Performance improvement of supercritical carbon dioxide power cycles through its integration with bottoming heat recovery cycles and advanced heat exchanger design: A review

2020 ◽  
Vol 44 (9) ◽  
pp. 7108-7135 ◽  
Author(s):  
Ramy H. Mohammed ◽  
Ali Sulaiman Alsagri ◽  
Xiaolin Wang
Keyword(s):  
Carbon Dioxide ◽  
Heat Exchanger ◽  
Supercritical Carbon Dioxide ◽  
Performance Improvement ◽  
Heat Recovery ◽  
Power Cycles ◽  
Heat Exchanger Design ◽  
Recovery Cycles ◽  
Supercritical Carbon

Supercritical Carbon Dioxide Heat Transfer in Horizontal Semicircular Channels

2012 ◽  
Vol 134 (8) ◽  
Author(s):  
Alan Kruizenga ◽  
Hongzhi Li ◽  
Mark Anderson ◽  
Michael Corradini
Keyword(s):  
Heat Transfer ◽  
Carbon Dioxide ◽  
Heat Exchanger ◽  
Supercritical Carbon Dioxide ◽  
Turbulent Heat Transfer ◽  
Turbulent Heat ◽  
Brayton Cycle ◽  
Heat Exchanger Design ◽  
Transfer Behavior ◽  
Supercritical Carbon

Competitive cycles must have a minimal initial cost and be inherently efficient. Currently, the supercritical carbon dioxide (S-CO2) Brayton cycle is under consideration for these very reasons. This paper examines one major challenge of the S-CO2 Brayton cycle: the complexity of heat exchanger design due to the vast change in thermophysical properties near a fluid’s critical point. Turbulent heat transfer experiments using carbon dioxide, with Reynolds numbers up to 100 K, were performed at pressures of 7.5–10.1 MPa, at temperatures spanning the pseudocritical temperature. The geometry employed nine semicircular, parallel channels to aide in the understanding of current printed circuit heat exchanger designs. Computational fluid dynamics was performed using FLUENT and compared to the experimental results. Existing correlations were compared, and predicted the data within 20% for pressures of 8.1 MPa and 10.2 MPa. However, near the critical pressure and temperature, heat transfer correlations tended to over predict the heat transfer behavior. It was found that FLUENT gave the best prediction of heat transfer results, provided meshing was at a y+ ∼ 1.

Fluidized Bed Particle Heat Exchanger for Supercritical Carbon Dioxide Power Cycles

2016 ◽  
Author(s):  
Peter Steiner ◽  
Karl Schwaiger ◽  
Heimo Walter ◽  
Markus Haider ◽  
Martin Hämmerle
Keyword(s):  
Carbon Dioxide ◽  
Heat Exchanger ◽  
Supercritical Carbon Dioxide ◽  
Power Plants ◽  
Design Parameters ◽  
Main Concept ◽  
Power Cycles ◽  
Power Cycle ◽  
Utility Scale ◽  
Supercritical Carbon

Numerous studies in the field of power generation deal with efficiency and flexibility enhancement of power plants. Supercritical carbon dioxide (sCO2) power cycles promise significantly higher efficiencies and very compact constructions compared to conventional Rankine cycles. An opportunity to increase the flexibility of such power cycles, is the integration of Thermal Energy Storage (TES) systems into the process. In this work the sandTES technology, a particle based TES system is introduced, which can be used to improve the load change characteristics of power plants even at highest temperatures. After introducing the main concept and the key technologies of the sandTES technology, a utility scale heat exchanger for implementation in a high temperature sCO2 power cycle is presented and discussed. Finally crucial design parameters of the presented heat exchanger (HEX) are outlined as well as their influences on the HEX dimensions are discussed.

ATHLET extensions for the simulation of supercritical carbon dioxide driven power cycles

Kerntechnik ◽  
2019 ◽  
Vol 84 (5) ◽  
pp. 390-396 ◽  
Author(s):  
M. Hofer ◽  
M. Buck ◽  
J. Starflinger
Keyword(s):  
Carbon Dioxide ◽  
Supercritical Carbon Dioxide ◽  
Power Cycles ◽  
Supercritical Carbon

scholarly journals DESIGN OF A 1 MWTH SUPERCRITICAL CARBON DIOXIDE PRIMARY HEAT EXCHANGER TEST SYSTEM

2020 ◽  
pp. 1-34
Author(s):  
Matthew Carlson ◽  
Francisco Alvarez
Keyword(s):  
Carbon Dioxide ◽  
Heat Exchanger ◽  
Supercritical Carbon Dioxide ◽  
Technology Development ◽  
Ambient Air ◽  
Test System ◽  
Department Of Energy ◽  
Working Fluid ◽  
Levelized Cost Of Electricity ◽  
Supercritical Carbon

Abstract A new generation of Concentrating Solar Power (CSP) technologies is under development to provide dispatchable renewable power generation and reduce the levelized cost of electricity (LCOE) to 6 cents/kWh by leveraging heat transfer fluids (HTF) capable of operation at higher temperatures and coupling with higher efficiency power conversion cycles. The U.S. Department of Energy (DOE) has funded three pathways for Generation 3 CSP (Gen3CSP) technology development to leverage solid, liquid, and gaseous HTFs to transfer heat to a supercritical carbon dioxide (sCO2) Brayton cycle. This paper presents the design and off-design capabilities of a 1 MWth sCO2 test system that can provide sCO2 coolant to the primary heat exchangers (PHX) coupling the high-temperature HTFs to the sCO2 working fluid of the power cycle. This system will demonstrate design, performance, lifetime, and operability at a scale relevant to commercial CSP. A dense-phase high pressure canned motor pump is used to supply up to 5.3 kg/s of sCO2 flow to the primary heat exchanger at pressures up to 250 bar and temperatures up to 715 °C with ambient air as the ultimate heat sink. Key component requirements for this system are presented in this paper.

scholarly journals Design and dynamic modeling of printed circuit heat exchangers for supercritical carbon dioxide Brayton power cycles

2018 ◽  
Vol 231 ◽  
pp. 1019-1032 ◽  
Author(s):  
Yuan Jiang ◽  
Eric Liese ◽  
Stephen E. Zitney ◽  
Debangsu Bhattacharyya
Keyword(s):  
Carbon Dioxide ◽  
Supercritical Carbon Dioxide ◽  
Dynamic Modeling ◽  
Heat Exchangers ◽  
Power Cycles ◽  
Printed Circuit ◽  
Supercritical Carbon
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