An important direction in the development of energy saving policy is harvesting and conversion into electricity of low-grade waste heat. The present paper is devoted to the improvement of the efficiency of thermo-electrochemical cells based on carbon fiber electrodes and potassium ferri-/ferrocyanide redox electrolyte. The influence of the carbon fiber electrode surface modification (magnetron deposition of silver and titanium or infiltration implantation of nanoscale titanium oxide) on the output power and parameters of the impedance equivalent scheme of a thermo-electrochemical cell has been studied. Two kinds of cell designs (a conventional electrochemical cell with a salt bridge and a coin cell-type body) were investigated. It was found that the nature of the surface modification of electrodes can change the internal resistance of the cell by three orders of magnitude. The dependence of the equivalent scheme parameters and output power density of the thermoelectric cell on the type of electrode materials was presented. It was observed that the maximum power for carbon fiber modified with titanium metal and titanium oxide was 25.2 mW/m2 and the efficiency was 1.37%.

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Abstract. The research is directed to the development of a model for the "smart city" including an interior space with the developed system of information technologies to provide comfortability in the area of living environment and the natural external envelope forming a hurdle from negative natural and climatic phenomena. Some new landscape solutions are given that increase the potential of energy saving technologies in the city when later transforming it into the Smart city. The history of building the green belt around Stalingrad-Volgograd is analyzed, directions of the ecological type of their impact on the urban living quality are settled. New landscape solutions are presented increasing the potential of energy saving technologies of the city. The research embrace the theoretical principles of forming the landscape building objects in the concept of the Smart city. The article justifies the need for enlarging the landscape building techniques in terms of enhancing the energy efficiency of buildings as well as forming the territorial platform to transform the city into the "Smart city" region. The developed methodology of the landscape object building enables to apply the obtained proposals in the Russian and world construction under similar natural conditions when developing the city into the Smart city sphere.

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Abstract. Urban planning is a critical issue in urban planning around the world. Real monitoring of landscape and environmental processes, urban planning and sustainable development designers associate with the construction of virtual models. The aim of the study is to develop methodological approaches to planning in the field of landscape and environmental sustainability taking into account the landscape features of the city of Volgograd and the formation of a topographic basis of a virtual model aimed at resolving environmental, social and figurative problems of the city. The construction of the landscape object of the Green ring in the suburban area of Volgograd and the environmental impact of the water surfaces of the Volga river on the sustainable development of the comfortable spaces of the city were analyzed. The modeling for the integration of a system of natural components of the landscape based on the climate aspect and the specifics of the topography in the virtual model of landscape ecological sustainable development the water-green landscapeology. The results of the study reveal the scientific and methodological provisions of urban planning and establish practical goals and implementation of virtual models aimed at preserving the true image of the city