Experimental investigation of thermal-hydraulic performance of discontinuous fin printed circuit heat exchangers for supercritical CO2 power cycles

Pidaparti, Sandeep; Anderson, Mark; Ranjan, Devesh

doi:10.1016/j.expthermflusci.2019.04.025

Cited by 58 publications

(10 citation statements)

References 18 publications

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“…Because of the difficulty in manufacturing and the difficulty in collecting experimental data, there are few experimental studies on PCHE with airfoil fins. Based on the experimental conditions from near critical point to gas sample area, Pidaparti et al [129] studied the characteristics of discontinuous offset rectangle and NACA 0020 airfoil fin PCHE, and put forward the empirical correlation between Nu and f.…”

Section: Pche With Airfoil Fin Channelsmentioning

confidence: 99%

A Review on the Thermal-Hydraulic Performance and Optimization of Compact Heat Exchangers

Liao

Zhang

et al. 2021

Energies

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Heat exchangers play an important role in power, the chemical industry, petroleum, food and many other industrial productions, while compact heat exchangers are more favored in industrial applications due to their high thermal efficiency and small size. This paper summarizes the research status of different types of compact heat exchangers, especially the research results of heat transfer and pressure drop of printed circuit heat exchangers, so that researchers can have an overall understanding of the development of compact heat exchangers and get the required information quickly. In addition, this paper summarizes and analyzes several main working fluids selected in compact heat exchangers, and puts forward some discussions and suggestions on the selection of working fluids. Finally, according to the existing published literature, the performance evaluation indexes of compact heat exchangers are summarized and compared, which is convenient for developers and researchers to better grasp the design direction.

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Section: Pche With Airfoil Fin Channelsmentioning

confidence: 99%

A Review on the Thermal-Hydraulic Performance and Optimization of Compact Heat Exchangers

Liao

Zhang

et al. 2021

Energies

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“…To operate safely and stably throughout the whole life cycle and fulfill a timely electricity dispatch in a third concentrated power plant, the understanding to the dynamic characteristics of the primary heat exchanger, namely the shell and plate particle-SCO 2 MPBE, is a necessity. Straight channel with offset rectangular fins 32 Nu orfins = 0:1034Re 0:7054 Pr 0:3489 2800 < Re < 32600; 0:8 < Pr…”

Section: Boundary and Initial Conditionsmentioning

confidence: 99%

Dynamic characteristics of a shell and plate particle‐SCO ₂ moving packed bed heat exchanger with various SCO ₂ channel configurations

Yin

Zheng

Zhang

2020

Intl J of Energy Research

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This article proposes a dynamic analysis framework for a shell and plate particle-SCO 2 moving packed bed heat exchanger (MPBE) with straight SCO 2 channel and four fins-modified SCO 2 channels, which contains a static model and a dynamic model. 13 cases covering an initial temperature deviation range of +50 ~−100 K from design-point case in solids inlet, an initial temperature deviation range of +50 ~−100 K from design-point case in SCO 2 inlet, and a SCO 2 inlet velocity range of 1.5 times to 0.05 times are introduced to measure the dynamic characteristics. Dynamic responses of five MPBE configurations to two types of inputs (step-change perturbations and linear-change perturbations) under 13 cases are analyzed. Relaxation times at each case are summarized and compared. A low threshold temperature exists for all five MPBE configurations to avoid oscillations in solids outlet temperature under stepchange perturbations in solids inlet temperature, and a low threshold SCO 2 inlet temperature just appears in MPBE with straight SCO 2 channels under step-change perturbations in SCO 2 inlet temperature. Improved MPBE configurations show apparent less relaxation time than MPBE with straight SCO 2 channel. Among four fins-modified MPBE configurations, MPBE channels modified with offset rectangular fins on SCO 2 side exert the fastest dynamic characteristic in most cases. K E Y W O R D S CSP Gen3, dynamic characteristics, dynamic heat transfer model, particle-SCO 2 moving packed bed heat exchanger | INTRODUCTIONAiming at expediting solar thermal electricity capacity and enhancing solar thermal generation cost competitiveness, research studies concerning the implement of the next generation of concentrated solar power plant (CSP Gen 3) have been gaining colossal vigor recently. [1][2][3] Compared with the first and second CSP plants of which the annual solar-electric efficiency is generally less than 20%, CSP Gen 3 entails the potential to achieve an annual solar-electric efficiency of 25%~30%. 4 The considerable improvement can be ascribed to the elevated peak operating temperature, expecting to be >700 C. Two main technologies matching peak operating temperature Abbreviations: CSP, concentrated solar power plants; MPBE, moving packed bed heat exchanger; SCO 2 , supercritical carbon dioxide; TES, thermal energy storage; PCHE, printed circuit heat exchanger.

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“…The empirical correlations of Nusselt numbers and pressure-drop factors were proposed, which proved that the pressure drop factor of the S-shaped microchannels was 4-5 times less than the zigzag one through a 24-34% reduction in the Nusselt numbers. Pidaparti et al [22] investigated two kinds of discontinuous PCHEs with an offset rectangular and NACA0020 airfoil fin. Empirical correlations for the friction factor and the Nusselt number were proposed, which could match the experimental results.…”

Section: Introductionmentioning

confidence: 99%

Experimental and Numerical Study on Thermal Hydraulic Performance of Trapezoidal Printed Circuit Heat Exchanger for Supercritical CO2 Brayton Cycle

Wang

et al. 2022

Energies

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The supercritical carbon dioxide (sCO2) Brayton cycle is the preferred power cycle for future nuclear energy, fossil energy, solar energy, and other energy systems. As the preferred regenerator in the cycle, the printed circuit heat exchanger (PCHE) exhibits a high heat transfer efficiency, compactness, and robustness. The structure design of its internal flow channel is one of the most important factors to enhance the heat transfer and reduce pressure loss. In the present work, a trapezoidal PCHE prototype is designed and manufactured, and its thermal-hydraulic performance as a regenerator is experimentally studied in the sCO2 test loop. The overall heat transfer coefficient exceeds 1.10 kW/(m2·K) and reaches a maximum of 2.53 kW/(m2·K) with the changes in the inlet temperature, the working pressure, and the mass flow rate. Correlations of the Nusselt numbers are proposed on both sides, with the Reynolds numbers ranging from 10,000 to 30,000 and 4800 to 14,000, and the Prandtl numbers ranging from 0.91 to 1.61 and 0.77 to 0.98 on the cold side and hot side, respectively. The pressure drop of the channels calculated by the peeling method using a single-plate straight prototype is less than 7 kPa and 15 kPa on the hot and the cold side, respectively. The heat recovery efficiency is analyzed to evaluate the performance as a regenerator. Finally, simulation works are carried out to verify the experimental results and expand the Reynolds numbers ranging from 3796 to 30,000 and 1821 to 14,000, on the cold side and hot side, respectively. This work provides the test methods and experimental correlations for the development of an efficient PCHE in the sCO2 Brayton cycle.

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Experimental investigation of thermal-hydraulic performance of discontinuous fin printed circuit heat exchangers for supercritical CO2 power cycles

Cited by 58 publications

References 18 publications

A Review on the Thermal-Hydraulic Performance and Optimization of Compact Heat Exchangers

A Review on the Thermal-Hydraulic Performance and Optimization of Compact Heat Exchangers

Dynamic characteristics of a shell and plate particle‐SCO ₂ moving packed bed heat exchanger with various SCO ₂ channel configurations

Experimental and Numerical Study on Thermal Hydraulic Performance of Trapezoidal Printed Circuit Heat Exchanger for Supercritical CO2 Brayton Cycle

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Experimental investigation of thermal-hydraulic performance of discontinuous fin printed circuit heat exchangers for supercritical CO2 power cycles

Cited by 58 publications

References 18 publications

A Review on the Thermal-Hydraulic Performance and Optimization of Compact Heat Exchangers

A Review on the Thermal-Hydraulic Performance and Optimization of Compact Heat Exchangers

Dynamic characteristics of a shell and plate particle‐SCO 2 moving packed bed heat exchanger with various SCO 2 channel configurations

Experimental and Numerical Study on Thermal Hydraulic Performance of Trapezoidal Printed Circuit Heat Exchanger for Supercritical CO2 Brayton Cycle

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Dynamic characteristics of a shell and plate particle‐SCO ₂ moving packed bed heat exchanger with various SCO ₂ channel configurations