This paper addresses an empirical method of assessment of the height of a virtual point source. In order to achieve such assessment, three planes defining the location of a virtual point source in a space are created and formulas describing the geometry of observer's sight and plume orientation are used. Data for calculations are obtained on a basis of plume photographs. The final position of a virtual emission point is described by a set of its coordinates in the Cartesian coordinate system. Presented method may be applied as a means to verify and validate the existing formulas describing the rise of plume above the stack exit or as a tool enabling acquisition of information for the sake of creating new formulas of this type. The calculation of the location of a virtual point source ascribed to the point emission from the roof of the bank of coke oven is presented and illustrated with photographs which reveal position of plume, adequate planes, axes and characteristic objects.

The article presents the legal framework of periodic control systems of individual heating devices in the Federal Republic of Germany, the Czech Republic and Switzerland. The scope of periodic inspections carried out in considered countries, the persons responsible for performing them, the method of data acquisition and administrative bodies responsible for supervising the fulfillment of the obligation, as well as the sanctions for law violations related to small heat sources operation in the residential sector were discussed.

Gaussian plume models are still used in cases where short-distance, routine calculations have to be done. They use universal parameters to parameterise the atmospheric-and earth-surface impact on the dispersion of air pollutants that can produce satisfactory results in overall conditions. This is not the case in the place-specific applications, when standard models do not reflect all of the mechanisms involved in local dispersion phenomena. This limitation applies in particular to atypical objects which are characterised by high thermal and mechanical turbulence being introduced into the air. Such places form locally distinctive air turbulence reflected by specific vertical wind speed profiles. Based on the knowledge of their shape, the turbulence and diffusion intensity information may be transferred to the propagation model. The analysis of the wind profiles measured in the vicinity of the big coking plant is presented in this paper. The wind profiles' exponent values which had been obtained on this basis were compared with the values used with standard models. Also, measured marker-gas concentrations have been related to values calculated with the use of the model equipped with modified exponents as well as to the values obtained from the traditional model.

Abstract. The results of industrial research on co-combustion of solid recovered fuel (SRF) with hard coal in a stoker boiler type WR-25 has been presented. The share of SRF in the fuel mixture was 10%. During the co-combustion of SRF, no technological disturbances or significant reduction in energy efficiency of the boiler were noted. Obtained SO2, NOx and CO emissions were comparable with coal combustion but dust emissions increased. During combustion of the coal mixture with a 10% share of SRF in the test boiler WR-25, the emission standards established for the combustion of the dedicated fuel were met. However, comparison of obtained emission results with the emission standards established for co-incineration of waste, revealed the exceedance of permissible levels of HCl, dust, heavy metals, dioxins and furans. Additionally, the residence time of flue gases in over 850 o C conditions for the test boiler WR-25 was too short (1.3 seconds) in refer to the legislative requirements (2 seconds) for the thermal conversion of waste.

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