Simulation of water vapour condensation in a partly closed structure by using digitized experimental results

2020 ◽  
Author(s):  
Jean Batina ◽  
René Peyrous
Keyword(s):  
Water Vapour ◽  
Experimental Results ◽  
Closed Structure ◽  
Vapour Condensation

Comparison of water vapour condensation in vertically oriented pipes of condensers with internal and external heat rejection

Energy ◽  
2020 ◽  
Vol 208 ◽  
pp. 118388
Author(s):  
Filip Toman ◽  
Petr Kracík ◽  
Jiří Pospíšil ◽  
Michal Špiláček
Keyword(s):  
Water Vapour ◽  
External Heat ◽  
Heat Rejection ◽  
Vapour Condensation

Experiments on water vapour condensation within supersonic nozzle flow generated by an impulse tunnel

2021 ◽  
Vol 134 ◽  
pp. 103473
Author(s):  
Jafar Mahmoudian ◽  
Federico Mazzelli ◽  
Adriano Milazzo ◽  
Ray Malpress ◽  
David R. Buttsworth
Keyword(s):  
Water Vapour ◽  
Supersonic Nozzle ◽  
Nozzle Flow ◽  
Vapour Condensation

scholarly journals The infra-red absorption spectra of quartz and fused Silica from 1 to 7·5 μ II-Experimental results

1936 ◽  
Vol 153 (879) ◽  
pp. 328-339 ◽  
Keyword(s):  
Water Vapour ◽  
Absorption Spectra ◽  
Wave Length ◽  
Fused Silica ◽  
Experimental Results ◽  
Wave Number ◽  
Infra Red ◽  
The Mean ◽  
Point To Point ◽  
Maximum Discrepancy

The accuracy of calibration, as already mentioned, was checked against CO 2 and water vapour bands. With the quartz prism the instrument could be set to show the 2·7 μ CO 2 bands resolved and within about 0·003μ of their known wave-lengths*; i. e., within 4 cm -1 . With the fluorite prism, resolution at 2·7 μ was inferior, but the structure of the water vapour band centred at 6·3 μ provided about 20 points for the checking of wave-lengths. Here the maximum discrepancy was 5 cm -1 and the mean discrepancy about 1·5 cm -1 , The wave-number error, therefore, is not libels to exceed 5 cm -1 in any part of the range investigated. The fraction of radiation transmitted by a specimen was measured to three figures and a mean of two or three observations at least taken for each wave-length setting. The accuracy varies from specimen to specimen and from point to point throughout the spectrum, depending on the magnitude of the galvanometer deflexions obtainable. The error is, however, nowhere likely to be greater than 0·01 and for much of the work is of the order of 0·002.

scholarly journals The effect of water vapour on the behaviour of the oxygen electrode in molten nitrates

1972 ◽  
Vol 25 (9) ◽  
pp. 1831 ◽  
Author(s):  
M Fredericks ◽  
RB Temple
Keyword(s):  
Equilibrium Constant ◽  
Water Vapour ◽  
Oxygen Electrode ◽  
Experimental Results ◽  
Original Condition ◽  
Effect Of Water ◽  
A Value ◽  
Oxygen Gas

Water vapour has been deliberately introduced into an oxygen gas electrode in an equimolar NaXO3-KNO3 melt at 300�. When this is done the slope of the line obtained for ECe11 against log[O2-]Total changes from the 2.303RT/2F obtained with dry oxygen to almost exactly 2.303RT/F. On discontinuing the passage of water vapour into the melt, the cell reverts to its original condition within 3 hr. These experimental results are discussed theoretically. The results also yield a value of 3.2 x 10-2 for the equilibrium constant of the reaction O2 + H2O = 2OH-

Tritium and Deuterium Content of Atmospheric Hydrogen

1959 ◽  
Vol 14 (12) ◽  
pp. 1024-1031 ◽  
Author(s):  
Friedrich Begemann ◽  
Irving Friedman
Keyword(s):  
Seasonal Variation ◽  
Water Vapour ◽  
Thermodynamic Equilibrium ◽  
Lake Michigan ◽  
Ground Level ◽  
Correlation Factor ◽  
Experimental Results ◽  
Deuterium Content ◽  
Tritium Content ◽  
Noticeable Increase

The tritium and deuterium content of 24 samples of atmospheric hydrogen collected at ground level near Buffalo. N.Y. (U.S.A.). Hamburg (Germany), and Nürnberg (Germany) during 1954 to 1956 was measured.At the beginning of 1954 the T/H-ratio was found to have been 9.18 · 10-14 i.e. about a factor of 10 higher than 1949 (FALTINGS and HARTECK) and 1951 (v. GROSSE et al.), probably due to the first explosion of a thermonuclear device in November 1952. In spite of a major test series of thermonuclear weapons in spring of 1954 (Operation CASTLE) no further increase in the tritium content was found during 1954 and 1955. It shows instead a seasonal variation with low tritium content in summer and about a threefold higher one in winter. Simultaneously, there is a good correlation between the tritium and deuterium concentrations. From 1956 on a noticeable increase in the tritium content due to more man-made HT produced or released by thermonuclear devices into the atmosphere was found, in agreement with measurements by GONSIOR. A possible explanation of the experimental results as well as a mode to test the validity of the model suggested is given.The deuterium concentrations of the samples analysed vary between about +7 percent and –17 percent, compared to Standard Lake Michigan Water with a ratio D/H = 0.0148 ± 0.0002 mol percent. Although from these results only a correlation factor between the tritium and deuterium content of “mean atmospheric hydrogen” and not their absolute values can be derived it is obvious that atmospheric hydrogen and the water vapour of the atmosphere are not in thermodynamic equilibrium, as has been pointed out before by HARTECK and SUESS.

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