Numerical Study on Thermal Hydraulic Performance of Supercritical LNG in Zigzag-Type Channel PCHEs
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)...
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| Format: | Article |
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MDPI AG
2019-02-01
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| Series: | Energies |
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| Online Access: | https://www.mdpi.com/1996-1073/12/3/548 |
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| author | Zhongchao Zhao Yimeng Zhou Xiaolong Ma Xudong Chen Shilin Li Shan Yang |
| author_facet | Zhongchao Zhao Yimeng Zhou Xiaolong Ma Xudong Chen Shilin Li Shan Yang |
| author_sort | Zhongchao Zhao |
| collection | DOAJ |
| description | 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 <i>κ</i>-<i>ω</i> 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/(m<sup>2</sup>·s) to 621.6 kg/(m<sup>2</sup>·s), which improves at bend angle of 10° and lower compared to 15° at mass flux above 414.4 kg/(m<sup>2</sup>·s). The heat transfer performance is better at larger mass flux and lower operating pressures. |
| first_indexed | 2024-04-11T22:02:37Z |
| format | Article |
| id | doaj.art-d6a4e3e5aac84e5589a2edd71a57f583 |
| institution | Directory Open Access Journal |
| issn | 1996-1073 |
| language | English |
| last_indexed | 2024-04-11T22:02:37Z |
| publishDate | 2019-02-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Energies |
| spelling | doaj.art-d6a4e3e5aac84e5589a2edd71a57f5832022-12-22T04:00:51ZengMDPI AGEnergies1996-10732019-02-0112354810.3390/en12030548en12030548Numerical Study on Thermal Hydraulic Performance of Supercritical LNG in Zigzag-Type Channel PCHEsZhongchao Zhao0Yimeng Zhou1Xiaolong Ma2Xudong Chen3Shilin Li4Shan Yang5School of Energy and Power, Jiangsu University of Science and Technology, Zhenjiang 212000, ChinaSchool of Energy and Power, Jiangsu University of Science and Technology, Zhenjiang 212000, ChinaSchool of Energy and Power, Jiangsu University of Science and Technology, Zhenjiang 212000, ChinaSchool of Energy and Power, Jiangsu University of Science and Technology, Zhenjiang 212000, ChinaSchool of Energy and Power, Jiangsu University of Science and Technology, Zhenjiang 212000, ChinaSchool of Energy and Power, Jiangsu University of Science and Technology, Zhenjiang 212000, ChinaIn 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 <i>κ</i>-<i>ω</i> 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/(m<sup>2</sup>·s) to 621.6 kg/(m<sup>2</sup>·s), which improves at bend angle of 10° and lower compared to 15° at mass flux above 414.4 kg/(m<sup>2</sup>·s). The heat transfer performance is better at larger mass flux and lower operating pressures.https://www.mdpi.com/1996-1073/12/3/548printed circuit heat exchangersupercritical LNGzigzag typeheat transfer performance |
| spellingShingle | Zhongchao Zhao Yimeng Zhou Xiaolong Ma Xudong Chen Shilin Li Shan Yang Numerical Study on Thermal Hydraulic Performance of Supercritical LNG in Zigzag-Type Channel PCHEs Energies printed circuit heat exchanger supercritical LNG zigzag type heat transfer performance |
| title | Numerical Study on Thermal Hydraulic Performance of Supercritical LNG in Zigzag-Type Channel PCHEs |
| title_full | Numerical Study on Thermal Hydraulic Performance of Supercritical LNG in Zigzag-Type Channel PCHEs |
| title_fullStr | Numerical Study on Thermal Hydraulic Performance of Supercritical LNG in Zigzag-Type Channel PCHEs |
| title_full_unstemmed | Numerical Study on Thermal Hydraulic Performance of Supercritical LNG in Zigzag-Type Channel PCHEs |
| title_short | Numerical Study on Thermal Hydraulic Performance of Supercritical LNG in Zigzag-Type Channel PCHEs |
| title_sort | numerical study on thermal hydraulic performance of supercritical lng in zigzag type channel pches |
| topic | printed circuit heat exchanger supercritical LNG zigzag type heat transfer performance |
| url | https://www.mdpi.com/1996-1073/12/3/548 |
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