Laboratory parameters for high water based hydraulic fluid testing

1987 ◽  
Vol 3 (4) ◽  
pp. 293-308
Author(s):  
D. G. Hughes ◽  
J. W. Forsberg
Keyword(s):  
High Water ◽  
Hydraulic Fluid ◽  
Laboratory Parameters ◽  
Water Based

scholarly journals Ultralow-temperature-driven water-based sorption refrigeration enabled by low-cost zeolite-like porous aluminophosphate

2022 ◽  
Vol 13 (1) ◽  
Author(s):  
Zhangli Liu ◽  
Jiaxing Xu ◽  
Min Xu ◽  
Caifeng Huang ◽  
Ruzhu Wang ◽  
...  
Keyword(s):  
Low Temperature ◽  
Water Sorption ◽  
High Performance ◽  
Global Climate ◽  
Low Cost ◽  
Cost Effective ◽  
High Water ◽  
Coefficient Of Performance ◽  
High Efficient ◽  
Water Based

AbstractThermally driven water-based sorption refrigeration is considered a promising strategy to realize near-zero-carbon cooling applications by addressing the urgent global climate challenge caused by conventional chlorofluorocarbon (CFC) refrigerants. However, developing cost-effective and high-performance water-sorption porous materials driven by low-temperature thermal energy is still a significant challenge. Here, we propose a zeolite-like aluminophosphate with SFO topology (EMM-8) for water-sorption-driven refrigeration. The EMM-8 is characterized by 12-membered ring channels with large accessible pore volume and exhibits high water uptake of 0.28 g·g−1 at P/P0 = 0.2, low-temperature regeneration of 65 °C, fast adsorption kinetics, remarkable hydrothermal stability, and scalable fabrication. Importantly, the water-sorption-based chiller with EMM-8 shows the potential of achieving a record coefficient of performance (COP) of 0.85 at an ultralow-driven temperature of 63 °C. The working performance makes EMM-8 a practical alternative to realize high-efficient ultra-low-temperature-driven refrigeration.

Effect of Mineral Filler Compounds on Vapor Permeability and Hygroscopic Properties of Water-Based Polymer Dispersions

2019 ◽  
Vol 968 ◽  
pp. 89-95 ◽  
Author(s):  
Natalia Vyacheslavovna Saienko ◽  
Dmitriy Vasilevich Demidov ◽  
Yuri Viktorovich Popov ◽  
Roman Aleksandrovich Bikov ◽  
Basheer Younis ◽  
...  
Keyword(s):  
High Water ◽  
Vapor Permeability ◽  
Mineral Filler ◽  
Protective Material ◽  
Pairwise Correlation ◽  
Hygroscopic Properties ◽  
Water Vapour Diffusion ◽  
Water Based ◽  
Protection Theory ◽  
Polymer Dispersions

The effect of mineral filler compounds on vapor permeability and hygroscopic properties of water-based polymer dispersions and the possibility of their use as decorative and protective material for stucco facades finishing was studied. According to Facade Protection Theory (H.M. Künzel), the assessment criterion was vapor permeability and water vapor diffusivity. The pairwise correlation of building physical properties of water-based polymer dispersions in the coordinates of Künzel's diagram clearly demonstrates that, in terms of hygroscopic, all the samples studied correspond to the low hygroscopic class, and in terms of vapor, they are close to high water vapour diffusion rate class.

Colorimetric and ratiometric fluorescence sensing of water based on 9-methyl pyrido[3,4-b]indole-boron trifluoride complex

2019 ◽  
Vol 48 (6) ◽  
pp. 2086-2092 ◽  
Author(s):  
Toshiaki Enoki ◽  
Yousuke Ooyama
Keyword(s):  
Water Content ◽  
Boron Trifluoride ◽  
Fluorescent Sensor ◽  
High Water ◽  
High Water Content ◽  
Ratiometric Fluorescence ◽  
Fluorescence Sensing ◽  
Water Based ◽  
Ratiometric Fluorescence Sensing ◽  
Boron Trifluoride Complex

9-Methyl pyrido[3,4-b]indole-boron trifluoride complex 9-MP-BF3 was developed as a colorimetric and ratiometric fluorescent sensor for the detection of water from the low- to high-water-content regions in solvents.

scholarly journals High-Efficiency Glass and Printable Flexible Dye-Sensitized Solar Cells with Water-Based Electrolytes

2014 ◽  
Vol 2014 ◽  
pp. 1-7 ◽  
Author(s):  
Omar Moudam ◽  
Silvia Villarroya-Lidon
Keyword(s):  
High Efficiency ◽  
Positive Impact ◽  
Pure Water ◽  
Dye Sensitized Solar Cells ◽  
Solar Spectrum ◽  
Electrolyte Solutions ◽  
High Water ◽  
High Water Content ◽  
Dye Sensitized ◽  
Water Based

The performance of a flexible and glass dye-sensitized solar cell (DSSC) with water-based electrolyte solutions is described. High concentrations of alkylamidazoliums were used to overcome the deleterious effect of water and, based on this variable, pure water-based electrolyte DSSCs were tested displaying the highest recorded efficiency so far of 3.45% and 6% for flexible and glass cells, respectively, under a simulated air mass 1.5 solar spectrum illumination at 100 mWcm−2. An improvement in the Jsc with high water content and the positive impact of GuSCN on the enhancement of the performance of pure water-based electrolytes were also observed.

scholarly journals Tribological Properties of ZrO2 Coating on the Ball Joint of an Axial Piston Pump in High Water-Based Emulsion Medium

2021 ◽  
Vol 2021 ◽  
pp. 1-16
Author(s):  
Baofu Kou ◽  
Zhenshun Li ◽  
Zhang Zhang ◽  
Ruiqing Li
Keyword(s):  
Friction Coefficient ◽  
Friction And Wear ◽  
High Water ◽  
Wear Loss ◽  
Ball Joint ◽  
Zro2 Coating ◽  
Ceramic Ball ◽  
Water Based ◽  
Axial Piston ◽  
Emulsion Concentration

This paper studies the tribological properties of the ZrO2-coated spherical joint pair of the axial piston pump in a high water-based emulsion medium. Firstly, atmospheric plasma spraying was used to prepare the ZrO2 coating on the surface of the spherical joint pair. Secondly, the tribological characteristics of the steel-steel pair and ceramic-ceramic pair were analyzed by the friction and wear testing machine under the conditions of a high water-based emulsion concentration, load size, and load frequency. White light interference three-dimensional surface profiler and scanning electron microscope were used to analyze the original and worn surfaces of the samples, and then the friction and wear of the different material pairs were discussed. The results show that the friction reduction and wear resistance of the ceramic ball joint are superior to those of the steel ball joint. When the load is 100 N, the frequency is 1 Hz, and the emulsion concentration is 5%, and the friction coefficient and wear loss of the ceramic-ceramic ball joint pair are the lowest. The emulsion concentration and load have great influence on the friction coefficient and wear amount, while the frequency has little influence on them. With increasing concentration of the emulsion, the friction coefficient decreases and tends to be stable, but with increasing of load, the friction coefficient and wear increase. The friction coefficient and wear loss of the ceramic-ceramic ball joint in pure water are 0.25 times higher than those of the steel ball joint under the same working conditions. Therefore, when the concentration of the high water-based emulsion is 5%, 100 N load, 1 Hz frequency, the ceramic-ceramic ball joints display the best friction and wear resistance of the two. The research results provide a theoretical basis for the design, manufacture, and application of the ceramic coating hydraulic components in a high water-based emulsion medium.

scholarly journals An Attempt to Develop a New Fire-Resistant Hydraulic Fluid Based on Water-in-Oil Microemulsions

1994 ◽  
Vol 2 (2) ◽  
pp. 83-104
Author(s):  
N. Garti ◽  
A. Aserin ◽  
S. Ezrahi
Keyword(s):  
Phase Diagrams ◽  
High Water ◽  
Model Systems ◽  
High Water Content ◽  
Hydraulic Fluid ◽  
Structural Factors ◽  
Scanning Calorimetry ◽  
Hydraulic Fluids ◽  
Nmr Methods ◽  
Water Solubilization

The strategy for the development of microemulsion-based fire-resistant hydraulic fluids has been expounded. Phase diagrams were constructed for mixtures of water, oil, and nonionic surfactants with and without cosurfactants. From these phase diagrams, the boundaries of the monophasic area were outlined. After the major components had thus been determined, several preliminary formulations were developed by incorporating suitable additives into the oleic ingredient of the hydraulic fluid. These carefully chosen additives considerably improve the performance of the hydraulic fluid. The resulting microemulsion-based compositions complied with most of the requirements set for fire-resistant hydraulic fluids. Model systems pertinent to such formulations were utilized in order to investigate structural factors, which induce enhanced water solubilization. The role played by alcohols in this context was elucidated in terms of an empirical equation. Sophisticated scattering and NMR methods have demonstrated the variations in the microstructure of a high water content model system. Sub-zero differential scanning calorimetry (DSC) techniques have revealed the existence of two types of water (free and bound) and determined their relative concentrations.

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