Experimental and comparative study on material effect of vortex tube on the cold outlet air temperature

2019 ◽  
Author(s):  
G. Sankaraiah ◽  
G. Suresh Kumar ◽  
V. Satish Kumar ◽  
P. Venkateshwar Reddy
Keyword(s):  
Comparative Study ◽  
Air Temperature ◽  
Vortex Tube

scholarly journals Распределение температуры на оси камеры расширения при различных схемах работы вихревой трубы

2021 ◽  
Vol 47 (19) ◽  
pp. 41
Author(s):  
В.Н. Самохвалов
Keyword(s):  
Air Temperature ◽  
Vortex Tube ◽  
Axial Zone ◽  
Expansion Chamber ◽  
Counter Flow ◽  
Heating And Cooling ◽  
Flow Vortex ◽  
Single Flow ◽  
Vortex Tubes ◽  
Nozzle Inlet

The change in air temperature along the axis of the expansion chamber in the zones of the nozzle inlet and the flow swirler in the direct-flow, counter-flow, three-flow and single-flow vortex tubes has been investigated. It has been established that in all cases, the cooling of air in the vortex tube occurs in the zone of the swirling device, and its heating - in the zone of unwinding of the flow. The change in air temperature in the axial zone along the length of the expansion chamber occurs due to heat exchange between the heating and cooling zones.

scholarly journals Statistical Comparative Study of the Trend and Variation of Meteorological Parameters in Abeokuta, South-West Nigeria

2019 ◽  
pp. 1-15
Author(s):  
M. A. Sodunke ◽  
M. O. Sulaimon ◽  
R. S. Sunmonu ◽  
A. Mabosanyinje ◽  
Y. B. Lawal ◽  
...  
Keyword(s):  
Wind Speed ◽  
Relative Humidity ◽  
Comparative Study ◽  
Air Temperature ◽  
Coefficient Of Variation ◽  
Vapour Pressure ◽  
Meteorological Parameters ◽  
Significance Level ◽  
Significant Difference ◽  
The Mean

This study focuses on the statistical comparative study of the trend and variation of meteorological parameters covering a 10 year period (2001-2010) in the capital and largest city of Ogun State, Abeokuta, southwest region of Nigeria. The analyzed meteorological parameters were: wind speed, vapour pressure, relative humidity, temperature, sunshine and rainfall covering 10 years. The calculated coefficient of variation (CV) for sunshine (22.78%), wind speed (21.55%), and rainfall (99.12%) is a proof of exceedance of variability of threshold of 10% while the CV calculated for  air temperature (5.74%), relative humidity (4.52%) and vapour pressure (5.22%) show no significant variability. Significance test of meteorological parameters’ trend reveals a notable reduction in the values of vapour pressure, air temperature and relative humidity. It is, however, difficult to argue for a well-defined change in most of the meteorological parameters based on the monthly time series analyses performed in this work. Only wind speed shows a statistically significant increasing trend during the period of observation at 1% significance level. The trend revealed by rainfall and sunshine is statistically not significant. ANOVA test of significant difference among meteorological parameters show a p-value (Sig.) of 0.000 is an indication of the significant difference in the analyzed mean monthly coefficient of variation for the meteorological parameters under study. The Tukey’s multiple pair comparisons test, however, show that there is a significant difference between the mean monthly CV of rainfall–sunshine, rainfall-vapour pressure, rainfall-wind speed, rainfall-air temperature and rainfall-relative humidity. At the significance level of 5%, the calculated mean monthly CV of rainfall is significantly different from the mean monthly CV of other climatic parameters.

scholarly journals Daily amplitude of air temperature in Poland and Bulgaria - a comparative study

Europa XXI ◽  
2015 ◽  
Vol 29 ◽  
pp. 85-94
Author(s):  
Jakub Szmyd ◽  
Paweł Milewski
Keyword(s):  
Comparative Study ◽  
Air Temperature

Comparative Study Between Vortex Tube Refrigeration System and Regular Air Conditioner

2019 ◽  
Author(s):  
Rahu Sharma ◽  
Sarthak Nagori ◽  
Shailendra Dubey ◽  
Sheikh Mohd. Faizan ◽  
Yogesh Kadam
Keyword(s):  
Comparative Study ◽  
Vortex Tube ◽  
Air Conditioner ◽  
Refrigeration System
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