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Experimental study of critical flow of water at supercritical pressure

Yuzhou CHEN, Chunsheng YANG, Shuming ZHANG, Minfu ZHAO, Kaiwen DU, Xu CHENG

Frontiers in Energy 2009, Volume 3, Issue 2,   Pages 175-180 doi: 10.1007/s11708-009-0029-6

Abstract: Experimental studies of the critical flow of water were conducted under steady-state conditions withThe parametric trend of the flow rate was investigated, and the experimental data were compared withIt is concluded that in the near or beyond pseudo-critical region, thermal-dynamic equilibrium is dominant

Keywords： critical flow     supercritical water-cooled reactor(SCWR)     reactor safety     loss of coolant accident(LOCA)    

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Critical flow-storm approach to total maximum daily load (TMDL) development: an analytical conceptual

Zhang Harry, Yu Shaw

Frontiers of Environmental Science & Engineering 2008, Volume 2, Issue 3,   Pages 267-273 doi: 10.1007/s11783-008-0058-0

Abstract: the key challenges in the total maximum daily load (TMDL) development process is how to define the criticalmain concern in using a continuous simulation approach is the absence of any guarantee that the most criticalThe objectives of this paper are to clearly address the critical condition in the TMDL development processA practical, event-based critical flow-storm (CFS) approach was developed to explicitly addresses thecritical condition as a combination of a low stream flow and a storm event of a selected magnitude,

Keywords： representative hydrologic     occurrence     simulation approach     scarcity     alternative    

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Simulation of cross-flow-induced vibration of tube bundle by surface vorticity method

WANG Fenghao, JIANG Gedong, Lin John Zhang

Frontiers in Energy 2008, Volume 2, Issue 3,   Pages 243-248 doi: 10.1007/s11708-008-0049-7

Abstract: A fluid-structure interaction model based on Surface Vorticity Method (SVM) was used to study flow-inducedThe flow-induced vibrations of four tubes in a rotated square and a staggered tube bundle in three-rowand five-column arrangements were simulated in the high sub-critical Reynolds number () range.The results also showed that when more flexible tubes are used, the flow pattern changed drasticallyand the fluid-structure interaction imposed a dominant impact on the flow.

Keywords： dominant     sub-critical Reynolds     staggered     Vorticity     three-row    

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Convective mass transfer from a horizontal rotating cylinder in a slot air jet flow

Hongting MA , Dandan MA , Na YANG ,

Frontiers in Energy 2009, Volume 3, Issue 3,   Pages 289-296 doi: 10.1007/s11708-009-0019-8

Abstract: The effects of air jet impinging on the mass transfer characteristics from a rotating spinning cylinder surface were experimentally investigated. The effects of rotational Reynolds number

Keywords： air jet impinging     rotating cylinder     critical point     mass transfer characteristics    

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The development of aerodynamics & configurationtechnology for large aircraft

Zhang Yanzhong

Strategic Study of CAE 2009, Volume 11, Issue 5,   Pages 4-17

Abstract:

The paper introduced the development of aerodynamics & configuration technology for large aircraft.The technique of fuselage and the advanced aerodynamics configuration — blended wing body (BWB) were described. The impact of aerodynamics & configuration technology on safety, economical, comfortable and environmental characters for large aircraft was analyzed.The proposal for enhancing the research of aerodynamics in China was presented.

Keywords： large aircraft     aerodynamics     super critical foil     winglet     laminar flow technique     BWB     CFD     wind tunnel    

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Microbial biodegradation of plastics: Challenges, opportunities, and a critical perspective

Frontiers of Environmental Science & Engineering 2022, Volume 16, Issue 12, doi: 10.1007/s11783-022-1596-6

Abstract:

● Health hazards of plastic waste on environment are discussed.

Keywords： Plastic-waste     Polymers     Health-hazards     Biodegradation     Microorganisms     Enzymes    

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Machine learning in building energy management: A critical review and future directions

Frontiers of Engineering Management 2022, Volume 9, Issue 2,   Pages 239-256 doi: 10.1007/s42524-021-0181-1

Abstract: Over the past two decades, machine learning (ML) has elicited increasing attention in building energy management (BEM) research. However, the boundary of the ML-BEM research has not been clearly defined, and no thorough review of ML applications in BEM during the whole building life-cycle has been published. This study aims to address this gap by reviewing the ML-BEM papers to ascertain the status of this research area and identify future research directions. An integrated framework of ML-BEM, composed of four layers and a series of driving factors, is proposed. Then, based on the hype cycle model, this paper analyzes the current development status of ML-BEM and tries to predict its future development trend. Finally, five research directions are discussed: (1) the behavioral impact on BEM, (2) the integration management of renewable energy, (3) security concerns of ML-BEM, (4) extension to other building life-cycle phases, and (5) the focus on fault detection and diagnosis. The findings of this study are believed to provide useful references for future research on ML-BEM.

Keywords： building energy management     machine learning     integrated framework     knowledge evolution    

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Reducing environmental impacts through socioeconomic transitions: critical review and prospects

Frontiers of Environmental Science & Engineering 2023, Volume 17, Issue 2, doi: 10.1007/s11783-023-1624-1

Abstract:

● Reducing environmental impacts through socioeconomic structural transitions.

Keywords： Environmental pressures     Environmental impacts     Nexus     Supply chains     Trade     Coupled systems    

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Advances in airborne microorganisms detection using biosensors: A critical review

Frontiers of Environmental Science & Engineering 2021, Volume 15, Issue 3, doi: 10.1007/s11783-021-1420-8

Abstract:

Humanity has been facing the threat of a variety of infectious diseases. Airborne microorganisms can cause airborne infectious diseases, which spread rapidly and extensively, causing huge losses to human society on a global scale. In recent years, the detection technology for airborne microorganisms has developed rapidly; it can be roughly divided into biochemical, immune, and molecular technologies.

Keywords： Biosensor     Airborne microorganisms     Microbiological detection technology    

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Effects of critical geometric parameters on the optical performance of a conical cavity receiver

Hu XIAO, Yanping ZHANG, Cong YOU, Chongzhe ZOU, Quentin FALCOZ

Frontiers in Energy 2019, Volume 13, Issue 4,   Pages 673-683 doi: 10.1007/s11708-019-0630-2

Abstract: performance of receivers with different geometric shapes, but less research is conducted on the effects of critical

Keywords： parabolic collector     conical cavity receiver     critical geometric parameters     optical performance    

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Study of Fire Smoke Flow Characteristics of Horizontal Tunnel Using Longitudinal Ventilation

Lu Ping,Cong Beihua,Liao Guangxuan,Fan Weicheng,Li Peide

Strategic Study of CAE 2004, Volume 6, Issue 10,   Pages 59-64

Abstract: In this paper, on the basis of theoretical analysis of the main factors affecting fire smoke flow inFurther, a mathematical model was established to express the relationships between the critical environments, critical velocities, air speeds, smoke speeds and fire intensities.

Keywords： subway tunnel     fire smoke     buoyant effect     thermal resistance effect     critical velocity    

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MHD effect on the critical temperature differences of oscillatory thermocapillary convection in two-layer

Hulin HUANG, Xiaoming ZHOU,

Frontiers in Energy 2010, Volume 4, Issue 2,   Pages 155-160 doi: 10.1007/s11708-009-0063-4

Abstract: The effect of different directional magnetic fields on critical temperature differences of oscillatorythe , and directions can delay the transition from steady convection to oscillatory convection, and critical

Keywords： magnetohydrodynamic     magnetic fields     thermocapillary convection     critical temperature difference     oscillatory    

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Adsorption behavior of antibiotic in soil environment: a critical review

Shiliang WANG,Hui WANG

Frontiers of Environmental Science & Engineering 2015, Volume 9, Issue 4,   Pages 565-574 doi: 10.1007/s11783-015-0801-2

Abstract: Antibiotics are used widely in human and veterinary medicine, and are ubiquitous in environment matrices worldwide. Due to their consumption, excretion, and persistence, antibiotics are disseminated mostly via direct and indirect emissions such as excrements, sewage irrigation, and sludge compost and enter the soil and impact negatively the natural ecosystem of soil. Most antibiotics are amphiphilic or amphoteric and ionize. A non-polar core combined with polar functional moieties makes up numerous antibiotic molecules. Because of various molecule structures, physicochemical properties vary widely among antibiotic compounds. Sorption is an important process for the environment behaviors and fate of antibiotics in soil environment. The adsorption process has decisive role for the environmental behaviors and the ultimate fates of antibiotics in soil. Multiply physicochemical properties of antibiotics induce the large variations of their adsorption behaviors. In addition, factors of soil environment such as the pH, ionic strength, metal ions, and organic matter content also strongly impact the adsorption processes of antibiotics. Review about adsorption of antibiotics on soil can provide a fresh insight into understanding the antibiotic-soil interactions. Therefore, literatures about the adsorption mechanisms of antibiotics in soil environment and the effects of environment factors on adsorption behaviors of antibiotics in soil are reviewed and discussed systematically in this review.

Keywords： adsorption     antibiotics     environment factors     soil    

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Numerical study of internal flow field and flow passage improvement of an inlet particle separator

Florian PAOLI, Tong WANG

Frontiers in Energy 2011, Volume 5, Issue 4,   Pages 386-397 doi: 10.1007/s11708-011-0156-8

Abstract: By performing gas flow field numerical simulations for several inlet Reynolds numbers (from 2 × 10No particle has been included in the gas flow for a -epsilon turbulence model.All investigations suggest that the separation area is the most critical one for fulfilling the objectiveThen the flow passage improvement method has focused on the separation area.in this study has succeeded in designing a shape which enhances the flow behavior.

Keywords： streamlines     pressure losses     flow passage improvement     inlet particle separator (IPS)    

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Adsorption in combination with ozonation for the treatment of textile waste water: a critical review

Shraddha Khamparia,Dipika Kaur Jaspal

Frontiers of Environmental Science & Engineering 2017, Volume 11, Issue 1, doi: 10.1007/s11783-017-0899-5

Abstract: A combination of adsorption with ozonation proved best for dye removal. Toxicity of the textile effluents can be remarkably reduced by combined method. Wide scope for choice of natural materials for treatment of textile dyes. Intrusion of synthetic textile dyes in the ecosystem has been recognized as a serious issue worldwide. The effluents generated from textiles contain large amount of recalcitrant unfixed dyes which are regarded as emerging contaminants in the field of waste water study. Removal of various toxic dyes often includes diverse and complex set of physico-chemical, biological and advanced oxidation processes adopted for treatment. Adsorption in itself is a well-known technique utilized for treatment of textile effluents using a variety of adsorbents. In addition, ozonation deals with effective removal of dyes using high oxidising power of ozone. The review summarizes dye removal study by a combination of ozonation and adsorption methods. Also, to acquire an effective interpretation of this combined approach of treating wastewater, a thorough study has been made which is deliberated here. Results asserts that, with the combined ability of ozone and a catalyst/adsorbent, there is high possibility of total elimination of dyes from waste water. Several synthetically prepared materials have been used along with few natural materials during the combined treatment. However, considering practical applicability, some areas were identified during the study where work needs to be done for effective implementation of the combined treatment.

Keywords： Adsorption     Ozonation     Catalytic Ozonation     Textile dyes     Mineralization    

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Title Author Date Type Operation

Experimental study of critical flow of water at supercritical pressure

Yuzhou CHEN, Chunsheng YANG, Shuming ZHANG, Minfu ZHAO, Kaiwen DU, Xu CHENG

Journal Article

Critical flow-storm approach to total maximum daily load (TMDL) development: an analytical conceptual

Zhang Harry, Yu Shaw

Journal Article

Simulation of cross-flow-induced vibration of tube bundle by surface vorticity method

WANG Fenghao, JIANG Gedong, Lin John Zhang

Journal Article

Convective mass transfer from a horizontal rotating cylinder in a slot air jet flow

Hongting MA , Dandan MA , Na YANG ,

Journal Article

The development of aerodynamics & configurationtechnology for large aircraft

Zhang Yanzhong

Journal Article

Microbial biodegradation of plastics: Challenges, opportunities, and a critical perspective

Journal Article

Machine learning in building energy management: A critical review and future directions

Journal Article

Reducing environmental impacts through socioeconomic transitions: critical review and prospects

Journal Article

Advances in airborne microorganisms detection using biosensors: A critical review

Journal Article

Effects of critical geometric parameters on the optical performance of a conical cavity receiver

Hu XIAO, Yanping ZHANG, Cong YOU, Chongzhe ZOU, Quentin FALCOZ

Journal Article

Study of Fire Smoke Flow Characteristics of Horizontal Tunnel Using Longitudinal Ventilation

Lu Ping,Cong Beihua,Liao Guangxuan,Fan Weicheng,Li Peide

Journal Article

MHD effect on the critical temperature differences of oscillatory thermocapillary convection in two-layer

Hulin HUANG, Xiaoming ZHOU,

Journal Article

Adsorption behavior of antibiotic in soil environment: a critical review

Shiliang WANG,Hui WANG

Journal Article

Numerical study of internal flow field and flow passage improvement of an inlet particle separator

Florian PAOLI, Tong WANG

Journal Article

Adsorption in combination with ozonation for the treatment of textile waste water: a critical review

Shraddha Khamparia,Dipika Kaur Jaspal

Journal Article