Zakirullin R.S., Odenbakh I.A.
OPTIMIZATION OF SMART-WINDOW PARAMETERS WITH THE ACCOUNT OF GEOGRAPHICAL COORDINATES OF A BUILDING ^{[№ 9 ' 2017]}
The results of calculation of the optimal angle of inclination of the filter gratings on the smart windows with angular selective light transmission at double glazing, a constant azimuth of the orientation of the windows to the cardinal, for different geographical latitudes with the same longitude of a building are presented. For comparison, the calculations are made for the middle of the hottest period of the year and the day with maximum solar radiation. Calculations have also been made for cities located in different hemispheres and having not only different latitudes but also longitudes. Angular selectivity of light transmission of a smart window is achieved by using in a window structure an optical filter with two inclined surface gratings consisting of absorbing, reflecting or scattering parallel strips. The possibility of angular selective filtering of direct solar radiation is shown taking into account the geographic coordinates of the building, the solar trajectory, the seasonal and daily distribution of solar radiation intensity. Smart windows with optical filters are designed to provide hygienic requirements for natural and artificial illumination and insolation, given in Sanitary and Epidemiological Regulations and Standards SanPiN 2.1.2.2645-10 “Sanitary and Epidemiological Requirements for Living Conditions in Residential Buildings and Premises”.

Zakirullin R.S.
A METHOD FOR OPTIMIZED ANGULAR SELECTIVE FILTERING SOLAR RADIATION ^{[№ 8 ' 2017]}
A method for optimizing the angular selective regulation of the light transmission of a window using an optical filter with two inclined surface gratings consisting of absorbing, reflecting or scattering parallel strips is presented. The possibility of angular selective filtering the direct solar radiation taking into account the geographic coordinates of the building, the solar trajectory, the seasonal and daily distribution of the solar radiation intensity, and the azimuth of orientation of the window to the cardinal due to the optimal angle of inclination of the filter gratings on the window pane is shown. Windows with optical filters are designed to provide hygienic requirements for natural and artificial illumination and insolation, given in Sanitary and Epidemiological Regulations and Standards SanPiN 2.1.2.2645-10 “Sanitary and Epidemiological Requirements for Living Conditions in Residential Buildings and Premises”.

Zakirullin R.S.
A METHOD FOR CALCULATING THE GRATING OPTICAL FILTER FOR SMART WINDOWS ^{[№ 7 ' 2017]}
A method for calculating an optical filter with thin-film grating layers on two surfaces of a smart window with single and double glazings is presented. Surface gratings are formed by absorbing, reflecting or scattering parallel strips of chromogenic or other smart materials, alternating with directionally transmissive stripes with the untreated part of the raw glass surface. The design of the filter and the difference in the calculation of the angular selective characteristic of the directional light transmission and the geometric parameters of the filter for single and double glazed windows are considered. Calculation of the filter for a double glazed window with given light transmittance characteristic at a known latitude of the settlement and azimuth of orientation of the window to cardinal is given. The results of the calculation are confirmed experimentally. Smart windows with optical filters are designed to provide hygienic requirements for natural and artificial illumination and insolation, given in Sanitary and Epidemiological Regulations and Standards SanPiN 2.1.2.2645-10 “Sanitary and Epidemiological Requirements for Living Conditions in Residential Buildings and Premises”.

Zakirullin R.S., Letuta S.N.
GRATING OPTICAL FILTER WITH ANGULAR SELECTIVE LIGHT TRANSMISSION ^{[№ 1 ' 2015]}
An optical filter with thin-film grating layers on both surfaces of the transparent sheet substrate is presented. Relative position of the gratings with alternating transmissive and absorptive strips provides angular selectivity of light transmission. Influence of parameters of plane-parallel and coaxial-cylindrical filters on results of regulation of the directional light transmission are set by a graphic-analytical calculation method.

Zakirullin R.S.
AN OPTICAL FILTER WITH ANGULAR SELECTIVITY OF LIGHT TRANSMISSION ^{[№ 9 ' 2013]}
An optical filter consisting of glass substrate with thin-film grating layers on two surfaces is presented. Macroscopic gratings are formed by directionally transmissive strips alternating with absorptive strips. Their relative position on input and output surfaces provides angular selectivity of light transmission — part of the radiation that has passed through input gratings is blocked additionally by output gratings depending on incidence angle. A graphic-analytical calculation method determines the influence of optical and geometric parameters of alternating strips on angular characteristics of light transmission. Results of graphic-analytical calculations are confirmed experimentally. A method of calculation of the filter parameters to meet the predetermined angular selective regulation characteristics is developed. Architectural glazing to control the transmitted solar radiation without special redirecting devices is the most promising area of application.

Zakirullin R.S.
A CALCULATION OF CHARACTERISTICS OF THE ANGULAR SELECTIVE REGULATION OF LIGHT TRANSMISSION OF AN OPTICAL FILTER ^{[№ 9 ' 2012]}
A method for angular selective regulation of directional light transmission of a grating optical filter is presented. The possibility of adapting to a change in the incidence angles of light beams when moving the light source and glazed objects relative to each other is shown. A graphic-analytical calculation of the characteristics of regulation at different parameters of the filter gratings is given.

Zakirullin R.S.
SELECTIVE REGULATION OF LIGHT TRANSMISSION GLASS AND GLAZING CONSTRUCTIONS ^{[№ 6 ' 2011]}
The modern methods of selective regulation of directional light transmission of glass and glazing constructions, depending on the angle of light rays are regarded in this work, sciences and technologies, where there are unresolved problems, are distinguished. The author carried out relevant researches on the interim results of which international application was filed on the invention.

Zakirullin R.S.
APPROXIMATION OF DEPENDENCE OF AIR SPECIFIC HUMIDITY FROM TEMPERATURES OF DRY AND WET THERMOMETERS AT RECIRCULATING CONVECTION DRYING ^{[№ 10 ' 2005]}
Are received The approximate dependences of air specific humidity from temperatures of dry and wet thermometers in real ranges of their change at convection drying with recirculating of the drying agent. Nonlinear dependence between these parameters is approximated by a method of regressive analysis of their values under the id-diagram of damp air in vicinities of the basic characteristic points of drying process.

Zakirullin R.C.
DRYING AGENT THERMAL CAPACITY CALCULATION IN RECYCLING CONVECTION DRYING ^{[№ 7 ' 2004]}
Average magnitudes of drying agent isobaric specific heat in practical ranges of temperature change and air-steam mixture moisture load in convection recycling drying have been calculated. Certain fractional accuracies of actual thermal capacity change for average magnitudes in corresponding ranges are situated in acceptable bounds. Application of average thermal capacities allows to decrease orders of nonlinear equation which describe heat-mass exchange process in drying.