相变蓄热式太阳能秸秆沼气系统的热性能研究  

THERMAL PERFORMANCE RESEARCH OF SOLAR STRAW BIOGAS SYSTEM WITH PHASE CHANGE HEAT STORAGE

作　　者：王思雨 陆勇[1] 鹿浩伟 汪楚乔[1] 段文军 邱嘉明 Wang Siyu;Lu Yong;Lu Haowei;Wang Chuqiao;Duan Wenjun;Qiu Jiaming(School of Energy and Environment,Southeast University,Nanjing 210096,China)

机构地区：[1]东南大学能源与环境学院

出　　处：《太阳能学报》2018年第8期2081-2087,共7页Acta Energiae Solaris Sinica

基　　金：科技部国家科技支撑计划(2013BAJ10B12)

摘　　要：在项目示范基地安徽和县的太阳能秸秆沼气系统热性能实验结果表明：为保证长江中下游农村冬季稳定的中温发酵状态,需要利用太阳集热器与光伏发电相结合的太阳能光热、光伏联合应用技术;在冬季日平均环境温度为4.7℃的条件下系统稳定运行时,石蜡大部分时间均处于相变状态,相变蓄热水箱内部水温维持近似恒定且不低于55℃,达到稳定蓄热效果,可满足产气罐在冬季的中温发酵热负荷需求;冬季太阳能秸秆沼气系统热利用效率为42.3%,且仍有进一步提高的空间。The experimental results of thermal performance of solar straw biogas system in the project demonstration base located in Hexian of Anhui province show that it is necessary to combine solar collector with PV power generation to ensure the stable mesophilic fermentation in the middle and lower reaches of the Yangtze River during winter period.The paraffin layer can maintain phase transition state in most of time,and water temperature in phase change heat storage water tank maintains approximately constant which is not lower than 55 ℃ when this system runs stably under the average daily ambient temperature of 4.7 ℃ in winter,achieves the stable heat storage effect,satisfies the thermal load demand of gas producing tank for mesophilic fermentation in winter;the solar straw biogas fermentation system’s thermal utilization efficiency is 42.3% in winter,and there is still room for improvement.

关 键 词：太阳能 沼气 秸秆 相变蓄热 热性能 中温发酵 

分 类 号：TK512.4[动力工程及工程热物理—热能工程]