Recuperator Transient Simulation for Supercritical Carbon Dioxide Cycle in CSP Applications

Dhinesh Thanganadar, Francesco Fornarelli, Sergio Camporeale, Faisal Asfand, Kumar Patchigolla

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

Abstract

Supercritical carbon dioxide (sCO2) cycles are considered to provide a faster response to load change owing to their compact footprint. sCO2 cycles are generally highly recuperative, therefore the response time is mainly dictated by the heat exchanger characteristics. This study model the transient behaviour of a recuperator in 10 MWe simple recuperative Brayton cycle. The response for the variation of inlet temperature and mass flow boundary conditions were investigated using two approaches based on temperature and enthalpy. The performance of these two approaches are compared and the numerical schemes were discussed along with the challenges encountered. The simulation results were validated against the experimental data available in the literature with a fair agreement. The characteristic time of the heat exchanger for a step change of the boundary conditions is reported that supports the recuperator design process. Compact recuperator responded in less than 20 seconds for the changes in the temperature boundary condition whilst it can take upto 1.5 minutes for mass flow change. In order to reduce the computational effort, a logarithmic indexed lookup table approach is presented, reducing the simulation time by a factor of 20.

Original languageEnglish
Title of host publicationStructures and Dynamics
Subtitle of host publicationStructural Mechanics, Vibration, and Damping; Supercritical CO2
PublisherAmerican Society of Mechanical Engineers (ASME)
Number of pages9
Volume11
ISBN (Electronic)9780791884232
DOIs
Publication statusPublished - 21 Sep 2020
Externally publishedYes
EventASME Turbo Expo 2020: Turbomachinery Technical Conference and Exposition - Virtual, Online
Duration: 21 Sep 202025 Sep 2020

Publication series

NameProceedings of the ASME Turbo Expo
Volume11

Conference

ConferenceASME Turbo Expo 2020: Turbomachinery Technical Conference and Exposition
Abbreviated titleGT 2020
CityVirtual, Online
Period21/09/2025/09/20

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