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504 results on '"Wu, Xuehong"'

47. Drying kinetics of Pleurotus eryngii slices during hot air drying

Author

Liu He, Jiao Junhua, Tian You, Liu Jia’ao, Yuan Pei, and Wu Xuehong

Subjects
pleurotus eryngii, hot air drying, heat transfer, moisture transfer, Physics, QC1-999
Abstract

Hot air drying is widely adopted to extend the shelf life of Pleurotus eryngii, which is an edible fungus with high nutritional value and large market demand. Understanding moisture transfer during hot air drying is essential for both quality improvement and energy-efficient dryer design. In this study, we investigated the drying kinetics of P. eryngii slices with different thicknesses (4, 8, and 12 mm) under different hot air temperature levels (40, 50, 60, 70, and 80°C) and a constant air velocity (2 m/s). It is found that the drying rate increases with the increase of the hot air temperature or the decrease of the thickness of P. eryngii slices. Only a falling rate period was observed during the hot air drying. We used eight mathematical models to describe the drying kinetics of P. eryngii slices and found that the logarithmic model fits the experimental data best. The fitted effective moisture diffusivity of P. eryngii slices is in the range of 3.34×10−93.34\times {10}^{-9} to 2.25×10−9 m2/s2.25\times {10}^{-9}{\text{ m}}^{2}/\text{s}, and the fitted drying activation energy is 19.30 kJ/mol, agreeing with the results in the literature. Additionally, we noticed that the color of dried P. eryngii slices becomes darker with the increase of hot air temperature due to the Maillard browning reaction. This study helps to understand the drying kinetics of P. eryngii slices during the hot air drying and guides the drying process optimization.

Published
2022
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48. Micro/nano encapsulated phase change material: materials, preparation, and emerging advances in the solar energy field.

Author

Zhang, Qi, Li, Yanfang, Liu, Chongyang, Wu, Xuehong, Zhang, Xueling, Song, Jun, Mao, Yiqiu, and Yuan, Kunjie

Abstract

Phase change materials (PCMs) possess high latent heat during the solid–liquid phase transition, making them promising materials for thermal energy storage. However, challenges such as corrosion, leakage, subcooling, and phase separation significantly hinder their application. To address these issues, the preparation of phase change micro–nanocapsules has been explored. Phase change micro–nanoencapsulation technology mitigates the problem of unmatched heat supply and demand. It has been extensively researched in solar thermal utilization systems. In recent years, significant progress has been made in the types of PCMs, methods for preparing phase change micro–nanocapsules, and their applications in solar thermal systems. This paper introduces the material selection for phase change micro–nanocapsules, their preparation methods, and the photothermal conversion performance. A comprehensive review of the recent research progress in micro–nanocapsule technology within solar energy systems is provided, explores the current research status, and discusses future research trends. [ABSTRACT FROM AUTHOR]

Published
2024
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49. An Analysis of the Influence of DSC Parameters on the Measurement of the Thermal Properties of Phase-Change Material.

Author

Gao, Maotiao, Zhao, Shiqi, Yang, Hongjun, Wu, Xuehong, and Xiao, Yingjie

Abstract

A differential scanning calorimeter (DSC) is widely used for measuring the thermal properties of phase-change materials (PCMs). Optimizing test conditions based on material characteristics is essential for accurate results. This study investigates the effects of experimental parameters, including sample mass, heating rate, measurement modes, and atmosphere flow rate, on the phase-change enthalpy and phase-change temperature results. The findings indicate that variations in sample mass and heating rate lead to significant changes in phase-change temperatures, while an increase in purge gas flow rate reduces the phase-change enthalpy of the PCM. Based on the measurements, this study optimizes the DSC parameters and provides a reference for the accurate measurement of paraffin-based phase-change materials. [ABSTRACT FROM AUTHOR]

Published
2024
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