The dynamic evaporation process of the deep eutectic solvent LiTf2N:N-methylacetamide at ambient temperature

2019 ◽  
Vol 21 (22) ◽  
pp. 11810-11821 ◽  
Author(s):  
Yu Chen ◽  
Dongkun Yu ◽  
Li Fu ◽  
Meng Wang ◽  
Dongran Feng ◽  
...  
Keyword(s):  
Ambient Temperature ◽  
Deep Eutectic Solvent ◽  
Evaporation Process ◽  
Ambient Conditions ◽  
Three Stages

The dynamic evaporation process of the lithium-based deep eutectic solvent LiTf2N:NMA under ambient conditions can be divided into three stages.

Formation of Dislocation Channels in Neutron Irradiated Molybdenum

1972 ◽  
Vol 30 ◽  
pp. 672-673
Author(s):  
S. Mahajan
Keyword(s):  
Electron Microscopy ◽  
Transmission Electron Microscopy ◽  
Ambient Temperature ◽  
Room Temperature ◽  
Channel Formation ◽  
Early Stages ◽  
Transmission Electron ◽  
Three Stages ◽  
Two Stages ◽  
Polycrystalline Molybdenum

The evolution of dislocation channels in irradiated metals during deformation can be envisaged to occur in three stages: (i) formation of embryonic cluster free regions, (ii) growth of these regions into microscopically observable channels and (iii) termination of their growth due to the accumulation of dislocation damage. The first two stages are particularly intriguing, and we have attempted to follow the early stages of channel formation in polycrystalline molybdenum, irradiated to 5×1019 n. cm−2 (E > 1 Mev) at the reactor ambient temperature (∼ 60°C), using transmission electron microscopy. The irradiated samples were strained, at room temperature, up to the macroscopic yield point.Figure 1 illustrates the early stages of channel formation. The observations suggest that the cluster free regions, such as A, B and C, form in isolated packets, which could subsequently link-up to evolve a channel.

Industrial Trent Combustor — Combustion Noise Characteristics

1999 ◽  
Author(s):  
Thomas Scarinci ◽  
John L. Halpin
Keyword(s):  
Fuel Injection ◽  
Power Level ◽  
Technical Problem ◽  
Combustion Noise ◽  
Ambient Conditions ◽  
Noise Mapping ◽  
Noise Characteristics ◽  
Lean Premixed ◽  
In Series ◽  
Three Stages

Thermoacoustic resonance is a difficult technical problem that is experienced by almost all lean-premixed combustors. The Industrial Trent combustor is a novel dry-low-emissions (DLE) combustor design, which incorporates three stages of lean premixed fuel injection in series. The three stages in series allow independent control of two stages — the third stage receives the balance of fuel to maintain the desired power level — at all power conditions. Thus, primary zone and secondary zone temperatures can be independently controlled. This paper examines how the flexibility offered by a 3-stage lean premixed combustion system permits the implementation of a successful combustion noise avoidance strategy at all power conditions and at all ambient conditions. This is because at a given engine condition (power level and day temperature) a characteristic “noise map” can be generated on the engine, independently of the engine running condition. The variable distribution of heat release along the length of the combustor provides an effective mechanism to control the amplitude of longitudinal resonance modes of the combustor. This approach has allowed the Industrial Trent combustion engineers to thoroughly “map out” all longitudinal combustor acoustic modes and design a fuel schedule that can navigate around regions of combustor thermoacoustic resonance. Noise mapping results are presented in detail, together with the development of noise prediction methods (frequency and amplitude) that have allowed the noise characteristics of the engine to be established over the entire operating envelope of the engine.

Quaternary Type IV Deep Eutectic Solvent-Based Tungsten Oxide/Niobium Oxide Photochromic and Reverse Fading Composite Complex

2021 ◽  
Author(s):  
Onome Ejeromedoghene ◽  
Xiangyu Ma ◽  
Olayinka Oderinde ◽  
Fang Yao ◽  
Adewuyi Sheriff ◽  
...  
Keyword(s):  
Tungsten Oxide ◽  
Niobium Oxide ◽  
Deep Eutectic Solvent ◽  
Ambient Conditions ◽  
Solvothermal Route ◽  
Type Iv

A new quaternary type IV deep eutectic solvent (DES) was prepared for the synthesis of WO3/Nb2O5 complexes via a facile solvothermal route under ambient conditions. The PXRD confirms the formation...

scholarly journals Physical and chemical characteristics of sapota fruit at different stages of maturation

2002 ◽  
Vol 37 (4) ◽  
pp. 567-572 ◽  
Author(s):  
Edy Sousa de Brito ◽  
Narendra Narain
Keyword(s):  
Storage Time ◽  
Reducing Sugars ◽  
Chemical Characteristics ◽  
Weight Retention ◽  
Ambient Conditions ◽  
Manilkara Zapota ◽  
Post Harvest ◽  
Physical And Chemical Characteristics ◽  
Three Stages ◽  
Physical And Chemical

In the present work, the physical and chemical characteristics in three stages of maturation of sapota (Manilkara zapota L.P. Royen) fruit were studied as well as its post-harvest behavior during storage at ambient and refrigerated conditions. With the advance of maturation, the concentration of the reducing sugars increased while the total acidity and tannin contents decreased. The fruits which did not have their pedicel removed during the post-harvest presented the storage time superior when compared with the fruits having their pedicels removed. The fruits stored under refrigeration had higher weight retention as compared to the fruits stored under ambient conditions.

Physiology of Oil Seeds. X. Seed Quality of Peanut Genotypes as Affected by Ambient Storage Temperature1

1992 ◽  
Vol 19 (2) ◽  
pp. 72-77 ◽  
Author(s):  
Darold L. Ketring
Keyword(s):  
Ambient Temperature ◽  
Seedling Growth ◽  
Seed Quality ◽  
Storage Temperature ◽  
Storage Conditions ◽  
Ambient Conditions ◽  
Ambient Storage ◽  
Wide Range ◽  
Genotype Diversity ◽  
Field Emergence

Abstract Proper storage of peanut (Arachis hypogaea L.) pods following drying is a critical step in maintenance of seed quality for the next planting season. The objective of this study was to examine the effect of ambient storage temperature (similar to farmers stock peanuts stored in warehouses) on seed germination and seedling vigor of selected peanut genotypes. Peanuts were grown in the field for three successive seasons. Pods were harvested, dried, and shelled. Seed samples were taken for storage under ambient conditions, humidity effects were eliminated by storing the seeds in plastic freezer bags in sealed containers. Seasons were: (1) 1986, 19 months storage at ambient temperature, (2) 1987, 7 months storage at ambient temperature, and (3) 1988, seeds without storage. When comparisons were made among genotypes within seasons, exposure to Season 1 conditions resulted in the least germination and seedling growth, but a wide range of genotype diversity occurred. Germination of seeds from Seasons 2 and 3 ranged from 81 to 98%, and significant differences in seedling growth occurred among genotypes. When comparisons were made across Seasons, the data indicated a significant storage effect, which resulted in different seed quality for individual genotypes. Usually field emergence was significantly different among genotypes and was highly correlated with germination for all seasons. Generally, emergence was negatively correlated with slow seedling growth and positively correlated with rapid seedling growth. Thus, for seeds of lower vigor (Seasons 1 and 2), rapid seedling growth was particularly critical for early, uniform emergence (10 DAP) in the field. Genotypes were significantly different in extent of seed quality reduction and field emergence both within and across storage periods. Genotype diversity to ambient storage conditions suggests there is genetic potential to improve longevity of seed quality during storage and enhance stability of field emergence.

Measurement of the work function of Y1Ba2Cu3O7−δ under ambient conditions

1993 ◽  
Vol 8 (7) ◽  
pp. 1497-1500 ◽  
Author(s):  
Jon DeVries ◽  
Steve S. Wakisaka ◽  
Erik R. Spjut
Keyword(s):  
Standard Deviation ◽  
Ambient Temperature ◽  
Work Function ◽  
Ambient Conditions ◽  
Minimum Value ◽  
Electrodynamic Balance

The photoelectric work function of samples of Y1Ba2Cu3O7−δ of approximately 40 μm diameter was measured under ambient temperature and atmosphere in an electrodynamic balance. The measured values had an average of 4.98 eV and a standard deviation of 0.24 eV. The minimum value was 4.46 eV and the maximum was 5.52 eV.

Study on Critical Moisture Content of Unsaturated Evaporation

2014 ◽  
Vol 513-517 ◽  
pp. 2643-2646
Author(s):  
Hua Zhang ◽  
Wen Long Hu ◽  
Jin Lu Cao
Keyword(s):  
Moisture Content ◽  
Thin Layer ◽  
Measuring System ◽  
Evaporation Process ◽  
Critical Moisture Content ◽  
Whole Process ◽  
Critical Moisture ◽  
Three Stages ◽  
Soil Water Characteristic Curves ◽  
Water Contents

Thin layer evaporation tests of three types of soil were conducted by a newly designed humidity-controllable evaporation and penetration measuring system and lasted for 8 days. The whole process of sample mass variation from wet to dry was recorded in the laboratory. The critical moisture content and air-dried moisture content were obtained from evaporation curve, which divided the evaporation process of thin layer unsaturated soil into three stages, including stable rate stage, reducing rate stage and residual stage. The soil water characteristic curves of soils were predicted by Arya and Paris model, the results showed that the critical moisture contents of evaporation process were the same with the water contents corresponding to residue values of SWCC, it is significant to studying on unsaturated evaporation process.

scholarly journals Effects of Ambient Parameters on the Performance of a Direct-Expansion Solar-Assisted Heat Pump with Bare Plate Evaporators for Space Heating

2017 ◽  
Vol 2017 ◽  
pp. 1-10 ◽  
Author(s):  
Wenzhu Huang ◽  
Jie Ji ◽  
Mawufemo Modjinou ◽  
Jing Qin
Keyword(s):  
Relative Humidity ◽  
Ambient Temperature ◽  
Heat Pump ◽  
Solar Irradiance ◽  
Solar Irradiation ◽  
Space Heating ◽  
Direct Expansion ◽  
Ambient Conditions ◽  
Solar Simulator ◽  
Independent Effects

Research on the direct-expansion solar-assisted heat pump (DX-SAHP) system with bare plate evaporators for space heating is meaningful but insufficient. In this paper, experiments on a DX-SAHP system applying bare plate evaporators for space heating are conducted in the enthalpy difference lab with a solar simulator, with the ambient conditions stable. The independent effects of ambient temperature, solar irradiation, and relative humidity on the system performance are investigated. When ambient temperature changes as 5°C, 10°C, and 15°C, COP increases as 2.12, 2.18, and 2.26. When solar irradiance changes as 0 W m−2, 100 W m−2, 200 W m−2, 300 W m−2, and 500 W m−2, COP of the system changes as 2.07, 2.09, 2.14, 2.26, and 2.36. With ambient temperature of 5°C and solar irradiance of 0 W m−2, when relative humidity is 50%, no frost formed. Whereas with relative humidity of 70% and 90%, frost formed but not seriously frosted after 120 min of operating. Frost did not deteriorate but improved the heating performance of the DX-SAHP system. The change of relative humidity from 70% to 90% improves the evaporating heat exchange rate by 35.0% and increases COP by 16.3%, from 1.78 to 2.07.

scholarly journals THE INFLUENCE OF AMBIENT CONDITIONS ON THE PERFORMANCE OF THE THERMOELECTRIC WIRELESS SENSOR NETWORK NODE

2019 ◽  
pp. 089
Author(s):  
Dejan Milić ◽  
Aneta Predrag Prijić ◽  
Ljubomir Vračar ◽  
Zoran Prijić
Keyword(s):  
Wireless Sensor Network ◽  
Ambient Temperature ◽  
Sensor Network ◽  
Temperature Difference ◽  
Thermoelectric Generator ◽  
Open Circuit ◽  
Wireless Sensor ◽  
Network Node ◽  
Ambient Conditions ◽  
Hot Surface

This paper considers the effects of the ambient temperature and unducted air flow on the voltage generated by a thermoelectric generator used to power wireless sensor network node. Structure of the node is simulated using a fully coupled numerical electro--thermal model with convective correlations. Results show that the effect of the ambient temperature is negligible as long as the temperature difference between the hot surface of the node and the ambient is maintained. For natural convection, voltage dependence on the temperature difference can be determined from the open circuit conditions and this can be used to approximate the load conditions. For forced convection, an increase rate of the generated voltage is governed by the thermal resistance of the heatsink and characteristic parameters of the thermoelectric generator.

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