Article
Mechanics
Jiayong Wang, Dong Li, Leihu Shen, Yuhe Shang
Summary: This study investigated the dynamic behavior of a droplet impacting on an ultrasonic vibrated surface and examined the effects of surface impacting position and impact velocity on the droplet dynamics and removal process. Experimental results showed that the uneven forces induced by the ultrasonic vibration were the main factor determining the droplet behavior, and the ultrasonic vibration also promoted droplet spreading. Additionally, increasing impact velocity led to the transformation of the impact dynamic modes.
Article
Chemistry, Multidisciplinary
Pawel Kustron, Marcin Korzeniowski, Adam Sajbura, Tomasz Piwowarczyk, Pawel Kaczynski, Pawel Sokolowski
Summary: This study explores the use of ultrasonic atomization as a new approach for manufacturing metal and metal alloy powders. Two prototype high-power ultrasonic systems were used to investigate the atomization process. The effectiveness of the systems and the theoretical assumptions were evaluated through preliminary studies on water. The results showed that the ultrasonic wave caused cavitation, leading to the breakup of the liquid into fine droplets.
APPLIED SCIENCES-BASEL
(2023)
Article
Thermodynamics
Dongxu Wu, Qi Cui, Yuanzhi Gao, Zhaofeng Dai, Bo Chen, Changling Wang, Xiaosong Zhang
Summary: Liquid desiccant air conditioning system (LDAS) is a promising air conditioning system due to its low-grade heat utilization, effective humidity control, and environmental friendliness. This study introduces high-efficiency solar interfacial evaporation for liquid desiccant regeneration, which shows competitive regeneration rate and efficiency compared to traditional methods. The research provides a novel method for liquid desiccant regeneration.
Article
Acoustics
Renato Galleguillos
Summary: An experiment was conducted to investigate the absence of acoustic cavitation during free surface ultrasonic atomization. The results showed that acoustic cavitation was not detected during the atomization process.
Article
Construction & Building Technology
Jeong Kuk Hong, Inchan Hwang, Chul Woo Roh, Min Soo Kim
Summary: In this study, ED regeneration experiments were conducted using KCOOH liquid desiccant, and the effects of operating conditions on resistance, transport number, and osmotic coefficient were analyzed. The results showed that KCOOH had the highest transport number under low solution vapor pressure conditions, indicating its potential as an energy-efficient working fluid.
ENERGY AND BUILDINGS
(2022)
Article
Environmental Sciences
Hung Cong Duong, Long Duc Nghiem, Ashley Joy Ansari, Thao Dinh Vu, Khai Manh Nguyen
Summary: This study assessed the regeneration of liquid desiccant LiCl solution by pilot direct contact membrane distillation (DCMD) using computer simulation. The results showed that the pilot DCMD process under counter-current flow is superior to that under cocurrent flow in terms of thermal efficiency and LiCl concentration enrichment. The feed inlet temperature, LiCl concentration, and membrane leaf length were found to have significant impacts on the process performance in the pilot DCMD regeneration of LiCl solution under counter-current flow.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2022)
Article
Materials Science, Ceramics
Sheng Qu, Chao Zhang, Yingdong Liang, Zhelun Ma, Fanwei Meng, Zixuan Wang, Pengfei Xu, Tianbiao Yu, Ji Zhao
Summary: In this study, a non-conventional hybrid polishing system combining ultrasonic atomization spraying method and axial ultrasonic vibration was developed for processing K9 optical glass. The experimental results showed that the best surface quality and micro-morphology were achieved at UA-UVP, providing an experimental basis for applying ultrasonic vibration technology in polishing.
CERAMICS INTERNATIONAL
(2022)
Article
Construction & Building Technology
Xiaohong Yin, Xinli Wang, Xinyu Wei, Hongxia Zhao, Lei Wang, Lei Jia
Summary: The study investigates a vacuum-based liquid desiccant regenerator (VLDR) for desiccant solution regeneration in Liquid Desiccant Air Conditioning (LDAC) system driven by low-grade energy and develops a mathematical model to analyze system performance and energy efficiency. The results show that hot water temperature and flowrate are key variables affecting generator performance, while cooling water temperature and flowrate influence condenser performance.
BUILDING AND ENVIRONMENT
(2021)
Article
Food Science & Technology
Oscar Antonio-Gutierrez, Andrea Selene Lopez-Diaz, Emma Mani-Lopez, Enrique Palou, Aurelio Lopez-Malo, Nelly Ramirez-Corona
Summary: This study evaluated the effectiveness of spraying juices during shortwave ultraviolet irradiation treatments using ultrasonic atomization and pneumatic atomization. Different fruit juices were processed to assess the effect of these treatments, showing that five decimal reduction cycles were achieved after processing in the UVC + UA and UVC + PA arrangements. Losses in ascorbic acid, anthocyanin content, and antioxidant activity were also observed in the juices.
JOURNAL OF FOOD SCIENCE AND TECHNOLOGY-MYSORE
(2022)
Article
Engineering, Chemical
Dongxu Wu, Yuanzhi Gao, Hongshuo Qu, Zhaofeng Dai, Changling Wang, Xiaosong Zhang
Summary: Liquid desiccant air-conditioning (LDAC) system is a promising alternative to the traditional vapor compression system. The most energy-consuming part of LDAC system is desiccant regeneration. An urgent issue that needs to be addressed is the inefficiency of traditional regeneration method. Solar heat localization is a novel and high -efficiency strategy for seawater desalination. However, the wide application is confined due to the low-efficient of water condensation and harvesting. In this work, the regeneration performance of heat localization method was investigated and an electric heating sheet was adopted to circumvent the effect of solar reflection. Compared with traditional heating method, the regeneration performance can be significantly improved by heat localization method. The regeneration efficiency of desiccant with 40 % concentration was significantly improved by 6 times (about 23.15 %) through heat localization method. Heat localization method allows immediate concentration of high-concentration desiccant with a low-temperature rise of regenerated desiccant. The low-temperature rise is beneficial for LDAC system due to less cooling energy is needed. This work is expected to extend the application of solar heat localization and provide some new information for liquid desiccant regeneration.
Article
Materials Science, Ceramics
Sheng Qu, Fanwei Meng, Liaoyuan Chen, Zhelun Ma, Zixuan Wang, Ming Li, Tianbiao Yu, Ji Zhao
Summary: This research introduces an ultrasonic vibration polishing method based on ultrasonic atomization (UA-UVP) to improve the surface finish and processing efficiency of optical components. Through orthogonal experiments and optimization techniques, it is shown that the proposed method enhances the polishing performance of K9 optical glass.
CERAMICS INTERNATIONAL
(2022)
Article
Construction & Building Technology
Tarek El Bobo, Kamel Ghali, Jean Paul Harrouz, Nesreen Ghaddar
Summary: Indoor humidity management is a critical challenge in the built environment. This study presents a novel solution to regulate indoor air humidity levels using a rotating desiccant-coated belt integrated in the building facade. The system creates a gradient by drying the airgap, driving indoor moisture outdoors. The study evaluates the system performance at different operational conditions in different climates.
ENERGY AND BUILDINGS
(2023)
Article
Materials Science, Multidisciplinary
Mohanram Parthiban, Venkatesh Chenrayan, Chandraprabhu Venkatachalam, Kiran Shahapurkar, Addisu Bekele
Summary: The study focused on using desiccants to enhance the drying process of vegetables and fruits, with optimal parameters identified as a 6mm hole diameter, a mass flow rate of 0.003 Kg m(-2)s, and a temperature of 60 degrees Celsius for effective regeneration of solid desiccants.
MATERIALS RESEARCH EXPRESS
(2021)
Article
Construction & Building Technology
Qing Cheng, Han Wang, Yao Chen
Summary: A new solar cascade regeneration system has been developed for liquid desiccant air-conditioning systems in severely hot and humid climates, with lower heating temperature requirements and energy consumption compared to traditional systems. It can conveniently control the required heating temperature to meet variable environmental conditions while achieving a maximum heating temperature drop of 7 degrees C and a 14% energy-saving when applied.
BUILDING AND ENVIRONMENT
(2021)
Review
Acoustics
Haripriya Naidu, Ozan Kahraman, Hao Feng
Summary: Liquid atomization is widely used in various industrial applications, and ultrasonic atomization has gained interest as a green and energy-efficient alternative. This review article focuses on the recent advancements in the separation of organic molecules, especially bioethanol, from aqueous solutions using ultrasonic misting. The experimental setups, mist collection methods, droplet size distribution, and separation mechanism are analyzed and compared. The applications of ultrasonic atomization in pharmaceutical and medical device production are also discussed.
ULTRASONICS SONOCHEMISTRY
(2022)
Article
Nanoscience & Nanotechnology
Fengjing Jiang, Li Dai, Ye Yao
Article
Materials Science, Characterization & Testing
Wei Li, Ye Yao
Article
Thermodynamics
Ye Yao, Jiongde Chen, Jingmei Feng, Shaofan Wang
INTERNATIONAL JOURNAL OF REFRIGERATION-REVUE INTERNATIONALE DU FROID
(2019)
Article
Thermodynamics
Ye Yao, Wei Li, Yixiong Hu
APPLIED THERMAL ENGINEERING
(2020)
Article
Thermodynamics
Wei Li, Ye Yao, Divyanshu Kumar Shekhar
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2019)
Article
Thermodynamics
Wei Li, Ye Yao
Summary: The paper introduces the principle of internally-cooled membrane-based liquid desiccant dehumidifier and various flow patterns affecting its performance, demonstrating that counter flow arrangement between air and solution and parallel flow arrangement between solution and cooling water achieve the best dehumidification efficiency.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2021)
Article
Construction & Building Technology
Lei Xiong, Ye Yao
Summary: A K-nearest neighbors (KNN)-based thermal comfort model is proposed in this paper to establish a personalized adaptive thermal comfort environment according to individual preferences, and it is studied through an AI environmental controller. Experimental results show that the model can achieve an accuracy of 88.31% with 1000 sets of training data, effectively meeting practical demand.
BUILDING AND ENVIRONMENT
(2021)
Review
Construction & Building Technology
Ye Yao, Divyanshu Kumar Shekhar
Summary: Building systems are complex and unpredictable, posing challenges for energy-saving control. Model predictive control (MPC) is a potential strategy to address these challenges. This paper provides a comprehensive view of MPC applications in building HVAC systems, discussing modeling techniques and optimization algorithms in detail.
BUILDING AND ENVIRONMENT
(2021)
Article
Thermodynamics
Wei Li, Ye Yao
Summary: This study developed mathematical models and experimentally validated the performance of ten flow types of IMLDD. The differences in temperature and humidity between air and solution varied among different flow types, and the effects of operating conditions on performance were thoroughly studied. The findings can help researchers and engineers choose the appropriate form of IMLDD based on inlet conditions.
Article
Thermodynamics
W. Li, Y. Yao, J. Chen
JOURNAL OF APPLIED FLUID MECHANICS
(2018)
Article
Thermodynamics
Mahsa Taghavi, Swapnil Sharma, Vemuri Balakotaiah
Summary: This study investigates the natural convection effects in the insulation layers of spherical storage tanks and their impact on the tanks' performance. The permeability and Rayleigh number of the insulation material are considered as key factors. The results show that as the Rayleigh number increases, new convective cells emerge and cause the cold boundary to approach the external hot boundary. In the case of large temperature differences, multiple solutions may coexist.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2024)
Article
Thermodynamics
Jinyang Xu, Fangjun Hong, Chaoyang Zhang
Summary: This study introduces a self-induced jet impingement device for enhancing pool boiling performance in high power electronic cooling. Through visualization and parametric investigations, the effects of this device on pool boiling performance are studied, revealing the promotion of additional liquid supply and vapor exhausting. The flow rate of the liquid jet is found to positively impact boiling performance.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2024)
Article
Thermodynamics
Wenchao Ke, Yuan Liu, Fissha Biruke Teshome, Zhi Zeng
Summary: Underwater wet laser welding (UWLW) is a promising and labor-saving repair technique. A thermal multi-phase flow model was developed to study the heat transfer, fluid dynamics, and phase transitions during UWLW. The results show that UWLW creates a water keyhole, making the welding environment similar to in air laser welding.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2024)
Article
Thermodynamics
Xingrong Lian, Lin Tian, Zengyao Li, Xinpeng Zhao
Summary: This study investigates the heat transfer mechanisms in natural fiber-derived porous structures and finds that thermal radiation has a significant impact on the thermal conductivity in low-density regions, while natural convection rarely occurs. Insulation materials derived from micron-sized natural fibers can achieve minimum thermal conductivity at specific densities. Strategies to lower the thermal conductivity include increasing porosity and incorporating nanoscale pores using nanosize fibers.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2024)
Article
Thermodynamics
Yasir A. Malik, Kilian Koebschall, Stephan Bansmer, Cameron Tropea, Jeanette Hussong, Philippe Villedieu
Summary: Ice crystal icing is a significant hazard in aviation, and accurate modeling of sticking efficiency is essential. In this study, icing wind tunnel experiments were conducted to quantify the volumetric liquid water fraction, sticking efficiency, and maximum thickness of ice layers. Two measurement techniques, calorimetry and capacitive measurements, were used to measure the liquid water content and distribution in the ice layers. The experiments showed that increasing wet bulb temperatures and substrate heat flux significantly increased sticking efficiency and maximum ice layer thickness.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2024)
Article
Thermodynamics
Jinqi Hu, Tongtong Geng, Kun Wang, Yuanhong Fan, Chunhua Min, Hsien Chin Su
Summary: This study experimentally examined the heat dissipation of vibrating fans and demonstrated its inherent mechanism through numerical simulation. The results showed that the flow fields induced by the vibrating blades exhibited pulsating features and formed large-scale and small-scale vortical structures, significantly improving heat dissipation. The study also identified the impacts of different blade structures and developed a trapezoidal-folding blade, which effectively reduced the maximum temperature of the heat source and alleviated high-temperature failure crisis.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2024)
Article
Thermodynamics
Dan-Dan Su, Xiao-Bin Li, Hong-Na Zhang, Feng-Chen Li
Summary: The boiling heat transfer of low-boiling-point working fluid is a common heat dissipation technology in electronic equipment cooling. This study analyzed the interfacial boiling behavior of R134a under different conditions and found that factors such as the initial thickness of the liquid film, solid-liquid interaction force, and initial temperature significantly affect the boiling mode and thermal resistance.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2024)
Article
Thermodynamics
Jinyi Wu, Dongke Sun, Wei Chen, Zhenhua Chai
Summary: A unified lattice Boltzmann-phase field scheme is proposed to simulate dendrite growth of binary alloys in the presence of melt convection. The effects of various factors on the growth are investigated numerically, and the model is validated through comparisons and examinations.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2024)
Article
Thermodynamics
Shaokun Ge, Ya Ni, Fubao Zhou, Wangzhaonan Shen, Jia Li, Fengqi Guo, Bobo Shi
Summary: This study investigated the temperature distribution of main cables in a suspension bridge during fire scenarios and proposed a prediction model for the maximum temperature of cables in different lane fires. The results showed that vehicle fires in the emergency lane posed a greater thermal threat to the cables.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2024)
Article
Thermodynamics
Shuang-Ying Wu, Shi-Yao Zhou, Lan Xiao, Jia Luo
Summary: This paper investigates the two-phase flow and heat transfer characteristics of low-velocity jet impacting on a cylindrical surface. The study reveals that the heat transfer regimes are non-phase transition and nucleate boiling with the increase of heat transfer rate. The effects of jet impact height and outlet velocity on local surface temperatures are pronounced at the non-phase transition stage. The growth rates of heat transfer rate and liquid loss rate increase significantly from the non-phase transition to nucleate boiling stage.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2024)
Article
Thermodynamics
Emad Hasani Malekshah, Wlodzimierz Wlodzimierz, Miros law Majkut
Summary: Cavitation has significant practical importance and can be controlled by air injection. This study investigates the natural to ventilated cavitation process around a hydrofoil through numerical and experimental methods. The results show that the location and rate of air injection have a meaningful impact on the characteristics of cavitation.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2024)
Article
Thermodynamics
Feriel Yahiat, Pascale Bouvier, Antoine Beauvillier, Serge Russeil, Christophe Andre, Daniel Bougeard
Summary: This study explores the enhancement of mixing performance in laminar flow equipment by investigating the generation of chaotic advection using wall deformations in annular geometries. The findings demonstrate that the combined geometry can achieve perfect mixing at various Reynolds numbers.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2024)
Article
Thermodynamics
Hui He, Ning Lyu, Caihua Liang, Feng Wang, Xiaosong Zhang
Summary: This study investigates the condensation, frosting, and defrosting processes on superhydrophobic surfaces with millimeter-scale structures. The results reveal that the structures can influence the growth and removal of frost crystals, with the bottom grooves creating a frost-free zone and conical edges promoting higher frost crystal heights. Two effective methods for defrosting are observed: hand-lifting the groove and airfoil retraction contraction on protruding structures. This research provides valuable insights into frost formation and defrosting on millimeter-structured superhydrophobic surfaces, with potential applications in anti-frost engineering.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2024)
Article
Thermodynamics
Thiwanka Arepolage, Christophe Verdy, Thibaut Sylvestre, Aymeric Leray, Sebastien Euphrasie
Summary: This study developed two thermal concentrators, one with a 2D design of uniform thickness and another with a 3D design, using the coordinate transformation technique and metamaterials. By structuring the thermal conductor, the desired local density-heat capacity product and anisotropic thermal conductivities were achieved. The homogenized thermal conductivities were obtained from finite element simulations and cylindrical symmetry consideration. A 3D concentrator was fabricated using 3D metal printing and characterized using a thermal camera. Compared to devices that solely consider anisotropic conductivities, the time evolution characteristics of the metadevice designed with coordinate transformation were closer to those of an ideal concentrator.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2024)
Article
Thermodynamics
Liangyuan Cheng, Qingyang Wang, Jinliang Xu
Summary: In this study, we investigated the supercritical heat transfer of CO2 in a horizontal tube with a diameter of 10.0 mm, covering a wide range of pressures, mass fluxes, and heat fluxes. The study revealed a non-monotonic increase in wall temperatures along the flow direction and observed both positive and negative wall temperature differences between the bottom and top tube. The findings were explained by the thermal conduction in the solid wall interacting with the stratified-wavy flow in the tube.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2024)
