Thermophysical aspects of the use of renewable energy resources for power supply of buildings under the climatic conditions of Mongolia

Currently, the energy sector, including municipal energy, consumes a significant amount of primary and renewable energy resources. As a result, it is a significant source of the release of the corresponding amount of greenhouse gases and low-potential thermal emissions into the environment. This aspect of the negative impact of public energy will continue until we change the general and methodological approach to the problems of energy supply to buildings and household facilities and energy supply in general. One of the new approaches in this case can be called the use for these purposes of ubiquitous renewable energy resources, such as solar energy, its derivative - wind energy and other types of low-potential thermal energies of the environment. This approach, in general, is not new, but nevertheless there are a number of problems associated with their energy intensity, the principle and method of transformation and the scale of application. This paper touches upon some natural-climatic, energy and thermophysical aspects of the problems on the example of Mongolia, gives brief characteristics of the sharply continental climatic conditions of Mongolia, solar and geothermal energy resources. The energy and thermophysical aspects of the use of renewable energy resources in a cold climate and a map of the zoning of the territory of Mongolia according to the “degree-day” of heating and the results of some computational and experimental studies on the use of solar and geothermal heating of buildings are presented. In order to assess the efficiency of solar and geothermal heat supply, the report puts forward the ratio of the number of degree-days of heating and the arrival of total solar radiation per year for a given area as an indicator. In accordance with the zoning map of the territory of Mongolia, according to the efficiency of the use of solar heating of buildings, four zones are identified.