Analysis On The Technological,Economic And Environmental Effects Of Coal Transformation In Rural Areas Of Beijing

In order to meet the country’s call for clean heating in rural areas of Beijing,effic ient and environmentally fr iendly coal-to-electricity(gas)technology is widely used.Common coal-to-electricity(gas)heating modes include low-temperature air source heat pump,thermal storage boiler and small gas stove.Cryogenic air source heat pump is a new type of heat pump,but there are still many doubts.Because of the way of energy consumption,low temperature air source heat pump and thermal storage boiler consume electricity.At present,thermal power still accounts for more than 70% in China and most developed countries.In addition,unlike developed countries,China is a "coal-based" energy structure,with a relative shortage of natural gas.In some industrial production,the advantages of natural gas can not be replaced.On the one hand,at the cost of "three portions of coal produce one portion of oil",coal-based oil and coal-based gas are developed in coal-producing areas.On the other hand,precious natural gas is simply burned down and "one portion of gas replaces one portion of coal".Therefore,the use of high-grade natural gas heating also has many doubts.This research takes the old small coal-fired stove heating system and the new coal-to-electricity(gas)heating system in rural areas of Beijing as the research object.Through the establishment of the first-level energy consumption mathematical model of each system and the simulation of the whole heating season heat load results of typical residential buildings in rural areas of Beijing by DeST software.A calculation of energy consumption,emissions of atmospheric pollutants such as carbon dioxide,sulfur dioxide and nitrogen oxides is carried out for environmental effect analysis and technical benefit analysis.At the same time,economic benefits such as initial investment and annual operation cost are calculated to evaluate the return cycle of new investment added to coal-to-electricity(gas)system.It can not only get comprehensive evaluation of technology,environmental protection and economy,but also provide guidance for users to choose new heating schemes.Through the research and analysis of three dimensions,the low temperature air source heat pump heating system is outstanding in energy consumption,operating costs,investment return cycle and other aspects,which has great comprehensive advantages.The advantages of gas wall-mounted furnace heating system are mainly manifested in its low emission of atmospheric pollutants and other environmental benefits.In addition,the technology,environmental protection and economic benefits are quantitatively analyzed and embodied through the simulation calculation and the mathematical model established,which can update the concept of users more directly and provide an important basis for users to choose new heating schemes.