The article deals with the issues of assessing the effectiveness of the construction and operation of metal corrugated pipes. The characteristic features and difficulties of the operation of corrugated metal culverts in areas of permafrost distribution are revealed. The characteristics of the main defects of culverts are systematized. The features of thermophysical calculations of metal corrugated pipes on a frozen base are analyzed in detail. Recommendations are given on the application of the most effective technical solutions in the construction of corrugated metal culverts on permafrost soils.
Keywords: highway, culverts, metal corrugated pipes, thermal conductivity, permafrost soils
At present an important role in solving energy conservation problem is assigned to thermal pumping plants (TPP). Using processes of evaporation and condensation of easily boiling liquid circulating in the system they extract low potential heat from environmental objects and provide heat supply for buildings, constructions, greenhousee and so on. Artificial sources of low potential heat for TPP of different capacity can be, for instance, ventilation air and exhaust gases, circulating and waste water,ground. Energy efficient reasonability of TPP use in the system of water disposal for the town of Novocherkassk in Rostov region is considered. Calculations indicate that there is a technical potential to replace a boiler house operating on expensive gas fuel and emissing into the atmospere more than 850 t of carbon dioxide - greenhouse gas - with ecologically clean TPP, one of which uses heat of waste water and the other - heat of ground.
Keywords: thermal pumping plant, renewable sources, energy conservation, evaporation, condensation, waste water, ground
The article considers the essence and specifics of state regulation of local markets in the region. With respect to implementing the principles of sustainable development highlights the key tasks of state regulation in the process of formation and development of local markets, determine the forms and methods of state regulation.
Keywords: region; regional economy; sustainable development; local markets; trends
Information about authors of issue №4 (2011)
Keywords: authors