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Moscow, Russia

Vasilyev G.P.,JSC NIIMosstroy | Leskov V.A.,JSC NIIMosstroy | Mitrofanova N.V.,JSC NIIMosstroy | Gornov V.F.,JSC NIIMosstroy | Kolesova M.V.,JSC INSOLAR ENERGO
ARPN Journal of Engineering and Applied Sciences

A new concept for snow removing from Moscow streets in wintertime that proposes development of the "distributed snow melting system" (DSMS) in the city is represented in this Article. The basic element for a suggested DSMS is a near-house heat pump snow melting site of 10÷15 m2 using renewable energy sources (RES). In addition, DSMS can include heat pump snow melting systems for heating pavement at transport stops and in public places, and also specialized heat pump snow melting systems for snow, removed from city highways. Use of ambient air as a heat source for heat pumps snow melting system and results of the trial operation of experimental snow melting facility under Moscow climatic conditions are given. © 2006-2015 Asian Research Publishing Network (ARPN). Source

Vasilyev G.P.,JSC NIIMosstroy | Leskov V.A.,JSC NIIMosstroy | Mitrofanova N.V.,JSC NIIMosstroy | Kolesova M.V.,JSC INSOLAR ENERGO | Burmistrov A.A.,JSC INSOLAR ENERGO
MATEC Web of Conferences

The article has shown the results of experimental researches of the snow-melt on a heated platform-near building heat-pump snow-melt platform. The near-building (yard) heat pump platforms for snow melt with the area up to 10-15 m2 are a basis of the new ideology of organization of the street cleaning of Moscow from snow in the winter period which supposes the creation in the megalopolis of the «distributed snow-melt system» (DSMS) using non-traditional energy sources. The results of natural experimental researches are presented for the estimation of efficiency of application in the climatic conditions of Moscow of heat pumps in the snow-melt systems. The researches were conducted on a model sample of the near-building heat-pump platform which uses the low-potential thermal energy ofatmospheric air. The conducted researches have confirmed experimentally in the natural conditions the possibility and efficiency of using of atmospheric air as a source of low-potential thermal energy for evaporation of the snow-melt heat pump systems in the climatic conditions of Moscow. The results of laboratory researches of snow-melt process on a heated horizontal platform are presented. The researches have revealed a considerable dependence of efficiency of the snow-melt process on its piling mode (form-building) and the organization of the process of its piling mode (form-building) and the organization of the process of its (snow mass) heat exchange with the surface of the heated platform. In the process of researches the effect of formation of an «ice dome» under the melting snow mass called by the fact that in case of the thickness of snow loaded on the platform more than 10 cm the water formed from the melting snow while the contact with the heating surface don't spread on it, but soaks into the snow, wets it due to capillary effect and freezes. The formation of «ice dome» leads to a sharp increase of snow-melt period and decreases the operating efficiency of the snow-melt platform as a whole. © Owned by the authors, published by EDP Sciences, 2016. Source

Vasilyev G.P.,JSC NIIMosstroy | Leskov V.A.,JSC NIIMosstroy | Mitrofanova N.V.,JSC NIIMosstroy | Gornov V.F.,JSC NIIMosstroy | And 3 more authors.
MATEC Web of Conferences

This article is dedicated to the study of the processes of formation and freezing of condensate in heat exchangers using ambientair heat and is prepared according to the results of experimental investigations. The aim of this work has been set to elaboratean energy-independent technical solution for protection of heat-exchange equipment against freezing the moisture condensed on the heat-exchange surfaces while using the low-potential heat of ambient air in heat pump systems. The investigations have shown that at the temperatures of ambient air close to 0°C when using the «traditional» way of defrostation, which means the reverse mode of operation of heat pump, an intensive formation of ice is observed at the bottom part of evaporator (if not provided with tray heater). This effect is provoked by downward flow of thawed waterand it'sfreezing in the lower part of the heat-exchanger due to the fact that the tray and housing of heat pump have a temperature below zero. Thereafter, while the defrostation mode has been periodically used, the ice coat would begoing to continue its growth,and by time significant area of evaporator could appear to be covered with ice.The results of the investigations presented in the article could be applied both to air-source heat pumps and to ventilation air heat recuperators. © Owned by the authors, published by EDP Sciences, 2016. Source

Vasilyev G.P.,JSC NIIMosstroy | Tabunshchikov I.A.,Moscow Architectural Institute State Academy | Brodach M.M.,Moscow Architectural Institute State Academy | Leskov V.A.,JSC NIIMosstroy | And 4 more authors.
Energy and Buildings

This article, written as a result of theoretical and practical research, describes a survey of condensate nucleation in heat exchangers utilizing low-potential heat of humid air. The authors conducted a series of studies aimed at developing energy-independent technical solutions to protect heat exchangers from the freezing of the moisture condensing on their exchange surfaces in the course of humid air heat recovery. There was a negative dependence of the thickness of the layer of condensate formed on the heat exchange surface, the condensation rate, and the moisture content of warm air. The article presents the outcomes of the numerical study aimed at building a model of the condensation processes that occur due to a flow of moist air when the air is cooled and heat is utilized. The study provided experimental validation for the consistency of the processes related to water vapor condensation in the flow of cooled moist air. The outcomes presented in the article can apply to both the exchange systems using the low potential heat of the atmospheric air, e.g.; for room heating or snow melting, and to the exhaust air energy recovery systems of the building ventilation plant. © 2015 Elsevier B.V. All rights reserved. Source

Vasilyev G.P.,JSC NIIMosstroy | Leskov V.A.,JSC NIIMosstroy | Gornov V.F.,JSC NIIMosstroy | Lichman V.A.,JSC INVEST | Kolesova M.V.,JSC Energo
MATEC Web of Conferences

This work describes the method of calculation of resistance referred to heat transfer of fencing in construction of an edifice with an example of a tree-layered ferroconcrete panel. In the limits of a final element program medium, a numerical modeling of stationary distributions of temperature fields and heat flows of panels of a type story of an apartment house have been conducted. On the basis of the results of numeral modeling the value of resistances to heat transfer and of the factors of termotechnical uniformity of panels are calculated. © Owned by the authors, published by EDP Sciences, 2016. Source

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