Thermal performance of heterogeneous PCHE for supercritical CO2 energy cycle

Jeon, Sang-Woo; Baik, Young-Jin; Byon, Chan; Kim, Woojin

doi:10.1016/j.ijheatmasstransfer.2016.06.091

Cited by 88 publications

(14 citation statements)

References 24 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In addition, supercritical fluids can be used to improve heat transfer performance due to their favorable properties, like high density, low viscosity, and high thermal conductivity compared to conventional fluids [20]. Most studies on the flow and heat transfer characteristics of fluids in PCHE have been conducted using helium and water [21][22][23], and many researchers also used supercritical water and supercritical carbon dioxide to investigate PCHEs [24,25]. However, studies on the heat transfer performance of supercritical LNG in zigzag PCHE under low temperature and high pressure conditions are rare [16].…”

Section: Introductionmentioning

confidence: 99%

Numerical Study on Thermal Hydraulic Performance of Supercritical LNG in Zigzag-Type Channel PCHEs

Zhao

Zhou

et al. 2019

Energies

View full text Add to dashboard Cite

In this paper, we study a promising plate-type heat exchanger, the printed circuit heat exchanger (PCHE), which has high compactness and is suitable for high-pressure conditions as a vaporizer during vaporization. The thermal hydraulic performance of supercritical produce liquefied natural gas (LNG) in the zigzag channel of PCHE is numerically investigated using the SST κ-ω turbulence model. The thermo-physical properties of supercritical LNG from 6.5 MPa to 10MPa were calculated using piecewise-polynomial approximations of the temperature. The effect of the channel bend angle, mass flux and inlet pressure on local convection heat transfer coefficient, and pressure drop are discussed. The heat transfer and pressure loss performance are evaluated using the Nusselt and Euler numbers. Nu/Eu is proposed to evaluate the comprehensive heat transfer performance of PCHE by considering the heat transfer and pressure drop characteristics to find better bend angle and operating conditions. The supercritical LNG has a better heat transfer performance when bend angle is less than 15° with the mass flux ranging from 207.2 kg/(m2·s) to 621.6 kg/(m2·s), which improves at bend angle of 10° and lower compared to 15° at mass flux above 414.4 kg/(m2·s). The heat transfer performance is better at larger mass flux and lower operating pressures.

show abstract

Section: Introductionmentioning

confidence: 99%

Numerical Study on Thermal Hydraulic Performance of Supercritical LNG in Zigzag-Type Channel PCHEs

Zhao

Zhou

et al. 2019

Energies

View full text Add to dashboard Cite

show abstract

“…Xu et al [13] carried out optimization research on heat transfer characteristics of airfoil fins PCHE. Jeon et al [14] creatively presented the heterogeneous PCHE, for which the effects of channel size and the cross-section shape were numerically investigated.…”

Section: Introductionmentioning

confidence: 99%

Numerical investigation on thermal performance and flow characteristics of Z and S shape printed circuit heat exchanger using S-CO2

2019

View full text Add to dashboard Cite

As a high-efficiency compact heat exchanger, the printed circuit heat exchanger has been widely applied into nuclear reactor and energy industry. In the present paper, the thermal hydraulic performance of printed circuit heat exchanger based on S-CO 2 Brayton power cycle has been numerically investigated for various channel shape and bend angle. A total of seven different shaped channels including straight, Z-10, Z-20, Z-30, S-10, S-20, S-30 are modeled, and evaluated according to the heat transfer and friction performances within the Reynolds number of 5000-30000. The inlet temperature/outlet pressure of hot channel and cold channel are 553 K/2.6 MPa and 381 K/8.5 MPa, respectively. The flow patterns, average Nusselt number, friction factor, and heat exchanger effectiveness are obtained. On the comprehensive consideration of heat transfer enhancement and friction, the S-20 channel produces the best thermal performance. This investigation has provided important reference data for the design of advanced printed circuit heat exchanger in the energy industry.

show abstract

“…Also, a numerical model of semicircular ducts was established, and the numerical analysis of laminar flow with fluid dynamics development and fully developed hydrodynamics was performed. Jeon et al investigated the thermal performance of a heterogeneous type PCHE numerically and analyzed the effects of the channel sizes of hot and cold sides, channels spacing, and channel cross‐sectional shape on the thermal performance of PCHE. Kim et al made empirical correlations of heat transfer and pressure drop for zigzag PCHE with wide Reynolds numbers and compared them with previous correlations numerically.…”

Section: Introductionmentioning

confidence: 99%

Experimental and numerical study on thermal‐hydraulic performance of printed circuit heat exchanger for liquefied gas vaporization

Zhao

Chen

Zhang

et al. 2019

Energy Science & Engineering

View full text Add to dashboard Cite

The thermal-hydraulic performance of printed circuit heat exchanger (PCHE) through an experimental vaporization process of supercritical nitrogen was investigated. The inlet temperature of supercritical nitrogen was controlled between 113 K and 129 K, while its pressure was controlled between 4.5 MPa and 6 MPa. The mass of supercritical nitrogen corresponds to the turbulent state on the cold side of PCHE, which was maintained at 299.94 kg/h. A numerical processing of the same supercritical nitrogen flow through a single channel of PCHE cold side was presented. The numerical results were validated by comparison with the experimental data. Both experimental and numerical results showed that the increased inlet supercritical nitrogen pressure improved the heat transfer performance and pressure drop decreased with increasing the pressure at the PCHE cold side. Furthermore, the Fanning friction coefficient (f) and the Nusselt number (Nu) of supercritical nitrogen flow obtained by numerical simulation and empirical correlation were compared. K E Y W O R D Snitrogen gasification, printed circuit heat exchanger, supercritical fluid, thermal-hydraulic performance How to cite this article: Zhao Z, Chen X, Zhang X, Ma X, Yang S. Experimental and numerical study on thermal-hydraulic performance of printed circuit heat exchanger for liquefied gas vaporization. Energy Sci Eng. 2020;8:426-440. https ://doi.

show abstract

Thermal performance of heterogeneous PCHE for supercritical CO2 energy cycle

Cited by 88 publications

References 24 publications

Numerical Study on Thermal Hydraulic Performance of Supercritical LNG in Zigzag-Type Channel PCHEs

Numerical Study on Thermal Hydraulic Performance of Supercritical LNG in Zigzag-Type Channel PCHEs

Numerical investigation on thermal performance and flow characteristics of Z and S shape printed circuit heat exchanger using S-CO2

Experimental and numerical study on thermal‐hydraulic performance of printed circuit heat exchanger for liquefied gas vaporization

Contact Info

Product

Resources

About