Quality study on different parts of Panax notoginseng root drying with a hybrid drying system powered by a solar photovoltaic/thermal air collector and wind turbine

Kong, Decheng; Wang, Yunfeng; Li, Ming; Liang, Jingkang; Liu, Xianglong; Yin, Gaofei

doi:10.1016/j.energy.2022.123216

Cited by 13 publications

(2 citation statements)

References 31 publications

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“…Especially in the wind-hydro complementary generation system (WHCGS), the distributed characteristics of the wind turbine, as well as the uncontrollable and random fluctuations of the wind speed produce unqualified frequencies and voltages. [2,3] With the increase of wind power grid-connected capacity, large power fluctuations cause the system frequency to deviate significantly from the rated frequency. [4] In addition, to satisfy the effective integration of various renewable energy sources into the grid, hydropower generation is gradually replacing the coal-based flexible power sources that suppress wind and solar volatility due to its high efficiency, rapid response, and low cost, and undertakes frequent compensation and regulation tasks.…”

Section: Introductionmentioning

confidence: 99%

System Power Quality Analysis under Wind–Hydro Complementary Generation Mode

Gao,

Liu,

Sun

et al. 2024

Energy Tech

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The highly random and characteristics of wind power generation challenge the power quality of the wind–hydro complementary generation system (WHCGS). Herein, the transient characteristics of power quality under the complementary generating mode are studied. First, a nonlinear hydropower system (HPS) model is innovatively established considering the dynamic characteristics of hydrounits under part load operation, and then a wind power system model including wind speed model, wind turbine and its controller, generator and converter is established. Finally, the applicability of WHCGS model in power quality evaluation is established and verified by IEEE‐9 node model. Combined with active power, frequency, and voltage power quality indicators, the effects of wind–hydro capacity ratio and voltage sag on the system are quantified. The results show that the increase in wind power penetration will deteriorate the power quality of WHCGS. Moreover, when the wind power capacity reaches 60 MW, it will damage the voltage and frequency stability of HPS. Besides, the larger the voltage sag amplitude, the worse the power quality of WHCGS. The longer the voltage sag lasts, the higher the risk of WHCGS instability. This article provides a technical reference for the safe and stable operation of WHCGS.

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Section: Introductionmentioning

confidence: 99%

System Power Quality Analysis under Wind–Hydro Complementary Generation Mode

Gao,

Liu,

Sun

et al. 2024

Energy Tech

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“…Jiang et al (2020) used a pulsed vacuum to dry Panax notoginseng root and compared it with hot air in terms of color parameters, ginsenoside content, and Panax notoginseng saponins, finally found that pulsed vacuum drying had a better effect. Kong et al (2022) used a hybrid drying system powered by a solar photovoltaic/thermal air collector and wind turbine to dry Panax notoginseng and compared it with natural drying in terms of drying kinetics, color parameters, microstructure, thermal stability, and ginsenoside content, finally found that this drying system was fit for drying Panax notoginseng. However, there is no report of using a moisture content prediction model for moisture monitoring of Panax notoginseng in the drying process.…”

Section: Introductionmentioning

confidence: 99%

Study on drying characteristics and moisture content prediction model of Panax notoginseng taproot by using segmented drying of microwave vacuum combined with hot air

Zhang

Shi

Xin

et al. 2022

J Food Process Engineering

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In order to explore the drying characteristics of Panax notoginseng taproot (PNT) and realize the dynamic monitoring of moisture content in the segmented drying process of microwave vacuum combined with hot air, the PNT was conducted the experimental study under different convert moisture contents of wet basis (20, 30, 40 g•g À1 ), upper-temperature limits (45, 50, 55 C), power densities (0.50, 0.75, 1.00, 1.50 W•g À1 ) and chamber pressures (1, 3, 5, 10 kPa). The dynamic changes in moisture ratio and drying rate under different drying conditions were studied, and a snake optimizer-support vector regression (SO-SVR) model was proposed to predict mois-

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A rectangular-wave-honeycomb composite adsorbent with sorption thermal energy storage for continuous solar drying of mushroom

Li,

Yu,

et al. 2024

Energy Conversion and Management

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Quality study on different parts of Panax notoginseng root drying with a hybrid drying system powered by a solar photovoltaic/thermal air collector and wind turbine

Cited by 13 publications

References 31 publications

System Power Quality Analysis under Wind–Hydro Complementary Generation Mode

System Power Quality Analysis under Wind–Hydro Complementary Generation Mode

Study on drying characteristics and moisture content prediction model of Panax notoginseng taproot by using segmented drying of microwave vacuum combined with hot air

A rectangular-wave-honeycomb composite adsorbent with sorption thermal energy storage for continuous solar drying of mushroom

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