The article presents a comparative analysis of dust pollution of atmospheric air of Volgograd and the city of Kabul. Given the dynamics of changes in the concentration of fine dust in the course of the year for these cities, and also investigated the characteristics of the concentration distribution

Keywords: air, fine dust, PM10, PM2,5, concentrations, meteorological parameters, normal distribution, logarithmic-normal distribution law

The article deals with Justification for the design of protective clothing against cold, the main means of calculation and design assessment which is mathematical modeling. Justification of pilot studies of influence of parameters of a matrix of fixing of the special soft polymeric edges forming the additional locally concentrated rigidity of external material of the warmed clothes of a special purpose is presented in article. Technical characteristics and standard restrictions for the textile material considered at the heart of the projected product taking into account the requirement of GOST and operational criteria are given. Data on modern ways of increase in resistance of an external cover of clothes to the deforming influences for the purpose of preservation of internal volume and, as a result, necessary thermal insulation of clothes are submitted. On the basis of established experimentally dependences of rigidity of the modified material on width and thickness of polymeric channels the way identification of extreme density of filling of polymers of the internal surface of integumentary material with it taking into account the requirement of hygienic and operational character is offered.

Keywords: heat-shielding clothes, design, modeling, physical-biological characteristics of a person, clothes in water, cooling of the person

The article is devoted to the problem of determining the air flow through cracks in the enclosing structures using numerical methods. Based on the study of the data obtained during the visual inspection, it was found that most of the apartment buildings have significant physical wear, which is mainly characterized by the presence of cracks. Particular attention is paid to the assumptions made for the design scheme. On the basis of the equations of dynamics and continuity, a mathematical model is obtained that allows one to predict the airflow through the crack

Keywords: physical wear, air mass flow rate, crack, permeation, water steam, heat and mass transfer, controlled environment, visual examination, air change, air permeance, numerical methods

With the aim of obtaining objective data about the energy potential of the air flow in the ventilation system proposed to use the parameter "local mechanical power flow". The formulas describing the change of this parameter in different parts of the ventilation system. Describes the author's method of graphic representation of the processes of change of flow parameters in the coordinate axes L - Pn, allowing enough just to determine the change in local mechanical power on isothermal and non-isothermal sections of the ventilation system.

Keywords: ventilation system, fan, mechanical power, heat exchanger, energy efficiency, energy conservation

The article presents the results of studies conducted by the national agency of Afghanistan on ecology and environmental protection and Russian authors of studies on the assessment of air pollution in the city of Kabul. An analysis was carried out for the formation of information on the state of air quality in the city of Kabul, when considering its street-road network as a source of chemical pollution of the air environment. A mathematical model of the dependence of the concentration of fine dust (PM10) on three factors: the speed of wind, humidity and temperature in the winter months of the city of Kabul.

Keywords: Air quality, dust, fine particles, moisture, wind speed, multiple regression coefficient, Fisher criterion

Drying module is a part of any modern gas analysing device. Using the Peltier elements for cooling the gas probe in druying module is a known technical solution. Peltier elements are very energy-intensive things. So the task of calculation of amount of electrical energy which is needed for predetermined temperature decline of gas probe is very topical. The solution of this task is given in the article. With formulas for partial pressure of vapour we can calculate the humidity of gas at the output of drying module. Then we can find the temperature of gas. Finally using the heat balance equation and nomogramms we can calculate the voltage for Peltier element.

Keywords: Peltier element, gas probe, drying process, gas analyzer, heat balance, partial pressure of vapour

The article is devoted to the calculation and assessment of background pollution of the atmosphere srednebalansovogo integral criterion for the studied regions of Volgograd for the years 2010-2013. Assessing the background air pollution, and creating a map of alternative sites for new industrial construction, is determined srednebalansovy integral criterion of pollution of the atmosphere of the study area. This requires calculation of the average concentration of harmful substances in each group summation of polluting the area. The data obtained were built integral and differential distribution function srednebalansovogo integral criterion of atmospheric pollution for Volgograd regions. According to the analysis the greatest volume of air pollution falls on Central and Traktorozavodskiy districts, which corresponds to the results of the calculations of the specific pollution load on the atmosphere of the city.

Keywords: biospheric compatibility, balance method, the biosphere, the technosphere, the atmosphere, the average balance integral criterion

In the article discusses the features of work air handling unit (AHU) based on spray chamber (SC), developed the design of the test bench and presents the results of the tests SC, identify ways to improve them, particularly in the lower part of the workspace was placed plane-parallel packing. It was established experimentally that the efficiency of processes of heat and moisture transfer increased by an average of 6 - 10%.

Keywords: air handling unit, spray chamber , heat and mass transfer, efficiency

The results of analysis of regulatory requirements for dust collection systems based on existing environmental legislation. Development of systems for dust collection and dust extractor is using the tools of quality management. It has established a set of basic technical requirements for systems of dust removal and their parts taking into account modern requirements for energy efficiency.

Keywords: ecology, environmental regulations, dust collection, air quality management, dust collectors, energy efficiency

The sorption capacity of some types of dust in the production of building materials, structures and products. For example, cement and wood dust being suspended in the air of the working area or in the air, absorbs substances higher hazard class.

Keywords: cement dust, wood dust, sorption capacity, fractional composition, hazard class

The article studies the method of the distant measurement of the concentration and the disperse content of the dust in the air of living and working areas in the real time mode. The use of the laser sounding as a highly precise method of measurement and air quality control is based. The results of the implemented research are displayed. The device that was used for the studies of the concentration of the disperse dust content is analyzed. Its use for the control of the air quality of the city atmosphere is based.

Keywords: dust, suspended solids, concentrations, disperse content, working zone, living zone, laser sounding, safe working conditions, ecological monitoring, optical method

One of the most important systems for ensuring the required air quality in Orthodox churches is the ventilation system. Mechanical ventilation is getting contaminated during operation. The air, passing through the air ducts, contains dust particles, including pathogenic bacteria. To prevent bacteria from multiplying in the ventilation system, bactericidal filters must be used. Halls of Orthodox churches belong to public buildings with a large crowd of people with a long stay. Such premises require a bactericidal efficiency of at least 90%. For the ventilation systems of the church of St. Theophan the Recluse, the authors proposed and implemented a device for bactericidal air treatment using ultraviolet radiation. The bactericidal effectiveness of this device was 92%, which is higher than required. The authors recommend using the proposed device for public buildings.

Keywords: Orthodox church, church buildings, ventilation of religious buildings, bactericidal treatment of air, ultraviolet radiation, air disinfection, bactericidal effectiveness

In article the sections method offered by professor Azarov V. N. for assessment of fractional composition of the dust arriving on air Wednesday is considered. Application of this method when processing results of the dispersive analysis of cement dust is described.

Keywords: dust, pass function, fraction, diameter of a section, probabilistic corridor of distribution

In article the analysis of technological processes of repair construction works as sources of formation of fine dust is carried out. Results of pilot studies according to fractional composition and concentration of dust in urban air environment around carrying out such works are given

Keywords: dust, dust emissions, concentration, fractional structure, fine particles

Results of the researches on assessment of pollution of urban air environment conducted by foreign and Russian authors by fine dust of a natural origin are given in article

Keywords: quality of air, dust, fine particles, natural origin, atmosphere