4E multi-objective optimization of cold electricity co-generation system based on supercritical CO2 Brayton cycle

Wang, Yiming; Xie, Gongnan

doi:10.1016/j.enconman.2023.116952

Cited by 10 publications

(1 citation statement)

References 25 publications

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“…PCHEs have many desirable qualities, such as (1) a high operating temperature of up to 980 • C; (2) high pressure capabilities of up to 965 bar; (3) a high surface area density at high pressures (1300 m 2 /m 3 at 100 bar); (4) a minimum approach temperature as low as 1 • C; and (5) a high heat exchanger effectiveness of up to 99% [8,9]. Due to these desirable qualities, PCHEs have been designed for applications such as N 2 -and supercritical CO 2 -based Brayton cycles, steam generation for small modular reactors, and waste heat recovery from exhaust gas [10][11][12][13]. However, the PCHE design as a process-intensified reactor unit can be further explored.…”

Section: Introductionmentioning

confidence: 99%

Modelling and Design of a Novel Integrated Heat Exchange Reactor for Oxy-Fuel Combustion Flue Gas Deoxygenation

Ge,

Furlong,

Champagne

et al. 2024

Energies

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The concentration of residual O2 in oxy-fuel combustion flue gas needs to be reduced before CO2 transportation, utilization, or storage. An original application of the printed circuit heat exchanger (PCHE) for catalytic combustion with natural gas (catalytic deoxygenation) is described for reducing the residual O2 concentration. The PCHE design features multiple adiabatic packed beds with interstage cooling and fuel injection, allowing precise control over the reaction extent and temperature within each reaction stage through the manipulation of fuel and utility flow rates. This work describes the design of a PCHE for methane–oxygen catalytic combustion where the catalyst loading is minimized while reducing the O2 concentration from 3 vol% to 100 ppmv, considering a maximum adiabatic temperature rise of 50 °C per stage. Each PCHE design differs by the number of reaction stages and its individual bed lengths. As part of the design process, a one-dimensional transient reduced-order reactor model (1D ROM) was developed and compared to temperature and species concentration axial profiles from 3D CFD simulations. The final design consists of five reaction stages and four heat exchanger sections, providing a PCHE length of 1.09 m at a processing rate of 12.3 kg/s flue gas per m3 PCHE.

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