Bright points in Ha wings and connected mass flows in the solar chromosphere

2006 ◽  
pp. 203-207
Author(s):  
P. Mein ◽  
J. -M. Malherbe ◽  
Z. Mouradian ◽  
N. Mein ◽  
R. Muller
Keyword(s):  
Solar Chromosphere ◽  
Mass Flows

Structured methods for improving flow measurement accuracy in pipelines

2020 ◽  
pp. 30-35
Author(s):  
Gurami N. Akhobadze
Keyword(s):  
Flow Measurement ◽  
Measurement Accuracy ◽  
Directional Coupler ◽  
Signal To Noise Ratio ◽  
Scattered Wave ◽  
Orthogonal Polarization ◽  
Flow Sensors ◽  
Information Signal ◽  
Mass Flows ◽  
Processing Device

In the age of digital transformation of production processes in industry and science the development and design of intelligent flow sensors for granular and liquid substances transferring through pipelines becomes more important. With this in view new approaches for improving the accuracy of microwave flowmeters are proposed. Taking into account the characteristics ofelectromagnetic waves propagating through a pipeline, a wave scattered by inhomogeneities of the controlled medium is analyzed. Features of the transformation of the polarized scattered wave limiting the geometric dimensions of the pipeline and optimizing the values of the useful scattered signal are revealed. Expediency of collection of the information signal with orthogonal polarization of the scattered wave and through a directional coupler is substantiated. The method of estimating the measurement accuracy with reference to the signal-to-noise ratio at the input of the processing device is given. The research results can be used in cryogenic machine engineering to measure volume and mass flows of liquid cryogenic products.

scholarly journals Turbulent Sound Generation in Red Dwarf Stars

1983 ◽  
Vol 71 ◽  
pp. 605-608
Author(s):  
H.U. Bonn
Keyword(s):  
Current Model ◽  
Solar Chromosphere ◽  
Sound Generation ◽  
Dwarf Star ◽  
Dwarf Stars ◽  
Model Calculations ◽  
Red Dwarf Stars

Since the acoustic heating theory (c.f. Ulmschneider 1979) has been proven successful for the solar chromosphere, it was common practice to extend this concept to other stars. However, as it appeares from observed chromospheric and coronal emissions, the usual theoretical acoustic fluxes for red dwarf star, particularly, are too small to account for the heating of chromospheres and coronae (e.g. Blanco et al 1974; Vaiana et al, 198l) . It is therefore the intention of this paper to discuss improvements on the current model calculations for turbulent sound generation from outer convection zones.

scholarly journals Sensitivity Analysis of OTEC-CC-MX-1 kWe Plant Prototype

Energies ◽  
2021 ◽  
Vol 14 (9) ◽  
pp. 2585
Author(s):  
Jessica Guadalupe Tobal-Cupul ◽  
Estela Cerezo-Acevedo ◽  
Yair Yosias Arriola-Gil ◽  
Hector Fernando Gomez-Garcia ◽  
Victor Manuel Romero-Medina
Keyword(s):  
Sensitivity Analysis ◽  
Experimental Tests ◽  
Caribbean Sea ◽  
Ocean Model ◽  
Operating Conditions ◽  
Working Fluid ◽  
Ocean Energy ◽  
Mexican Caribbean ◽  
Water Temperature Data ◽  
Mass Flows

The Mexican Caribbean Sea has potential zones for Ocean Thermal Energy Conversion (OTEC) implementation. Universidad del Caribe and Instituto de Ciencias del Mar y Limnologia, with the support of the Mexican Centre of Innovation in Ocean Energy, designed and constructed a prototype OTEC plant (OTEC-CC-MX-1 kWe), which is the first initiative in Mexico for exploitation of this type of renewable energy. This paper presents a sensitivity analysis whose objective was to know, before carrying out the experimental tests, the behavior of OTEC-CC-MX-1 kWe regarding temperature differences, as well as the non-possible operating conditions, which allows us to assess possible modifications in the prototype installation. An algorithm was developed to obtain the inlet and outlet temperatures of the water and working fluid in the heat exchangers using the monthly surface and deep-water temperature data from the Hybrid Coordinate Ocean Model and Geographically Weighted Regression Temperature Model for the Mexican Caribbean Sea. With these temperatures, the following were analyzed: fluctuation of thermal efficiency, mass flows of R-152a and water and power production. By analyzing the results, we verified maximum and minimum mass flows of water and R-152a to produce 1 kWe during a typical year in the Mexican Caribbean Sea and the conditions when the production of electricity is not possible for OTEC-CC-MX-1 kWe.

The solar chromosphere and corona: Quiet Sun

1977 ◽  
Vol 25 (9) ◽  
pp. 893-894
Author(s):  
Carole Jordan
Keyword(s):  
Solar Chromosphere ◽  
Quiet Sun

On the solar chromosphere

1875 ◽  
Vol s3-10 (60) ◽  
pp. 489-496
Author(s):  
S. P. Langley
Keyword(s):  
Solar Chromosphere

Screening of Human Antibiotic Substances and Determination of Weekly Mass Flows in Five Sewage Treatment Plants in Sweden

2005 ◽  
Vol 39 (10) ◽  
pp. 3421-3429 ◽  
Author(s):  
Richard H. Lindberg ◽  
Patrik Wennberg ◽  
Magnus I. Johansson ◽  
Mats Tysklind ◽  
Barbro A. V. Andersson
Keyword(s):  
Sewage Treatment ◽  
Sewage Treatment Plants ◽  
Mass Flows

scholarly journals Overdamped Alfvén waves due to ion-neutral collisions in the solar chromosphere

2014 ◽  
Vol 573 ◽  
pp. A79 ◽  
Author(s):  
R. Soler ◽  
J. L. Ballester ◽  
T. V. Zaqarashvili
Keyword(s):  
Alfven Waves ◽  
Alfvén Waves ◽  
Solar Chromosphere

High-frequency acoustic waves are not sufficient to heat the solar chromosphere

Nature ◽  
2005 ◽  
Vol 435 (7044) ◽  
pp. 919-921 ◽  
Author(s):  
Astrid Fossum ◽  
Mats Carlsson
Keyword(s):  
Acoustic Waves ◽  
High Frequency ◽  
Solar Chromosphere
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