A practical computerized atmospheric pollution dispersion model with altitude‐dependent diffusivities: application to carbon monoxide concentration calculation

1981 ◽  
Vol 16 (2) ◽  
pp. 91-100
Author(s):  
D. C. Chou ◽  
J. Y. Sung
Keyword(s):  
Carbon Monoxide ◽  
Atmospheric Pollution ◽  
Dispersion Model ◽  
Pollution Dispersion ◽  
Carbon Monoxide Concentration

Pollutant emission from a heat station supplied with agriculture biomass and wood pellet mixture

2012 ◽  
Vol 33 (2) ◽  
pp. 231-242 ◽  
Author(s):  
Marek Juszczak ◽  
Katarzyna Lossy
Keyword(s):  
Carbon Monoxide ◽  
Pollutant Emission ◽  
Heat Output ◽  
Wood Pellets ◽  
Wood Pellet ◽  
Carbon Monoxide Concentration ◽  
Heat Efficiency ◽  
Air Stream ◽  
Fuel Mixtures ◽  
Lower Carbon

Pollutant emission from a heat station supplied with agriculture biomass and wood pellet mixtureTests for combustion of hay and sunflower husk pellets mixed with wood pellets were performed in a horizontal-feed as well as under-feed (retort) wood pellet furnace installed in boilers with a nominal heat output of 15 and 20 kW, located in a heat station. During the combustion a slagging phenomenon was observed in the furnaces. In order to lower the temperature in the furnace, fuel feeding rate was reduced with unaltered air stream rate. The higher the proportion of wood pellets in the mixture the lower carbon monoxide concentration. The following results of carbon monoxide concentration (in mg/m3presented for 10% O2content in flue gas) for different furnaces and fuel mixtures (proportion in wt%) were obtained: horizontal-feed furnace supplied with hay/wood: 0/100 - 326; 30/70 - 157; 50/50 - 301; 100/0 - 3300; horizontal-feed furnace supplied with sunflower husk/wood: 50/50 - 1062; 67/33 - 1721; 100/0 - 3775; under-feed (retort) furnace supplied with hay/wood: 0/100 - 90; 15/85 - 157; 30/70 - 135; 50/50 - 5179; under-feed furnace supplied with sunflower husk/wood: 67/33 - 2498; 100/0 - 3128. Boiler heat output and heat efficiency was low: 7 to 13 kW and about 55%, respectively, for the boiler with horizontal-feed furnace and 9 to 14 kW and 64%, respectively, for the boiler with under-feed furnace.

scholarly journals The Neural Network Assisted Land Use Regression

Atmosphere ◽  
2021 ◽  
Vol 12 (4) ◽  
pp. 452
Author(s):  
Jan Bitta ◽  
Vladislav Svozilík ◽  
Aneta Svozilíková Krakovská
Keyword(s):  
Neural Network ◽  
Land Use ◽  
Linear Regression ◽  
Dispersion Model ◽  
Land Use Regression ◽  
Emission Data ◽  
Pollution Dispersion ◽  
Factors Affecting ◽  
Standard Linear

Land Use Regression (LUR) is one of the air quality assessment modelling techniques. Its advantages lie mainly in a much simpler mathematical apparatus, quicker and simpler calculations, and a possibility to incorporate more factors affecting pollutant concentration than standard dispersion models. The goal of the study was to perform the LUR model in the Polish-Czech-Slovakian Tritia region, to test two sets of pollution data input factors, i.e., factors based on emission data and pollution dispersion model results, to test regression via neural networks and compare it with standard linear regression. Both input datasets, emission data and pollution dispersion model results, provided a similar quality of results in the case when standard linear regression was used, the R2 of the models was 0.639 and 0.652. Neural network regression provided a significantly higher quality of the models, their R2 was 0.937 and 0.938 for the factors based on emission data and pollution dispersion model results respectively.

scholarly journals PREDICTION OF CARBON MONOXIDE (CO) ATMOSPHERIC POLLUTION CONCENTRATIONS USING METEROLOGICAL VARIABLES

2017 ◽  
Author(s):  
IGNACIO J. TURIAS ◽  
JOSÉ M. JEREZ ◽  
LEONARDO FRANCO ◽  
HÉCTOR MESA ◽  
JUAN J. RUIZ-AGUILAR ◽  
...  
Keyword(s):  
Carbon Monoxide ◽  
Atmospheric Pollution ◽  
Pollution Concentrations

scholarly journals Studying the recurrent diagrams of carbon monoxide concentration at early ignitions in premises

2018 ◽  
Vol 3 (9 (93)) ◽  
pp. 34-40 ◽  
Author(s):  
Boris Pospelov ◽  
Vladimir Andronov ◽  
Evgenіy Rybka ◽  
Ruslan Meleshchenko ◽  
Pavlo Borodych
Keyword(s):  
Carbon Monoxide ◽  
Carbon Monoxide Concentration

Lung diffusing capacity: rebreathing method, applicability in nonuniform ventilation

1965 ◽  
Vol 20 (1) ◽  
pp. 99-102 ◽  
Author(s):  
P. S⊘lvsteen
Keyword(s):  
Carbon Monoxide ◽  
Nonuniform Distribution ◽  
Diffusing Capacity ◽  
Carbon Monoxide Concentration ◽  
Straight Line ◽  
Co Concentration ◽  
Concentration Changes ◽  
Rectilinear Section ◽  
Rebreathing Method

We have calculated how the carbon monoxide concentration changes when subjects with different distributions of ventilation and lung diffusing capacity (Dl) respire in a small bag. The curve [loge CO concentration in the bag] versus [time] will sooner or later appear as a straight line. Dl is calculated from the slope of the rectilinear section of the curve and from lung and bag volume. If the curve becomes rectilinear within the period considered, Dl is calculated too low. In some cases the curve will not be rectilinear until more than 45 sec have passed, but will appear to be rectilinear during the period from 30 to 45 sec. If such an experiment is discontinued when 45 sec (the usual duration of experiment) have passed, Dl can be calculated at too high, at correct, or at too low values. nonuniform distribution of lung diffusing capacity Submitted on February 18, 1964

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