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Air/CO2 cooling garment: Description and benefits of use for subjects exposed to a hot and humid climate during physical activities

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International Journal of Mining Science and Technology 2019年第6期29卷 899-903页

作者： Chady Al Sayed Ludwig Vinches Olivier Dupuy Wafa Douzi Benoit Dugue Stephane Halle Department of Mechanical Engineering ecole de Technologie SuperieureMontreal H3C 1K3Canada Laboratory MOVE Faculty of Sports SciencesUniversity of PoitiersPoitiers 86073France

The severity of the hot and humid conditions to which miners are exposed increases as the depth of the work site *** can cause heat stress that can greatly affect the health and safety of *** resolve this,a cooling garment has been developed that uses an atmospheric discharge of liquid CO2 to create a cool microclimate with an average temperature of 12.5(±0.4)℃ beneath the *** evaluate the garment's cooling efficiency,19 male subjects participated in an experimental *** two modes,cooling on and off,were *** physiological differences were found between the two modes after minute 27(phumidity *** of exertion were lower in the ON-mode condition from minute *** findings provide strong evidence of the ability of this cooling garment to reduce heat stress in hot and humid conditions similar to those encountered in deep mines.

关键词： Cooling garment Deep mining Hot and humid Liquid CO2 expansion Physiological measurements Perceptual responses

Failure Behaviors and Mechanisms of High-Ohmic Resistors Protected by PF/EP Paint in Heat and humid Environment

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Transactions of Tianjin University 2016年第5期22卷 388-395页

作者： Wang Xiuyu Cheng Qiang Ma Xiaopin Zhang Hao Li Mingxiu Chen Tongning Zhang Ping Li Zhixun School of Electronic Information Engineering Tianjin University Tianjin Tricyclic Resistor Co. Ltd

Phenolic formaldehyde(PF)and epoxy(EP)resins are commonly used in electronic packaging. In this paper, high-ohmic resistors(2.2 M?, ±0.5%,)with Cr-Si film were coated by PF/EP paint, and the resulting coated resistors were used for heat and humid(HH)experiments. The experimental results show that the corrosion of bandlike resistive films is selective and isotropic, and that the corrosion spots in resistive films all form along grooves and extend in the same direction. It is revealed that OH^- ions are generated due to the electrochemical reactions of resistive film in HH experiments, so a NaOH aqueous solution with pH about 10 was used to study the effects of absorbed water and OH^- ions on PF/EP polymer film. The results indicates that the color of some part on PF/EP polymer film changes due to corrosion, and that the corrosion part of the polymer film is easy to be peeled off. It can be inferred that OH^- ions generated in HH experiments may play a catalytic role in the chemical reactions between polymer film and the absorbed water, which accelerates the degradation of PF/EP protection film for a resistor.

关键词： Cr-Si film protection film humid environment polymer degradation resistor failure

Effect of building interface form on thermal Check foi comfort in gymnasiums in hot and humid climates

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Frontiers of Architectural Research 2019年第1期8卷 32-43页

作者： Xiaodan Huang Xiaoli Ma Qingyuan Zhang Institute of Urban Innovation Yokohama National University 240-8501 Japan School of Engineering and Computer Science University of Hull HU6 7RX UK

The thermal environment and thermal comfort of a building are greatly affected by the desig n of the build ing interface form. Most con temporary architectural designs con sider only the relations between architectural form and architectural beauty. Few studies on the correlati on of architectural form and thermal comfort address the in flue nee of architectural form on thermal comfort and thermal environment. These studies are particularly important for gymnasium architectures located in hot and humid areas, which have high requirements for thermal comfort. This paper presents an experimental investigati on and an an alysis of the effect of the building in terface form of gymnasiums on thermal comfort in hot and humid subtropical regions during summer. Results showed that the influence of the top interface forms on thermal comfort is mainly dominated by the mea n radiant temperature, which could be con trolled to improve thermal comfort. The in fluence of side interface forms on thermal comfort is mainly domi nated by air velocity, and thermal comfort could be improved by promoting natural ventilation on the side interface form design to reduce indoor heat. This research enhanced our understanding of the relation between the in terface form and the thermal comfort of gymnasiums. In addition, this paper provides a theoretical reference for the sustainable design of gymnasiums in hot and humid climates.

关键词： Thermal comfort Thermal environment Interface form Standard effective temperature Gymnasium Hot and humid climate

humid Air Plasma Treatment of Birnessite Surface: Application to the Removal of Cochineal Red

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Materials Sciences and Applications 2015年第11期6卷 1014-1021页

作者： Wafa Chouchene Nizar Bellakhal UR de Catalyse Electrochimie de Nanomat&eacute riaux et Leurs Applications et de Didactique Institut National des Sciences Appliqu&eacute es et de Technologie (INSAT) Tunis Tunisie

The thin layers of birnessite (Mn7O13?5H2O) are exposed to reactive species gliding arc plasma in humid air, which induces the treatment of the thin layers surface. Plasma treatment thin layer of birnessite was used for the degradation of Cochineal Red. The experimental results showed that 95% of the CR solution was completely decolorized by thin layer of birnessite treated by plasma compared to 80% of the same solution after interaction of thin layer of birnessite untreated. The decay kinetics always follows a pseudo-first order reaction. The application of the humid air plasma for the surface treatment of thin layers of birnessite improves the efficiency of treatment for Cochineal Red degradation.

关键词： humid Air Plasma Surface Treatment Thin Layers of Birnessite Cochineal Red Degradation

Analyses of hot and humid weather in Beijing city in summer and its dynamical identification

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Science China Earth Sciences 2005年第z2期48卷 128-137页

作者： GAO Shouting ZHOU Yushu LEI Ting SUN Jianhua Institute of Atmospheric Physics Chinese Academy of Sciences Beijing 100029 China Institute of Atmospheric Physics Chinese Academy of Sciences Beijing 100029 China Institute of Atmospheric Physics Chinese Academy of Sciences Beijing 100029 China Institute of Atmospheric Physics Chinese Academy of Sciences Beijing 100029 China

The circulation, hygrothermal property and moisture transport character of typical hot and humid weather were analyzed in Beijing areas from July 30 to August 4, 2002. It was pointed out that, under the control of subtropical anticyclone which stretches to the west and north, downdraft suppresses the lifting of lower-troposphere moisture, which makes moisture keep in the lower troposphere. That is the direct reason causing hot and humid weather. Considering the non-uniformity saturated character in real atmosphere, generalized moist potential vorticity (GMPV) equation is derived by the introduction of generalized moist potential temperature concept. The analysis of GMPV shows that negative GMPV anomaly occurs in the lower troposphere. It has indicative sense to hot and humid weather. Thus, the GMPV anomaly can be utilized to identify this kind of weather and to make a short-term prediction.

关键词： hot and humid weather, generalized moist potential vorticity, dynamical identification.

The Experiment and Simulation of Solid Desiccant Dehumidification for Air-Conditioning System in a Tropical humid Climate

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Engineering（科研） 2013年第1期5卷 146-153页

作者： Juntakan Taweekun Visit Akvanich Department of Mechanical Engineering Faculty of Engineering Prince of Songkla University

The aim of this research was to study and design a solid desiccant dehumidification system suitable for tropical climate to reduce the latent load of air-conditioning system and improve the thermal comfort. Different dehumidifiers such as desiccant column and desiccant wheel were investigated. The ANSYS and TRASYS software were used to predict the results of dehumidifiers and the desiccant cooling systems, respectively. The desiccant bed contained approximately 15 kg of silica-gel, with 3 mm average diameter. Results indicated that the pressure drop and the adsorption rate of desiccant column are usually higher than those of the desiccant wheel. The feasible and practical adsorption rate of desiccant wheel was 0.102 kgw/h at air flow rate 1.0 kg/min, regenerated air temperature of 55?C and at a wheel speed of 2.5 rpm. The humidity ratio of conditioning space and cooling load of split-type air conditioner was decreased to 0.002 kgw/kgda (14%) and 0.71 kWth (19.26%), respectively. Consequently, the thermal comfort was improved from 0.5 PMV (10.12% PPD) to 0.3 PMV (7.04% PPD).

关键词： Solid Desiccant Dehumidification Air-Conditioning System Tropical humid Climate

Occurrence and Epidemic Dynamics and Control Countermeasures of Important Sugarcane Diseases in Rainy and humid Season

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Plant Diseases and Pests 2017年第6期8卷 35-38页

作者： Li Wenfeng Shan Hongli Huang Yingkun Zhang Rongyue Cang Xiaoyan Yin Jiong Wang Xiaoyan Luo Zhiming Sugarcane Research Institute Yunnan Academy of Agricultural Science

The rainy and humid season from July to September is the crucial period for elongation and jointing and yield performance of sugarcane,and also a peak occurrence and damage period of many important sugarcane diseases. In order to prevent large-area outbreak of sugarcane diseases and ensure safe growth in late stage,the occurrence dynamics of important sugarcane diseases in the rainy and humid season was analyzed and discussed from the aspects of three epidemic outbreak elements of plant diseases: host plant,pathogen and environmental condition. Moreover,the corresponding control ideas and technical countermeasures were put forward according to the epidemic characteristic of sugarcane diseases and the actual sugarcane production.

关键词： Rainy and humid season Sugarcane diseases Occurrence dynamics Control countermeasure Technical measures

Microscopic Observation and Stability Study on the Fe_3s_4 Nanocrystals Synthesizedunder Thermal and humid Conditions

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矿物学报 2013年第S1期33卷 26-26页

作者： GAO Shang HUANG Fei SONG Dan LI Guanglu LIU Jia GAO Wenyuan LIU Qiang FENG Taiwei ZHAO Ran College of Resources and Civil Engineering Northeastern University

Fe3S4 is important magnetic mineral that widely exists in the sediments of lakes and oceans. It can not only instruct reducing environment that contains organic matter and sulfate, but also provide paleomagnetic signal for paleoenvironmet research. Simultaneously, as a new type of magnetic material, it causes attention. Because Fe3S4 generally exists as an unstable intermediate, it is stringent in preparation conditions. Although some scholars have conducted on the synthesis experiments of Fe3S4 materials, the research on its stable conditions, formation mechanism and evolution process is not yet depth. Accordingly, defining the stable conditions and revealing evolution law of Fe3S4 nanocrystals have important significance for the determination of environmental conditions and the preparation of pure Fe3S4 nanomaterials.

关键词： microscopic observation stability Fe3S4 thermal and humid conditions

Provenance and Paleoclimate of the Triassic to Middle Jurassic Adigrat Sandstone,Blue Nile Basin,Central Ethiopia

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Acta Geologica Sinica(English Edition) 2024年第4期98卷 1007-1020页

作者： Bekele BARSISA Ayalew DEREJE Kidanemariam GILAMICHAEL Atnafu BALEMWAL Raphaël PIK Department of Earth Sciences Wollega UniversityNekemteEthiopia Department of Earth Sciences Addis Ababa UniversityAddis AbabaEthiopia Departments of Anthropology Geography and GeologyEast Los Angeles CollegeLos AngelesCaliforniaUSA CRPG(UMR 7358 CNRS&Universitéde Lorraine) 15 rue ND des pauvres BP2054501 Vandoeuvre-Lès-Nancy CedexFrance

Mineralogical and geochemical studies have been undertaken on the Triassic to Lower Jurassic Adigrat Sandstone of the Blue Nile Basin of central Ethiopia to infer its source rock type,paleoweathering,and paleoclimatic *** Adigrat Sandstone occurs at the basal section of the Mesozoic sedimentary formation and unconformably overlays the Neoproterozoic–Paleozoic crystalline rocks,or locally,the Karroo sediments in the northern Blue Nile Basin.A mineralogical study reveals that quartz(Q),feldspars(F),and lithic fragments(L)are the framework grains of the *** the QFL diagram,the plot of the modal composition of the sandstone mainly falls within the feldspathic arenite and quartzose arenite *** geochemical data of the lower section of the sandstone mainly falls within the arkose and subarkose fields,whereas the upper section data falls within the quartzose and sublithic arenite *** and geochemical weathering indices indicate that the provenances of the Adigrat Sandstone were exposed to pronounced weathering intensity,where the lower part of the sandstone was controlled by arid to semi-arid conditions,whereas the upper section was linked to humid to semi-humid(tropical to subtropical)climatic *** and geochemical data also indicate that mafic to intermediate basement rocks were the primary source rocks of the *** the sediment was assumed to have been reworked by multi-cyclic sedimentary *** discriminant function diagram,the REE pattern,La/Th ***/Yb,and the Th–Hf–Co plot are consistent.A comparison of provenance studies for the Adigrat Sandstone in the Blue Nile Basin and the Mekele outlier of northern Ethiopia indicates that the sediment of the former is highly sorted,experienced higher weathering intensity,and compositionally derived from mafic to intermediate crystalline *** the other hand,the sediment of the latter is essentially a weathering product of felsic rocks.

关键词： mineralogical geochemical paleoweathering humid provenance Adigrat Sandstone