摘要
为了研究太阳照射对沼气工程发酵罐散热量的影响,文章以北京某沼气工程为例,建立了发酵罐散热的一维稳态模型,对散热进行了分析,找出了各部分热量损失的关系;根据发酵罐地理位置,对太阳照射下发酵罐表面受到的直接辐射、大气散射和地面反射进行了分析,对表面吸收及有效传导入罐内的能量进行了计算。结果表明,在冬季由于太阳辐射弱、散热量大,太阳辐射对发酵罐散热的影响非常小,十二月份减小散热量仅为3.77%,夏季日照时间长、太阳辐射强、散热量小,太阳辐射对发酵罐散热的影响变大,七月份可减小24.70%的散热量。实验验证修正后散热计算与实际散热误差不超过8.6%,该方法可用于预测发酵罐的运行能耗。
In order to study the influence of solar radiation on the heat dissipation of anaerobic fermenter, taking a biogas project in Beijing as an example, a one-dimensional steady-state model for heat dissipation of fermentation tank was established, the heat dissipation was analyzed and the relations of heat loss of different parts of fermenter were found out. The direct radiation, atmospheric scattering and ground reflection on the surface of the fermenter under solar irradiation were analyzed according to the location of fermenter. The energy absorbed by the surface and effectively transmitted into the tank was calculated. The results showed that, in the winter, due to weak solar radiation and large heat dissipation, solar radiation had very little effect on the heat dissipation of the fermenter, the heat dissipation in December only decreased by 3.77%. In summer, the duration of sunshine was long, the solar radiation was strong, and the heat dissipation was small. The influence of solar radiation on the heat dissipation of the fermentation tank became larger, and the heat dissipation could be reduced by 24.70% in July. The experimental results showed that the error between the modified heat dissipation calculation and the actual heat dissipation was no more than 8.6%.This method could be used to predict the energy consumption of fermenter.
作者
王春龙
张涵
李金平
吴文君
赵立磊
WANG Chun-long;ZHANG Han;LI Jin-ping;WU Wen-jun;ZHAO Li-lei(Western China Energy&Environment Research Center, Lanzhou University of Technology, Lanzhou 730050, China;Key Laboratory of Energy Supply System Drived by Biomass Energy and Solar Energy of Gansu Province, Lanzhou 730050, China;School of Energy and Power Engineering, Lanzhou University of Technology, Lanzhou 730050, China)
出处
《中国沼气》
2019年第2期50-56,共7页
China Biogas
基金
国家自然科学基金项目(51676094)
甘肃省杰出青年科学基金(2012GS05601)
甘肃省国际科技合作专项(1604WKCA009)
关键词
沼气工程
发酵罐
散热
太阳辐射
biogas project
anaerobic digestion tank
heat dissipation
solar radiation
