terakhir dan menganalisis pengaruh variasi operating loads dan ketebalan pipa terhadap Fatigue Life yang terjadi di tube and shell SCO2 Heat Exchanger. Hasil penelitian menunjukkan bahwa beban termal siklik memiliki dampak paling signifikan terhadap umur kelelahan pada bagian tube side. sedangkan pembeban tekanan siklik tidak memiliki efek yang signifikan terhadap umur kelelahan tabung, karena tegangan yang dihasilkan tetap berada dalam batas ketahanan material. Selain itu, peningkatan ketebalan tabung dapat membantu mengurangi efek kelelahan yang disebabkan oleh hoop stress.

Item Type:	Thesis (Diploma)
Uncontrolled Keywords:	Supercritical Carbon Dioxide, Tube and Shell, Heat Exchanger, Fatigue Life, Mechanical Stress,Supercritical Carbon Dioxide, Tube and Shell, Heat Exchanger, Fatigue Life, Mechanical Stress
Subjects:	T Technology > TJ Mechanical engineering and machinery > TJ164 Power plants--Design and construction T Technology > TJ Mechanical engineering and machinery > TJ263 Heat exchangers
Divisions:	Faculty of Vocational > Mechanical Industrial Engineering (D4)
Depositing User:	Ilham Febrian Putra
Date Deposited:	05 Aug 2025 02:09
Last Modified:	05 Aug 2025 02:10
URI:	http://repository.its.ac.id/id/eprint/126959

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