TY - GEN
T1 - Recuperator Transient Simulation for Supercritical Carbon Dioxide Cycle in CSP Applications
AU - Thanganadar, Dhinesh
AU - Fornarelli, Francesco
AU - Camporeale, Sergio
AU - Asfand, Faisal
AU - Patchigolla, Kumar
N1 - Funding Information:
This work was supported by the Biomass and Fossil Fuel Research Alliance (BF2RA), United Kingdom under grant 26-sCO2 for efficient power generation. This work was co-funded by the Erasmus+ programme of the European Union. This work was supported by the Italian Ministry of Education, University and Research under the Programme “Department of Excellence” Legge 232/2016 (Grant No. CUP - D94I18000260001)
Publisher Copyright:
Copyright © 2020 ASME
Copyright:
Copyright 2021 Elsevier B.V., All rights reserved.
PY - 2020/9/21
Y1 - 2020/9/21
N2 - 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.
AB - 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.
KW - Compact heat exchanger
KW - Numerical simulation
KW - SCO2
KW - Supercritical carbon dioxide
KW - Transient simulation
UR - http://www.scopus.com/inward/record.url?scp=85099791999&partnerID=8YFLogxK
U2 - 10.1115/GT2020-14785
DO - 10.1115/GT2020-14785
M3 - Conference contribution
AN - SCOPUS:85099791999
VL - 11
T3 - Proceedings of the ASME Turbo Expo
BT - Structures and Dynamics
PB - American Society of Mechanical Engineers (ASME)
T2 - ASME Turbo Expo 2020: Turbomachinery Technical Conference and Exposition
Y2 - 21 September 2020 through 25 September 2020
ER -
