The selection of buildings for refurbishment is a multi-objective problem and it should be based on integrated assessment of the current performance of the buildings. Accurate assessment allows the development of strategies for the optimisation of building performance and the selection of appropriate and most efficient refurbishment measures. This paper presents a computer-based integrated building performance assessment methodology based on the multiple-criteria approach. A case study from the Šiauliai district, Lithuania, illustrates the proposed methodology in use. The assessment results indicate what are the worst performing buildings and help with the selection of appropriate refurbishment measures and estimation of possible outcomes.

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The prospect of use of fuel in the form of micro particles (balls with a diameter about a millimeter formed by the fissile material and a protective cover to hold the radioactive fission products) in nuclear reactors is disclosed. It’s marked that flow ability, large specific surface of heat removal, extraordinary high resistance of micro fuel particles allow to design innovative safe reactors for various purpose: transportable, breeders, high-temperature, high neutron flux etc. It’s suggested to complete the active zone by bulk heat releasing assemblies. In them the advantages of spherical micro fuel particles and a coolant side supply to the bed through permeable distribution and branch channels are harmoniously combined in these assembles. It is presented the scheme of bulk assemblies and carried out the analysis of modeling of dynamics of a stream in permeable channels. It is shown that the mathematical description of liquid movement in such channels has ambiguity and discrepancy. To eliminate modeling shortcomings a new kinematic image of current in the permeable channels was offered. It was proposed instead of the existing one representing a jet to which particles of coolant were continuously joined or separated on the permeable wall. In the new interpretation the flow in the permeable channel is considered as turn of the stream at its simultaneous expansion or narrowing depending on there is outflow or inflow. On the base of this image the equation for determination of coolant pressure changing in the permeable channel is obtained; reaction of a stream for changing of flow rate increment is established, the tangent component of a velocity on a permeable wall is founded. Thereby the disadvantages of describing of coolant moving in the bulk assembles channels are eliminated. Permeable channels are used not only in nuclear reactors, but also in many other technological devices: catalytic reactors, heat exchangers, filters, collector and distributing systems. The obtained results can be used for designing other devices with permeable channels.

The influence of superfine carbon additives and their pretreatment by ultrasonication on the properties of elastomer compositions has been investigated. Superfine carbon additives come in two different types: fullerene-containing additives and ultra fine carbon additives (a complex mixture of nanofibers and nanotubes, graphite and amorphous carbon particles). Mooney viscosity, parameters of relaxation and vulcanization kinetics of rubber mixtures, tensile strength, elongation at break and resistance to thermal aging, abrasion resistance and compression of filled rubbers based on butadiene-acrylonitrile were carried out. Except for the identified characteristics, crosslink parameters by the method of equilibrium swelling were determined. It was found that the introduction of the ultrasonically pretreated, superfine carbon additives to elastomeric compositions based on butadiene-acrylonitrile rubber led to rubber with improved thermo-oxidative and wear resistance in comparison to rubbers containing untreated additives.

Statistical series of economic and energy indicators had been made up according to 2017 data. It consisted of three comparable values: population and specific (capita per inhabitant in the year) gross value added (SGVA) and electricity consumption (SEC) for fifty countries, which SGVA are larger or comparable to Belarus values. Using the correlation analysis the presence of strong, positive, reliable relationship between SGVA and SEC was established. It was found, that for the innovative development of Belarusian economy and accelerated growth of SGVA, the installed electric capacities are necessary to increase by 20–25 %. It is pointed that nuclear energy is the main resource of the fifth technological setup. The solving tasks during atomic stations operation promote development of new technology, emergence and insure advanced production methods in various economy sections. It is offered to create microclimate, required by modern technologies, in working zones of plants and at workplaces in institutions by an automated system ASLOTU – the radiant system of insuring technological conditions, which had been created by Belarusian specialists. The structurer of this infrared system, principles of its calculation and specific functioning algorithm are given. The ASLOTU technical and economic indicators have been determined – cost, service life, labor intensity and frequency of maintenance, costs of fuel consumed, period of covering capital outlays. The marked indicators are the result of processing the operation data of ASLOTU, which were implemented in Belarus for the period 1997 to 2007. They formed the basis of the draft ASLOTU introduction plan until 2035. The main planned indicators are given. The results can be used in other countries in which SGVA is 4.0–15.0 thousand dollars per person and they took course toward innovative development of the economy.