Research On The Measurement And Evaluation Of Biogas Heating Technology In Villages And Towns

As a kind of clean and renewable energy,biomass energy is rich in resources and has great development potential in rural areas of China.With the rapid development of China’s rural energy and the acceleration of the pace of building a modern rural energy system,people have a certain foundation for the research and utilization of biomass energy,but also exposed some problems in the construction and development of biomass energy in rural areas,especially the lack of measurement and evaluation of typical projects,can not accurately predict the applicability and feasibility of biomass heating in rural areas,so this paper starts research on this.Firstly,combined with the characteristics and influencing factors of the application of biogas heating in rural areas,this paper selects 16 indicators from the five aspects of technical characteristics,economic benefits,environmental benefits,social affordability and suitability of raw material conditions to evaluate rural building biogas heating,and establishes a set of evaluation index system of rural building biogas heating AHP fuzzy comprehensive evaluation method is used to evaluate the biogas heating of rural buildings.Then,according to the steps of AHP,the weights of five indexes are determined,among which the weights of technical characteristics,economic benefits,environmental benefits,social affordability and raw material conditionality are 0.087,0.303,0.043,0.45 and 0.117 respectively;finally,the evaluation index system evaluation table of village and town building biogas heating is established,and the fuzzy comprehensive evaluation method is used to evaluate the biogas heating for rural buildings scientifically and reasonably.Based on the evaluation index system,this paper evaluates a demonstration household of biogas heating in Xuzhou.First,the field test is carried out,and the indoor heating effect and economy of biogas heating system are analyzed according to the test results.Then use De ST to simulate the energy consumption of the house,and calculate the hourly heat load and energy consumption data.The economic and environmental benefits of biogas heating system and traditional coal-fired and natural gas heating system are analyzed by comparing with the simulation results.The results show that:compared with coal-fired heating,the initial investment and operation cost of biogas heating are relatively high,but the environmental benefits are considerable;Based on the analysis of the economic and environmental benefits of biogas and coal-fired heating,this paper compares biogas heating with natural gas heating.The results show that: the initial investment and the operation cost of biogas heating is more than that of coal-fired heating,and the operation cost is about 1.4 times of that of coal-fired heating,and the economy of biogas heating needs to be further improved,but the environmental benefits of biogas heating are considerable,with the emission reduction of carbon dioxide 2190 kg,sulfur dioxide 17.73 kg,nitrogen oxide 1.29 kg and dust 8.87 kg in the whole heating season;Compared with natural gas heating,biogas heating has little difference in heating cost when the heat load is low.For rural areas with abundant biogas production,biogas heating should be selected according to local conditions to reduce the pressure of natural gas.Finally,the evaluation index system is applied to evaluate the biogas heating project,and the final evaluation grade of the project is poor.