The Design Of Multi-energy Complementary Heating/Cooling System In Guanzhong Area

The Guanzhong Area is the best economic development area and important industrial base in Shaanxi province.With the increasingly serious fog and haze pollution in winter,exploring the causes of fog and haze has also become an important measure to solve the important problems of environmental pollution of cities in Guanzhong Area such as Xi ’an city.Based on numerous studies,it is found that among the causes of fog and haze,the emission of pollutants such as coal burning is the main culprit of fog and haze.For the energy development aspect,the government of Shaanxi province has another choice during the planning of geothermal development in the 13 th Five-Year Plan period,which is,a single energy source cannot solve the problem effectively,the theory of multi-energy complementation plays a great role in improving the energy structure of Shaanxi Province.In this paper,the development of geothermal energy and municipal waste disposal in Guanzhong Area are taken as the objects.Analyzed with the advantages and disadvantages of geothermal energy and biogas,the theory that geothermal energy and biogas energy are complementary to each other are further put forward,and a multi-energy complementary heating/cooling system is designed.Taking the heating problem of Guanzhong Area in winter as the main object for demonstration,Zijin Chang ’an Community is selected as the research object,ANSYS-Fluent software is used for simulation analysis to verify the feasibility of the system in Guanzhong Area.Compared with the the advantages of the heating mode and the traditional refrigeration mode,traditional supply multi-energy complementary heating/cooling system is discussed in this paper.In terms of theory,this paper introduces soil temperature field,soil heat transfer theory,geological conditions,biogas generation theory and other basic theoretical knowledge in Guanzhong Area.At the same time,this paper tries to establish a mathematical model of soil heat transfer around the biogas digester,and manage to confirm the condition of the border.In the aspect of analysis and calculation,the system is designed and analyzed,the volume of the pool is optimized,the theoretical gas production and the heat load of the heated biogas digester and the heating area are calculated to determine the operating conditions of the system.In the matter of stimulation system,ANSYS-Fluent software is used to analyze the temperature field in the model,which the simulation results are confirmed.The system is evaluated and optimized based on the heat dissipation and temperature field in the digester.Finally,in the contrast of the traditional heating and cooling methods,the advantages of the multi-energy complementary heating/cooling system are obtained,which authenticate the feasibility and value of this system.