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Coupled modeling of a directly heated tubular solar receiver for supercritical carbon dioxide Brayton cycle: Structural and creep-fatigue evaluation

Ortega, Jesus and Khivsara, Sagar and Christian, Joshua and Ho, Clifford and Dutta, Pradip (2016) Coupled modeling of a directly heated tubular solar receiver for supercritical carbon dioxide Brayton cycle: Structural and creep-fatigue evaluation. In: APPLIED THERMAL ENGINEERING, 109 (B). pp. 979-987.

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Official URL: http://dx.doi.org/10.1016/j.applthermaleng.2016.06...

Abstract

A supercritical carbon dioxide (sCO(2)) Brayton cycle is an emerging high energy-density cycle undergoing extensive research due to the appealing thermo-physical properties of sCO(2) and single phase operation. Development of a solar receiver capable of delivering sCO(2) at 20 MPa and 700 degrees C is required for implementation of the high efficiency (similar to 50%) solar powered sCO(2) Brayton cycle. In this work, extensive candidate materials are review along with tube size optimization using the ASME Boiler and Pressure Vessel Code. Temperature and pressure distribution obtained from the thermal-fluid modeling (presented in a complementary publication) are used to evaluate the thermal and mechanical stresses along with detailed creep-fatigue analysis of the tubes. The resulting body stresses were used to approximate the lifetime performance of the receiver tubes. A cyclic loading analysis is performed by coupling the Strain-Life approach and the Larson-Miller creep model. The structural integrity of the receiver was examined and it was found that the stresses can be withstood by specific tubes, determined by a parametric geometric analysis. The creep-fatigue analysis displayed the damage accumulation due to cycling and the permanent deformation on the tubes showed that the tubes can operate for the full lifetime of the receiver. Published by Elsevier Ltd.

Item Type: Journal Article
Additional Information: Copy right for this article belongs to the PERGAMON-ELSEVIER SCIENCE LTD, THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND
Department/Centre: Division of Mechanical Sciences > Mechanical Engineering
Depositing User: Id for Latest eprints
Date Deposited: 07 Jan 2017 09:54
Last Modified: 07 Jan 2017 09:54
URI: http://eprints.iisc.ac.in/id/eprint/55881

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