摘要
该研究旨在探索如何利用太阳能增温系统促进沼气生产,研究对象为一个容积为100m3的沼气发酵装置,该沼气装置位于陕西省淳化县润镇中学,用于处理该校公厕粪污。陕西省淳化县润镇1月的平均气温为-1.6℃,最低气温达-15℃,平均太阳辐射为4.5kwh/m2,没有加热系统的沼气池在冬季基本停止产气,为解决这一问题,在润镇中学配套建设了由120m2的日光温室和总面积为20m2的热管太阳能集热器组成的太阳能增温系统,并配合使用电加热系统。在冬季,此太阳能系统每天可促进沼气发酵装置多生产12m3沼气,产出的沼气可输送到学校厨房,具有较好的经济效益。此外,设计了带有自动跟踪系统的抛物面太阳能聚光器(PTC)和日光温室组合系统为沼气发酵装置增温,以期得到更好的增温效果和更高的沼气产量。
This study focuses on using solar energy to enhance biogas production.In this research one digester under the ground was used as study object,which is located at Runzhen middle school in Chunhua county,Shannxi province,and its volume is100 m3.The raw material was human manure,which was fed to the system every day.The average temperature in January was-1.6oC,the lowest temperature was -15oC and the average of solar radiation in Runzhen area was 4.5 kwh/m2.Because in thewinter the biogas yield without heating system will almost stop,the objective of this study is to investigate the feasibility of usingsolar energy for increasing biogas production.The system includes a 120 m2 greenhouse and 8 flat solar thermotube heaters with total surface area of 20 m2 to reach optimum temperature.Results show that in the winter the solar system can increase biogasyield by 12 m3 per day with cost 1.5 Yuan/m3,all the gas yield can be used in school kitchen by the designed pipe for cooking.Inaddition,the parabolic trough solar concentrator （PTC） with tracking system was developed for the heating system,which is expected for higher gas production per day without daily additional cost.
出处
《农业工程学报》
EI
CAS
CSCD
北大核心
2011年第6期256-261,共6页
Transactions of the Chinese Society of Agricultural Engineering
基金
rural biogas national key technology R&D pilot program, rural biogas technology innovation and model base in Northwest,(ministry of agriculture, department of development and planning letter 2010-120) national key technology R&D program, optimization and standardization of biogas project (2007BAK31B01)
